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+/****************************************************************************
+ * examples/nxflat/tests/task/parent.c
+ *
+ * Copyright (C) 2009 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 <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sched.h>
+#include <semaphore.h>
+#include <errno.h>
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static char child_name[] = "child";
+static char child_arg[] = "Hello from your parent!";
+static sem_t g_sem;
+
+#if CONFIG_TASK_NAME_SIZE == 0
+static char no_name[] = "<noname>";
+#endif
+
+/****************************************************************************
+ * Privite Functions
+ ****************************************************************************/
+
+/* NOTE: it is necessary for functions that are referred to by function pointers
+ * pointer to be declared with global scope (at least for ARM). Otherwise,
+ * a relocation type that is not supported by NXFLAT is generated by GCC.
+ */
+
+ int child_task(int argc, char **argv)
+{
+ printf("Child: execv was successful!\n");
+ printf("Child: argc=%d\n", argc);
+
+ if (argc != 2)
+ {
+ printf("Child: expected argc to be 2\n");
+ printf("Child: Exit-ting with status=2\n");
+ exit(2);
+ }
+ printf("Child: argv[0]=\"%s\"\n", argv[0]);
+
+#if CONFIG_TASK_NAME_SIZE == 0
+ if (strcmp(argv[0], no_name) != 0)
+ {
+ printf("Child: expected argv[0] to be \"%s\"\n", no_name);
+ printf("Child: Exit-ting with status=3\n");
+ exit(3);
+ }
+#else
+ if (strncmp(argv[0], child_name, CONFIG_TASK_NAME_SIZE) != 0)
+ {
+ printf("Child: expected argv[0] to be \"%s\"\n", child_name);
+ printf("Child: Exit-ting with status=3\n");
+ exit(3);
+ }
+#endif
+
+ printf("Child: argv[1]=\"%s\"\n", argv[1]);
+
+ if (strcmp(argv[1], child_arg) != 0)
+ {
+ printf("Child: expected argv[1] to be \"%s\"\n", child_arg);
+ printf("Child: Exit-ting with status=4\n");
+ exit(4);
+ }
+
+ printf("Child: Exit-ting with status=0\n");
+ sem_post(&g_sem);
+ return 0;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+int main(int argc, char **argv)
+{
+ pid_t parent_pid = getpid();
+ char *child_argv[2];
+ pid_t child_pid;
+
+ printf("Parent: Started, pid=%d\n", parent_pid);
+
+ sem_init(&g_sem, 0, 0);
+
+ printf("Parent: Calling task_create()\n");
+
+ child_argv[0] = child_arg;
+ child_argv[1] = 0;
+ child_pid = task_create(child_name, 50, 512, child_task, (const char**)child_argv);
+ if (child_pid < 0)
+ {
+ printf("Parent: task_create failed: %d\n", errno);
+ }
+
+ printf("Parent: Waiting for child (pid=%d)\n", child_pid);
+ sem_wait(&g_sem);
+ printf("Parent: Exit-ing\n");
+ sem_destroy(&g_sem);
+ return 0;
+}
+