mirror of git://sourceware.org/git/glibc.git
129 lines
2.5 KiB
ArmAsm
129 lines
2.5 KiB
ArmAsm
/* Copyright (C) 2002, 2003 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdep.h>
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#include <shlib-compat.h>
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#ifndef UP
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# define LOCK lock
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#else
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# define
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#endif
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#define SYS_gettimeofday __NR_gettimeofday
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#define SYS_futex 202
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#define EWOULDBLOCK 11
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#define EINVAL 22
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#define ETIMEDOUT 110
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.text
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.globl sem_timedwait
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.type sem_timedwait,@function
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.align 16
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sem_timedwait:
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movl (%rdi), %eax
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2: testl %eax, %eax
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je 1f
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leal -1(%eax), %edx
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LOCK
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cmpxchgl %edx, (%rdi)
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jne 2b
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xorl %eax, %eax
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ret
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/* Check whether the timeout value is valid. */
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1: subq $16, %rsp
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movq %rsp, %r10
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movq %rdi, %r8
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movq %rsi, %r9
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/* Check for invalid nanosecond field. */
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cmpq $1000000000, 4(%r9)
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movl $EINVAL, %eax
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jae 6f
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7: xorl %rsi, %rsi
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movq %rsp, %rdi
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movq $SYS_gettimeofday, %rax
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syscall
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/* Compute relative timeout. */
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movq 8(%rsp), %eax
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movq $1000, %rdi
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mul %rdi /* Milli seconds to nano seconds. */
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movq (%r9), %rdi
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movq 8(%r9), %rdi
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subq (%rsp), %rdi
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subq %rax, %rdi
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jns 5f
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addq $1000000000, %rsi
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decq %rdi
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5: testq %rdi, %rdi
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movl $ETIMEDOUT, %eax
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js 6f /* Time is already up. */
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movl %rdi, (%rsp) /* Store relative timeout. */
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movl %rsi, 8(%rsp)
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movq %r8, %rdi
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xorq %rsi, %rsi
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movq $SYS_futex, %rax
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xorl %edx, %edx
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syscall
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testq %rax, %rax
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je 9f
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cmpq $-EWOULDBLOCK, %rax
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jne 3f
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9: movl (%rdi), %eax
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8: testl %eax, %eax
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je 7b
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leal -1(%eax), %ecx
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LOCK
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cmpxchgl %ecx, (%rdi)
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jne 8b
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addq $16, %rsp
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xorl %eax, %eax
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retq
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3: negq %eax
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6:
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#if USE___THREAD
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movq errno@gottpoff(%rip), %rdx
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movl %eax, %fs:(%rdx)
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#else
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movl %eax, %edx
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call __errno_location@plt
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movl %edx, (%rax)
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#endif
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addq $16, %rsp
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orl $-1, %eax
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retq
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.size sem_timedwait,.-sem_timedwait
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