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33574c17 | 1 | /* pthread_mutex_lock. Hurd version. |
04277e02 | 2 | Copyright (C) 2016-2019 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 | |
17 | <http://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_lock (pthread_mutex_t *mtxp) | |
28 | { | |
29 | struct __pthread *self; | |
30 | int flags = mtxp->__flags & GSYNC_SHARED; | |
31 | int ret = 0; | |
32 | ||
33 | switch (MTX_TYPE (mtxp)) | |
34 | { | |
35 | case PT_MTX_NORMAL: | |
36 | lll_lock (&mtxp->__lock, flags); | |
37 | break; | |
38 | ||
39 | case PT_MTX_RECURSIVE: | |
40 | self = _pthread_self (); | |
41 | if (mtx_owned_p (mtxp, self, flags)) | |
42 | { | |
43 | if (__glibc_unlikely (mtxp->__cnt + 1 == 0)) | |
44 | return EAGAIN; | |
45 | ||
46 | ++mtxp->__cnt; | |
47 | return ret; | |
48 | } | |
49 | ||
50 | lll_lock (&mtxp->__lock, flags); | |
51 | mtx_set_owner (mtxp, self, flags); | |
52 | mtxp->__cnt = 1; | |
53 | break; | |
54 | ||
55 | case PT_MTX_ERRORCHECK: | |
56 | self = _pthread_self (); | |
57 | if (mtx_owned_p (mtxp, self, flags)) | |
58 | return EDEADLK; | |
59 | ||
60 | lll_lock (&mtxp->__lock, flags); | |
61 | mtx_set_owner (mtxp, self, flags); | |
62 | break; | |
63 | ||
64 | case PT_MTX_NORMAL | PTHREAD_MUTEX_ROBUST: | |
65 | case PT_MTX_RECURSIVE | PTHREAD_MUTEX_ROBUST: | |
66 | case PT_MTX_ERRORCHECK | PTHREAD_MUTEX_ROBUST: | |
67 | self = _pthread_self (); | |
68 | ROBUST_LOCK (self, mtxp, __lll_robust_lock, flags); | |
69 | break; | |
70 | ||
71 | default: | |
72 | ret = EINVAL; | |
73 | break; | |
74 | } | |
75 | ||
76 | return ret; | |
77 | } | |
78 | ||
79 | strong_alias (__pthread_mutex_lock, _pthread_mutex_lock) | |
80 | strong_alias (__pthread_mutex_lock, pthread_mutex_lock) |