-/* Copyright (c) 2010-2016. The SimGrid Team. All rights reserved. */
+/* Copyright (c) 2010-2017. 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"
+/* This example shows how to use asynchronous communications.
+ *
+ * The sender initiate all the messages it wants to send, and then block for their completion.
+ * All messages thus occurs concurrently.
+ *
+ * On the receiver side, the reception is synchronous.
+ *
+ * TODO: this example is supposed to test the waitall function, but this is not ported to s4u yet.
+ *
+ */
+
+#include "simgrid/s4u.hpp"
+#include "xbt/str.h"
+#include <cstdlib>
+#include <iostream>
XBT_LOG_NEW_DEFAULT_CATEGORY(msg_async_waitall, "Messages specific for this msg example");
class sender {
+ long messages_count;
+ long receivers_count;
+ double msg_size; /* in bytes */
+
public:
explicit sender(std::vector<std::string> args)
{
xbt_assert(args.size()== 4, "This function expects 5 parameters from the XML deployment file");
- long number_of_tasks = xbt_str_parse_int(args[0].c_str(), "Invalid amount of tasks: %s");
- double task_comp_size = xbt_str_parse_double(args[1].c_str(), "Invalid computational size: %s");
- double task_comm_size = xbt_str_parse_double(args[2].c_str(), "Invalid communication size: %s");
- long receivers_count = xbt_str_parse_int(args[3].c_str(), "Invalid amount of receivers: %s");
-
- simgrid::s4u::CommPtr* comms = new simgrid::s4u::CommPtr[number_of_tasks + receivers_count] ;
-
- for (int i = 0; i < number_of_tasks; i++) {
- char mailbox[80];
- char taskname[80];
- snprintf(mailbox,79, "receiver-%ld", i % receivers_count);
- snprintf(taskname,79, "Task_%d", i);
- comms[i] = mbox->put_async((void*)mailbox, 42.0);
- XBT_INFO("Send to receiver-%ld Task_%d", i % receivers_count, i);
+ messages_count = std::stol(args[1]);
+ msg_size = std::stod(args[2]);
+ receivers_count = std::stol(args[3]);
+
+}
+void operator()()
+{
+ simgrid::s4u::CommPtr* comms = new simgrid::s4u::CommPtr[messages_count + receivers_count];
+
+ /* Start dispatching all messages to receivers, in a round robin fashion */
+ for (int i = 0; i < messages_count; i++) {
+
+ std::string mboxName = std::string("receiver-") + std::to_string(i % receivers_count);
+ simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::byName(mboxName);
+ std::string msgName = std::string("Message ") + std::to_string(i);
+ char* payload = xbt_strdup(msgName.c_str()); // copy the data we send: 'msgName' is not a stable storage location
+
+ XBT_INFO("Send '%s' to '%s'", msgName.c_str(), mboxName.c_str());
+ comms[i] = mbox->put_async((void*)payload, msg_size);
}
+ /* Start sending messages to let the workers know that they should stop */
for (int i = 0; i < receivers_count; i++) {
- char mailbox[80];
- snprintf(mailbox,79, "receiver-%ld", i % receivers_count);
+ std::string mbox_name = std::string("receiver-") + std::to_string(i % receivers_count);
+ simgrid::s4u::MailboxPtr mbox = simgrid::s4u::Mailbox::byName(mbox_name);
+ char* payload = xbt_strdup("finalize"); // Make a copy of the data we will send
- comms[i + number_of_tasks] = mbox->put_async((void*)mailbox, 42.0);
-
- XBT_INFO("Send to receiver-%ld finalize", i % receivers_count);
+ comms[i + messages_count] = mbox->put_async((void*)payload, 0);
+ XBT_INFO("Send 'finalize' to 'receiver-%ld'", i % receivers_count);
}
+ XBT_INFO("Done dispatching all messages");
- /* Here we are waiting for the completion of all communications */
- for (int i = 0; i < number_of_tasks + receivers_count; i++)
- comms[i]->wai();
+ /* Now that all message exchanges were initiated, this loop waits for the termination of them all */
+ for (int i = 0; i < messages_count + receivers_count; i++)
+ comms[i]->wait();
delete [] comms;
-}
-void operator()()
-{
XBT_INFO("Goodbye now!");
}
};
class receiver {
+ simgrid::s4u::MailboxPtr mbox;
+
public:
explicit receiver(std::vector<std::string> args)
{
- xbt_assert(args.size() == 1,"This function expects 1 parameter from the XML deployment file");
- int id = xbt_str_parse_int(args[0].c_str(), "Any process of this example must have a numerical name, not %s");
- void *received;
- char mailbox[80];
- snprintf(mailbox,79, "receiver-%d", id);
-
- simgrid::s4u::this_actor::sleep_for(10.0);
+ xbt_assert(args.size() == 2, "This function expects 2 parameters from the XML deployment file but got %zu",
+ args.size());
+ int id = xbt_str_parse_int(args[1].c_str(), "Any process of this example must have a numerical name, not %s");
+ std::string mbox_name = std::string("receiver-") + std::to_string(id);
+ mbox = simgrid::s4u::Mailbox::byName(mbox_name);
+}
+void operator()()
+{
+ XBT_INFO("Wait for my first message");
while (1) {
- XBT_INFO("Wait to receive a task");
- received = NULL;
- comm = mbox->get_async(&received);
- comm->wait();
- if (strcmp(MSG_task_get_name(task), "finalize") == 0) {
- MSG_task_destroy(task);
+ char* received = static_cast<char*>(mbox->get());
+ XBT_INFO("I got a '%s'.", received);
+ if (std::strcmp(received, "finalize") == 0) { /* If it's a finalize message, we're done */
+ xbt_free(received);
break;
}
-
- XBT_INFO("Processing \"%s\"", MSG_task_get_name(task));
- MSG_task_execute(task);
- XBT_INFO("\"%s\" done", MSG_task_get_name(task));
- MSG_task_destroy(task);
+ /* - Otherwise receiving the message was all we were supposed to do */
+ xbt_free(received);
}
- XBT_INFO("I'm done. See you!");
-}
-void operator()()
-{
- simgrid::s4u::Mailbox::byName("finalize")->put(nullptr, 1);
- XBT_INFO("I'm done. See you!");
}
};
int main(int argc, char *argv[])
{
- MSG_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::s4u::Engine* e = new simgrid::s4u::Engine(&argc, argv);
- MSG_create_environment(argv[1]);
- MSG_function_register("sender", sender);
- MSG_function_register("receiver", receiver);
- MSG_launch_application(argv[2]);
+ xbt_assert(argc > 2, "Usage: %s platform_file deployment_file\n", argv[0]);
- msg_error_t res = MSG_main();
+ e->registerFunction<sender>("sender");
+ e->registerFunction<receiver>("receiver");
- XBT_INFO("Simulation time %g", MSG_get_clock());
+ e->loadPlatform(argv[1]);
+ e->loadDeployment(argv[2]);
+ e->run();
- return res != MSG_OK;
+ return 0;
}
