diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h index 8e1742b671..136dc574e0 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.h @@ -102,6 +102,25 @@ extern int __lll_mutex_unlock_wait (int *__futex) attribute_hidden; : "0" (1), "2" (futex) \ : "cx", "r11", "cc", "memory"); }) + +#define lll_mutex_cond_lock(futex) \ + (void) ({ int ignore1, ignore2; \ + __asm __volatile (LOCK_INSTR "xaddl %0, %2\n\t" \ + "testl %0, %0\n\t" \ + "jne 1f\n\t" \ + ".subsection 1\n" \ + "1:\tleaq %2, %%rdi\n\t" \ + "subq $128, %%rsp\n\t" \ + "callq __lll_mutex_lock_wait\n\t" \ + "addq $128, %%rsp\n\t" \ + "jmp 2f\n\t" \ + ".previous\n" \ + "2:" \ + : "=S" (ignore1), "=&D" (ignore2), "=m" (futex) \ + : "0" (2), "2" (futex) \ + : "cx", "r11", "cc", "memory"); }) + + #define lll_mutex_timedlock(futex, timeout) \ ({ int result, ignore1, ignore2, ignore3; \ __asm __volatile (LOCK_INSTR "xaddl %0, %4\n\t" \ |