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modified i386_solaris port 

submitted by: dr. george
This commit is contained in:
Marc G. Fournier 1996-07-25 19:48:24 +00:00
parent 31cae34d07
commit 14cd0ca3bd
2 changed files with 37 additions and 2 deletions
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4
src/backend/port/i386_solaris/Makefile.inc
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@ -7,7 +7,7 @@
#
#
# IDENTIFICATION
# $Header: /cvsroot/pgsql/src/backend/port/i386_solaris/Attic/Makefile.inc,v 1.3 1996/07/25 07:27:08 scrappy Exp $
# $Header: /cvsroot/pgsql/src/backend/port/i386_solaris/Attic/Makefile.inc,v 1.4 1996/07/25 19:48:24 scrappy Exp $
#
#-------------------------------------------------------------------------
@ -15,6 +15,6 @@ CFLAGS+= -DUSE_POSIX_TIME -DNEED_ISINF -DNEED_RUSAGE -DNO_EMPTY_STMTS
LDADD+= -ll -ldl
SUBSRCS+= port.c
SUBSRCS+= port.c tas.s
HEADERS+= machine.h port-protos.h rusagestub.h

35
src/backend/port/i386_solaris/tas.s Normal file
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@ -0,0 +1,35 @@
/=============================================================================
/ tas.s -- test and set lock for i386_solaris
/=============================================================================
.file "tas.s"
.text
.align 16
.L1.text:
.globl tas
tas:
pushl %ebp /save prev base pointer
movl %esp,%ebp /new base pointer
pushl %ebx /save prev bx
movl 8(%ebp),%ebx /load bx with address of lock
pushl %ebx /save prev bx
movl 8(%ebp),%ebx /load bx with address of lock
movl $255,%eax /put something in ax
xchgb %al,(%ebx) /swap lock value with "0"
cmpb $0,%al /did we get the lock?
jne .Locked
subl %eax,%eax /yes, we got it -- return 0
jmp .Finish
.align 4
.Locked:
movl $1,%eax /no, we didn't get it - return 1
.Finish:
popl %ebx /restore prev bx
movl %ebp,%esp /restore stack state
popl %ebp
ret /return
.align 4
.type tas,@function
.size tas,.-tas