From b41f74438672dd682bc01ae818cb3da654f22c1e Mon Sep 17 00:00:00 2001 From: marha Date: Wed, 13 Feb 2013 10:41:10 +0100 Subject: Updated to latest CVS version of pthreads --- pthreads/pthread_tryjoin_np.c | 173 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 173 insertions(+) create mode 100755 pthreads/pthread_tryjoin_np.c (limited to 'pthreads/pthread_tryjoin_np.c') diff --git a/pthreads/pthread_tryjoin_np.c b/pthreads/pthread_tryjoin_np.c new file mode 100755 index 000000000..e9fe1dae6 --- /dev/null +++ b/pthreads/pthread_tryjoin_np.c @@ -0,0 +1,173 @@ +/* + * pthread_tryjoin_np.c + * + * Description: + * This translation unit implements functions related to thread + * synchronisation. + * + * -------------------------------------------------------------------------- + * + * Pthreads-win32 - POSIX Threads Library for Win32 + * Copyright(C) 1998 John E. Bossom + * Copyright(C) 1999,2012 Pthreads-win32 contributors + * + * Homepage1: http://sourceware.org/pthreads-win32/ + * Homepage2: http://sourceforge.net/projects/pthreads4w/ + * + * The current list of contributors is contained + * in the file CONTRIBUTORS included with the source + * code distribution. The list can also be seen at the + * following World Wide Web location: + * http://sources.redhat.com/pthreads-win32/contributors.html + * + * This 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 of the License, or (at your option) any later version. + * + * This 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 this library in the file COPYING.LIB; + * if not, write to the Free Software Foundation, Inc., + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + +#ifdef HAVE_CONFIG_H +# include +#endif + +#include "pthread.h" +#include "implement.h" + +/* + * Not needed yet, but defining it should indicate clashes with build target + * environment that should be fixed. + */ +#if !defined(WINCE) +# include +#endif + + +int +pthread_tryjoin_np (pthread_t thread, void **value_ptr) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * This function checks if 'thread' has terminated and + * returns the thread's exit value if 'value_ptr' is not + * NULL or until 'abstime' passes and returns an + * error. If the thread has not exited the function returns + * immediately. This function detaches the thread on successful + * completion. + * + * PARAMETERS + * thread + * an instance of pthread_t + * + * value_ptr + * pointer to an instance of pointer to void + * + * + * DESCRIPTION + * This function checks if 'thread' has terminated and + * returns the thread's exit value if 'value_ptr' is not + * NULL or until 'abstime' passes and returns an + * error. If the thread has not exited the function returns + * immediately. This function detaches the thread on successful + * completion. + * NOTE: Detached threads cannot be joined or canceled. + * In this implementation 'abstime' will be + * resolved to the nearest millisecond. + * + * RESULTS + * 0 'thread' has completed + * EBUSY 'thread' is still live + * EINVAL thread is not a joinable thread, + * ESRCH no thread could be found with ID 'thread', + * ENOENT thread couldn't find it's own valid handle, + * EDEADLK attempt to join thread with self + * + * ------------------------------------------------------ + */ +{ + int result; + pthread_t self; + ptw32_thread_t * tp = (ptw32_thread_t *) thread.p; + ptw32_mcs_local_node_t node; + + ptw32_mcs_lock_acquire(&ptw32_thread_reuse_lock, &node); + + if (NULL == tp + || thread.x != tp->ptHandle.x) + { + result = ESRCH; + } + else if (PTHREAD_CREATE_DETACHED == tp->detachState) + { + result = EINVAL; + } + else + { + result = 0; + } + + ptw32_mcs_lock_release(&node); + + if (result == 0) + { + /* + * The target thread is joinable and can't be reused before we join it. + */ + self = pthread_self(); + + if (NULL == self.p) + { + result = ENOENT; + } + else if (pthread_equal (self, thread)) + { + result = EDEADLK; + } + else + { + /* + * Pthread_join is a cancellation point. + * If we are canceled then our target thread must not be + * detached (destroyed). This is guaranteed because + * pthreadCancelableTimedWait will not return if we + * are canceled. + */ + result = pthreadCancelableTimedWait (tp->threadH, 0); + + if (0 == result) + { + if (value_ptr != NULL) + { + *value_ptr = tp->exitStatus; + } + + /* + * The result of making multiple simultaneous calls to + * pthread_join(), pthread_timedjoin_np(), pthread_tryjoin_np() + * or pthread_detach() specifying the same target is undefined. + */ + result = pthread_detach (thread); + } + else if (ETIMEDOUT == result) + { + result = EBUSY; + } + else + { + result = ESRCH; + } + } + } + + return (result); + +} -- cgit v1.2.3