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Code Issues Releases Wiki Activity

s_lock patch from Ryan.

This commit is contained in:
Bruce Momjian 1998-10-31 02:06:08 +00:00
parent 47ea32f7d4
commit 2e18525dbe
1 changed files with 9 additions and 9 deletions
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18
src/include/storage/s_lock.h
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/include/storage/s_lock.h,v 1.55 1998/10/28 15:58:34 momjian Exp $
* $Header: /cvsroot/pgsql/src/include/storage/s_lock.h,v 1.56 1998/10/31 02:06:08 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -86,18 +86,18 @@ tas(volatile slock_t *lock)
register slock_t _res;
__asm__(" ldq $0, %0 \n\
bne $0, already_set \n\
bne $0, 3f \n\
ldq_l $0, %0 \n\
bne $0, already_set \n\
bne $0, 3f \n\
or $31, 1, $0 \n\
stq_c $0, %0 \n\
beq $0, stqc_fail \n\
success: bis $31, $31, %1 \n\
beq $0, 2f \n\
bis $31, $31, %1 \n\
mb \n\
jmp $31, end \n\
stqc_fail: or $31, 1, $0 \n\
already_set: bis $0, $0, %1 \n\
end: nop ": "=m"(*lock), "=r"(_res): :"0");
jmp $31, 4f \n\
2: or $31, 1, $0 \n\
3: bis $0, $0, %1 \n\
4: nop ": "=m"(*lock), "=r"(_res): :"0");
return (int) _res;
}