Attachment 127602 Details for Bug 98490 – Minimal example to reproduce

Minimal example to reproduce

subbug.c (text/x-c), 2.12 KB, created by Kai on 2016-10-29 10:53:48 UTC

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Creator: Kai

Created: 2016-10-29 10:53:48 UTC

Size: 2.12 KB

patch

obsolete

>#include <CL/cl.h>
>#include <stdio.h>
>#include <assert.h>
>
>#define NELEMS(x) (sizeof(x) / sizeof(*x))
>
>#define PLATFORM 0
>#define DEVICE 0
>
>int main(void) {
>    cl_int err = -1;
>
>    cl_uint num_platforms;
>    clGetPlatformIDs(0, NULL, &num_platforms);
>    assert(num_platforms >= 1);
>
>    cl_platform_id  * platforms = malloc(sizeof(*platforms) * num_platforms);
>    clGetPlatformIDs(num_platforms, platforms, NULL);
>
>    cl_uint num_devices;
>    clGetDeviceIDs(platforms[PLATFORM], CL_DEVICE_TYPE_ALL, 0, NULL, &num_devices);
>    assert(num_devices >= 1);
>
>    cl_device_id * devices = malloc(sizeof(*devices) * num_devices);
>    clGetDeviceIDs(platforms[PLATFORM], CL_DEVICE_TYPE_ALL, num_devices, devices, NULL);
>
>    cl_context_properties context_properties[] = {
>        CL_CONTEXT_PLATFORM, (cl_context_properties) platforms[PLATFORM], 0
>    };
>
>    cl_context context = clCreateContext(context_properties, 1, &devices[DEVICE], NULL, NULL, &err);
>    assert(err == CL_SUCCESS);
>
>#pragma GCC diagnostic push
>#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
>    cl_command_queue queue = clCreateCommandQueue(context, devices[DEVICE], 0, &err);
>#pragma GCC diagnostic pop
>    assert(err == CL_SUCCESS);
>
>    size_t buffer_size = 2048;
>    cl_mem buffer = clCreateBuffer(context, CL_MEM_ALLOC_HOST_PTR | CL_MEM_READ_WRITE,
>                                 buffer_size, NULL, &err);
>
>    cl_buffer_region region = {
>        .origin = 0,
>        .size = buffer_size / 2,
>    };
>    cl_mem sub_buffer = clCreateSubBuffer(buffer, 0, CL_BUFFER_CREATE_TYPE_REGION, &region, &err);;
>    assert(err == CL_SUCCESS);
>
>    void * data = clEnqueueMapBuffer(queue, sub_buffer, CL_TRUE, CL_MAP_READ | CL_MAP_WRITE, 0, buffer_size/2, 0, NULL, NULL, &err);
>    // Also doesn't work
>    //char data[1024];
>    //err = clEnqueueReadBuffer(queue, sub_buffer, CL_TRUE, 0, buffer_size/2, data, 0, NULL, NULL);
>    if (err != CL_SUCCESS) {
>        printf("%i\n", err);
>        return 1;
>    }
>
>    clReleaseMemObject(sub_buffer);
>    clReleaseMemObject(buffer);
>    clReleaseCommandQueue(queue);
>    clReleaseContext(context);
>
>    free(devices);
>    free(platforms);
>
>    return 0;
>}

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