--- /dev/null
+/* Copyright (c) 2010-2020. 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/actor.h"
+#include "simgrid/comm.h"
+#include "simgrid/engine.h"
+#include "simgrid/forward.h"
+#include "simgrid/mailbox.h"
+#include "xbt/asserts.h"
+#include "xbt/log.h"
+#include "xbt/str.h"
+
+#include <stdio.h> /* snprintf */
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(comm_waitany, "Messages specific for this example");
+
+static void sender(int argc, char* argv[])
+{
+ xbt_assert(argc == 4, "Expecting 3 parameters from the XML deployment file but got %d", argc);
+ long messages_count = xbt_str_parse_int(argv[1], "Invalid message count: %s");
+ long msg_size = xbt_str_parse_int(argv[2], "Invalid message size: %s");
+ long receivers_count = xbt_str_parse_int(argv[3], "Invalid amount of receivers: %s");
+
+ /* Array in which we store all ongoing communications */
+ sg_comm_t* pending_comms = xbt_malloc(sizeof(sg_comm_t) * (messages_count + receivers_count));
+ int pending_comms_count = 0;
+
+ /* Make an array of the mailboxes to use */
+ sg_mailbox_t* mboxes = xbt_malloc(sizeof(sg_mailbox_t) * receivers_count);
+ for (long i = 0; i < receivers_count; i++) {
+ char mailbox_name[80];
+ snprintf(mailbox_name, 79, "receiver-%ld", i);
+ sg_mailbox_t mbox = sg_mailbox_by_name(mailbox_name);
+ mboxes[i] = mbox;
+ }
+
+ /* Start dispatching all messages to receivers, in a round robin fashion */
+ for (int i = 0; i < messages_count; i++) {
+ char msg_content[80];
+ snprintf(msg_content, 79, "Message %d", i);
+ sg_mailbox_t mbox = mboxes[i % receivers_count];
+ XBT_INFO("Send '%s' to '%s'", msg_content, sg_mailbox_get_name(mbox));
+
+ /* Create a communication representing the ongoing communication, and store it in pending_comms */
+ pending_comms[pending_comms_count++] = sg_mailbox_put_async(mbox, xbt_strdup(msg_content), msg_size);
+ }
+ /* Start sending messages to let the workers know that they should stop */
+ for (int i = 0; i < receivers_count; i++) {
+ XBT_INFO("Send 'finalize' to 'receiver-%d'", i);
+ char* end_msg = xbt_strdup("finalize");
+ sg_mailbox_t mbox = mboxes[i % receivers_count];
+ pending_comms[pending_comms_count++] = sg_mailbox_put_async(mbox, end_msg, 0);
+ }
+
+ XBT_INFO("Done dispatching all messages");
+
+ /* Now that all message exchanges were initiated, wait for their completion, in order of termination.
+ *
+ * This loop waits for first terminating message with wait_any() and remove it from the array (with a memmove),
+ * until all comms are terminated.
+ * Even in this simple example, the pending comms do not terminate in the exact same order of creation.
+ */
+ while (pending_comms_count != 0) {
+ int changed_pos = sg_comm_wait_any(pending_comms, pending_comms_count);
+ memmove(pending_comms + changed_pos, pending_comms + changed_pos + 1,
+ sizeof(sg_comm_t) * (pending_comms_count - changed_pos - 1));
+ pending_comms_count--;
+
+ if (changed_pos != 0)
+ XBT_INFO("Remove the %dth pending comm: it terminated earlier than another comm that was initiated first.",
+ changed_pos);
+ }
+
+ free(pending_comms);
+ free(mboxes);
+
+ XBT_INFO("Goodbye now!");
+}
+
+static void receiver(int argc, char* argv[])
+{
+ xbt_assert(argc == 2, "Expecting one parameter from the XML deployment file but got %d", argc);
+ int id = xbt_str_parse_int(argv[1], "ID should be numerical, not %s");
+ char mailbox_name[80];
+ snprintf(mailbox_name, 79, "receiver-%d", id);
+ sg_mailbox_t mbox = sg_mailbox_by_name(mailbox_name);
+ XBT_INFO("Wait for my first message on '%s'", mailbox_name);
+ while (1) {
+ char* received = (char*)sg_mailbox_get(mbox);
+ XBT_INFO("I got a '%s'.", received);
+ if (!strcmp(received, "finalize")) { // If it's a finalize message, we're done
+ xbt_free(received);
+ break;
+ }
+ xbt_free(received);
+ }
+
+ XBT_INFO("I'm done. See you!");
+}
+
+int main(int argc, char* argv[])
+{
+ simgrid_init(&argc, argv);
+ xbt_assert(argc > 2,
+ "Usage: %s platform_file deployment_file\n"
+ "\tExample: %s msg_platform.xml msg_deployment.xml\n",
+ argv[0], argv[0]);
+
+ simgrid_load_platform(argv[1]);
+
+ simgrid_register_function("sender", sender);
+ simgrid_register_function("receiver", receiver);
+ simgrid_load_deployment(argv[2]);
+
+ simgrid_run();
+ XBT_INFO("Simulation time %g", simgrid_get_clock());
+
+ return 0;
+}
