diff options
Diffstat (limited to 'pthreads/pthread_detach.c')
| -rw-r--r-- | pthreads/pthread_detach.c | 277 |
1 files changed, 136 insertions, 141 deletions
diff --git a/pthreads/pthread_detach.c b/pthreads/pthread_detach.c index a3c3ef973..9ff6587f3 100644 --- a/pthreads/pthread_detach.c +++ b/pthreads/pthread_detach.c @@ -1,141 +1,136 @@ -/*
- * pthread_detach.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) 1999,2005 Pthreads-win32 contributors
- *
- * Contact Email: rpj@callisto.canberra.edu.au
- *
- * 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
- */
-
-#include "pthread.h"
-#include "implement.h"
-
-/*
- * Not needed yet, but defining it should indicate clashes with build target
- * environment that should be fixed.
- */
-#ifndef WINCE
-# include <signal.h>
-#endif
-
-
-int
-pthread_detach (pthread_t thread)
- /*
- * ------------------------------------------------------
- * DOCPUBLIC
- * This function detaches the given thread.
- *
- * PARAMETERS
- * thread
- * an instance of a pthread_t
- *
- *
- * DESCRIPTION
- * This function detaches the given thread. You may use it to
- * detach the main thread or to detach a joinable thread.
- * NOTE: detached threads cannot be joined;
- * storage is freed immediately on termination.
- *
- * RESULTS
- * 0 successfully detached the thread,
- * EINVAL thread is not a joinable thread,
- * ENOSPC a required resource has been exhausted,
- * ESRCH no thread could be found for 'thread',
- *
- * ------------------------------------------------------
- */
-{
- int result;
- BOOL destroyIt = PTW32_FALSE;
- ptw32_thread_t * tp = (ptw32_thread_t *) thread.p;
-
- EnterCriticalSection (&ptw32_thread_reuse_lock);
-
- if (NULL == tp
- || thread.x != tp->ptHandle.x)
- {
- result = ESRCH;
- }
- else if (PTHREAD_CREATE_DETACHED == tp->detachState)
- {
- result = EINVAL;
- }
- else
- {
- /*
- * Joinable ptw32_thread_t structs are not scavenged until
- * a join or detach is done. The thread may have exited already,
- * but all of the state and locks etc are still there.
- */
- result = 0;
-
- if (pthread_mutex_lock (&tp->cancelLock) == 0)
- {
- if (tp->state != PThreadStateLast)
- {
- tp->detachState = PTHREAD_CREATE_DETACHED;
- }
- else if (tp->detachState != PTHREAD_CREATE_DETACHED)
- {
- /*
- * Thread is joinable and has exited or is exiting.
- */
- destroyIt = PTW32_TRUE;
- }
- (void) pthread_mutex_unlock (&tp->cancelLock);
- }
- else
- {
- /* cancelLock shouldn't fail, but if it does ... */
- result = ESRCH;
- }
- }
-
- LeaveCriticalSection (&ptw32_thread_reuse_lock);
-
- if (result == 0)
- {
- /* Thread is joinable */
-
- if (destroyIt)
- {
- /* The thread has exited or is exiting but has not been joined or
- * detached. Need to wait in case it's still exiting.
- */
- (void) WaitForSingleObject(tp->threadH, INFINITE);
- ptw32_threadDestroy (thread);
- }
- }
-
- return (result);
-
-} /* pthread_detach */
+/* + * pthread_detach.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) 1999,2005 Pthreads-win32 contributors + * + * Contact Email: rpj@callisto.canberra.edu.au + * + * 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 + */ + +#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 <signal.h> +#endif + + +int +pthread_detach (pthread_t thread) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * This function detaches the given thread. + * + * PARAMETERS + * thread + * an instance of a pthread_t + * + * + * DESCRIPTION + * This function detaches the given thread. You may use it to + * detach the main thread or to detach a joinable thread. + * NOTE: detached threads cannot be joined; + * storage is freed immediately on termination. + * + * RESULTS + * 0 successfully detached the thread, + * EINVAL thread is not a joinable thread, + * ENOSPC a required resource has been exhausted, + * ESRCH no thread could be found for 'thread', + * + * ------------------------------------------------------ + */ +{ + int result; + BOOL destroyIt = PTW32_FALSE; + 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 + { + ptw32_mcs_local_node_t stateLock; + /* + * Joinable ptw32_thread_t structs are not scavenged until + * a join or detach is done. The thread may have exited already, + * but all of the state and locks etc are still there. + */ + result = 0; + + ptw32_mcs_lock_acquire (&tp->stateLock, &stateLock); + if (tp->state != PThreadStateLast) + { + tp->detachState = PTHREAD_CREATE_DETACHED; + } + else if (tp->detachState != PTHREAD_CREATE_DETACHED) + { + /* + * Thread is joinable and has exited or is exiting. + */ + destroyIt = PTW32_TRUE; + } + ptw32_mcs_lock_release (&stateLock); + } + + ptw32_mcs_lock_release(&node); + + if (result == 0) + { + /* Thread is joinable */ + + if (destroyIt) + { + /* The thread has exited or is exiting but has not been joined or + * detached. Need to wait in case it's still exiting. + */ + (void) WaitForSingleObject(tp->threadH, INFINITE); + ptw32_threadDestroy (thread); + } + } + + return (result); + +} /* pthread_detach */ |