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authorRoland McGrath <roland@hack.frob.com>2014-05-14 13:37:40 -0700
committerRoland McGrath <roland@hack.frob.com>2014-05-14 13:37:40 -0700
commit348f8e8c26178d7e5b7b64c16ab5c1a773916781 (patch)
treee155c8e2bbf1f549127d7b9a40ed33f7926e2b1c /sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S
parent5085af05bdfd7b4656abdd79e7da50022e3e1cad (diff)
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Move remaining nptl/sysdeps/unix/sysv/linux/i386/ files.
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S')
-rw-r--r--sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S241
1 files changed, 241 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S b/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S
new file mode 100644
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--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/i486/pthread_cond_broadcast.S
@@ -0,0 +1,241 @@
+/* Copyright (C) 2002-2014 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 <shlib-compat.h>
+#include <lowlevellock.h>
+#include <lowlevelcond.h>
+#include <kernel-features.h>
+#include <pthread-pi-defines.h>
+#include <pthread-errnos.h>
+#include <stap-probe.h>
+
+	.text
+
+	/* int pthread_cond_broadcast (pthread_cond_t *cond) */
+	.globl	__pthread_cond_broadcast
+	.type	__pthread_cond_broadcast, @function
+	.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
+
+	LIBC_PROBE (cond_broadcast, 1, %edx)
+
+	/* 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
+versioned_symbol (libpthread, __pthread_cond_broadcast, pthread_cond_broadcast,
+		  GLIBC_2_3_2)