Imported Upstream version 0.13.2+dsfg1

deps/w32-pthreads/pthread_detach.c

@@ -0,0 +1,136 @@
+/*
+ * pthread_detach.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_detach (pthread_t thread)
+     /*
+      * ------------------------------------------------------
+      * DOCPUBLIC
+      *      This function detaches the given thread.
+      *
+      * PARAMETERS
+      *      thread
+      *              an instance of a pthread_t
+      *
+      *
+      * DESCRIPTION
+      *      This function detaches the given thread. You may use it to
+      *      detach the main thread or to detach a joinable thread.
+      *      NOTE:   detached threads cannot be joined;
+      *              storage is freed immediately on termination.
+      *
+      * RESULTS
+      *              0               successfully detached the thread,
+      *              EINVAL          thread is not a joinable thread,
+      *              ENOSPC          a required resource has been exhausted,
+      *              ESRCH           no thread could be found for 'thread',
+      *
+      * ------------------------------------------------------
+      */
+{
+  int result;
+  BOOL destroyIt = PTW32_FALSE;
+  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
+    {
+      ptw32_mcs_local_node_t stateLock;
+      /*
+       * Joinable ptw32_thread_t structs are not scavenged until
+       * a join or detach is done. The thread may have exited already,
+       * but all of the state and locks etc are still there.
+       */
+      result = 0;
+
+      ptw32_mcs_lock_acquire (&tp->stateLock, &stateLock);
+      if (tp->state != PThreadStateLast)
+        {
+          tp->detachState = PTHREAD_CREATE_DETACHED;
+        }
+      else if (tp->detachState != PTHREAD_CREATE_DETACHED)
+        {
+          /*
+           * Thread is joinable and has exited or is exiting.
+           */
+          destroyIt = PTW32_TRUE;
+        }
+      ptw32_mcs_lock_release (&stateLock);
+    }
+
+  ptw32_mcs_lock_release(&node);
+
+  if (result == 0)
+    {
+      /* Thread is joinable */
+
+      if (destroyIt)
+	{
+	  /* The thread has exited or is exiting but has not been joined or
+	   * detached. Need to wait in case it's still exiting.
+	   */
+	  (void) WaitForSingleObject(tp->threadH, INFINITE);
+	  ptw32_threadDestroy (thread);
+	}
+    }
+
+  return (result);
+
+}				/* pthread_detach */