list_devices.c

/*
 * This file is part of cf4ocl (C Framework for OpenCL).
 *
 * cf4ocl is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * cf4ocl is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with cf4ocl.  If not, see <http://www.gnu.org/licenses/>.
 * */

/*
 * Description
 * -----------
 *
 * Example which demonstrates getting all platforms and devices in the system,
 * listing them and showing some info about them.
 *
 * */

#include <stdlib.h>
#include <stdio.h>
#include <assert.h>
#include <cf4ocl2.h>

/* Error handling macros. */
#define ERROR_MSG_AND_EXIT(msg) \
    do { fprintf(stderr, "\n%s\n", msg); exit(EXIT_FAILURE); } while(0)

#define HANDLE_ERROR(err) \
    if (err != NULL) { ERROR_MSG_AND_EXIT(err->message); }

int main() {

    /* cf4ocl objects. */
    CCLPlatforms* platf_list;
    CCLPlatform* platf;
    CCLDevice* dev;

    /* Other variables. */
    cl_uint num_platfs;
    cl_uint num_devs;
    char* info;

    /* Error handling object. */
    CCLErr* err = NULL;

    /* Get all platforms in system. */
    platf_list = ccl_platforms_new(&err);
    HANDLE_ERROR(err);

    /* Get number of platforms in system. */
    num_platfs = ccl_platforms_count(platf_list);

    /* Cycle through platforms. */
    for (cl_uint i = 0; i < num_platfs; ++i) {

        /* Get current platform. */
        platf = ccl_platforms_get(platf_list, i);

        /* Get platform name. */
        info = ccl_platform_get_info_string(
            platf, CL_PLATFORM_NAME, &err);
        HANDLE_ERROR(err);

        /* Print platform name. */
        printf("Platform #%d: %s\n", i, info);

        /* Get number of devices in current platform. */
        num_devs = ccl_platform_get_num_devices(platf, &err);
        HANDLE_ERROR(err);

        /* Cycle through devices. */
        for (cl_uint j = 0; j < num_devs; ++j) {

            /* Get current device. */
            dev = ccl_platform_get_device(platf, j, &err);
            HANDLE_ERROR(err);

            /* Get device name. */
            info = ccl_device_get_info_array(
                dev, CL_DEVICE_NAME, char*, &err);
            HANDLE_ERROR(err);

            /* Print device name. */
            printf("\tDevice #%d: %s\n", j, info);

        } /* Cycle devices. */

    } /* Cycle platforms. */

    /* Release platform set, which will release the underlying
     * platform wrappers, device wrappers and the requested info. */
    ccl_platforms_destroy(platf_list);

    /* Check all wrappers have been destroyed. */
    assert(ccl_wrapper_memcheck());

    /* Bye. */
    return EXIT_SUCCESS;

}