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git-svn-id: svn://ultimatepp.org/upp/trunk@3132 f0d560ea-af0d-0410-9eb7-867de7ffcac7
This commit is contained in:
cxl 2011-01-31 11:07:14 +00:00
parent c0c1ebf3bb
commit 7e756cea5f
7 changed files with 129 additions and 1 deletions
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uppdev/OpenCL/main.cpp Normal file
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#include <utility>
#define __NO_STD_VECTOR // Use cl::vector instead of STL version
#include <CL/cl.hpp>
#include <cstdio>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <string>
#include <iterator>
const std::string hw("Hello World\n");
inline void checkErr(cl_int err, const char * name){
if (err != CL_SUCCESS) {
std::cerr << "ERROR: " << name<< " (" << err << ")" << std::endl;
exit(EXIT_FAILURE);
}
}
int main(void)
{
cl_int err;
cl::vector< cl::Platform > platformList;
cl::Platform::get(&platformList);
checkErr(platformList.size()!=0 ? CL_SUCCESS : -1, "cl::Platform::get");
std::cerr << "Platform number is: " << platformList.size() << std::endl;
std::string platformVendor;
platformList[0].getInfo((cl_platform_info)CL_PLATFORM_VENDOR, &platformVendor);
std::cerr << "Platform is by: " << platformVendor << "\n";
cl_context_properties cprops[3] =
{CL_CONTEXT_PLATFORM, (cl_context_properties)(platformList[0])(), 0};
cl::Context context(
CL_DEVICE_TYPE_GPU,
cprops,
NULL,
NULL,
&err);
checkErr(err, "Conext::Context()");
char * outH = new char[hw.length()+1];
cl::Buffer outCL(
context,
CL_MEM_WRITE_ONLY | CL_MEM_USE_HOST_PTR,
hw.length()+1,
outH,
&err);
checkErr(err, "Buffer::Buffer()");
cl::vector<cl::Device> devices;
devices = context.getInfo<CL_CONTEXT_DEVICES>();
checkErr( devices.size() > 0 ? CL_SUCCESS : -1, "devices.size() > 0");
std::ifstream file("C:/MyApps/OpenCL/example1_kernels.cl");
checkErr(file.is_open() ? CL_SUCCESS:-1, "example1_kernel.cl");
std::string prog(std::istreambuf_iterator<char>(file),(std::istreambuf_iterator<char>()));
cl::Program::Sources source(1,std::make_pair(prog.c_str(), prog.length()+1));
cl::Program program(context, source);
err = program.build(devices,"");
checkErr(file.is_open() ? CL_SUCCESS : -1, "Program::build()");
cl::Kernel kernel(program, "hello", &err);
checkErr(err, "Kernel::Kernel()");
err = kernel.setArg(0, outCL);
checkErr(err, "Kernel::setArg()");
cl::CommandQueue queue(context, devices[0], 0, &err);
checkErr(err, "CommandQueue::CommandQueue()");
cl::Event event;
err = queue.enqueueNDRangeKernel(kernel,cl::NullRange,cl::NDRange(hw.length()+1),cl::NDRange(1, 1),NULL,&event);
checkErr(err, "ComamndQueue::enqueueNDRangeKernel()");
event.wait();
err = queue.enqueueReadBuffer(outCL,CL_TRUE,0,hw.length()+1,outH);
checkErr(err, "ComamndQueue::enqueueReadBuffer()");
std::cout << outH;
delete [] outH;
return EXIT_SUCCESS;
}