?? sem_post.s
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/* Copyright (C) 2002, 2003, 2005 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>#include <shlib-compat.h>#include <pthread-errnos.h>#ifndef UP# define LOCK lock#else# define#endif#define SYS_futex 202#define FUTEX_WAKE 1 .text .globl sem_post .type sem_post,@function .align 16sem_post: movl $1, %edx LOCK xaddl %edx, (%rdi) movl $SYS_futex, %eax movl $FUTEX_WAKE, %esi incl %edx syscall testq %rax, %rax js 1f xorl %eax, %eax retq1:#if USE___THREAD movq errno@gottpoff(%rip), %rdx movl $EINVAL, %fs:(%rdx)#else callq __errno_location@plt movl $EINVAL, (%rax)#endif orl $-1, %eax retq .size sem_post,.-sem_post
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