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On architectures where we don't have any special inline code for 

GCC, the inner "#if defined(__GNUC__)" can just be omitted in that
architecture's block.

The existing arrangement with an outer "#if defined(__GNUC__)"
doesn't have any obvious benefit, and it encourages missed cases
like this one.


BTW, I'd suggest making the definition of clear_lock for HPUX be

static const slock_t clear_lock = {{-1, -1, -1, -1}};

The extra braces are needed to suppress warnings from gcc, and
declaring it const just seems like good practice.

			regards, tom lane
This commit is contained in:
Bruce Momjian 1998-07-18 14:51:10 +00:00
parent b47466482f
commit a93f397423
1 changed files with 16 additions and 19 deletions
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35
src/include/storage/s_lock.h
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/include/storage/s_lock.h,v 1.37 1998/07/18 14:38:12 momjian Exp $
* $Header: /cvsroot/pgsql/src/include/storage/s_lock.h,v 1.38 1998/07/18 14:51:10 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -230,24 +230,6 @@ tas(volatile slock_t *lock)
#if defined(__hpux)
/*
* HP-UX (PA-RISC)
*
* Note that slock_t on PA-RISC is a structure instead of char
* (see storage/ipc.h).
*
* a "set" slock_t has a single word cleared. a "clear" slock_t has
* all words set to non-zero. tas() in tas.s
*/
static slock_t clear_lock =
{-1, -1, -1, -1};
#define S_UNLOCK(lock) (*(lock) = clear_lock) /* struct assignment */
#define S_LOCK_FREE(lock) ( *(int *) (((long) (lock) + 15) & ~15) != 0)
#endif /* __hpux */
#if defined(NEED_I386_TAS_ASM)
/* non gcc i386 based things */
@ -277,7 +259,22 @@ tas(slock_t *s_lock)
#endif /* else defined(__GNUC__) */
#if defined(__hpux)
/*
* HP-UX (PA-RISC)
*
* Note that slock_t on PA-RISC is a structure instead of char
* (see storage/ipc.h).
*
* a "set" slock_t has a single word cleared. a "clear" slock_t has
* all words set to non-zero. tas() in tas.s
*/
static const slock_t clear_lock =
{{-1, -1, -1, -1}};
#define S_UNLOCK(lock) (*(lock) = clear_lock) /* struct assignment */
#define S_LOCK_FREE(lock) ( *(int *) (((long) (lock) + 15) & ~15) != 0)
#endif /* __hpux */
/****************************************************************************