projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| b01fe5f7 | 1 | /* sem_post -- post to a POSIX semaphore. SPARC version. |
| d4697bc9 | 2 | Copyright (C) 2003-2014 Free Software Foundation, Inc. |
| b01fe5f7 UD |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2003. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Lesser General Public | |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 10 | ||
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | Lesser General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public | |
| 59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| b01fe5f7 UD |
19 | |
| 20 | #include <errno.h> | |
| 21 | #include <sysdep.h> | |
| 22 | #include <lowlevellock.h> | |
| 23 | #include <internaltypes.h> | |
| 24 | #include <semaphore.h> | |
| 25 | ||
| 26 | #include <shlib-compat.h> | |
| 27 | ||
| 28 | int | |
| 29 | __new_sem_post (sem_t *sem) | |
| 30 | { | |
| e4720b0e JJ |
31 | struct sparc_new_sem *isem = (struct sparc_new_sem *) sem; |
| 32 | int nr; | |
| b01fe5f7 UD |
33 | |
| 34 | if (__atomic_is_v9) | |
| e4720b0e | 35 | nr = atomic_increment_val (&isem->value); |
| b01fe5f7 UD |
36 | else |
| 37 | { | |
| e4720b0e JJ |
38 | __sparc32_atomic_do_lock24 (&isem->lock); |
| 39 | nr = ++(isem->value); | |
| 40 | __sparc32_atomic_do_unlock24 (&isem->lock); | |
| b01fe5f7 | 41 | } |
| e4720b0e JJ |
42 | atomic_full_barrier (); |
| 43 | if (isem->nwaiters > 0) | |
| 44 | { | |
| 45 | int err = lll_futex_wake (&isem->value, 1, | |
| 46 | isem->private ^ FUTEX_PRIVATE_FLAG); | |
| 47 | if (__builtin_expect (err, 0) < 0) | |
| 48 | { | |
| 49 | __set_errno (-err); | |
| 50 | return -1; | |
| 51 | } | |
| 52 | } | |
| 53 | return 0; | |
| 54 | } | |
| 55 | versioned_symbol (libpthread, __new_sem_post, sem_post, GLIBC_2_1); | |
| 56 | ||
| 57 | ||
| 58 | #if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_1) | |
| 59 | int | |
| 60 | attribute_compat_text_section | |
| 61 | __old_sem_post (sem_t *sem) | |
| 62 | { | |
| 63 | struct sparc_old_sem *isem = (struct sparc_old_sem *) sem; | |
| 64 | int nr; | |
| 65 | ||
| 66 | if (__atomic_is_v9) | |
| 67 | nr = atomic_increment_val (&isem->value); | |
| 68 | else | |
| 69 | { | |
| 70 | __sparc32_atomic_do_lock24 (&isem->lock); | |
| 71 | nr = ++(isem->value); | |
| 72 | __sparc32_atomic_do_unlock24 (&isem->lock); | |
| 73 | } | |
| 74 | int err = lll_futex_wake (&isem->value, 1, | |
| 75 | isem->private ^ FUTEX_PRIVATE_FLAG); | |
| 2c1d6172 | 76 | if (__builtin_expect (err, 0) < 0) |
| b01fe5f7 | 77 | { |
| 2c1d6172 UD |
78 | __set_errno (-err); |
| 79 | return -1; | |
| b01fe5f7 UD |
80 | } |
| 81 | return 0; | |
| 82 | } | |
| b01fe5f7 UD |
83 | compat_symbol (libpthread, __old_sem_post, sem_post, GLIBC_2_0); |
| 84 | #endif |