diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S | 34 |
1 files changed, 22 insertions, 12 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S index f5de0a280c..969e80da2a 100644 --- a/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S +++ b/nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -67,9 +67,15 @@ __condvar_cleanup: cmpl 4(%r8), %edx jne 3f + /* We increment the wakeup_seq counter only if it is lower than + total_seq. If this is not the case the thread was woken and + then canceled. In this case we ignore the signal. */ + movq total_seq(%rdi), %rax + cmpq wakeup_seq(%rdi), %rax + jbe 6f incq wakeup_seq(%rdi) - incq woken_seq(%rdi) incl cond_futex(%rdi) +6: incq woken_seq(%rdi) 3: subl $(1 << clock_bits), cond_nwaiters(%rdi) @@ -82,12 +88,12 @@ __condvar_cleanup: jne 4f addq $cond_nwaiters, %rdi - movq $SYS_futex, %rax - movq $FUTEX_WAKE, %rsi + movl $SYS_futex, %eax + movl $FUTEX_WAKE, %esi movl $1, %edx syscall subq $cond_nwaiters, %rdi - movq $1, %r12 + movl $1, %r12d 4: LOCK #if cond_lock == 0 @@ -105,9 +111,9 @@ __condvar_cleanup: 2: testq %r12, %r12 jnz 5f addq $cond_futex, %rdi - movq $FUTEX_WAKE, %rsi + movl $FUTEX_WAKE, %esi movl $0x7fffffff, %edx - movq $SYS_futex, %rax + movl $SYS_futex, %eax syscall 5: movq 16(%r8), %rdi @@ -170,7 +176,7 @@ __pthread_cond_wait: /* Unlock the mutex. */ 2: movq 16(%rsp), %rdi - xorq %rsi, %rsi + xorl %esi, %esi callq __pthread_mutex_unlock_usercnt testl %eax, %eax @@ -215,8 +221,12 @@ __pthread_cond_wait: xorq %r10, %r10 movq %r12, %rdx addq $cond_futex-cond_lock, %rdi - movq $SYS_futex, %rax - movq %r10, %rsi /* movq $FUTEX_WAIT, %rsi */ + movl $SYS_futex, %eax +#if FUTEX_WAIT == 0 + xorl %esi, %esi +#else + movl $FUTEX_WAIT, %esi +#endif syscall movl (%rsp), %edi @@ -262,8 +272,8 @@ __pthread_cond_wait: jne 17f addq $cond_nwaiters, %rdi - movq $SYS_futex, %rax - movq $FUTEX_WAKE, %rsi + movl $SYS_futex, %eax + movl $FUTEX_WAKE, %esi movl $1, %edx syscall subq $cond_nwaiters, %rdi |