From a416ab17ecf9f2cb0f1e3f7bd645a8d1ce690ca2 Mon Sep 17 00:00:00 2001
From: rpj <rpj>
Date: Mon, 18 Feb 2002 03:16:52 +0000
Subject: Major reorganisation of source code; new routine and tests added.

---
 pthread_setcancelstate.c | 125 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 pthread_setcancelstate.c

(limited to 'pthread_setcancelstate.c')

diff --git a/pthread_setcancelstate.c b/pthread_setcancelstate.c
new file mode 100644
index 0000000..dcf6537
--- /dev/null
+++ b/pthread_setcancelstate.c
@@ -0,0 +1,125 @@
+/*
+ * pthread_setcancelstate.c
+ *
+ * Description:
+ * POSIX thread functions related to thread cancellation.
+ *
+ * --------------------------------------------------------------------------
+ *
+ *      Pthreads-win32 - POSIX Threads Library for Win32
+ *      Copyright(C) 1998 John E. Bossom
+ *      Copyright(C) 1999,2002 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"
+
+
+int
+pthread_setcancelstate (int state, int *oldstate)
+     /*
+      * ------------------------------------------------------
+      * DOCPUBLIC
+      *      This function atomically sets the calling thread's
+      *      cancelability state to 'state' and returns the previous
+      *      cancelability state at the location referenced by
+      *      'oldstate'
+      *
+      * PARAMETERS
+      *      state,
+      *      oldstate
+      *              PTHREAD_CANCEL_ENABLE
+      *                      cancellation is enabled,
+      *
+      *              PTHREAD_CANCEL_DISABLE
+      *                      cancellation is disabled
+      *
+      *
+      * DESCRIPTION
+      *      This function atomically sets the calling thread's
+      *      cancelability state to 'state' and returns the previous
+      *      cancelability state at the location referenced by
+      *      'oldstate'.
+      *
+      *      NOTES:
+      *      1)      Use to disable cancellation around 'atomic' code that
+      *              includes cancellation points
+      *
+      * COMPATIBILITY ADDITIONS
+      *      If 'oldstate' is NULL then the previous state is not returned
+      *      but the function still succeeds. (Solaris)
+      *
+      * RESULTS
+      *              0               successfully set cancelability type,
+      *              EINVAL          'state' is invalid
+      *
+      * ------------------------------------------------------
+      */
+{
+  int result = 0;
+  pthread_t self = pthread_self();
+
+  if (self == NULL
+      || (state != PTHREAD_CANCEL_ENABLE
+          && state != PTHREAD_CANCEL_DISABLE))
+    {
+      return EINVAL;
+    }
+
+  /*
+   * Lock for async-cancel safety.
+   */
+  (void) pthread_mutex_lock(&self->cancelLock);
+
+  if (oldstate != NULL)
+    {
+      *oldstate = self->cancelState;
+    }
+
+  self->cancelState = state;
+
+  /*
+   * Check if there is a pending asynchronous cancel
+   */
+  if (state == PTHREAD_CANCEL_ENABLE
+      && self->cancelType == PTHREAD_CANCEL_ASYNCHRONOUS
+      && WaitForSingleObject(self->cancelEvent, 0) == WAIT_OBJECT_0)
+    {
+      self->state = PThreadStateCanceling;
+      self->cancelState = PTHREAD_CANCEL_DISABLE;
+      ResetEvent(self->cancelEvent);
+      (void) pthread_mutex_unlock(&self->cancelLock);
+      ptw32_throw(PTW32_EPS_CANCEL);
+
+      /* Never reached */
+    }
+
+  (void) pthread_mutex_unlock(&self->cancelLock);
+
+  return (result);
+
+}                               /* pthread_setcancelstate */
+
-- 
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