Changed needed to fix issues with task_restart()

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5615 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 197 insertions, 0 deletions

diff --git a/apps/examples/ostest/restart.c b/apps/examples/ostest/restart.c
new file mode 100644
index 000000000..335aa3694
--- /dev/null
+++ b/apps/examples/ostest/restart.c
@@ -0,0 +1,197 @@
+/****************************************************************************
+ * examples/ostest/restart.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 <stdbool.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sched.h>
+#include <errno.h>
+
+#include "ostest.h"
+
+#ifdef CONFIG_SCHED_WAITPID
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define PRIORITY    100
+#define NARGS         3
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static char * const g_argv[NARGS+1] =
+{
+  "This is argument 1",
+  "Argument 2 here",
+  "Lastly, the 3rd argument",
+  NULL
+};
+
+static const char g_varname[] = "VarName";
+static const char g_varvalue[] = "VarValue";
+static bool g_restarted;
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static int restart_main(int argc, char *argv[])
+{
+#ifndef CONFIG_DISABLE_ENVIRON
+  char *actual;
+#endif
+  int i;
+
+  printf("restart_main: Started with argc=%d\n", argc);
+
+  /* Verify passed arguments */
+
+  if (argc != NARGS + 1)
+    {
+      printf("restart_main: ERROR: Expected argc=%d got argc=%d\n",
+             NARGS+1, argc);
+    }
+
+  for (i = 0; i <= NARGS; i++)
+    {
+      printf("restart_main: argv[%d]=\"%s\"\n", i, argv[i]);
+      if (i > 0 && strcmp(argv[i], g_argv[i-1]) != 0)
+        {
+          printf("restart_main: ERROR: Expected argv[%d]=\"%s\" got \"%s\"\n",
+                 i, argv[i], g_argv[i-1]);
+        }
+    }
+
+#ifndef CONFIG_DISABLE_ENVIRON
+  actual = getenv(g_varname);
+  if (actual)
+    {
+      if (strcmp(actual, g_varvalue) == 0)
+        {
+          printf("restart_main: Variable=%s has value=%s\n", g_varname,
+                 g_varvalue);
+        }
+      else
+        {
+          printf("restart_main: ERROR Variable=%s has the wrong value\n", g_varname);
+          printf("restart_main:       found=%s expected=%s\n", actual, g_varvalue);
+        }
+    }
+  else
+    {
+      printf("restart_main: ERROR: Variable=%s has no value\n", g_varname);
+    }
+#endif
+
+  /* Were we restarted? */
+
+  if (!g_restarted)
+    {
+      /* No.. this is the first time we have been here */
+
+      g_restarted = true;
+
+      /* Now just wait to be restarted */
+
+      for (;;)
+        {
+          sleep(2);
+          printf("restart_main: I am still here\n");
+        }
+    }
+
+  return 0; /* Won't get here */
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+void restart_test(void)
+{
+  int ret;
+
+  /* Start the children and wait for first one to complete */
+
+  printf("\nTest task_restart()\n");
+  g_restarted = false;
+
+  /* Set up an environment variables */
+
+#ifndef CONFIG_DISABLE_ENVIRON
+  printf("restart_main: setenv(%s, %s, TRUE)\n", g_varname, g_varvalue);
+  setenv(g_varname, g_varvalue, TRUE);  /* Variable1=GoodValue1 */
+#endif
+
+  /* Start the task */
+
+  ret = TASK_CREATE("ostest", PRIORITY, STACKSIZE, restart_main, g_argv);
+  if (ret < 0)
+    {
+      printf("restart_main: ERROR Failed to start restart_main\n");
+    }
+  else
+    {
+      pid_t pid = ret;
+
+      printf("restart_main: Started restart_main at PID=%d\n", pid);
+
+      /* Wait a bit and restart the task */
+
+      sleep(5);
+      ret = task_restart(pid);
+      if (ret < 0)
+        {
+          printf("restart_main:  ERROR: task_restart failed\n");
+        }
+
+      sleep(1);
+    }
+
+  printf("restart_main: Exitting\n");
+}
+
+#endif /* CONFIG_SCHED_WAITPID */