1 files changed, 127 insertions, 0 deletions
diff --git a/nuttx/sched/pthread_setcancelstate.c b/nuttx/sched/pthread_setcancelstate.c
new file mode 100644
index 0000000000..4a23b10680
--- /dev/null
+++ b/nuttx/sched/pthread_setcancelstate.c
@@ -0,0 +1,127 @@
+/**************************************************************************
+ * pthread_setcancelstate.c
+ *
+ *   Copyright (C) 2007 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name Gregory Nutt nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ **************************************************************************/
+
+/**************************************************************************
+ * Included Files
+ **************************************************************************/
+
+#include <pthread.h>
+#include <errno.h>
+#include "os_internal.h"
+
+/**************************************************************************
+ * Private Definitions
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Types
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Function Prototypes
+ **************************************************************************/
+
+/**************************************************************************
+ * Global Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Variables
+ **************************************************************************/
+
+/**************************************************************************
+ * Private Functions
+ **************************************************************************/
+
+/**************************************************************************
+ * Public Functions
+ **************************************************************************/
+
+int pthread_setcancelstate(int state, int *oldstate)
+{
+  _TCB *tcb = (_TCB*)g_readytorun.head;
+  int ret = OK;
+
+  /* Suppress context changes for a bit so that the flags are stable. (the
+   * flags should not change in interrupt handling).
+   */
+
+  sched_lock();
+
+  /* Return the current state if so requrested */
+
+  if (oldstate)
+    {
+      if ((tcb->flags & TCB_FLAG_NONCANCELABLE) != 0)
+        {
+          *oldstate = PTHREAD_CANCEL_DISABLE;
+        }
+      else
+        {
+          *oldstate = PTHREAD_CANCEL_ENABLE;
+        }
+    }
+
+  /* Set the new cancellation state */
+
+  if (state == PTHREAD_CANCEL_ENABLE)
+    {
+      unsigned flags = tcb->flags;
+
+      /* Clear the non-cancelable and cancel pending flags */
+
+      tcb->flags &= ~(TCB_FLAG_NONCANCELABLE|TCB_FLAG_CANCEL_PENDING);
+
+      /* If the cancel was pending, then just exit as requested */
+
+      if (flags & TCB_FLAG_CANCEL_PENDING)
+        {
+          pthread_exit(PTHREAD_CANCELED);
+        }
+    }
+  else if (state == PTHREAD_CANCEL_DISABLE)
+    {
+      /* Set the non-cancelable state */
+
+      tcb->flags |= TCB_FLAG_NONCANCELABLE;
+    }
+  else
+    {
+      ret = EINVAL;
+    }
+
+  sched_unlock();
+  return ret;
+}