Example Client Program

Here is a simple synchronous client for the protocol defined in The example.mx File. Note that this client does not use advanced features such as asynchronous operation.

/* Example miniRPC client program */

#include <stdio.h>
#include <minirpc/minirpc.h>
#include "example_client.h"

#define die(s, args...) do {fprintf(stderr, s"\n", ##args); abort();} while (0)

int main(int argc, char **argv)
{
        char *host;
        char *port;
        struct mrpc_conn_set *set;
        struct mrpc_connection *conn;
        example_color_choice choice;
        example_count *count;
        int ret;

        if (argc != 3) {
                fprintf(stderr, "Usage: %s host port\n", argv[0]);
                exit(1);
        }
        host=argv[1];
        port=argv[2];

        if (mrpc_conn_set_create(&set, example_client, NULL))
                die("Couldn't create connection set");
        if (mrpc_start_dispatch_thread(set))
                die("Couldn't start dispatch thread");
        if (mrpc_conn_create(&conn, set, NULL))
                die("Couldn't create connection handle");
        ret=mrpc_connect(conn, AF_UNSPEC, host, port);
        if (ret)
                die("Couldn't connect to %s:%s: %s", host, port, strerror(ret));

        if (example_get_num_colors(conn, &count))
                die("get_num_colors failed");
        printf("Initial num_colors: %d\n", *count);
        free_example_count(count, 1);

        choice.acceptable.acceptable_val=malloc(4 * sizeof(example_color));
        choice.acceptable.acceptable_len=4;
        choice.acceptable.acceptable_val[0]=RED;
        choice.acceptable.acceptable_val[1]=ORANGE;
        choice.acceptable.acceptable_val[2]=GREEN;
        choice.acceptable.acceptable_val[3]=BLUE;
        choice.preferred=BLUE;
        if (example_choose_color(conn, &choice))
                die("choose_color failed");
        free_example_color_choice(&choice, 0);

        if (example_get_num_colors(conn, &count))
                die("get_num_colors failed");
        printf("Final num_colors: %d\n", *count);
        free_example_count(count, 1);

        mrpc_conn_close(conn);
        mrpc_conn_unref(conn);
        mrpc_conn_set_unref(set);
        return 0;
}