projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 33574c17 | 1 | /* pthread_mutex_trylock. Hurd version. |
| 6d7e8eda | 2 | Copyright (C) 2016-2023 Free Software Foundation, Inc. |
| 33574c17 ST |
3 | This file is part of the GNU C Library. |
| 4 | ||
| ad2b41bf ST |
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. | |
| 33574c17 | 9 | |
| ad2b41bf | 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 33574c17 | 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| ad2b41bf ST |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. | |
| 33574c17 | 14 | |
| ad2b41bf ST |
15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see | |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| 33574c17 ST |
18 | |
| 19 | #include <pthread.h> | |
| 20 | #include <stdlib.h> | |
| 21 | #include <assert.h> | |
| 22 | #include <pt-internal.h> | |
| 23 | #include "pt-mutex.h" | |
| 24 | #include <hurdlock.h> | |
| 25 | ||
| 26 | int | |
| 27 | __pthread_mutex_trylock (pthread_mutex_t *mtxp) | |
| 28 | { | |
| 29 | struct __pthread *self; | |
| 30 | int ret; | |
| 31 | ||
| 32 | switch (MTX_TYPE (mtxp)) | |
| 33 | { | |
| 34 | case PT_MTX_NORMAL: | |
| bec41242 | 35 | ret = lll_trylock (mtxp->__lock); |
| 33574c17 ST |
36 | if (ret) |
| 37 | ret = EBUSY; | |
| 38 | break; | |
| 39 | ||
| 40 | case PT_MTX_RECURSIVE: | |
| 41 | self = _pthread_self (); | |
| 42 | if (mtx_owned_p (mtxp, self, mtxp->__flags)) | |
| 43 | { | |
| 44 | if (__glibc_unlikely (mtxp->__cnt + 1 == 0)) | |
| 45 | return EAGAIN; | |
| 46 | ||
| 47 | ++mtxp->__cnt; | |
| 48 | ret = 0; | |
| 49 | } | |
| bec41242 | 50 | else if ((ret = lll_trylock (mtxp->__lock)) == 0) |
| 33574c17 ST |
51 | { |
| 52 | mtx_set_owner (mtxp, self, mtxp->__flags); | |
| 53 | mtxp->__cnt = 1; | |
| 54 | } | |
| 55 | else | |
| 56 | ret = EBUSY; | |
| 57 | ||
| 58 | break; | |
| 59 | ||
| 60 | case PT_MTX_ERRORCHECK: | |
| 61 | self = _pthread_self (); | |
| bec41242 | 62 | if ((ret = lll_trylock (mtxp->__lock)) == 0) |
| 33574c17 ST |
63 | mtx_set_owner (mtxp, self, mtxp->__flags); |
| 64 | else | |
| 65 | ret = EBUSY; | |
| 66 | break; | |
| 67 | ||
| 68 | case PT_MTX_NORMAL | PTHREAD_MUTEX_ROBUST: | |
| 69 | case PT_MTX_RECURSIVE | PTHREAD_MUTEX_ROBUST: | |
| 70 | case PT_MTX_ERRORCHECK | PTHREAD_MUTEX_ROBUST: | |
| 71 | self = _pthread_self (); | |
| bec41242 | 72 | ROBUST_LOCK (self, mtxp, lll_robust_trylock); |
| 33574c17 ST |
73 | break; |
| 74 | ||
| 75 | default: | |
| 76 | ret = EINVAL; | |
| 77 | break; | |
| 78 | } | |
| 79 | ||
| 80 | return ret; | |
| 81 | } | |
| 82 | ||
| c27bcc95 | 83 | hidden_def (__pthread_mutex_trylock) |
| 33574c17 | 84 | strong_alias (__pthread_mutex_trylock, _pthread_mutex_trylock) |
| fba7fc5a | 85 | weak_alias (__pthread_mutex_trylock, pthread_mutex_trylock) |