From 0b3366f6a93ac0f7e2028745ea557c0acd8722c6 Mon Sep 17 00:00:00 2001 From: "\"Steven J. Hill\"" Date: Sat, 7 May 2005 02:04:55 +0000 Subject: Import in NPTL code from glibc. For further information please consult the 'README.NPTL' file. --- libpthread/nptl/pthread_mutex_unlock.c | 78 ++++++++++++++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 libpthread/nptl/pthread_mutex_unlock.c (limited to 'libpthread/nptl/pthread_mutex_unlock.c') diff --git a/libpthread/nptl/pthread_mutex_unlock.c b/libpthread/nptl/pthread_mutex_unlock.c new file mode 100644 index 000000000..32bc2a4bc --- /dev/null +++ b/libpthread/nptl/pthread_mutex_unlock.c @@ -0,0 +1,78 @@ +/* Copyright (C) 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 2002. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include "pthreadP.h" +#include + + +int +internal_function attribute_hidden +__pthread_mutex_unlock_usercnt (mutex, decr) + pthread_mutex_t *mutex; + int decr; +{ + switch (__builtin_expect (mutex->__data.__kind, PTHREAD_MUTEX_TIMED_NP)) + { + case PTHREAD_MUTEX_RECURSIVE_NP: + /* Recursive mutex. */ + if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid)) + return EPERM; + + if (--mutex->__data.__count != 0) + /* We still hold the mutex. */ + return 0; + break; + + case PTHREAD_MUTEX_ERRORCHECK_NP: + /* Error checking mutex. */ + if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid) + || ! lll_mutex_islocked (mutex->__data.__lock)) + return EPERM; + break; + + default: + /* Correct code cannot set any other type. */ + case PTHREAD_MUTEX_TIMED_NP: + case PTHREAD_MUTEX_ADAPTIVE_NP: + /* Normal mutex. Nothing special to do. */ + break; + } + + /* Always reset the owner field. */ + mutex->__data.__owner = 0; + if (decr) + /* One less user. */ + --mutex->__data.__nusers; + + /* Unlock. */ + lll_mutex_unlock (mutex->__data.__lock); + + return 0; +} + + +int +__pthread_mutex_unlock (mutex) + pthread_mutex_t *mutex; +{ + return __pthread_mutex_unlock_usercnt (mutex, 1); +} +strong_alias (__pthread_mutex_unlock, pthread_mutex_unlock) +strong_alias (__pthread_mutex_unlock, __pthread_mutex_unlock_internal) -- cgit v1.2.3