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Diffstat (limited to 'pthreads/pthread_self.c')
| -rw-r--r-- | pthreads/pthread_self.c | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/pthreads/pthread_self.c b/pthreads/pthread_self.c new file mode 100644 index 000000000..d72a0971d --- /dev/null +++ b/pthreads/pthread_self.c @@ -0,0 +1,138 @@ +/* + * 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 */ |