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| author | Ulrich Drepper <drepper@redhat.com> | 2003-05-26 02:47:39 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2003-05-26 02:47:39 +0000 |
| commit | 69431c9a21f7393f34330a27df1630520930789e (patch) | |
| tree | 1fbd3f1520502c833e676afa3fb5410f92654f85 /nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S | |
| parent | 6a998b09ec734d8dd40e690244122a43bf9d7a16 (diff) | |
| download | glibc-69431c9a21f7393f34330a27df1630520930789e.tar.gz glibc-69431c9a21f7393f34330a27df1630520930789e.tar.xz glibc-69431c9a21f7393f34330a27df1630520930789e.zip | |
Update.
2003-05-25 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/kernel-features.h: Define __ASSUME_FUTEX_REQUEUE for >= 2.5.70. * math/test-fenv.c (feexcp_nomask_test): Fix comment.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S index cc12f5407c..66edb9ac85 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S @@ -20,6 +20,7 @@ #include <sysdep.h> #include <shlib-compat.h> #include <lowlevelcond.h> +#include <kernel-features.h> #ifdef UP # define LOCK @@ -30,6 +31,9 @@ #define SYS_futex 202 #define FUTEX_WAIT 0 #define FUTEX_WAKE 1 +#define FUTEX_REQUEUE 3 + +#define EINVAL 22 .text @@ -60,17 +64,27 @@ __pthread_cond_broadcast: woken up. */ movq %rcx, (%rdi) + /* Get the address of the mutex used. */ + movq dep_mutex-wakeup_seq(%rdi), %r8 + /* Unlock. */ LOCK decl cond_lock-wakeup_seq(%rdi) jne 7f /* Wake up all threads. */ -8: movq $FUTEX_WAKE, %rsi +8: movq $FUTEX_REQUEUE, %rsi movq $SYS_futex, %rax - movl $0x7fffffff, %edx + movl $1, %edx + movq $0x7fffffff, %r10 syscall +#ifndef __ASSUME_FUTEX_REQUEUE + cmpq $-EINVAL, %eax + je 9f +10: +#endif + xorl %eax, %eax retq @@ -104,6 +118,15 @@ __pthread_cond_broadcast: callq __lll_mutex_unlock_wake subq $cond_lock-wakeup_seq, %rdi jmp 8b + +#ifndef __ASSUME_FUTEX_REQUEUE +9: /* The futex requeue functionality is not available. */ + movq $0x7fffffff, %rdx + movq $FUTEX_WAKE, %rsi + movq $SYS_futex, %rax + syscall + jmp 10b +#endif .size __pthread_cond_broadcast, .-__pthread_cond_broadcast versioned_symbol (libpthread, __pthread_cond_broadcast, pthread_cond_broadcast, GLIBC_2_3_2) |