diff options
Diffstat (limited to 'db2/mutex/x86.gcc')
| -rw-r--r-- | db2/mutex/x86.gcc | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/db2/mutex/x86.gcc b/db2/mutex/x86.gcc new file mode 100644 index 0000000000..886a6811a2 --- /dev/null +++ b/db2/mutex/x86.gcc @@ -0,0 +1,17 @@ +/* + * @(#)x86.gcc 10.2 (Sleepycat) 6/21/97 + * + * For gcc/x86, 0 is clear, 1 is set. + */ +#define TSL_SET(tsl) ({ \ + register tsl_t *__l = (tsl); \ + int __r; \ + asm volatile("movl $1,%%eax; xchgb %1,%%al; xorl $1,%%eax" \ + : "=&a" (__r), "=m" (*__l) \ + : "1" (*__l) \ + ); \ + __r & 1; \ +}) + +#define TSL_UNSET(tsl) (*(tsl) = 0) +#define TSL_INIT(tsl) TSL_UNSET(tsl) |