1 | /* pthread_mutex_lock. Hurd version. |
2 | Copyright (C) 2016-2024 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
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, see |
17 | <https://www.gnu.org/licenses/>. */ |
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 | hidden_def (__pthread_mutex_lock) |
80 | strong_alias (__pthread_mutex_lock, _pthread_mutex_lock) |
81 | weak_alias (__pthread_mutex_lock, pthread_mutex_lock) |
82 | |