1 files changed, 145 insertions, 0 deletions
diff --git a/nuttx/sched/pthread_condbroadcast.c b/nuttx/sched/pthread_condbroadcast.c
new file mode 100644
index 000000000..05f4bb483
--- /dev/null
+++ b/nuttx/sched/pthread_condbroadcast.c
@@ -0,0 +1,145 @@
+/****************************************************************************
+ * sched/pthread_condbroadcast.c
+ *
+ *   Copyright (C) 2007-2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * 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 NuttX 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 <nuttx/config.h>
+
+#include <pthread.h>
+#include <sched.h>
+#include <errno.h>
+#include <debug.h>
+
+#include "pthread_internal.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: pthread_cond_broadcast
+ *
+ * Description:
+ *    A thread broadcast on a condition variable.
+ *
+ * Parameters:
+ *   None
+ *
+ * Return Value:
+ *   None
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_cond_broadcast(FAR pthread_cond_t *cond)
+{
+  int ret = OK;
+  int sval;
+
+  sdbg("cond=0x%p\n", cond);
+
+  if (!cond)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      /* Disable pre-emption until all of the waiting threads have been
+       * restarted. This is necessary to assure that the sval behaves as
+       * expected in the following while loop
+       */
+
+      sched_lock();
+
+      /* Get the current value of the semaphore */
+
+      if (sem_getvalue((sem_t*)&cond->sem, &sval) != OK)
+        {
+          ret = EINVAL;
+        }
+      else
+        {
+          /* Loop until all of the waiting threads have been restarted. */
+
+          while (sval < 0)
+            {
+              /* If the value is less than zero (meaning that one or more
+               * thread is waiting), then post the condition semaphore.
+               * Only the highest priority waiting thread will get to execute
+               */
+
+              ret = pthread_givesemaphore((sem_t*)&cond->sem);
+
+              /* Increment the semaphore count (as was done by the
+               * above post).
+               */
+
+              sval++;
+            }
+        }
+
+      /* Now we can let the restarted threads run */
+
+      sched_unlock();
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+
+