projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 0ecb606c | 1 | /* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc. |
| db5f2fc9 UD |
2 | This file is part of the GNU C Library. |
| 3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Lesser General Public | |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Lesser General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Lesser General Public | |
| 16 | License along with the GNU C Library; if not, write to the Free | |
| 17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 18 | 02111-1307 USA. */ | |
| 19 | ||
| 20 | #include <sysdep.h> | |
| 21 | #include <shlib-compat.h> | |
| 326132db | 22 | #include <pthread-errnos.h> |
| db5f2fc9 UD |
23 | |
| 24 | #ifndef UP | |
| 25 | # define LOCK lock | |
| 26 | #else | |
| 27 | # define | |
| 28 | #endif | |
| 29 | ||
| 30 | #define SYS_futex 202 | |
| 31 | #define FUTEX_WAKE 1 | |
| 32 | ||
| db5f2fc9 UD |
33 | |
| 34 | .text | |
| 35 | ||
| 7588880f UD |
36 | .globl sem_post |
| 37 | .type sem_post,@function | |
| db5f2fc9 | 38 | .align 16 |
| 7588880f | 39 | sem_post: |
| db5f2fc9 UD |
40 | movl $1, %edx |
| 41 | LOCK | |
| 5a03acfe | 42 | xaddl %edx, (%rdi) |
| db5f2fc9 | 43 | |
| 0ecb606c JJ |
44 | movl $SYS_futex, %eax |
| 45 | movl $FUTEX_WAKE, %esi | |
| db5f2fc9 UD |
46 | incl %edx |
| 47 | syscall | |
| 48 | ||
| 49 | testq %rax, %rax | |
| 50 | js 1f | |
| 51 | ||
| 52 | xorl %eax, %eax | |
| 53 | retq | |
| 54 | ||
| 55 | 1: | |
| 56 | #if USE___THREAD | |
| 57 | movq errno@gottpoff(%rip), %rdx | |
| 58 | movl $EINVAL, %fs:(%rdx) | |
| 59 | #else | |
| 6c477888 | 60 | callq __errno_location@plt |
| db5f2fc9 UD |
61 | movl $EINVAL, (%rax) |
| 62 | #endif | |
| 63 | ||
| 64 | orl $-1, %eax | |
| 65 | retq | |
| 7588880f | 66 | .size sem_post,.-sem_post |