diff options
| 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/i386/i486/pthread_cond_broadcast.S | |
| parent | 6a998b09ec734d8dd40e690244122a43bf9d7a16 (diff) | |
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/i386/i486/pthread_cond_broadcast.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S | 39 |
1 files changed, 36 insertions, 3 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S index 0fa402a95e..06821ad376 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/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 240 #define FUTEX_WAIT 0 #define FUTEX_WAKE 1 +#define FUTEX_REQUEUE 3 + +#define EINVAL 22 .text @@ -41,8 +45,10 @@ __pthread_cond_broadcast: pushl %ebx + pushl %esi + pushl %edi - movl 8(%esp), %ebx + movl 16(%esp), %ebx /* Get internal lock. */ movl $1, %eax @@ -69,18 +75,34 @@ __pthread_cond_broadcast: 3: movl %ecx, (%ebx) movl %eax, 4(%ebx) + /* Get the address of the mutex used. */ + movl dep_mutex-wakeup_seq(%ebx), %edi + /* Unlock. */ LOCK subl $1, cond_lock-wakeup_seq(%ebx) jne 7f /* Wake up all threads. */ -8: movl $FUTEX_WAKE, %ecx +8: movl $FUTEX_REQUEUE, %ecx movl $SYS_futex, %eax - movl $0x7fffffff, %edx + movl $0x7fffffff, %esi + movl $1, %edx + /* Get the address of the futex involved. */ +# if MUTEX_FUTEX != 0 + addl $MUTEX_FUTEX, %edi +# endif ENTER_KERNEL +#ifndef __ASSUME_FUTEX_REQUEUE + cmpl $-EINVAL, %eax + je 9f +10: +#endif + xorl %eax, %eax + popl %edi + popl %esi popl %ebx ret @@ -91,6 +113,8 @@ __pthread_cond_broadcast: jne 5f 6: xorl %eax, %eax + popl %edi + popl %esi popl %ebx ret @@ -113,6 +137,15 @@ __pthread_cond_broadcast: 7: leal cond_lock-wakeup_seq(%ebx), %eax call __lll_mutex_unlock_wake jmp 8b + +#ifndef __ASSUME_FUTEX_REQUEUE +9: /* The futex requeue functionality is not available. */ + movl $0x7fffffff, %edx + movl $FUTEX_WAKE, %ecx + movl $SYS_futex, %eax + ENTER_KERNEL + jmp 10b +#endif .size __pthread_cond_broadcast, .-__pthread_cond_broadcast versioned_symbol (libpthread, __pthread_cond_broadcast, pthread_cond_broadcast, GLIBC_2_3_2) |