From 2ab3d99967d68c79351fe2a3df22c445447e3010 Mon Sep 17 00:00:00 2001
From: Michał Cichoń <michcic@gmail.com>
Date: Tue, 15 Nov 2011 22:28:48 +0100
Subject: Initial import.

---
 pthreads/src/pthread_setcanceltype.c | 126 +++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 pthreads/src/pthread_setcanceltype.c

(limited to 'pthreads/src/pthread_setcanceltype.c')

diff --git a/pthreads/src/pthread_setcanceltype.c b/pthreads/src/pthread_setcanceltype.c
new file mode 100644
index 0000000..72b0af5
--- /dev/null
+++ b/pthreads/src/pthread_setcanceltype.c
@@ -0,0 +1,126 @@
+/*
+ * pthread_setcanceltype.c
+ *
+ * Description:
+ * POSIX thread functions related to thread cancellation.
+ *
+ * --------------------------------------------------------------------------
+ *
+ *      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"
+
+
+int
+pthread_setcanceltype (int type, int *oldtype)
+     /*
+      * ------------------------------------------------------
+      * DOCPUBLIC
+      *      This function atomically sets the calling thread's
+      *      cancelability type to 'type' and returns the previous
+      *      cancelability type at the location referenced by
+      *      'oldtype'
+      *
+      * PARAMETERS
+      *      type,
+      *      oldtype
+      *              PTHREAD_CANCEL_DEFERRED
+      *                      only deferred cancelation is allowed,
+      *
+      *              PTHREAD_CANCEL_ASYNCHRONOUS
+      *                      Asynchronous cancellation is allowed
+      *
+      *
+      * DESCRIPTION
+      *      This function atomically sets the calling thread's
+      *      cancelability type to 'type' and returns the previous
+      *      cancelability type at the location referenced by
+      *      'oldtype'
+      *
+      *      NOTES:
+      *      1)      Use with caution; most code is not safe for use
+      *              with asynchronous cancelability.
+      *
+      * COMPATIBILITY ADDITIONS
+      *      If 'oldtype' is NULL then the previous type is not returned
+      *      but the function still succeeds. (Solaris)
+      *
+      * RESULTS
+      *              0               successfully set cancelability type,
+      *              EINVAL          'type' is invalid
+      *
+      * ------------------------------------------------------
+      */
+{
+  ptw32_mcs_local_node_t stateLock;
+  int result = 0;
+  pthread_t self = pthread_self ();
+  ptw32_thread_t * sp = (ptw32_thread_t *) self.p;
+
+  if (sp == NULL
+      || (type != PTHREAD_CANCEL_DEFERRED
+	  && type != PTHREAD_CANCEL_ASYNCHRONOUS))
+    {
+      return EINVAL;
+    }
+
+  /*
+   * Lock for async-cancel safety.
+   */
+  ptw32_mcs_lock_acquire (&sp->stateLock, &stateLock);
+
+  if (oldtype != NULL)
+    {
+      *oldtype = sp->cancelType;
+    }
+
+  sp->cancelType = type;
+
+  /*
+   * Check if there is a pending asynchronous cancel
+   */
+  if (sp->cancelState == PTHREAD_CANCEL_ENABLE
+      && type == PTHREAD_CANCEL_ASYNCHRONOUS
+      && WaitForSingleObject (sp->cancelEvent, 0) == WAIT_OBJECT_0)
+    {
+      sp->state = PThreadStateCanceling;
+      sp->cancelState = PTHREAD_CANCEL_DISABLE;
+      ResetEvent (sp->cancelEvent);
+      ptw32_mcs_lock_release (&stateLock);
+      ptw32_throw (PTW32_EPS_CANCEL);
+
+      /* Never reached */
+    }
+
+  ptw32_mcs_lock_release (&stateLock);
+
+  return (result);
+
+}				/* pthread_setcanceltype */
-- 
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