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author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2017-12-29 15:01:46 +0100 |
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committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2017-12-29 15:01:46 +0100 |
commit | 218db6679aea0dcf05fb60566cef6e18f706d9ba (patch) | |
tree | 3099f55335743748ff18bd435e4de25b22c8f54a /sysdeps/mach/hurd/pt-mutex-trylock.c | |
parent | 0a69b89843ec466fa20c994a29d13de6a45c3acb (diff) | |
parent | 7d4a84731cd80a1ef711c83535c6340f0e2b143f (diff) |
Merge branch 'master' into 2.262.26
Diffstat (limited to 'sysdeps/mach/hurd/pt-mutex-trylock.c')
-rw-r--r-- | sysdeps/mach/hurd/pt-mutex-trylock.c | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/pt-mutex-trylock.c b/sysdeps/mach/hurd/pt-mutex-trylock.c new file mode 100644 index 0000000..6680094 --- /dev/null +++ b/sysdeps/mach/hurd/pt-mutex-trylock.c @@ -0,0 +1,77 @@ +/* Copyright (C) 2016 Free Software Foundation, Inc. + Contributed by Agustina Arzille <avarzille@riseup.net>, 2016. + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License + as published by the Free Software Foundation; either + version 2 of the license, or (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this program; if not, see + <http://www.gnu.org/licenses/>. +*/ + +#include <pthread.h> +#include <stdlib.h> +#include <assert.h> +#include <pt-internal.h> +#include "pt-mutex.h" +#include <hurdlock.h> + +int __pthread_mutex_trylock (pthread_mutex_t *mtxp) +{ + struct __pthread *self; + int ret; + + switch (MTX_TYPE (mtxp)) + { + case PT_MTX_NORMAL: + ret = lll_trylock (&mtxp->__lock); + break; + + case PT_MTX_RECURSIVE: + self = _pthread_self (); + if (mtx_owned_p (mtxp, self, mtxp->__flags)) + { + if (__glibc_unlikely (mtxp->__cnt + 1 == 0)) + return (EAGAIN); + + ++mtxp->__cnt; + ret = 0; + } + else if ((ret = lll_trylock (&mtxp->__lock)) == 0) + { + mtx_set_owner (mtxp, self, mtxp->__flags); + mtxp->__cnt = 1; + } + + break; + + case PT_MTX_ERRORCHECK: + self = _pthread_self (); + if ((ret = lll_trylock (&mtxp->__lock)) == 0) + mtx_set_owner (mtxp, self, mtxp->__flags); + break; + + case PT_MTX_NORMAL | PTHREAD_MUTEX_ROBUST: + case PT_MTX_RECURSIVE | PTHREAD_MUTEX_ROBUST: + case PT_MTX_ERRORCHECK | PTHREAD_MUTEX_ROBUST: + self = _pthread_self (); + ROBUST_LOCK (self, mtxp, __lll_robust_trylock); + break; + + default: + ret = EINVAL; + break; + } + + return (ret); +} + +strong_alias (__pthread_mutex_trylock, _pthread_mutex_trylock) +strong_alias (__pthread_mutex_trylock, pthread_mutex_trylock) |