| /* |
| * 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) 1999,2005 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" |
| |
| 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; |
| pthread_t nil = {NULL, 0}; |
| ptw32_thread_t * sp; |
| |
| #ifdef _UWIN |
| if (!ptw32_selfThreadKey) |
| return nil; |
| #endif |
| |
| sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey); |
| |
| if (sp != NULL) |
| { |
| self = sp->ptHandle; |
| } |
| else |
| { |
| /* |
| * Need to create an implicit 'self' for the currently |
| * executing thread. |
| */ |
| self = ptw32_new (); |
| sp = (ptw32_thread_t *) self.p; |
| |
| if (sp != 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. |
| */ |
| sp->implicit = 1; |
| sp->detachState = PTHREAD_CREATE_DETACHED; |
| sp->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. |
| */ |
| sp->threadH = GetCurrentThread (); |
| #else |
| if (!DuplicateHandle (GetCurrentProcess (), |
| GetCurrentThread (), |
| GetCurrentProcess (), |
| &sp->threadH, |
| 0, FALSE, DUPLICATE_SAME_ACCESS)) |
| { |
| /* |
| * Should not do this, but we have no alternative if |
| * we can't get a Win32 thread handle. |
| * Thread structs are never freed. |
| */ |
| ptw32_threadReusePush (self); |
| return nil; |
| } |
| #endif |
| |
| /* |
| * No need to explicitly serialise access to sched_priority |
| * because the new handle is not yet public. |
| */ |
| sp->sched_priority = GetThreadPriority (sp->threadH); |
| |
| pthread_setspecific (ptw32_selfThreadKey, (void *) sp); |
| } |
| } |
| |
| return (self); |
| |
| } /* pthread_self */ |