odp_hello.c

This is a minimal application which demonstrates the startup and shutdown steps of an ODP application. It can be also used to debug API related build problems, etc. It does not use helpers to minimize dependency to anything else than the ODP API header file.

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright (c) 2016-2018 Linaro Limited
 */
 
#include <stdio.h>
#include <string.h>
 
#include <odp_api.h>
 
typedef struct {
    int num;
} options_t;
 
static int parse_args(int argc, char *argv[], options_t *opt)
{
    static const char * const args[] = {"-n"};
    int i, tmp;
 
    for (i = 1; i < argc; i++) {
        if ((strcmp(argv[i], args[0]) == 0) && argv[i + 1] &&
            (sscanf(argv[i + 1], "%i", &tmp) == 1)) {
            opt->num = tmp;
            i++;
        } else {
            printf("\nUsage:\n"
                   "  [%s  Number of iterations]\n\n",
                   args[0]);
            return -1;
        }
    }
 
    return 0;
}
 
int main(int argc, char *argv[])
{
    odp_instance_t inst;
    options_t opt;
    int i;
 
    memset(&opt, 0, sizeof(opt));
    opt.num = 1;
 
    if (parse_args(argc, argv, &opt))
        return -1;
 
    if (odp_init_global(&inst, NULL, NULL)) {
        printf("Global init failed.\n");
        return -1;
    }
 
    if (odp_init_local(inst, ODP_THREAD_CONTROL)) {
        printf("Local init failed.\n");
        return -1;
    }
 
    for (i = 0; i < opt.num; i++) {
        printf("Hello world from CPU %i!\n", odp_cpu_id());
        odp_time_wait_ns(ODP_TIME_SEC_IN_NS);
    }
 
    if (odp_term_local()) {
        printf("Local term failed.\n");
        return -1;
    }
 
    if (odp_term_global(inst)) {
        printf("Global term failed.\n");
        return -1;
    }
 
    return 0;
}