Mycorrhiza/test/mycoagent.c

/*  
 * mycoagent.c
 *
 * This is an example agent that showcases the use of mycorrhiza.
 */

#include "../src/myco-agent.c"

// MYCO fetch:          Requests a remote, transactional resource. Blocks until
//                      the resource has been granted.
// MYCO create:         Creates a new resource and registers it with the agent.
// MYCO release:        Releases a resource. It can now be taken by other agents via fetch.
// MYCO free:           Destroys a resource for the entire system. Only works if the calling agent has ownership (fetch/create) of the resource.
// MYCO read:           Creates a local copy of a remote resource.
// MYCO push:           Updates the remote resource with the local copy obtained from read.
// MYCO lock:           Protects a resource from read access.
// MYCO unlock:         Allows read access again.

int main() {
    // At the beginning every agent needs to register itself with the agent server.
    char *agent_name = "DOMAIN1_MYAGENT";
    int agent_message_queue_id = myco_agent_register(agent_name);

    // MYCO create
    // #MYCO create("RESOURCE_1", 1024, transactional)
    char *resource_name = "RESOURCE_1";
    int resource_size = 1024;
    void *resource_pointer = myco_agent_register_resource(agent_message_queue_id, agent_name, resource_name, RESOURCE_TRANSACTIONAL, getpid(), resource_size);

    // MYCO lock
    myco_agent_lock_resource(agent_message_queue_id, agent_name, resource_name);

    // MYCO unlock
    myco_agent_unlock_resource(agent_message_queue_id, agent_name, resource_name);

    // MYCO release
    myco_agent_release_resource(agent_message_queue_id, agent_name, resource_name, resource_pointer, resource_size);

    // View available resources
    myco_agent_request_resource_list(agent_message_queue_id);

    // MYCO fetch
    // #MYCO fetch("RESOURCE_2")
    struct resource myresource2;
    myresource2 = myco_agent_request_resource(agent_message_queue_id, agent_name, "RESOURCE_2");
    if (myresource2.size != -1) {
        printf("The first integer of RESOURCE_2 is: %d\n", *((int*)myresource2.pointer));
    }

    // MYCO read
    // #MYCO read("RESOURCE_3")
    struct resource myresource3;
    myresource3 = myco_agent_read_remote_resource(agent_message_queue_id, "RESOURCE_3");
    if (myresource3.size != -1) {
        printf("The first integer of RESOURCE_3 is: %d\n", *((int*)myresource3.pointer));
    }

    // Change some values in RESOURCE_3
    if (myresource3.size != -1) {
        ((int*)myresource3.pointer)[0] = 0;
    }

    // MYCO push
    // #MYCO push("RESOURCE_3")
    myco_agent_write_remote_resource(agent_message_queue_id, "RESOURCE_3", myresource3.pointer, myresource3.size, 0);


    // MYCO free
    // #MYCO free("RESOURCE_1")
    myco_agent_unregister_resource(agent_message_queue_id, resource_name);

    // MYCO free
    // #MYCO free("RESOURCE_2")
    myco_agent_unregister_resource(agent_message_queue_id, "RESOURCE_2");

    // At the end of its runtime the agent unregisters with the daemon.
    myco_agent_unregister(agent_name, agent_message_queue_id);

    return EXIT_SUCCESS;
}