/* * 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. */#include <signal.h>intpthread_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 */