+++ /dev/null
-/* Copyright (C) 2002,2003,2004,2006,2007,2009 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, see
- <http://www.gnu.org/licenses/>. */
-
-#include <sysdep.h>
-#include <lowlevellock.h>
-#include <lowlevelcond.h>
-#include <bits/kernel-features.h>
-#include <pthread-pi-defines.h>
-#include <pthread-errnos.h>
-#include <tls.h>
-
- .text
-
- /* int pthread_cond_broadcast (pthread_cond_t *cond) */
- .globl __pthread_cond_broadcast
- .type __pthread_cond_broadcast, @function
- .protected __pthread_cond_broadcast
- .align 16
-__pthread_cond_broadcast:
- cfi_startproc
- pushl %ebx
- cfi_adjust_cfa_offset(4)
- cfi_rel_offset(%ebx, 0)
- pushl %esi
- cfi_adjust_cfa_offset(4)
- cfi_rel_offset(%esi, 0)
- pushl %edi
- cfi_adjust_cfa_offset(4)
- cfi_rel_offset(%edi, 0)
- pushl %ebp
- cfi_adjust_cfa_offset(4)
- cfi_rel_offset(%ebp, 0)
- cfi_remember_state
-
- movl 20(%esp), %ebx
-
- /* Get internal lock. */
- movl $1, %edx
- xorl %eax, %eax
- LOCK
-#if cond_lock == 0
- cmpxchgl %edx, (%ebx)
-#else
- cmpxchgl %edx, cond_lock(%ebx)
-#endif
- jnz 1f
-
-2: addl $cond_futex, %ebx
- movl total_seq+4-cond_futex(%ebx), %eax
- movl total_seq-cond_futex(%ebx), %ebp
- cmpl wakeup_seq+4-cond_futex(%ebx), %eax
- ja 3f
- jb 4f
- cmpl wakeup_seq-cond_futex(%ebx), %ebp
- jna 4f
-
- /* Cause all currently waiting threads to recognize they are
- woken up. */
-3: movl %ebp, wakeup_seq-cond_futex(%ebx)
- movl %eax, wakeup_seq-cond_futex+4(%ebx)
- movl %ebp, woken_seq-cond_futex(%ebx)
- movl %eax, woken_seq-cond_futex+4(%ebx)
- addl %ebp, %ebp
- addl $1, broadcast_seq-cond_futex(%ebx)
- movl %ebp, (%ebx)
-
- /* Get the address of the mutex used. */
- movl dep_mutex-cond_futex(%ebx), %edi
-
- /* Unlock. */
- LOCK
- subl $1, cond_lock-cond_futex(%ebx)
- jne 7f
-
- /* Don't use requeue for pshared condvars. */
-8: cmpl $-1, %edi
- je 9f
-
- /* Do not use requeue for pshared condvars. */
- testl $PS_BIT, MUTEX_KIND(%edi)
- jne 9f
-
- /* Requeue to a non-robust PI mutex if the PI bit is set and
- the robust bit is not set. */
- movl MUTEX_KIND(%edi), %eax
- andl $(ROBUST_BIT|PI_BIT), %eax
- cmpl $PI_BIT, %eax
- je 81f
-
- /* Wake up all threads. */
-#ifdef __ASSUME_PRIVATE_FUTEX
- movl $(FUTEX_CMP_REQUEUE|FUTEX_PRIVATE_FLAG), %ecx
-#else
- movl %gs:PRIVATE_FUTEX, %ecx
- orl $FUTEX_CMP_REQUEUE, %ecx
-#endif
- movl $SYS_futex, %eax
- movl $0x7fffffff, %esi
- movl $1, %edx
- /* Get the address of the futex involved. */
-# if MUTEX_FUTEX != 0
- addl $MUTEX_FUTEX, %edi
-# endif
-/* FIXME: Until Ingo fixes 4G/4G vDSO, 6 arg syscalls are broken for sysenter.
- ENTER_KERNEL */
- int $0x80
-
- /* For any kind of error, which mainly is EAGAIN, we try again
- with WAKE. The general test also covers running on old
- kernels. */
- cmpl $0xfffff001, %eax
- jae 9f
-
-6: xorl %eax, %eax
- popl %ebp
- cfi_adjust_cfa_offset(-4)
- cfi_restore(%ebp)
- popl %edi
- cfi_adjust_cfa_offset(-4)
- cfi_restore(%edi)
- popl %esi
- cfi_adjust_cfa_offset(-4)
- cfi_restore(%esi)
- popl %ebx
- cfi_adjust_cfa_offset(-4)
- cfi_restore(%ebx)
- ret
-
- cfi_restore_state
-
-81: movl $(FUTEX_CMP_REQUEUE_PI|FUTEX_PRIVATE_FLAG), %ecx
- movl $SYS_futex, %eax
- movl $0x7fffffff, %esi
- movl $1, %edx
- /* Get the address of the futex involved. */
-# if MUTEX_FUTEX != 0
- addl $MUTEX_FUTEX, %edi
-# endif
- int $0x80
-
- /* For any kind of error, which mainly is EAGAIN, we try again
- with WAKE. The general test also covers running on old
- kernels. */
- cmpl $0xfffff001, %eax
- jb 6b
- jmp 9f
-
- /* Initial locking failed. */
-1:
-#if cond_lock == 0
- movl %ebx, %edx
-#else
- leal cond_lock(%ebx), %edx
-#endif
-#if (LLL_SHARED-LLL_PRIVATE) > 255
- xorl %ecx, %ecx
-#endif
- cmpl $-1, dep_mutex(%ebx)
- setne %cl
- subl $1, %ecx
- andl $(LLL_SHARED-LLL_PRIVATE), %ecx
-#if LLL_PRIVATE != 0
- addl $LLL_PRIVATE, %ecx
-#endif
- call __lll_lock_wait
- jmp 2b
-
- .align 16
- /* Unlock. */
-4: LOCK
- subl $1, cond_lock-cond_futex(%ebx)
- je 6b
-
- /* Unlock in loop requires wakeup. */
-5: leal cond_lock-cond_futex(%ebx), %eax
-#if (LLL_SHARED-LLL_PRIVATE) > 255
- xorl %ecx, %ecx
-#endif
- cmpl $-1, dep_mutex-cond_futex(%ebx)
- setne %cl
- subl $1, %ecx
- andl $(LLL_SHARED-LLL_PRIVATE), %ecx
-#if LLL_PRIVATE != 0
- addl $LLL_PRIVATE, %ecx
-#endif
- call __lll_unlock_wake
- jmp 6b
-
- /* Unlock in loop requires wakeup. */
-7: leal cond_lock-cond_futex(%ebx), %eax
-#if (LLL_SHARED-LLL_PRIVATE) > 255
- xorl %ecx, %ecx
-#endif
- cmpl $-1, dep_mutex-cond_futex(%ebx)
- setne %cl
- subl $1, %ecx
- andl $(LLL_SHARED-LLL_PRIVATE), %ecx
-#if LLL_PRIVATE != 0
- addl $LLL_PRIVATE, %ecx
-#endif
- call __lll_unlock_wake
- jmp 8b
-
-9: /* The futex requeue functionality is not available. */
- movl $0x7fffffff, %edx
-#if FUTEX_PRIVATE_FLAG > 255
- xorl %ecx, %ecx
-#endif
- cmpl $-1, dep_mutex-cond_futex(%ebx)
- sete %cl
- subl $1, %ecx
-#ifdef __ASSUME_PRIVATE_FUTEX
- andl $FUTEX_PRIVATE_FLAG, %ecx
-#else
- andl %gs:PRIVATE_FUTEX, %ecx
-#endif
- addl $FUTEX_WAKE, %ecx
- movl $SYS_futex, %eax
- ENTER_KERNEL
- jmp 6b
- cfi_endproc
- .size __pthread_cond_broadcast, .-__pthread_cond_broadcast
-weak_alias(__pthread_cond_broadcast, pthread_cond_broadcast)
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