From e6f1797e9e9925ae7f9dda54806ef8f52ae3ed07 Mon Sep 17 00:00:00 2001
From: rpj <rpj>
Date: Mon, 11 Feb 2002 01:53:22 +0000
Subject: Splitting files. See ChangeLog file for details.

---
 w32_CancelableWait.c | 168 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 168 insertions(+)
 create mode 100644 w32_CancelableWait.c

(limited to 'w32_CancelableWait.c')

diff --git a/w32_CancelableWait.c b/w32_CancelableWait.c
new file mode 100644
index 0000000..ba1c92a
--- /dev/null
+++ b/w32_CancelableWait.c
@@ -0,0 +1,168 @@
+/*
+ * w32_CancelableWait.c
+ *
+ * Description:
+ * This translation unit implements miscellaneous thread functions.
+ *
+ * --------------------------------------------------------------------------
+ *
+ *	Pthreads-win32 - POSIX Threads Library for Win32
+ *	Copyright(C) 1998 John E. Bossom
+ *	Copyright(C) 1999,2002 Pthreads-win32 contributors
+ * 
+ *	Contact Email: rpj@ise.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"
+
+
+static INLINE int
+ptw32_cancelable_wait (HANDLE waitHandle, DWORD timeout)
+     /*
+      * -------------------------------------------------------------------
+      * This provides an extra hook into the pthread_cancel
+      * mechanism that will allow you to wait on a Windows handle and make it a
+      * cancellation point. This function blocks until the given WIN32 handle is
+      * signaled or pthread_cancel has been called. It is implemented using
+      * WaitForMultipleObjects on 'waitHandle' and a manually reset WIN32
+      * event used to implement pthread_cancel.
+      * 
+      * Given this hook it would be possible to implement more of the cancellation
+      * points.
+      * -------------------------------------------------------------------
+      */
+{
+  int result;
+  pthread_t self;
+  HANDLE handles[2];
+  DWORD nHandles = 1;
+  DWORD status;
+
+  handles[0] = waitHandle;
+
+  if ((self = pthread_self()) != NULL)
+    {
+      /*
+       * Get cancelEvent handle
+       */
+      if (self->cancelState == PTHREAD_CANCEL_ENABLE)
+	{
+
+	  if ((handles[1] = self->cancelEvent) != NULL)
+	    {
+	      nHandles++;
+	    }
+	}
+    }
+  else
+    {
+      handles[1] = NULL;
+    }
+
+  status = WaitForMultipleObjects (
+				    nHandles,
+				    handles,
+				    FALSE,
+				    timeout);
+
+
+  if (status == WAIT_FAILED)
+    {
+      result = EINVAL;
+    }
+  else if (status == WAIT_TIMEOUT)
+    {
+      result = ETIMEDOUT;
+    }
+  else if (status == WAIT_ABANDONED_0)
+    {
+      result = EINVAL;
+    }
+  else
+    {
+      /*
+       * Either got the handle or the cancel event
+       * was signaled
+       */
+      switch (status - WAIT_OBJECT_0)
+	{
+
+	case 0:
+	  /*
+	   * Got the handle
+	   */
+	  result = 0;
+	  break;
+
+	case 1:
+	  /*
+	   * Got cancel request
+	   */
+	  ResetEvent (handles[1]);
+
+	  if (self != NULL && !self->implicit)
+	    {
+	      /*
+	       * Thread started with pthread_create.
+	       * Make sure we haven't been async-canceled in the meantime.
+	       */
+	      (void) pthread_mutex_lock(&self->cancelLock);
+	      if (self->state < PThreadStateCanceling)
+		{
+		  self->state = PThreadStateCanceling;
+		  self->cancelState = PTHREAD_CANCEL_DISABLE;
+		  (void) pthread_mutex_unlock(&self->cancelLock);
+		  ptw32_throw(PTW32_EPS_CANCEL);
+
+		  /* Never reached */
+		}
+	      (void) pthread_mutex_unlock(&self->cancelLock);
+	    }
+
+	  /* Should never get to here. */
+	  result = EINVAL;
+	  break;
+
+	default:
+	  result = EINVAL;
+	  break;
+	}
+    }
+
+  return (result);
+
+}				/* CancelableWait */
+
+int
+pthreadCancelableWait (HANDLE waitHandle)
+{
+  return (ptw32_cancelable_wait(waitHandle, INFINITE));
+}
+
+int
+pthreadCancelableTimedWait (HANDLE waitHandle, DWORD timeout)
+{
+  return (ptw32_cancelable_wait(waitHandle, timeout));
+}
-- 
cgit v1.2.3