Imported Upstream version 0.13.2+dsfg1

deps/w32-pthreads/pthread_join.c

@@ -0,0 +1,157 @@
+/*
+ * pthread_join.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.,
+ *      51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#include "pthread.h"
+#include "implement.h"
+
+/*
+ * Not needed yet, but defining it should indicate clashes with build target
+ * environment that should be fixed.
+ */
+#if !defined(WINCE)
+#  include <signal.h>
+#endif
+
+
+int
+pthread_join (pthread_t thread, void **value_ptr)
+     /*
+      * ------------------------------------------------------
+      * DOCPUBLIC
+      *      This function waits for 'thread' to terminate and
+      *      returns the thread's exit value if 'value_ptr' is not
+      *      NULL. This also detaches the thread on successful
+      *      completion.
+      *
+      * PARAMETERS
+      *      thread
+      *              an instance of pthread_t
+      *
+      *      value_ptr
+      *              pointer to an instance of pointer to void
+      *
+      *
+      * DESCRIPTION
+      *      This function waits for 'thread' to terminate and
+      *      returns the thread's exit value if 'value_ptr' is not
+      *      NULL. This also detaches the thread on successful
+      *      completion.
+      *      NOTE:   detached threads cannot be joined or canceled
+      *
+      * RESULTS
+      *              0               'thread' has completed
+      *              EINVAL          thread is not a joinable thread,
+      *              ESRCH           no thread could be found with ID 'thread',
+      *              ENOENT          thread couldn't find it's own valid handle,
+      *              EDEADLK         attempt to join thread with self
+      *
+      * ------------------------------------------------------
+      */
+{
+  int result;
+  pthread_t self;
+  ptw32_thread_t * tp = (ptw32_thread_t *) thread.p;
+  ptw32_mcs_local_node_t node;
+
+  ptw32_mcs_lock_acquire(&ptw32_thread_reuse_lock, &node);
+
+  if (NULL == tp
+      || thread.x != tp->ptHandle.x)
+    {
+      result = ESRCH;
+    }
+  else if (PTHREAD_CREATE_DETACHED == tp->detachState)
+    {
+      result = EINVAL;
+    }
+  else
+    {
+      result = 0;
+    }
+
+  ptw32_mcs_lock_release(&node);
+
+  if (result == 0)
+    {
+      /* 
+       * The target thread is joinable and can't be reused before we join it.
+       */
+      self = pthread_self();
+
+      if (NULL == self.p)
+	{
+	  result = ENOENT;
+	}
+      else if (pthread_equal (self, thread))
+	{
+	  result = EDEADLK;
+	}
+      else
+	{
+	  /*
+	   * Pthread_join is a cancelation point.
+	   * If we are canceled then our target thread must not be
+	   * detached (destroyed). This is guarranteed because
+	   * pthreadCancelableWait will not return if we
+	   * are canceled.
+	   */
+	  result = pthreadCancelableWait (tp->threadH);
+
+	  if (0 == result)
+	    {
+	      if (value_ptr != NULL)
+		{
+		  *value_ptr = tp->exitStatus;
+		}
+
+	      /*
+	       * The result of making multiple simultaneous calls to
+	       * pthread_join() or pthread_detach() specifying the same
+	       * target is undefined.
+	       */
+	      result = pthread_detach (thread);
+	    }
+	  else
+	    {
+	      result = ESRCH;
+	    }
+	}
+    }
+
+  return (result);
+
+}				/* pthread_join */