1306 lines
41 KiB
C
1306 lines
41 KiB
C
/*-------------------------------------------------------------------------
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*
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* c.h
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* Fundamental C definitions. This is included by every .c file in
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* PostgreSQL (via either postgres.h or postgres_fe.h, as appropriate).
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*
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* Note that the definitions here are not intended to be exposed to clients
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* of the frontend interface libraries --- so we don't worry much about
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* polluting the namespace with lots of stuff...
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*
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*
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* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/c.h
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*
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*-------------------------------------------------------------------------
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*/
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/*
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*----------------------------------------------------------------
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* TABLE OF CONTENTS
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*
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* When adding stuff to this file, please try to put stuff
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* into the relevant section, or add new sections as appropriate.
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*
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* section description
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* ------- ------------------------------------------------
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* 0) pg_config.h and standard system headers
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* 1) compiler characteristics
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* 2) bool, true, false
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* 3) standard system types
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* 4) IsValid macros for system types
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* 5) offsetof, lengthof, alignment
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* 6) assertions
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* 7) widely useful macros
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* 8) random stuff
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* 9) system-specific hacks
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*
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* NOTE: since this file is included by both frontend and backend modules,
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* it's usually wrong to put an "extern" declaration here, unless it's
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* ifdef'd so that it's seen in only one case or the other.
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* typedefs and macros are the kind of thing that might go here.
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*
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*----------------------------------------------------------------
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*/
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#ifndef C_H
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#define C_H
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#include "postgres_ext.h"
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/* Must undef pg_config_ext.h symbols before including pg_config.h */
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#undef PG_INT64_TYPE
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#include "pg_config.h"
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#include "pg_config_manual.h" /* must be after pg_config.h */
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#include "pg_config_os.h" /* must be before any system header files */
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/* System header files that should be available everywhere in Postgres */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stddef.h>
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#include <stdarg.h>
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#endif
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#include <sys/types.h>
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#include <errno.h>
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#if defined(WIN32) || defined(__CYGWIN__)
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#include <fcntl.h> /* ensure O_BINARY is available */
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#endif
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#include <locale.h>
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#ifdef ENABLE_NLS
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#include <libintl.h>
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#endif
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/* ----------------------------------------------------------------
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* Section 1: compiler characteristics
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*
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* type prefixes (const, signed, volatile, inline) are handled in pg_config.h.
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* ----------------------------------------------------------------
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*/
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/*
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* Disable "inline" if PG_FORCE_DISABLE_INLINE is defined.
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* This is used to work around compiler bugs and might also be useful for
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* investigatory purposes.
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*/
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#ifdef PG_FORCE_DISABLE_INLINE
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#undef inline
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#define inline
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#endif
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/*
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* Attribute macros
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*
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* GCC: https://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
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* GCC: https://gcc.gnu.org/onlinedocs/gcc/Type-Attributes.html
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* Sunpro: https://docs.oracle.com/cd/E18659_01/html/821-1384/gjzke.html
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* XLC: https://www.ibm.com/support/knowledgecenter/SSGH2K_13.1.2/com.ibm.xlc131.aix.doc/language_ref/function_attributes.html
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* XLC: https://www.ibm.com/support/knowledgecenter/SSGH2K_13.1.2/com.ibm.xlc131.aix.doc/language_ref/type_attrib.html
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*/
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/* only GCC supports the unused attribute */
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#ifdef __GNUC__
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#define pg_attribute_unused() __attribute__((unused))
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#else
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#define pg_attribute_unused()
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#endif
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/*
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* Append PG_USED_FOR_ASSERTS_ONLY to definitions of variables that are only
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* used in assert-enabled builds, to avoid compiler warnings about unused
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* variables in assert-disabled builds.
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*/
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#ifdef USE_ASSERT_CHECKING
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#define PG_USED_FOR_ASSERTS_ONLY
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#else
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#define PG_USED_FOR_ASSERTS_ONLY pg_attribute_unused()
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#endif
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/* GCC and XLC support format attributes */
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#if defined(__GNUC__) || defined(__IBMC__)
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#define pg_attribute_format_arg(a) __attribute__((format_arg(a)))
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#define pg_attribute_printf(f,a) __attribute__((format(PG_PRINTF_ATTRIBUTE, f, a)))
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#else
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#define pg_attribute_format_arg(a)
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#define pg_attribute_printf(f,a)
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#endif
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/* GCC, Sunpro and XLC support aligned, packed and noreturn */
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#if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__IBMC__)
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#define pg_attribute_aligned(a) __attribute__((aligned(a)))
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#define pg_attribute_noreturn() __attribute__((noreturn))
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#define pg_attribute_packed() __attribute__((packed))
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#define HAVE_PG_ATTRIBUTE_NORETURN 1
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#else
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/*
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* NB: aligned and packed are not given default definitions because they
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* affect code functionality; they *must* be implemented by the compiler
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* if they are to be used.
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*/
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#define pg_attribute_noreturn()
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#endif
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/*
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* Use "pg_attribute_always_inline" in place of "inline" for functions that
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* we wish to force inlining of, even when the compiler's heuristics would
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* choose not to. But, if possible, don't force inlining in unoptimized
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* debug builds.
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*/
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#if (defined(__GNUC__) && __GNUC__ > 3 && defined(__OPTIMIZE__)) || defined(__SUNPRO_C) || defined(__IBMC__)
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/* GCC > 3, Sunpro and XLC support always_inline via __attribute__ */
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#define pg_attribute_always_inline __attribute__((always_inline)) inline
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#elif defined(_MSC_VER)
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/* MSVC has a special keyword for this */
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#define pg_attribute_always_inline __forceinline
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#else
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/* Otherwise, the best we can do is to say "inline" */
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#define pg_attribute_always_inline inline
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#endif
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/*
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* Forcing a function not to be inlined can be useful if it's the slow path of
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* a performance-critical function, or should be visible in profiles to allow
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* for proper cost attribution. Note that unlike the pg_attribute_XXX macros
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* above, this should be placed before the function's return type and name.
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*/
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/* GCC, Sunpro and XLC support noinline via __attribute__ */
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#if (defined(__GNUC__) && __GNUC__ > 2) || defined(__SUNPRO_C) || defined(__IBMC__)
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#define pg_noinline __attribute__((noinline))
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/* msvc via declspec */
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#elif defined(_MSC_VER)
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#define pg_noinline __declspec(noinline)
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#else
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#define pg_noinline
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#endif
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/*
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* Mark a point as unreachable in a portable fashion. This should preferably
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* be something that the compiler understands, to aid code generation.
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* In assert-enabled builds, we prefer abort() for debugging reasons.
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*/
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#if defined(HAVE__BUILTIN_UNREACHABLE) && !defined(USE_ASSERT_CHECKING)
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#define pg_unreachable() __builtin_unreachable()
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#elif defined(_MSC_VER) && !defined(USE_ASSERT_CHECKING)
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#define pg_unreachable() __assume(0)
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#else
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#define pg_unreachable() abort()
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#endif
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/*
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* Hints to the compiler about the likelihood of a branch. Both likely() and
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* unlikely() return the boolean value of the contained expression.
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*
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* These should only be used sparingly, in very hot code paths. It's very easy
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* to mis-estimate likelihoods.
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*/
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#if __GNUC__ >= 3
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#define likely(x) __builtin_expect((x) != 0, 1)
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#define unlikely(x) __builtin_expect((x) != 0, 0)
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#else
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#define likely(x) ((x) != 0)
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#define unlikely(x) ((x) != 0)
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#endif
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/*
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* CppAsString
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* Convert the argument to a string, using the C preprocessor.
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* CppAsString2
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* Convert the argument to a string, after one round of macro expansion.
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* CppConcat
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* Concatenate two arguments together, using the C preprocessor.
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*
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* Note: There used to be support here for pre-ANSI C compilers that didn't
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* support # and ##. Nowadays, these macros are just for clarity and/or
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* backward compatibility with existing PostgreSQL code.
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*/
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#define CppAsString(identifier) #identifier
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#define CppAsString2(x) CppAsString(x)
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#define CppConcat(x, y) x##y
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/*
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* VA_ARGS_NARGS
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* Returns the number of macro arguments it is passed.
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*
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* An empty argument still counts as an argument, so effectively, this is
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* "one more than the number of commas in the argument list".
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*
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* This works for up to 63 arguments. Internally, VA_ARGS_NARGS_() is passed
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* 64+N arguments, and the C99 standard only requires macros to allow up to
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* 127 arguments, so we can't portably go higher. The implementation is
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* pretty trivial: VA_ARGS_NARGS_() returns its 64th argument, and we set up
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* the call so that that is the appropriate one of the list of constants.
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* This idea is due to Laurent Deniau.
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*/
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#define VA_ARGS_NARGS(...) \
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VA_ARGS_NARGS_(__VA_ARGS__, \
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63,62,61,60, \
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59,58,57,56,55,54,53,52,51,50, \
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49,48,47,46,45,44,43,42,41,40, \
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39,38,37,36,35,34,33,32,31,30, \
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29,28,27,26,25,24,23,22,21,20, \
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19,18,17,16,15,14,13,12,11,10, \
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9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
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#define VA_ARGS_NARGS_( \
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_01,_02,_03,_04,_05,_06,_07,_08,_09,_10, \
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_11,_12,_13,_14,_15,_16,_17,_18,_19,_20, \
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_21,_22,_23,_24,_25,_26,_27,_28,_29,_30, \
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_31,_32,_33,_34,_35,_36,_37,_38,_39,_40, \
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_41,_42,_43,_44,_45,_46,_47,_48,_49,_50, \
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_51,_52,_53,_54,_55,_56,_57,_58,_59,_60, \
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_61,_62,_63, N, ...) \
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(N)
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/*
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* dummyret is used to set return values in macros that use ?: to make
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* assignments. gcc wants these to be void, other compilers like char
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*/
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#ifdef __GNUC__ /* GNU cc */
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#define dummyret void
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#else
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#define dummyret char
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#endif
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/* Which __func__ symbol do we have, if any? */
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#ifdef HAVE_FUNCNAME__FUNC
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#define PG_FUNCNAME_MACRO __func__
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#else
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#ifdef HAVE_FUNCNAME__FUNCTION
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#define PG_FUNCNAME_MACRO __FUNCTION__
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#else
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#define PG_FUNCNAME_MACRO NULL
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#endif
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#endif
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/* ----------------------------------------------------------------
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* Section 2: bool, true, false
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* ----------------------------------------------------------------
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*/
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/*
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* bool
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* Boolean value, either true or false.
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*
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* Use stdbool.h if available and its bool has size 1. That's useful for
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* better compiler and debugger output and for compatibility with third-party
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* libraries. But PostgreSQL currently cannot deal with bool of other sizes;
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* there are static assertions around the code to prevent that.
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*
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* For C++ compilers, we assume the compiler has a compatible built-in
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* definition of bool.
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*/
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#ifndef __cplusplus
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#if defined(HAVE_STDBOOL_H) && SIZEOF_BOOL == 1
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#include <stdbool.h>
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#define USE_STDBOOL 1
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#else
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#ifndef bool
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typedef unsigned char bool;
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#endif
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#ifndef true
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#define true ((bool) 1)
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#endif
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#ifndef false
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#define false ((bool) 0)
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#endif
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#endif
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#endif /* not C++ */
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/* ----------------------------------------------------------------
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* Section 3: standard system types
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* ----------------------------------------------------------------
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*/
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/*
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* Pointer
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* Variable holding address of any memory resident object.
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*
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* XXX Pointer arithmetic is done with this, so it can't be void *
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* under "true" ANSI compilers.
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*/
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typedef char *Pointer;
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/*
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* intN
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* Signed integer, EXACTLY N BITS IN SIZE,
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* used for numerical computations and the
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* frontend/backend protocol.
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*/
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#ifndef HAVE_INT8
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typedef signed char int8; /* == 8 bits */
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typedef signed short int16; /* == 16 bits */
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typedef signed int int32; /* == 32 bits */
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#endif /* not HAVE_INT8 */
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/*
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* uintN
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* Unsigned integer, EXACTLY N BITS IN SIZE,
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* used for numerical computations and the
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* frontend/backend protocol.
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*/
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#ifndef HAVE_UINT8
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typedef unsigned char uint8; /* == 8 bits */
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typedef unsigned short uint16; /* == 16 bits */
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typedef unsigned int uint32; /* == 32 bits */
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#endif /* not HAVE_UINT8 */
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/*
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* bitsN
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* Unit of bitwise operation, AT LEAST N BITS IN SIZE.
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*/
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typedef uint8 bits8; /* >= 8 bits */
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typedef uint16 bits16; /* >= 16 bits */
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typedef uint32 bits32; /* >= 32 bits */
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/*
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* 64-bit integers
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*/
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#ifdef HAVE_LONG_INT_64
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/* Plain "long int" fits, use it */
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#ifndef HAVE_INT64
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typedef long int int64;
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#endif
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#ifndef HAVE_UINT64
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typedef unsigned long int uint64;
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#endif
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#define INT64CONST(x) (x##L)
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#define UINT64CONST(x) (x##UL)
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#elif defined(HAVE_LONG_LONG_INT_64)
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/* We have working support for "long long int", use that */
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#ifndef HAVE_INT64
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typedef long long int int64;
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#endif
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#ifndef HAVE_UINT64
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typedef unsigned long long int uint64;
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#endif
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#define INT64CONST(x) (x##LL)
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#define UINT64CONST(x) (x##ULL)
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#else
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/* neither HAVE_LONG_INT_64 nor HAVE_LONG_LONG_INT_64 */
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#error must have a working 64-bit integer datatype
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#endif
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/* snprintf format strings to use for 64-bit integers */
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#define INT64_FORMAT "%" INT64_MODIFIER "d"
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#define UINT64_FORMAT "%" INT64_MODIFIER "u"
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/*
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* 128-bit signed and unsigned integers
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* There currently is only limited support for such types.
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* E.g. 128bit literals and snprintf are not supported; but math is.
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* Also, because we exclude such types when choosing MAXIMUM_ALIGNOF,
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* it must be possible to coerce the compiler to allocate them on no
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* more than MAXALIGN boundaries.
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*/
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#if defined(PG_INT128_TYPE)
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#if defined(pg_attribute_aligned) || ALIGNOF_PG_INT128_TYPE <= MAXIMUM_ALIGNOF
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#define HAVE_INT128 1
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typedef PG_INT128_TYPE int128
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#if defined(pg_attribute_aligned)
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pg_attribute_aligned(MAXIMUM_ALIGNOF)
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#endif
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;
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typedef unsigned PG_INT128_TYPE uint128
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#if defined(pg_attribute_aligned)
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pg_attribute_aligned(MAXIMUM_ALIGNOF)
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#endif
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;
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#endif
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#endif
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|
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/*
|
|
* stdint.h limits aren't guaranteed to be present and aren't guaranteed to
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* have compatible types with our fixed width types. So just define our own.
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*/
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#define PG_INT8_MIN (-0x7F-1)
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#define PG_INT8_MAX (0x7F)
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#define PG_UINT8_MAX (0xFF)
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#define PG_INT16_MIN (-0x7FFF-1)
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#define PG_INT16_MAX (0x7FFF)
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#define PG_UINT16_MAX (0xFFFF)
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#define PG_INT32_MIN (-0x7FFFFFFF-1)
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#define PG_INT32_MAX (0x7FFFFFFF)
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#define PG_UINT32_MAX (0xFFFFFFFFU)
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#define PG_INT64_MIN (-INT64CONST(0x7FFFFFFFFFFFFFFF) - 1)
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#define PG_INT64_MAX INT64CONST(0x7FFFFFFFFFFFFFFF)
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#define PG_UINT64_MAX UINT64CONST(0xFFFFFFFFFFFFFFFF)
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|
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/* Max value of size_t might also be missing if we don't have stdint.h */
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#ifndef SIZE_MAX
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#if SIZEOF_SIZE_T == 8
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#define SIZE_MAX PG_UINT64_MAX
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#else
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#define SIZE_MAX PG_UINT32_MAX
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#endif
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#endif
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|
|
|
/*
|
|
* We now always use int64 timestamps, but keep this symbol defined for the
|
|
* benefit of external code that might test it.
|
|
*/
|
|
#define HAVE_INT64_TIMESTAMP
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|
|
|
/*
|
|
* Size
|
|
* Size of any memory resident object, as returned by sizeof.
|
|
*/
|
|
typedef size_t Size;
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|
|
|
/*
|
|
* Index
|
|
* Index into any memory resident array.
|
|
*
|
|
* Note:
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* Indices are non negative.
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|
*/
|
|
typedef unsigned int Index;
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|
|
/*
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|
* Offset
|
|
* Offset into any memory resident array.
|
|
*
|
|
* Note:
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|
* This differs from an Index in that an Index is always
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* non negative, whereas Offset may be negative.
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*/
|
|
typedef signed int Offset;
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|
|
/*
|
|
* Common Postgres datatype names (as used in the catalogs)
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|
*/
|
|
typedef float float4;
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|
typedef double float8;
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|
|
|
/*
|
|
* Oid, RegProcedure, TransactionId, SubTransactionId, MultiXactId,
|
|
* CommandId
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|
*/
|
|
|
|
/* typedef Oid is in postgres_ext.h */
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|
|
|
/*
|
|
* regproc is the type name used in the include/catalog headers, but
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|
* RegProcedure is the preferred name in C code.
|
|
*/
|
|
typedef Oid regproc;
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|
typedef regproc RegProcedure;
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|
|
|
typedef uint32 TransactionId;
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|
|
|
typedef uint32 LocalTransactionId;
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|
|
|
typedef uint32 SubTransactionId;
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|
|
|
#define InvalidSubTransactionId ((SubTransactionId) 0)
|
|
#define TopSubTransactionId ((SubTransactionId) 1)
|
|
|
|
/* MultiXactId must be equivalent to TransactionId, to fit in t_xmax */
|
|
typedef TransactionId MultiXactId;
|
|
|
|
typedef uint32 MultiXactOffset;
|
|
|
|
typedef uint32 CommandId;
|
|
|
|
#define FirstCommandId ((CommandId) 0)
|
|
#define InvalidCommandId (~(CommandId)0)
|
|
|
|
/*
|
|
* Array indexing support
|
|
*/
|
|
#define MAXDIM 6
|
|
typedef struct
|
|
{
|
|
int indx[MAXDIM];
|
|
} IntArray;
|
|
|
|
/* ----------------
|
|
* Variable-length datatypes all share the 'struct varlena' header.
|
|
*
|
|
* NOTE: for TOASTable types, this is an oversimplification, since the value
|
|
* may be compressed or moved out-of-line. However datatype-specific routines
|
|
* are mostly content to deal with de-TOASTed values only, and of course
|
|
* client-side routines should never see a TOASTed value. But even in a
|
|
* de-TOASTed value, beware of touching vl_len_ directly, as its
|
|
* representation is no longer convenient. It's recommended that code always
|
|
* use macros VARDATA_ANY, VARSIZE_ANY, VARSIZE_ANY_EXHDR, VARDATA, VARSIZE,
|
|
* and SET_VARSIZE instead of relying on direct mentions of the struct fields.
|
|
* See postgres.h for details of the TOASTed form.
|
|
* ----------------
|
|
*/
|
|
struct varlena
|
|
{
|
|
char vl_len_[4]; /* Do not touch this field directly! */
|
|
char vl_dat[FLEXIBLE_ARRAY_MEMBER]; /* Data content is here */
|
|
};
|
|
|
|
#define VARHDRSZ ((int32) sizeof(int32))
|
|
|
|
/*
|
|
* These widely-used datatypes are just a varlena header and the data bytes.
|
|
* There is no terminating null or anything like that --- the data length is
|
|
* always VARSIZE_ANY_EXHDR(ptr).
|
|
*/
|
|
typedef struct varlena bytea;
|
|
typedef struct varlena text;
|
|
typedef struct varlena BpChar; /* blank-padded char, ie SQL char(n) */
|
|
typedef struct varlena VarChar; /* var-length char, ie SQL varchar(n) */
|
|
|
|
/*
|
|
* Specialized array types. These are physically laid out just the same
|
|
* as regular arrays (so that the regular array subscripting code works
|
|
* with them). They exist as distinct types mostly for historical reasons:
|
|
* they have nonstandard I/O behavior which we don't want to change for fear
|
|
* of breaking applications that look at the system catalogs. There is also
|
|
* an implementation issue for oidvector: it's part of the primary key for
|
|
* pg_proc, and we can't use the normal btree array support routines for that
|
|
* without circularity.
|
|
*/
|
|
typedef struct
|
|
{
|
|
int32 vl_len_; /* these fields must match ArrayType! */
|
|
int ndim; /* always 1 for int2vector */
|
|
int32 dataoffset; /* always 0 for int2vector */
|
|
Oid elemtype;
|
|
int dim1;
|
|
int lbound1;
|
|
int16 values[FLEXIBLE_ARRAY_MEMBER];
|
|
} int2vector;
|
|
|
|
typedef struct
|
|
{
|
|
int32 vl_len_; /* these fields must match ArrayType! */
|
|
int ndim; /* always 1 for oidvector */
|
|
int32 dataoffset; /* always 0 for oidvector */
|
|
Oid elemtype;
|
|
int dim1;
|
|
int lbound1;
|
|
Oid values[FLEXIBLE_ARRAY_MEMBER];
|
|
} oidvector;
|
|
|
|
/*
|
|
* Representation of a Name: effectively just a C string, but null-padded to
|
|
* exactly NAMEDATALEN bytes. The use of a struct is historical.
|
|
*/
|
|
typedef struct nameData
|
|
{
|
|
char data[NAMEDATALEN];
|
|
} NameData;
|
|
typedef NameData *Name;
|
|
|
|
#define NameStr(name) ((name).data)
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
|
* Section 4: IsValid macros for system types
|
|
* ----------------------------------------------------------------
|
|
*/
|
|
/*
|
|
* BoolIsValid
|
|
* True iff bool is valid.
|
|
*/
|
|
#define BoolIsValid(boolean) ((boolean) == false || (boolean) == true)
|
|
|
|
/*
|
|
* PointerIsValid
|
|
* True iff pointer is valid.
|
|
*/
|
|
#define PointerIsValid(pointer) ((const void*)(pointer) != NULL)
|
|
|
|
/*
|
|
* PointerIsAligned
|
|
* True iff pointer is properly aligned to point to the given type.
|
|
*/
|
|
#define PointerIsAligned(pointer, type) \
|
|
(((uintptr_t)(pointer) % (sizeof (type))) == 0)
|
|
|
|
#define OffsetToPointer(base, offset) \
|
|
((void *)((char *) base + offset))
|
|
|
|
#define OidIsValid(objectId) ((bool) ((objectId) != InvalidOid))
|
|
|
|
#define RegProcedureIsValid(p) OidIsValid(p)
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
|
* Section 5: offsetof, lengthof, alignment
|
|
* ----------------------------------------------------------------
|
|
*/
|
|
/*
|
|
* offsetof
|
|
* Offset of a structure/union field within that structure/union.
|
|
*
|
|
* XXX This is supposed to be part of stddef.h, but isn't on
|
|
* some systems (like SunOS 4).
|
|
*/
|
|
#ifndef offsetof
|
|
#define offsetof(type, field) ((long) &((type *)0)->field)
|
|
#endif /* offsetof */
|
|
|
|
/*
|
|
* lengthof
|
|
* Number of elements in an array.
|
|
*/
|
|
#define lengthof(array) (sizeof (array) / sizeof ((array)[0]))
|
|
|
|
/* ----------------
|
|
* Alignment macros: align a length or address appropriately for a given type.
|
|
* The fooALIGN() macros round up to a multiple of the required alignment,
|
|
* while the fooALIGN_DOWN() macros round down. The latter are more useful
|
|
* for problems like "how many X-sized structures will fit in a page?".
|
|
*
|
|
* NOTE: TYPEALIGN[_DOWN] will not work if ALIGNVAL is not a power of 2.
|
|
* That case seems extremely unlikely to be needed in practice, however.
|
|
*
|
|
* NOTE: MAXIMUM_ALIGNOF, and hence MAXALIGN(), intentionally exclude any
|
|
* larger-than-8-byte types the compiler might have.
|
|
* ----------------
|
|
*/
|
|
|
|
#define TYPEALIGN(ALIGNVAL,LEN) \
|
|
(((uintptr_t) (LEN) + ((ALIGNVAL) - 1)) & ~((uintptr_t) ((ALIGNVAL) - 1)))
|
|
|
|
#define SHORTALIGN(LEN) TYPEALIGN(ALIGNOF_SHORT, (LEN))
|
|
#define INTALIGN(LEN) TYPEALIGN(ALIGNOF_INT, (LEN))
|
|
#define LONGALIGN(LEN) TYPEALIGN(ALIGNOF_LONG, (LEN))
|
|
#define DOUBLEALIGN(LEN) TYPEALIGN(ALIGNOF_DOUBLE, (LEN))
|
|
#define MAXALIGN(LEN) TYPEALIGN(MAXIMUM_ALIGNOF, (LEN))
|
|
/* MAXALIGN covers only built-in types, not buffers */
|
|
#define BUFFERALIGN(LEN) TYPEALIGN(ALIGNOF_BUFFER, (LEN))
|
|
#define CACHELINEALIGN(LEN) TYPEALIGN(PG_CACHE_LINE_SIZE, (LEN))
|
|
|
|
#define TYPEALIGN_DOWN(ALIGNVAL,LEN) \
|
|
(((uintptr_t) (LEN)) & ~((uintptr_t) ((ALIGNVAL) - 1)))
|
|
|
|
#define SHORTALIGN_DOWN(LEN) TYPEALIGN_DOWN(ALIGNOF_SHORT, (LEN))
|
|
#define INTALIGN_DOWN(LEN) TYPEALIGN_DOWN(ALIGNOF_INT, (LEN))
|
|
#define LONGALIGN_DOWN(LEN) TYPEALIGN_DOWN(ALIGNOF_LONG, (LEN))
|
|
#define DOUBLEALIGN_DOWN(LEN) TYPEALIGN_DOWN(ALIGNOF_DOUBLE, (LEN))
|
|
#define MAXALIGN_DOWN(LEN) TYPEALIGN_DOWN(MAXIMUM_ALIGNOF, (LEN))
|
|
#define BUFFERALIGN_DOWN(LEN) TYPEALIGN_DOWN(ALIGNOF_BUFFER, (LEN))
|
|
|
|
/*
|
|
* The above macros will not work with types wider than uintptr_t, like with
|
|
* uint64 on 32-bit platforms. That's not problem for the usual use where a
|
|
* pointer or a length is aligned, but for the odd case that you need to
|
|
* align something (potentially) wider, use TYPEALIGN64.
|
|
*/
|
|
#define TYPEALIGN64(ALIGNVAL,LEN) \
|
|
(((uint64) (LEN) + ((ALIGNVAL) - 1)) & ~((uint64) ((ALIGNVAL) - 1)))
|
|
|
|
/* we don't currently need wider versions of the other ALIGN macros */
|
|
#define MAXALIGN64(LEN) TYPEALIGN64(MAXIMUM_ALIGNOF, (LEN))
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
|
* Section 6: assertions
|
|
* ----------------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* USE_ASSERT_CHECKING, if defined, turns on all the assertions.
|
|
* - plai 9/5/90
|
|
*
|
|
* It should _NOT_ be defined in releases or in benchmark copies
|
|
*/
|
|
|
|
/*
|
|
* Assert() can be used in both frontend and backend code. In frontend code it
|
|
* just calls the standard assert, if it's available. If use of assertions is
|
|
* not configured, it does nothing.
|
|
*/
|
|
#ifndef USE_ASSERT_CHECKING
|
|
|
|
#define Assert(condition) ((void)true)
|
|
#define AssertMacro(condition) ((void)true)
|
|
#define AssertArg(condition) ((void)true)
|
|
#define AssertState(condition) ((void)true)
|
|
#define AssertPointerAlignment(ptr, bndr) ((void)true)
|
|
#define Trap(condition, errorType) ((void)true)
|
|
#define TrapMacro(condition, errorType) (true)
|
|
|
|
#elif defined(FRONTEND)
|
|
|
|
#include <assert.h>
|
|
#define Assert(p) assert(p)
|
|
#define AssertMacro(p) ((void) assert(p))
|
|
#define AssertArg(condition) assert(condition)
|
|
#define AssertState(condition) assert(condition)
|
|
#define AssertPointerAlignment(ptr, bndr) ((void)true)
|
|
|
|
#else /* USE_ASSERT_CHECKING && !FRONTEND */
|
|
|
|
/*
|
|
* Trap
|
|
* Generates an exception if the given condition is true.
|
|
*/
|
|
#define Trap(condition, errorType) \
|
|
do { \
|
|
if (condition) \
|
|
ExceptionalCondition(#condition, (errorType), \
|
|
__FILE__, __LINE__); \
|
|
} while (0)
|
|
|
|
/*
|
|
* TrapMacro is the same as Trap but it's intended for use in macros:
|
|
*
|
|
* #define foo(x) (AssertMacro(x != 0), bar(x))
|
|
*
|
|
* Isn't CPP fun?
|
|
*/
|
|
#define TrapMacro(condition, errorType) \
|
|
((bool) (! (condition) || \
|
|
(ExceptionalCondition(#condition, (errorType), \
|
|
__FILE__, __LINE__), 0)))
|
|
|
|
#define Assert(condition) \
|
|
do { \
|
|
if (!(condition)) \
|
|
ExceptionalCondition(#condition, "FailedAssertion", \
|
|
__FILE__, __LINE__); \
|
|
} while (0)
|
|
|
|
#define AssertMacro(condition) \
|
|
((void) ((condition) || \
|
|
(ExceptionalCondition(#condition, "FailedAssertion", \
|
|
__FILE__, __LINE__), 0)))
|
|
|
|
#define AssertArg(condition) \
|
|
do { \
|
|
if (!(condition)) \
|
|
ExceptionalCondition(#condition, "BadArgument", \
|
|
__FILE__, __LINE__); \
|
|
} while (0)
|
|
|
|
#define AssertState(condition) \
|
|
do { \
|
|
if (!(condition)) \
|
|
ExceptionalCondition(#condition, "BadState", \
|
|
__FILE__, __LINE__); \
|
|
} while (0)
|
|
|
|
/*
|
|
* Check that `ptr' is `bndr' aligned.
|
|
*/
|
|
#define AssertPointerAlignment(ptr, bndr) \
|
|
Trap(TYPEALIGN(bndr, (uintptr_t)(ptr)) != (uintptr_t)(ptr), \
|
|
"UnalignedPointer")
|
|
|
|
#endif /* USE_ASSERT_CHECKING && !FRONTEND */
|
|
|
|
/*
|
|
* ExceptionalCondition is compiled into the backend whether or not
|
|
* USE_ASSERT_CHECKING is defined, so as to support use of extensions
|
|
* that are built with that #define with a backend that isn't. Hence,
|
|
* we should declare it as long as !FRONTEND.
|
|
*/
|
|
#ifndef FRONTEND
|
|
extern void ExceptionalCondition(const char *conditionName,
|
|
const char *errorType,
|
|
const char *fileName, int lineNumber) pg_attribute_noreturn();
|
|
#endif
|
|
|
|
/*
|
|
* Macros to support compile-time assertion checks.
|
|
*
|
|
* If the "condition" (a compile-time-constant expression) evaluates to false,
|
|
* throw a compile error using the "errmessage" (a string literal).
|
|
*
|
|
* gcc 4.6 and up supports _Static_assert(), but there are bizarre syntactic
|
|
* placement restrictions. These macros make it safe to use as a statement
|
|
* or in an expression, respectively.
|
|
*
|
|
* Otherwise we fall back on a kluge that assumes the compiler will complain
|
|
* about a negative width for a struct bit-field. This will not include a
|
|
* helpful error message, but it beats not getting an error at all.
|
|
*/
|
|
#ifndef __cplusplus
|
|
#ifdef HAVE__STATIC_ASSERT
|
|
#define StaticAssertStmt(condition, errmessage) \
|
|
do { _Static_assert(condition, errmessage); } while(0)
|
|
#define StaticAssertExpr(condition, errmessage) \
|
|
((void) ({ StaticAssertStmt(condition, errmessage); true; }))
|
|
#else /* !HAVE__STATIC_ASSERT */
|
|
#define StaticAssertStmt(condition, errmessage) \
|
|
((void) sizeof(struct { int static_assert_failure : (condition) ? 1 : -1; }))
|
|
#define StaticAssertExpr(condition, errmessage) \
|
|
StaticAssertStmt(condition, errmessage)
|
|
#endif /* HAVE__STATIC_ASSERT */
|
|
#else /* C++ */
|
|
#if defined(__cpp_static_assert) && __cpp_static_assert >= 200410
|
|
#define StaticAssertStmt(condition, errmessage) \
|
|
static_assert(condition, errmessage)
|
|
#define StaticAssertExpr(condition, errmessage) \
|
|
({ static_assert(condition, errmessage); })
|
|
#else
|
|
#define StaticAssertStmt(condition, errmessage) \
|
|
do { struct static_assert_struct { int static_assert_failure : (condition) ? 1 : -1; }; } while(0)
|
|
#define StaticAssertExpr(condition, errmessage) \
|
|
((void) ({ StaticAssertStmt(condition, errmessage); }))
|
|
#endif
|
|
#endif /* C++ */
|
|
|
|
|
|
/*
|
|
* Compile-time checks that a variable (or expression) has the specified type.
|
|
*
|
|
* AssertVariableIsOfType() can be used as a statement.
|
|
* AssertVariableIsOfTypeMacro() is intended for use in macros, eg
|
|
* #define foo(x) (AssertVariableIsOfTypeMacro(x, int), bar(x))
|
|
*
|
|
* If we don't have __builtin_types_compatible_p, we can still assert that
|
|
* the types have the same size. This is far from ideal (especially on 32-bit
|
|
* platforms) but it provides at least some coverage.
|
|
*/
|
|
#ifdef HAVE__BUILTIN_TYPES_COMPATIBLE_P
|
|
#define AssertVariableIsOfType(varname, typename) \
|
|
StaticAssertStmt(__builtin_types_compatible_p(__typeof__(varname), typename), \
|
|
CppAsString(varname) " does not have type " CppAsString(typename))
|
|
#define AssertVariableIsOfTypeMacro(varname, typename) \
|
|
(StaticAssertExpr(__builtin_types_compatible_p(__typeof__(varname), typename), \
|
|
CppAsString(varname) " does not have type " CppAsString(typename)))
|
|
#else /* !HAVE__BUILTIN_TYPES_COMPATIBLE_P */
|
|
#define AssertVariableIsOfType(varname, typename) \
|
|
StaticAssertStmt(sizeof(varname) == sizeof(typename), \
|
|
CppAsString(varname) " does not have type " CppAsString(typename))
|
|
#define AssertVariableIsOfTypeMacro(varname, typename) \
|
|
(StaticAssertExpr(sizeof(varname) == sizeof(typename), \
|
|
CppAsString(varname) " does not have type " CppAsString(typename)))
|
|
#endif /* HAVE__BUILTIN_TYPES_COMPATIBLE_P */
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
|
* Section 7: widely useful macros
|
|
* ----------------------------------------------------------------
|
|
*/
|
|
/*
|
|
* Max
|
|
* Return the maximum of two numbers.
|
|
*/
|
|
#define Max(x, y) ((x) > (y) ? (x) : (y))
|
|
|
|
/*
|
|
* Min
|
|
* Return the minimum of two numbers.
|
|
*/
|
|
#define Min(x, y) ((x) < (y) ? (x) : (y))
|
|
|
|
/*
|
|
* Abs
|
|
* Return the absolute value of the argument.
|
|
*/
|
|
#define Abs(x) ((x) >= 0 ? (x) : -(x))
|
|
|
|
/*
|
|
* StrNCpy
|
|
* Like standard library function strncpy(), except that result string
|
|
* is guaranteed to be null-terminated --- that is, at most N-1 bytes
|
|
* of the source string will be kept.
|
|
* Also, the macro returns no result (too hard to do that without
|
|
* evaluating the arguments multiple times, which seems worse).
|
|
*
|
|
* BTW: when you need to copy a non-null-terminated string (like a text
|
|
* datum) and add a null, do not do it with StrNCpy(..., len+1). That
|
|
* might seem to work, but it fetches one byte more than there is in the
|
|
* text object. One fine day you'll have a SIGSEGV because there isn't
|
|
* another byte before the end of memory. Don't laugh, we've had real
|
|
* live bug reports from real live users over exactly this mistake.
|
|
* Do it honestly with "memcpy(dst,src,len); dst[len] = '\0';", instead.
|
|
*/
|
|
#define StrNCpy(dst,src,len) \
|
|
do \
|
|
{ \
|
|
char * _dst = (dst); \
|
|
Size _len = (len); \
|
|
\
|
|
if (_len > 0) \
|
|
{ \
|
|
strncpy(_dst, (src), _len); \
|
|
_dst[_len-1] = '\0'; \
|
|
} \
|
|
} while (0)
|
|
|
|
|
|
/* Get a bit mask of the bits set in non-long aligned addresses */
|
|
#define LONG_ALIGN_MASK (sizeof(long) - 1)
|
|
|
|
/*
|
|
* MemSet
|
|
* Exactly the same as standard library function memset(), but considerably
|
|
* faster for zeroing small word-aligned structures (such as parsetree nodes).
|
|
* This has to be a macro because the main point is to avoid function-call
|
|
* overhead. However, we have also found that the loop is faster than
|
|
* native libc memset() on some platforms, even those with assembler
|
|
* memset() functions. More research needs to be done, perhaps with
|
|
* MEMSET_LOOP_LIMIT tests in configure.
|
|
*/
|
|
#define MemSet(start, val, len) \
|
|
do \
|
|
{ \
|
|
/* must be void* because we don't know if it is integer aligned yet */ \
|
|
void *_vstart = (void *) (start); \
|
|
int _val = (val); \
|
|
Size _len = (len); \
|
|
\
|
|
if ((((uintptr_t) _vstart) & LONG_ALIGN_MASK) == 0 && \
|
|
(_len & LONG_ALIGN_MASK) == 0 && \
|
|
_val == 0 && \
|
|
_len <= MEMSET_LOOP_LIMIT && \
|
|
/* \
|
|
* If MEMSET_LOOP_LIMIT == 0, optimizer should find \
|
|
* the whole "if" false at compile time. \
|
|
*/ \
|
|
MEMSET_LOOP_LIMIT != 0) \
|
|
{ \
|
|
long *_start = (long *) _vstart; \
|
|
long *_stop = (long *) ((char *) _start + _len); \
|
|
while (_start < _stop) \
|
|
*_start++ = 0; \
|
|
} \
|
|
else \
|
|
memset(_vstart, _val, _len); \
|
|
} while (0)
|
|
|
|
/*
|
|
* MemSetAligned is the same as MemSet except it omits the test to see if
|
|
* "start" is word-aligned. This is okay to use if the caller knows a-priori
|
|
* that the pointer is suitably aligned (typically, because he just got it
|
|
* from palloc(), which always delivers a max-aligned pointer).
|
|
*/
|
|
#define MemSetAligned(start, val, len) \
|
|
do \
|
|
{ \
|
|
long *_start = (long *) (start); \
|
|
int _val = (val); \
|
|
Size _len = (len); \
|
|
\
|
|
if ((_len & LONG_ALIGN_MASK) == 0 && \
|
|
_val == 0 && \
|
|
_len <= MEMSET_LOOP_LIMIT && \
|
|
MEMSET_LOOP_LIMIT != 0) \
|
|
{ \
|
|
long *_stop = (long *) ((char *) _start + _len); \
|
|
while (_start < _stop) \
|
|
*_start++ = 0; \
|
|
} \
|
|
else \
|
|
memset(_start, _val, _len); \
|
|
} while (0)
|
|
|
|
|
|
/*
|
|
* MemSetTest/MemSetLoop are a variant version that allow all the tests in
|
|
* MemSet to be done at compile time in cases where "val" and "len" are
|
|
* constants *and* we know the "start" pointer must be word-aligned.
|
|
* If MemSetTest succeeds, then it is okay to use MemSetLoop, otherwise use
|
|
* MemSetAligned. Beware of multiple evaluations of the arguments when using
|
|
* this approach.
|
|
*/
|
|
#define MemSetTest(val, len) \
|
|
( ((len) & LONG_ALIGN_MASK) == 0 && \
|
|
(len) <= MEMSET_LOOP_LIMIT && \
|
|
MEMSET_LOOP_LIMIT != 0 && \
|
|
(val) == 0 )
|
|
|
|
#define MemSetLoop(start, val, len) \
|
|
do \
|
|
{ \
|
|
long * _start = (long *) (start); \
|
|
long * _stop = (long *) ((char *) _start + (Size) (len)); \
|
|
\
|
|
while (_start < _stop) \
|
|
*_start++ = 0; \
|
|
} while (0)
|
|
|
|
/*
|
|
* Macros for range-checking float values before converting to integer.
|
|
* We must be careful here that the boundary values are expressed exactly
|
|
* in the float domain. PG_INTnn_MIN is an exact power of 2, so it will
|
|
* be represented exactly; but PG_INTnn_MAX isn't, and might get rounded
|
|
* off, so avoid using that.
|
|
* The input must be rounded to an integer beforehand, typically with rint(),
|
|
* else we might draw the wrong conclusion about close-to-the-limit values.
|
|
* These macros will do the right thing for Inf, but not necessarily for NaN,
|
|
* so check isnan(num) first if that's a possibility.
|
|
*/
|
|
#define FLOAT4_FITS_IN_INT16(num) \
|
|
((num) >= (float4) PG_INT16_MIN && (num) < -((float4) PG_INT16_MIN))
|
|
#define FLOAT4_FITS_IN_INT32(num) \
|
|
((num) >= (float4) PG_INT32_MIN && (num) < -((float4) PG_INT32_MIN))
|
|
#define FLOAT4_FITS_IN_INT64(num) \
|
|
((num) >= (float4) PG_INT64_MIN && (num) < -((float4) PG_INT64_MIN))
|
|
#define FLOAT8_FITS_IN_INT16(num) \
|
|
((num) >= (float8) PG_INT16_MIN && (num) < -((float8) PG_INT16_MIN))
|
|
#define FLOAT8_FITS_IN_INT32(num) \
|
|
((num) >= (float8) PG_INT32_MIN && (num) < -((float8) PG_INT32_MIN))
|
|
#define FLOAT8_FITS_IN_INT64(num) \
|
|
((num) >= (float8) PG_INT64_MIN && (num) < -((float8) PG_INT64_MIN))
|
|
|
|
|
|
/* ----------------------------------------------------------------
|
|
* Section 8: random stuff
|
|
* ----------------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* Invert the sign of a qsort-style comparison result, ie, exchange negative
|
|
* and positive integer values, being careful not to get the wrong answer
|
|
* for INT_MIN. The argument should be an integral variable.
|
|
*/
|
|
#define INVERT_COMPARE_RESULT(var) \
|
|
((var) = ((var) < 0) ? 1 : -(var))
|
|
|
|
/*
|
|
* Use this, not "char buf[BLCKSZ]", to declare a field or local variable
|
|
* holding a page buffer, if that page might be accessed as a page and not
|
|
* just a string of bytes. Otherwise the variable might be under-aligned,
|
|
* causing problems on alignment-picky hardware. (In some places, we use
|
|
* this to declare buffers even though we only pass them to read() and
|
|
* write(), because copying to/from aligned buffers is usually faster than
|
|
* using unaligned buffers.) We include both "double" and "int64" in the
|
|
* union to ensure that the compiler knows the value must be MAXALIGN'ed
|
|
* (cf. configure's computation of MAXIMUM_ALIGNOF).
|
|
*/
|
|
typedef union PGAlignedBlock
|
|
{
|
|
char data[BLCKSZ];
|
|
double force_align_d;
|
|
int64 force_align_i64;
|
|
} PGAlignedBlock;
|
|
|
|
/* Same, but for an XLOG_BLCKSZ-sized buffer */
|
|
typedef union PGAlignedXLogBlock
|
|
{
|
|
char data[XLOG_BLCKSZ];
|
|
double force_align_d;
|
|
int64 force_align_i64;
|
|
} PGAlignedXLogBlock;
|
|
|
|
/* msb for char */
|
|
#define HIGHBIT (0x80)
|
|
#define IS_HIGHBIT_SET(ch) ((unsigned char)(ch) & HIGHBIT)
|
|
|
|
/*
|
|
* Support macros for escaping strings. escape_backslash should be true
|
|
* if generating a non-standard-conforming string. Prefixing a string
|
|
* with ESCAPE_STRING_SYNTAX guarantees it is non-standard-conforming.
|
|
* Beware of multiple evaluation of the "ch" argument!
|
|
*/
|
|
#define SQL_STR_DOUBLE(ch, escape_backslash) \
|
|
((ch) == '\'' || ((ch) == '\\' && (escape_backslash)))
|
|
|
|
#define ESCAPE_STRING_SYNTAX 'E'
|
|
|
|
|
|
#define STATUS_OK (0)
|
|
#define STATUS_ERROR (-1)
|
|
#define STATUS_EOF (-2)
|
|
#define STATUS_FOUND (1)
|
|
#define STATUS_WAITING (2)
|
|
|
|
/*
|
|
* gettext support
|
|
*/
|
|
|
|
#ifndef ENABLE_NLS
|
|
/* stuff we'd otherwise get from <libintl.h> */
|
|
#define gettext(x) (x)
|
|
#define dgettext(d,x) (x)
|
|
#define ngettext(s,p,n) ((n) == 1 ? (s) : (p))
|
|
#define dngettext(d,s,p,n) ((n) == 1 ? (s) : (p))
|
|
#endif
|
|
|
|
#define _(x) gettext(x)
|
|
|
|
/*
|
|
* Use this to mark string constants as needing translation at some later
|
|
* time, rather than immediately. This is useful for cases where you need
|
|
* access to the original string and translated string, and for cases where
|
|
* immediate translation is not possible, like when initializing global
|
|
* variables.
|
|
* http://www.gnu.org/software/autoconf/manual/gettext/Special-cases.html
|
|
*/
|
|
#define gettext_noop(x) (x)
|
|
|
|
/*
|
|
* To better support parallel installations of major PostgreSQL
|
|
* versions as well as parallel installations of major library soname
|
|
* versions, we mangle the gettext domain name by appending those
|
|
* version numbers. The coding rule ought to be that wherever the
|
|
* domain name is mentioned as a literal, it must be wrapped into
|
|
* PG_TEXTDOMAIN(). The macros below do not work on non-literals; but
|
|
* that is somewhat intentional because it avoids having to worry
|
|
* about multiple states of premangling and postmangling as the values
|
|
* are being passed around.
|
|
*
|
|
* Make sure this matches the installation rules in nls-global.mk.
|
|
*/
|
|
#ifdef SO_MAJOR_VERSION
|
|
#define PG_TEXTDOMAIN(domain) (domain CppAsString2(SO_MAJOR_VERSION) "-" PG_MAJORVERSION)
|
|
#else
|
|
#define PG_TEXTDOMAIN(domain) (domain "-" PG_MAJORVERSION)
|
|
#endif
|
|
|
|
/*
|
|
* Macro that allows to cast constness and volatile away from an expression, but doesn't
|
|
* allow changing the underlying type. Enforcement of the latter
|
|
* currently only works for gcc like compilers.
|
|
*
|
|
* Please note IT IS NOT SAFE to cast constness away if the result will ever
|
|
* be modified (it would be undefined behaviour). Doing so anyway can cause
|
|
* compiler misoptimizations or runtime crashes (modifying readonly memory).
|
|
* It is only safe to use when the result will not be modified, but API
|
|
* design or language restrictions prevent you from declaring that
|
|
* (e.g. because a function returns both const and non-const variables).
|
|
*
|
|
* Note that this only works in function scope, not for global variables (it'd
|
|
* be nice, but not trivial, to improve that).
|
|
*/
|
|
#if defined(HAVE__BUILTIN_TYPES_COMPATIBLE_P)
|
|
#define unconstify(underlying_type, expr) \
|
|
(StaticAssertExpr(__builtin_types_compatible_p(__typeof(expr), const underlying_type), \
|
|
"wrong cast"), \
|
|
(underlying_type) (expr))
|
|
#define unvolatize(underlying_type, expr) \
|
|
(StaticAssertExpr(__builtin_types_compatible_p(__typeof(expr), volatile underlying_type), \
|
|
"wrong cast"), \
|
|
(underlying_type) (expr))
|
|
#else
|
|
#define unconstify(underlying_type, expr) \
|
|
((underlying_type) (expr))
|
|
#define unvolatize(underlying_type, expr) \
|
|
((underlying_type) (expr))
|
|
#endif
|
|
|
|
/* ----------------------------------------------------------------
|
|
* Section 9: system-specific hacks
|
|
*
|
|
* This should be limited to things that absolutely have to be
|
|
* included in every source file. The port-specific header file
|
|
* is usually a better place for this sort of thing.
|
|
* ----------------------------------------------------------------
|
|
*/
|
|
|
|
/*
|
|
* NOTE: this is also used for opening text files.
|
|
* WIN32 treats Control-Z as EOF in files opened in text mode.
|
|
* Therefore, we open files in binary mode on Win32 so we can read
|
|
* literal control-Z. The other affect is that we see CRLF, but
|
|
* that is OK because we can already handle those cleanly.
|
|
*/
|
|
#if defined(WIN32) || defined(__CYGWIN__)
|
|
#define PG_BINARY O_BINARY
|
|
#define PG_BINARY_A "ab"
|
|
#define PG_BINARY_R "rb"
|
|
#define PG_BINARY_W "wb"
|
|
#else
|
|
#define PG_BINARY 0
|
|
#define PG_BINARY_A "a"
|
|
#define PG_BINARY_R "r"
|
|
#define PG_BINARY_W "w"
|
|
#endif
|
|
|
|
/*
|
|
* Provide prototypes for routines not present in a particular machine's
|
|
* standard C library.
|
|
*/
|
|
|
|
#if defined(HAVE_FDATASYNC) && !HAVE_DECL_FDATASYNC
|
|
extern int fdatasync(int fildes);
|
|
#endif
|
|
|
|
/* Older platforms may provide strto[u]ll functionality under other names */
|
|
#if !defined(HAVE_STRTOLL) && defined(HAVE___STRTOLL)
|
|
#define strtoll __strtoll
|
|
#define HAVE_STRTOLL 1
|
|
#endif
|
|
|
|
#if !defined(HAVE_STRTOLL) && defined(HAVE_STRTOQ)
|
|
#define strtoll strtoq
|
|
#define HAVE_STRTOLL 1
|
|
#endif
|
|
|
|
#if !defined(HAVE_STRTOULL) && defined(HAVE___STRTOULL)
|
|
#define strtoull __strtoull
|
|
#define HAVE_STRTOULL 1
|
|
#endif
|
|
|
|
#if !defined(HAVE_STRTOULL) && defined(HAVE_STRTOUQ)
|
|
#define strtoull strtouq
|
|
#define HAVE_STRTOULL 1
|
|
#endif
|
|
|
|
#if defined(HAVE_STRTOLL) && !HAVE_DECL_STRTOLL
|
|
extern long long strtoll(const char *str, char **endptr, int base);
|
|
#endif
|
|
|
|
#if defined(HAVE_STRTOULL) && !HAVE_DECL_STRTOULL
|
|
extern unsigned long long strtoull(const char *str, char **endptr, int base);
|
|
#endif
|
|
|
|
#if !defined(HAVE_MEMMOVE) && !defined(memmove)
|
|
#define memmove(d, s, c) bcopy(s, d, c)
|
|
#endif
|
|
|
|
/* no special DLL markers on most ports */
|
|
#ifndef PGDLLIMPORT
|
|
#define PGDLLIMPORT
|
|
#endif
|
|
#ifndef PGDLLEXPORT
|
|
#define PGDLLEXPORT
|
|
#endif
|
|
|
|
/*
|
|
* The following is used as the arg list for signal handlers. Any ports
|
|
* that take something other than an int argument should override this in
|
|
* their pg_config_os.h file. Note that variable names are required
|
|
* because it is used in both the prototypes as well as the definitions.
|
|
* Note also the long name. We expect that this won't collide with
|
|
* other names causing compiler warnings.
|
|
*/
|
|
|
|
#ifndef SIGNAL_ARGS
|
|
#define SIGNAL_ARGS int postgres_signal_arg
|
|
#endif
|
|
|
|
/*
|
|
* When there is no sigsetjmp, its functionality is provided by plain
|
|
* setjmp. Incidentally, nothing provides setjmp's functionality in
|
|
* that case. We now support the case only on Windows.
|
|
*/
|
|
#ifdef WIN32
|
|
#define sigjmp_buf jmp_buf
|
|
#define sigsetjmp(x,y) setjmp(x)
|
|
#define siglongjmp longjmp
|
|
#endif
|
|
|
|
/* EXEC_BACKEND defines */
|
|
#ifdef EXEC_BACKEND
|
|
#define NON_EXEC_STATIC
|
|
#else
|
|
#define NON_EXEC_STATIC static
|
|
#endif
|
|
|
|
/* /port compatibility functions */
|
|
#include "port.h"
|
|
|
|
#endif /* C_H */
|