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+/*
+ * 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 */