show OpenCL device list

cl_platform.c

#include <stdio.h>
#include <CL/cl.h>


#define MAX_PLATFORM_SIZE 256
#define MAX_DEVICE_SIZE 256

int main()
{
        cl_device_id devices[256];
        cl_platform_id platforms[256];
        cl_uint numDevices;
        cl_uint numPlatforms;
        cl_uint ret;
        cl_uint i, j;
        char buf[4096];


        ret = clGetPlatformIDs(MAX_PLATFORM_SIZE, platforms, &numPlatforms);
        if (ret != CL_SUCCESS) {
                exit(-1);
        }

        for (i=0; i<numPlatforms; i++) {

                ret = clGetPlatformInfo(platforms[i], CL_PLATFORM_NAME, sizeof(buf), buf, NULL);
                if (ret != CL_SUCCESS) {
                        exit(-1);
                }

                printf("Platform[%d] : %s\n\n", i, buf);

                ret = clGetDeviceIDs(platforms[i], CL_DEVICE_TYPE_ALL, MAX_DEVICE_SIZE, devices, &numDevices);
                if (ret != CL_SUCCESS) {
                        exit(-1);
                }

                for (j=0; j<numDevices; j++) {
                        printf("--- Device[%d] ---\n", j);
                        ret = clGetDeviceInfo(devices[j], CL_DEVICE_NAME, sizeof(buf), buf, NULL);
                        if (ret != CL_SUCCESS) {
                                exit(-1);
                        }
                        printf("Device Name : %s\n", buf);

                        ret = clGetDeviceInfo(devices[j], CL_DEVICE_VENDOR, sizeof(buf), buf, NULL);
                        if (ret != CL_SUCCESS) {
                                exit(-1);
                        }
                        printf("Device Vendor : %s\n", buf);

                        printf("------\n");

                }
                printf("\n");

        }

        return 0;
}