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authormarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
committermarha <marha@users.sourceforge.net>2009-06-28 22:07:26 +0000
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Diffstat (limited to 'pthreads/pthread_self.c')
-rw-r--r--pthreads/pthread_self.c138
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 */