1 files changed, 118 insertions, 0 deletions
diff --git a/nuttx/libc/wqueue/work_usrstart.c b/nuttx/libc/wqueue/work_usrstart.c
new file mode 100644
index 000000000..b472afc8d
--- /dev/null
+++ b/nuttx/libc/wqueue/work_usrstart.c
@@ -0,0 +1,118 @@
+/****************************************************************************
+ * libc/wqueue/work_usrstart.c
+ *
+ *   Copyright (C) 2013 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 <sched.h>
+#include <errno.h>
+#include <assert.h>
+#include <debug.h>
+
+#include <nuttx/wqueue.h>
+
+#if defined(CONFIG_SCHED_WORKQUEUE) && defined(CONFIG_SCHED_USRWORK)
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+/****************************************************************************
+ * Name: work_usrstart
+ *
+ * Description:
+ *   Start the user mode work queue.
+ *
+ * Input parameters:
+ *   None
+ *
+ * Returned Value:
+ *   The task ID of the worker thread is returned on success.  A negated
+ *   errno value is returned on failure.
+ *
+ ****************************************************************************/
+
+int work_usrstart(void)
+{
+  int errcode;
+
+  DEBUGASSERT(g_usrwork[USRWORK] == NULL);
+
+  /* Start a lower priority worker thread for other, non-critical continuation
+   * tasks
+   */
+
+  svdbg("Starting user-mode worker thread\n");
+
+  g_usrwork[USRWORK].pid = TASK_CREATE("usrwork",
+                                       CONFIG_SCHED_USRWORKPRIORITY,
+                                       CONFIG_SCHED_USRWORKSTACKSIZE,
+                                       (main_t)work_usrthread,
+                                       (FAR char * const *)NULL);
+
+  errcode = errno;
+  ASSERT(g_usrwork[USRWORK].pid > 0);
+  if (g_usrwork[USRWORK].pid < 0)
+    {
+      sdbg("task_create failed: %d\n", errcode);
+      return -errcode;
+    }
+
+  return g_usrwork[USRWORK].pid;
+}
+
+#endif /* CONFIG_SCHED_WORKQUEUE && CONFIG_SCHED_USRWORK */