137 lines
4.1 KiB
C
137 lines
4.1 KiB
C
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/*
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* pthread_detach.c
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*
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* Description:
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* This translation unit implements functions related to thread
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* synchronisation.
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*
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* --------------------------------------------------------------------------
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*
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* Pthreads-win32 - POSIX Threads Library for Win32
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* Copyright(C) 1998 John E. Bossom
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* Copyright(C) 1999,2005 Pthreads-win32 contributors
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*
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* Contact Email: rpj@callisto.canberra.edu.au
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*
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* The current list of contributors is contained
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* in the file CONTRIBUTORS included with the source
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* code distribution. The list can also be seen at the
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* following World Wide Web location:
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* http://sources.redhat.com/pthreads-win32/contributors.html
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library in the file COPYING.LIB;
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* if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "pthread.h"
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#include "implement.h"
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/*
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* Not needed yet, but defining it should indicate clashes with build target
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* environment that should be fixed.
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*/
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#if !defined(WINCE)
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# include <signal.h>
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#endif
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int
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pthread_detach (pthread_t thread)
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/*
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* ------------------------------------------------------
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* DOCPUBLIC
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* This function detaches the given thread.
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*
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* PARAMETERS
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* thread
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* an instance of a pthread_t
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*
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*
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* DESCRIPTION
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* This function detaches the given thread. You may use it to
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* detach the main thread or to detach a joinable thread.
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* NOTE: detached threads cannot be joined;
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* storage is freed immediately on termination.
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*
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* RESULTS
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* 0 successfully detached the thread,
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* EINVAL thread is not a joinable thread,
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* ENOSPC a required resource has been exhausted,
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* ESRCH no thread could be found for 'thread',
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*
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* ------------------------------------------------------
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*/
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{
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int result;
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BOOL destroyIt = PTW32_FALSE;
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ptw32_thread_t * tp = (ptw32_thread_t *) thread.p;
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ptw32_mcs_local_node_t node;
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ptw32_mcs_lock_acquire(&ptw32_thread_reuse_lock, &node);
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if (NULL == tp
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|| thread.x != tp->ptHandle.x)
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{
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result = ESRCH;
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}
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else if (PTHREAD_CREATE_DETACHED == tp->detachState)
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{
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result = EINVAL;
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}
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else
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{
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ptw32_mcs_local_node_t stateLock;
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/*
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* Joinable ptw32_thread_t structs are not scavenged until
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* a join or detach is done. The thread may have exited already,
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* but all of the state and locks etc are still there.
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*/
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result = 0;
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ptw32_mcs_lock_acquire (&tp->stateLock, &stateLock);
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if (tp->state != PThreadStateLast)
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{
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tp->detachState = PTHREAD_CREATE_DETACHED;
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}
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else if (tp->detachState != PTHREAD_CREATE_DETACHED)
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{
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/*
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* Thread is joinable and has exited or is exiting.
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*/
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destroyIt = PTW32_TRUE;
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}
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ptw32_mcs_lock_release (&stateLock);
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}
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ptw32_mcs_lock_release(&node);
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if (result == 0)
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{
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/* Thread is joinable */
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if (destroyIt)
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{
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/* The thread has exited or is exiting but has not been joined or
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* detached. Need to wait in case it's still exiting.
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*/
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(void) WaitForSingleObject(tp->threadH, INFINITE);
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ptw32_threadDestroy (thread);
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}
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}
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return (result);
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} /* pthread_detach */
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