NOT everything is master-slave (really)

[simgrid.git] / examples / msg / process-suspend / process-suspend.c

diff --git a/examples/msg/process-suspend/process-suspend.c b/examples/msg/process-suspend/process-suspend.c
new file mode 100644 (file)
index 0000000..84da0a8
--- /dev/null
+++ b/examples/msg/process-suspend/process-suspend.c
@@ -0,0 +1,88 @@
+/* Copyright (c) 2007, 2009-2015. The SimGrid Team.
+ * All rights reserved.                                                     */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+#include "simgrid/msg.h"
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(msg_test, "Messages specific for this msg example");
+
+#define SLEEP(duration)                                 \
+  if (MSG_process_sleep(duration) != MSG_OK)            \
+    xbt_die("What's going on??? I failed to sleep!");
+
+/** @addtogroup MSG_examples
+ * 
+ * - <b>suspend/suspend.c</b>: Demonstrates how to suspend and resume processes using
+ *   @ref MSG_process_suspend and @ref MSG_process_resume.
+ */
+
+/** Lazy guy function. This process suspends itself asap.  */
+static int lazy_guy(int argc, char *argv[])
+{
+  XBT_INFO("Nobody's watching me ? Let's go to sleep.");
+  MSG_process_suspend(MSG_process_self());
+  XBT_INFO("Uuuh ? Did somebody call me ?");
+
+  XBT_INFO("Going to sleep...");
+  SLEEP(10.0);
+  XBT_INFO("Mmm... waking up.");
+
+  XBT_INFO("Going to sleep one more time...");
+  SLEEP(10.0);
+  XBT_INFO("Waking up once for all!");
+
+  XBT_INFO("Mmmh, goodbye now.");
+  return 0;
+}                               /* end_of_lazy_guy */
+
+/** Dream master function. This process creates a lazy_guy process and resumes it 10 seconds later. */
+static int dream_master(int argc, char *argv[])
+{
+  msg_process_t lazy = NULL;
+
+  XBT_INFO("Let's create a lazy guy.");
+  lazy = MSG_process_create("Lazy", lazy_guy, NULL, MSG_host_self());
+  XBT_INFO("Let's wait a little bit...");
+  SLEEP(10.0);
+  XBT_INFO("Let's wake the lazy guy up! >:) BOOOOOUUUHHH!!!!");
+  MSG_process_resume(lazy);
+
+  SLEEP(5.0);
+  XBT_INFO("Suspend the lazy guy while he's sleeping...");
+  MSG_process_suspend(lazy);
+  XBT_INFO("Let him finish his siesta.");
+  SLEEP(10.0);
+  XBT_INFO("Wake up, lazy guy!");
+  MSG_process_resume(lazy);
+
+  SLEEP(5.0);
+  XBT_INFO("Suspend again the lazy guy while he's sleeping...");
+  MSG_process_suspend(lazy);
+  XBT_INFO("This time, don't let him finish his siesta.");
+  SLEEP(2.0);
+  XBT_INFO("Wake up, lazy guy!");
+  MSG_process_resume(lazy);
+
+  XBT_INFO("OK, goodbye now.");
+  return 0;
+}                               /* end_of_dream_master */
+
+int main(int argc, char *argv[])
+{
+  msg_error_t res = MSG_OK;
+
+  MSG_init(&argc, argv);
+  xbt_assert(argc > 1, "Usage: %s platform_file\n\tExample: %s msg_platform.xml\n", argv[0], argv[0]);
+
+  MSG_create_environment(argv[1]);
+  MSG_function_register("dream_master", dream_master);
+  xbt_dynar_t hosts = MSG_hosts_as_dynar();
+  MSG_process_create("dream_master", dream_master, NULL, xbt_dynar_getfirst_as(hosts, msg_host_t));
+  xbt_dynar_free(&hosts);
+  res = MSG_main();
+
+  XBT_INFO("Simulation time %g", MSG_get_clock());
+  return res != MSG_OK;
+}