diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S | 29 |
1 files changed, 24 insertions, 5 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 2fc9d1fad7..8f65f2cd69 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 @@ -55,10 +55,20 @@ __pthread_cond_signal: addl $1, (%rdi) /* Wake up one thread. */ - movl $FUTEX_WAKE_OP, %esi - movl $SYS_futex, %eax + cmpq $-1, dep_mutex(%r8) movl $1, %edx +#ifdef __ASSUME_PRIVATE_FUTEX + movl $FUTEX_WAKE_OP, %eax + movl $(FUTEX_WAKE_OP|FUTEX_PRIVATE_FLAG), %esi + cmove %eax, %esi +#else + movl $0, %eax + movl %fs:PRIVATE_FUTEX, %esi + cmove %eax, %esi + orl $FUTEX_WAKE_OP, %esi +#endif movl $1, %r10d + movl $SYS_futex, %eax #if cond_lock != 0 addq $cond_lock, %r8 #endif @@ -75,7 +85,9 @@ __pthread_cond_signal: xorl %eax, %eax retq -7: movl $FUTEX_WAKE, %esi +7: /* %esi should be either FUTEX_WAKE_OP or + FUTEX_WAKE_OP|FUTEX_PRIVATE_FLAG from the previous syscall. */ + xorl $(FUTEX_WAKE ^ FUTEX_WAKE_OP), %esi movl $SYS_futex, %eax /* %rdx should be 1 already from $FUTEX_WAKE_OP syscall. movl $1, %edx */ @@ -98,8 +110,10 @@ __pthread_cond_signal: #if cond_lock != 0 addq $cond_lock, %rdi #endif - /* XYZ */ + cmpq $-1, dep_mutex-cond_lock(%rdi) + movl $LLL_PRIVATE, %eax movl $LLL_SHARED, %esi + cmovne %eax, %esi callq __lll_lock_wait #if cond_lock != 0 subq $cond_lock, %rdi @@ -109,8 +123,13 @@ __pthread_cond_signal: /* Unlock in loop requires wakeup. */ 5: movq %r8, %rdi - /* XYZ */ +#if cond_lock != 0 + addq $cond_lock, %rdi +#endif + cmpq $-1, dep_mutex-cond_lock(%rdi) + movl $LLL_PRIVATE, %eax movl $LLL_SHARED, %esi + cmovne %eax, %esi callq __lll_unlock_wake jmp 6b .size __pthread_cond_signal, .-__pthread_cond_signal |