Completes coding of the PWM module

git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4200 7fd9a85b-ad96-42d3-883c-3090e2eb8679

1 files changed, 138 insertions, 0 deletions

diff --git a/nuttx/sched/pthread_getschedparam.c b/nuttx/sched/pthread_getschedparam.c
new file mode 100644
index 000000000..462c6c320
--- /dev/null
+++ b/nuttx/sched/pthread_getschedparam.c
@@ -0,0 +1,138 @@
+/********************************************************************************************
+ * pthread_getschedparam.c
+ *
+ *   Copyright (C) 2007, 2008 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 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
+ *********************************************************************************************/
+
+/********************************************************************************************
+ * Function:  pthread_getschedparam
+ *
+ * Description:
+ *   The pthread_getschedparam() functions will get 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_getschedparam() function will retrieve the scheduling policy
+ *   and scheduling parameters for the thread whose thread ID is given by
+ *   'thread' and will store those values in 'policy' and 'param',
+ *   respectively. The priority value returned from pthread_getschedparam()
+ *   will be the value specified by the most recent pthread_setschedparam(),
+ *   pthread_setschedprio(), or pthread_create() call affecting the target
+ *   thread. It will not reflect any temporary adjustments to its priority (such
+ *   as might result of any priority inheritance, for example).
+ *
+ *   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.
+*
+ * Parameters:
+ *   thread - The ID of thread whose scheduling parameters will be queried.
+ *   policy - The location to store the thread's scheduling policy.
+ *   param  - The location to store the thread's priority.
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, the error code ESRCH if the value specified
+ *   by thread does not refer to an existing thread.
+ *
+ * Assumptions:
+ *
+ ********************************************************************************************/
+
+int pthread_getschedparam(pthread_t thread, FAR int *policy, FAR struct sched_param *param)
+{
+  int ret;
+
+  sdbg("Thread ID=%d policy=0x%p param=0x%p\n", thread, policy, param);
+
+  if (!policy || !param)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      /* Get the schedparams of the thread. */
+
+      ret = sched_getparam((pid_t)thread, param);
+      if (ret != OK)
+        {
+          ret = EINVAL;
+        }
+
+      /* Return the policy. */
+
+      *policy = sched_getscheduler((pid_t)thread);
+      if (*policy == ERROR)
+        {
+          ret = *get_errno_ptr();
+        }
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+