#include "opencl.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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cl_info cl = {0};
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void check_error(cl_info info)
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{
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if (info.error != CL_SUCCESS) {
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printf("\n Error number %d", info.error);
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}
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}
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#define MAX_DEVICES 10
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cl_info cl_init()
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{
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cl_info info;
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info.initialized = 0;
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cl_uint num_platforms, num_devices;
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// Fetch the Platform and Device IDs; we only want one.
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cl_device_id devices[MAX_DEVICES];
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info.error=clGetPlatformIDs(1, &info.platform, &num_platforms);
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check_error(info);
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info.error=clGetDeviceIDs(info.platform, CL_DEVICE_TYPE_ALL, MAX_DEVICES, devices, &num_devices);
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if(num_devices > MAX_DEVICES) num_devices = MAX_DEVICES;
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int index = getpid()%num_devices;
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printf("%d rand, %d devices, %d index\n", getpid(), num_devices, index);
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info.device = devices[index];
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fprintf(stderr, "Found %d device(s)\n", num_devices);
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check_error(info);
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cl_context_properties properties[]={
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CL_CONTEXT_PLATFORM, (cl_context_properties)info.platform,
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0};
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// Note that nVidia's OpenCL requires the platform property
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info.context=clCreateContext(properties, 1, &info.device, 0, 0, &info.error);
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check_error(info);
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info.queue = clCreateCommandQueue(info.context, info.device, 0, &info.error);
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check_error(info);
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info.initialized = 1;
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return info;
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}
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cl_program cl_fprog(char *filename, char *options, cl_info info)
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{
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size_t srcsize;
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char src[8192];
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memset(src, 0, 8192);
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FILE *fil=fopen(filename,"r");
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srcsize=fread(src, sizeof src, 1, fil);
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fclose(fil);
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const char *srcptr[]={src};
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// Submit the source code of the example kernel to OpenCL
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cl_program prog=clCreateProgramWithSource(info.context,1, srcptr, &srcsize, &info.error);
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check_error(info);
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char build_c[4096];
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// and compile it (after this we could extract the compiled version)
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info.error=clBuildProgram(prog, 0, 0, options, 0, 0);
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if ( info.error != CL_SUCCESS ) {
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fprintf(stderr, "Error Building Program: %d\n", info.error);
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clGetProgramBuildInfo( prog, info.device, CL_PROGRAM_BUILD_LOG, 4096, build_c, 0);
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fprintf(stderr, "Build Log for %s program:\n%s\n", filename, build_c);
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}
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return prog;
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}
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void cl_setup()
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{
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if(!cl.initialized){
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cl = cl_init();
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}
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}
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cl_kernel get_kernel(char *filename, char *kernelname, char *options)
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{
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cl_setup();
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cl_program prog = cl_fprog(filename, options, cl);
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cl_kernel kernel=clCreateKernel(prog, kernelname, &cl.error);
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check_error(cl);
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return kernel;
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}
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