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| author | Ulrich Drepper <drepper@redhat.com> | 2005-09-08 17:41:56 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2005-09-08 17:41:56 +0000 |
| commit | a3615024b9b204a124429a73d82827b189faaada (patch) | |
| tree | 25d30717a99ee9950d0c6207ffc599fe4ad3eb49 /nptl/sysdeps/unix/sysv/linux/x86_64 | |
| parent | b9b8cf036684d69a1bac70cb604ad7dd4c31b8c4 (diff) | |
| download | glibc-a3615024b9b204a124429a73d82827b189faaada.tar glibc-a3615024b9b204a124429a73d82827b189faaada.tar.gz glibc-a3615024b9b204a124429a73d82827b189faaada.tar.bz2 glibc-a3615024b9b204a124429a73d82827b189faaada.zip | |
* sysdeps/unix/sysv/linux/powerpc/lowlevellock.h (FUTEX_WAKE_OP,
FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
(lll_futex_wake_unlock): Define.
* sysdeps/unix/sysv/linux/alpha/lowlevellock.h (FUTEX_WAKE_OP,
FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
(lll_futex_wake_unlock): Define.
* sysdeps/unix/sysv/linux/ia64/lowlevellock.h (FUTEX_WAKE_OP,
FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
(lll_futex_wake_unlock): Define.
* sysdeps/unix/sysv/linux/s390/lowlevellock.h (FUTEX_WAKE_OP,
FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
(lll_futex_wake_unlock): Define.
* sysdeps/unix/sysv/linux/sparc/lowlevellock.h (FUTEX_WAKE_OP,
FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
(lll_futex_wake_unlock): Define.
* sysdeps/pthread/pthread_cond_signal.c (__pthread_cond_signal): Use
lll_futex_wake_unlock.
* sysdeps/unix/sysv/linux/i386/i486/pthread_cond_signal.S
(FUTEX_WAKE_OP, FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
(__pthread_cond_signal): Use FUTEX_WAKE_OP.
* sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S
(FUTEX_WAKE_OP, FUTEX_OP_CLEAR_WAKE_IF_GT_ONE): Define.
(__pthread_cond_signal): Use FUTEX_WAKE_OP.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S index de9e109f45..3dbb9e81e3 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S @@ -31,7 +31,9 @@ #define SYS_futex 202 #define FUTEX_WAIT 0 #define FUTEX_WAKE 1 -#define FUTEX_REQUEUE 3 +#define FUTEX_WAKE_OP 5 + +#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1) #define EINVAL 22 @@ -66,9 +68,30 @@ __pthread_cond_signal: addl $1, (%rdi) /* Wake up one thread. */ - movl $FUTEX_WAKE, %esi + movl $FUTEX_WAKE_OP, %esi movl $SYS_futex, %eax movl $1, %edx + movl $1, %r10d +#if cond_lock != 0 + addq $cond_lock, %r8 +#endif + movl $FUTEX_OP_CLEAR_WAKE_IF_GT_ONE, %r9d + syscall +#if cond_lock != 0 + subq $cond_lock, %r8 +#endif + /* For any kind of error, we try again with WAKE. + The general test also covers running on old kernels. */ + cmpq $-4095, %rax + jae 7f + + xorl %eax, %eax + retq + +7: movl $FUTEX_WAKE, %esi + movl $SYS_futex, %eax + /* %rdx should be 1 already from $FUTEX_WAKE_OP syscall. + movl $1, %edx */ syscall /* Unlock. */ |