b274130206
[BZ #19490] * sysdeps/unix/sysv/linux/x86_64/pthread_cond_broadcast.S (pthread_cond_broadcast): Use ENTRY/END * sysdeps/unix/sysv/linux/x86_64/pthread_cond_signal.S (pthread_cond_signal): Likewise * sysdeps/x86_64/nptl/pthread_spin_lock.S (pthread_spin_lock): Likewise * sysdeps/x86_64/nptl/pthread_spin_trylock.S (pthread_spin_trylock): Likewise * sysdeps/x86_64/nptl/pthread_spin_unlock.S (pthread_spin_unlock): Likewise
178 lines
4.1 KiB
ArmAsm
178 lines
4.1 KiB
ArmAsm
/* Copyright (C) 2002-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <shlib-compat.h>
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#include <lowlevellock.h>
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#include <lowlevelcond.h>
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#include <kernel-features.h>
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#include <pthread-pi-defines.h>
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#include <pthread-errnos.h>
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#include <stap-probe.h>
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.text
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/* int pthread_cond_broadcast (pthread_cond_t *cond) */
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ENTRY(__pthread_cond_broadcast)
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LIBC_PROBE (cond_broadcast, 1, %rdi)
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/* Get internal lock. */
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movl $1, %esi
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xorl %eax, %eax
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LOCK
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#if cond_lock == 0
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cmpxchgl %esi, (%rdi)
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#else
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cmpxchgl %esi, cond_lock(%rdi)
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#endif
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jnz 1f
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2: addq $cond_futex, %rdi
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movq total_seq-cond_futex(%rdi), %r9
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cmpq wakeup_seq-cond_futex(%rdi), %r9
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jna 4f
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/* Cause all currently waiting threads to recognize they are
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woken up. */
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movq %r9, wakeup_seq-cond_futex(%rdi)
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movq %r9, woken_seq-cond_futex(%rdi)
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addq %r9, %r9
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movl %r9d, (%rdi)
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incl broadcast_seq-cond_futex(%rdi)
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/* Get the address of the mutex used. */
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mov dep_mutex-cond_futex(%rdi), %R8_LP
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/* Unlock. */
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LOCK
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decl cond_lock-cond_futex(%rdi)
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jne 7f
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8: cmp $-1, %R8_LP
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je 9f
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/* Do not use requeue for pshared condvars. */
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testl $PS_BIT, MUTEX_KIND(%r8)
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jne 9f
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/* Requeue to a PI mutex if the PI bit is set. */
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movl MUTEX_KIND(%r8), %eax
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andl $(ROBUST_BIT|PI_BIT), %eax
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cmpl $PI_BIT, %eax
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je 81f
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/* Wake up all threads. */
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#ifdef __ASSUME_PRIVATE_FUTEX
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movl $(FUTEX_CMP_REQUEUE|FUTEX_PRIVATE_FLAG), %esi
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#else
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movl %fs:PRIVATE_FUTEX, %esi
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orl $FUTEX_CMP_REQUEUE, %esi
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#endif
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movl $SYS_futex, %eax
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movl $1, %edx
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movl $0x7fffffff, %r10d
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syscall
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/* For any kind of error, which mainly is EAGAIN, we try again
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with WAKE. The general test also covers running on old
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kernels. */
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cmpq $-4095, %rax
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jae 9f
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10: xorl %eax, %eax
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retq
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/* Wake up all threads. */
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81: movl $(FUTEX_CMP_REQUEUE_PI|FUTEX_PRIVATE_FLAG), %esi
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movl $SYS_futex, %eax
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movl $1, %edx
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movl $0x7fffffff, %r10d
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syscall
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/* For any kind of error, which mainly is EAGAIN, we try again
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with WAKE. The general test also covers running on old
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kernels. */
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cmpq $-4095, %rax
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jb 10b
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jmp 9f
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.align 16
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/* Unlock. */
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4: LOCK
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decl cond_lock-cond_futex(%rdi)
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jne 5f
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6: xorl %eax, %eax
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retq
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/* Initial locking failed. */
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1:
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#if cond_lock != 0
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addq $cond_lock, %rdi
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#endif
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LP_OP(cmp) $-1, dep_mutex-cond_lock(%rdi)
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movl $LLL_PRIVATE, %eax
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movl $LLL_SHARED, %esi
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cmovne %eax, %esi
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callq __lll_lock_wait
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#if cond_lock != 0
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subq $cond_lock, %rdi
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#endif
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jmp 2b
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/* Unlock in loop requires wakeup. */
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5: addq $cond_lock-cond_futex, %rdi
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LP_OP(cmp) $-1, dep_mutex-cond_lock(%rdi)
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movl $LLL_PRIVATE, %eax
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movl $LLL_SHARED, %esi
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cmovne %eax, %esi
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callq __lll_unlock_wake
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jmp 6b
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/* Unlock in loop requires wakeup. */
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7: addq $cond_lock-cond_futex, %rdi
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cmp $-1, %R8_LP
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movl $LLL_PRIVATE, %eax
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movl $LLL_SHARED, %esi
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cmovne %eax, %esi
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callq __lll_unlock_wake
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subq $cond_lock-cond_futex, %rdi
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jmp 8b
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9: /* The futex requeue functionality is not available. */
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cmp $-1, %R8_LP
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movl $0x7fffffff, %edx
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#ifdef __ASSUME_PRIVATE_FUTEX
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movl $FUTEX_WAKE, %eax
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movl $(FUTEX_WAKE|FUTEX_PRIVATE_FLAG), %esi
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cmove %eax, %esi
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#else
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movl $0, %eax
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movl %fs:PRIVATE_FUTEX, %esi
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cmove %eax, %esi
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orl $FUTEX_WAKE, %esi
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#endif
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movl $SYS_futex, %eax
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syscall
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jmp 10b
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END(__pthread_cond_broadcast)
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versioned_symbol (libpthread, __pthread_cond_broadcast, pthread_cond_broadcast,
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GLIBC_2_3_2)
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