--- /dev/null
+/* Copyright (C) 2002, 2003 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* In libc.so we do not unconditionally use the lock prefix. Only if
+ the application is using threads. */
+#ifndef UP
+# define LOCK \
+ cmpl $0, __libc_multiple_threads_ptr(%rip); \
+ je 0f; \
+ lock; \
+0:
+#endif
+
+#include "lowlevellock.S"
--- /dev/null
+/* Copyright (C) 2002, 2003 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+
+ .text
+
+#ifndef LOCK
+# ifdef UP
+# define LOCK
+# else
+# define LOCK lock
+# endif
+#endif
+
+#define SYS_gettimeofday __NR_gettimeofday
+#define SYS_futex 202
+#define FUTEX_WAIT 0
+#define FUTEX_WAKE 1
+
+#define ETIMEDOUT 110
+
+
+ /* Modified: %rax, %rsi. */
+ .globl __lll_lock_wait
+ .type __lll_lock_wait,@function
+ .hidden __lll_lock_wait
+ .align 16
+__lll_lock_wait:
+ pushq %r10
+ pushq %rdx
+
+ xorq %r10, %r10 /* No timeout. */
+
+1:
+ leal -1(%esi), %edx /* account for the preceeded xadd. */
+ movq %r10, %rsi /* movl $FUTEX_WAIT, %ecx */
+ movq $SYS_futex, %rax
+ syscall
+
+ orl $-1, %esi /* Load -1. */
+ LOCK
+ xaddl %esi, (%rdi)
+ jne,pn 1b
+
+ movl $-1, (%rdi)
+
+ popq %rdx
+ popq %r10
+ retq
+ .size __lll_lock_wait,.-__lll_lock_wait
+
+
+#ifdef NOT_IN_libc
+ .globl lll_unlock_wake_cb
+ .type lll_unlock_wake_cb,@function
+ .hidden lll_unlock_wake_cb
+ .align 16
+lll_unlock_wake_cb:
+ pushq %rsi
+ pushq %rdx
+
+ LOCK
+ addl $1, (%rdi)
+ jng 1f
+
+ popq %rdx
+ popq %rsi
+ retq
+ .size lll_unlock_wake_cb,.-lll_unlock_wake_cb
+#endif
+
+
+ .globl __lll_unlock_wake
+ .type __lll_unlock_wake,@function
+ .hidden __lll_unlock_wake
+ .align 16
+__lll_unlock_wake:
+ pushq %rsi
+ pushq %rdx
+
+1: movq $FUTEX_WAKE, %rsi
+ movl $1, %edx /* Wake one thread. */
+ movq $SYS_futex, %rax
+ movl %edx, (%rdi) /* Stores '$1'. */
+ syscall
+
+ popq %rdx
+ popq %rsi
+ retq
+ .size __lll_unlock_wake,.-__lll_unlock_wake
+
+
+#ifdef NOT_IN_libc
+ .globl __lll_timedwait_tid
+ .type __lll_timedwait_tid,@function
+ .hidden __lll_timedwait_tid
+ .align 16
+__lll_timedwait_tid:
+ movl %rdi, %r8
+ movl %rsi, %r9
+
+ subq $16, %rsp
+
+ /* Get current time. */
+2: movq %rsp, %rdi
+ xorq %rsi, %rsi
+ movq $SYS_gettimeofday, %rax
+ syscall
+
+ /* Compute relative timeout. */
+ movq 8(%esp), %rax
+ movq $1000, %rdi
+ mul %rdx /* Milli seconds to nano seconds. */
+ movq (%r9), %rdi
+ movq 8(%r9), %rsi
+ subq (%rsp), %rdi
+ subq %rax, %rsi
+ jns 5f
+ addq $1000000000, %rsi
+ decq %rdi
+5: testq %rdi, %rdi
+ js 6f /* Time is already up. */
+
+ movq %rdi, (%rsp) /* Store relative timeout. */
+ movq %rsi, 8(%rsp)
+
+ movl (%r8), %edx
+ testl %edx, %edx
+ jz 4f
+
+ movq %rsp, %r10
+ xorq %rsi, %rsi /* movl $FUTEX_WAIT, %ecx */
+ movq %r8, %rdi
+ movq $SYS_futex, %rax
+ syscall
+
+ cmpl $0, (%rdi)
+ jne 1f
+4: xorl %eax, %eax
+
+ addq $16, %rsp
+ retq
+
+1: cmpq $-ETIMEDOUT, %rax
+ jne 2b
+
+6: movl $ETIMEDOUT, %eax
+ addq $16, %rsp
+ retq
+ .size __lll_timedwait_tid,.-__lll_timedwait_tid
+#endif
projects / external / glibc.git / commitdiff