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/*
* pthread_self.c
*
* Description:
* This translation unit implements miscellaneous thread functions.
*
* --------------------------------------------------------------------------
*
* Pthreads-win32 - POSIX Threads Library for Win32
* Copyright(C) 1998 John E. Bossom
* Copyright(C) 1999,2003 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"
pthread_t
pthread_self (void)
/*
* ------------------------------------------------------
* DOCPUBLIC
* This function returns a reference to the current running
* thread.
*
* PARAMETERS
* N/A
*
*
* DESCRIPTION
* This function returns a reference to the current running
* thread.
*
* RESULTS
* pthread_t reference to the current thread
*
* ------------------------------------------------------
*/
{
pthread_t self;
#ifdef _UWIN
if (!ptw32_selfThreadKey)
return (NULL);
#endif
self = (pthread_t) pthread_getspecific (ptw32_selfThreadKey);
if (self == NULL)
{
/*
* Need to create an implicit 'self' for the currently
* executing thread.
*/
self = ptw32_new ();
if (self != NULL)
{
/*
* This is a non-POSIX thread which has chosen to call
* a POSIX threads function for some reason. We assume that
* it isn't joinable, but we do assume that it's
* (deferred) cancelable.
*/
self->implicit = 1;
self->detachState = PTHREAD_CREATE_DETACHED;
self->thread = GetCurrentThreadId ();
#ifdef NEED_DUPLICATEHANDLE
/*
* DuplicateHandle does not exist on WinCE.
*
* NOTE:
* GetCurrentThread only returns a pseudo-handle
* which is only valid in the current thread context.
* Therefore, you should not pass the handle to
* other threads for whatever purpose.
*/
self->threadH = GetCurrentThread ();
#else
if (!DuplicateHandle (GetCurrentProcess (),
GetCurrentThread (),
GetCurrentProcess (),
&self->threadH,
0, FALSE, DUPLICATE_SAME_ACCESS))
{
/* Thread structs are never freed. */
ptw32_threadReusePush (self);
return (NULL);
}
#endif
/*
* No need to explicitly serialise access to sched_priority
* because the new handle is not yet public.
*/
self->sched_priority = GetThreadPriority (self->threadH);
}
pthread_setspecific (ptw32_selfThreadKey, self);
}
return (self);
} /* pthread_self */
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