1 files changed, 142 insertions, 0 deletions
diff --git a/nuttx/sched/pthread_setschedparam.c b/nuttx/sched/pthread_setschedparam.c
new file mode 100644
index 000000000..019a7c7a5
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+++ b/nuttx/sched/pthread_setschedparam.c
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+/****************************************************************************
+ * pthread_setschedparam.c
+ *
+ *   Copyright (C) 2007, 2008, 2012 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 <sys/types.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_setschedparam
+ *
+ * Description:
+ *   The pthread_setschedparam() functions will set the scheduling policy
+ *   and parameters of threads. For SCHED_FIFO and SCHED_RR, the only
+ *   required member of the sched_param structure is the priority
+ *   sched_priority.
+ *
+ *   The pthread_setschedparam() function will set the scheduling policy
+ *   and associated scheduling parameters for the thread whose thread ID
+ *   is given by 'thread' to the policy and associated parameters provided
+ *   in 'policy' and 'param', respectively.
+ *
+ *   The policy parameter may have the value SCHED_FIFO, or SCHED_RR
+ *   (SCHED_OTHER and SCHED_SPORADIC, in particular, are not supported).
+ *   The SCHED_FIFO and SCHED_RR policies will have a single scheduling
+ *   parameter, sched_priority.
+ *
+ *   If the pthread_setschedparam() function fails, the scheduling parameters
+ *   will not be changed for the target thread.
+ *
+ * Parameters:
+ *   thread - The ID of thread whose scheduling parameters will be modified.
+ *   policy - The new scheduling policy of the thread.  Either SCHED_FIFO or
+ *            SCHED_RR. SCHED_OTHER and SCHED_SPORADIC are not supported.
+ *   param  - Provides the new priority of the thread.
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code identifying the cause of the
+ *   failure:
+ *
+ *   EINVAL  The value specified by 'policy' or one of the scheduling
+ *           parameters associated with the scheduling policy 'policy' is
+ *           invalid.
+ *   ENOTSUP An attempt was made to set the policy or scheduling parameters
+ *           to an unsupported value (SCHED_OTHER and SCHED_SPORADIC in
+ *           particular are not supported)
+ *   EPERM   The caller does not have the appropriate permission to set either
+ *           the scheduling parameters or the scheduling policy of the
+ *           specified thread. Or, the implementation does not allow the
+ *           application to modify one of the parameters to the value
+ *           specified.
+ *   ESRCH   The value specified by thread does not refer to a existing thread.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_setschedparam(pthread_t thread, int policy, FAR const struct sched_param *param)
+{
+  int ret;
+
+  sdbg("thread ID=%d policy=%d param=0x%p\n", thread, policy, param);
+
+  /* Set the errno to some non-zero value (failsafe) */
+
+  set_errno(EINVAL);
+
+  /* Let sched_setscheduler do all of the work */
+
+  ret = sched_setscheduler((pid_t)thread, policy, param);
+  if (ret != OK)
+    {
+      /* If sched_setscheduler() fails, return the errno */
+
+      ret = get_errno();
+    }
+
+  return ret;
+}