diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S | 49 |
1 files changed, 45 insertions, 4 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S index 3fe7f8c17a..d282785151 100644 --- a/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S +++ b/nptl/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_wait.S @@ -80,6 +80,7 @@ __pthread_cond_wait: addl $1, total_seq(%ebx) adcl $0, total_seq+4(%ebx) addl $1, cond_futex(%ebx) + addl $(1 << clock_bits), cond_nwaiters(%ebx) #define FRAME_SIZE 16 subl $FRAME_SIZE, %esp @@ -156,7 +157,25 @@ __pthread_cond_wait: adcl $0, woken_seq+4(%ebx) /* Unlock */ -16: LOCK +16: subl $(1 << clock_bits), cond_nwaiters(%ebx) + + /* Wake up a thread which wants to destroy the condvar object. */ + movl total_seq(%ebx), %eax + andl total_seq+4(%ebx), %eax + cmpl $0xffffffff, %eax + jne 17f + movl cond_nwaiters(%ebx), %eax + andl $~((1 << clock_bits) - 1), %eax + jne 17f + + addl $cond_nwaiters, %ebx + movl $SYS_futex, %eax + movl $FUTEX_WAKE, %ecx + movl $1, %edx + ENTER_KERNEL + subl $cond_nwaiters, %ebx + +17: LOCK #if cond_lock == 0 subl $1, (%ebx) #else @@ -286,7 +305,27 @@ __condvar_w_cleanup: addl $1, woken_seq(%ebx) adcl $0, woken_seq+4(%ebx) -3: LOCK +3: subl $(1 << clock_bits), cond_nwaiters(%ebx) + + /* Wake up a thread which wants to destroy the condvar object. */ + xorl %edi, %edi + movl total_seq(%ebx), %eax + andl total_seq+4(%ebx), %eax + cmpl $0xffffffff, %eax + jne 4f + movl cond_nwaiters(%ebx), %eax + andl $~((1 << clock_bits) - 1), %eax + jne 4f + + addl $cond_nwaiters, %ebx + movl $SYS_futex, %eax + movl $FUTEX_WAKE, %ecx + movl $1, %edx + ENTER_KERNEL + subl $cond_nwaiters, %ebx + movl $1, %edi + +4: LOCK #if cond_lock == 0 subl $1, (%ebx) #else @@ -302,13 +341,15 @@ __condvar_w_cleanup: call __lll_mutex_unlock_wake /* Wake up all waiters to make sure no signal gets lost. */ -2: addl $cond_futex, %ebx +2: testl %edi, %edi + jnz 5f + addl $cond_futex, %ebx movl $FUTEX_WAKE, %ecx movl $SYS_futex, %eax movl $0x7fffffff, %edx ENTER_KERNEL - movl 20+FRAME_SIZE(%esp), %eax +5: movl 20+FRAME_SIZE(%esp), %eax call __pthread_mutex_cond_lock movl %esi, (%esp) |