Radeon Pro Solid State Graphics, Руководство пользователя API

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Rev. 1.01
10
5 AMD Code Sample for OpenCL
// Create file.
cl_int clStatus = CL_SUCCESS ;
cl_file_amd clSsgFile = clCreateSsgFileObjectAMD (m_clContext,
CL_FILE_READ_ONLY_AMD, FILE_NAME, &clStatus);
if (clStatus != CL_SUCCESS ) {
s td::cout << "Error: Unable to create file handle." << std::endl;
return ;
}
// Get the file-size information.
size_t retSize = 0;
LARGE_INTEGER SsgFileSize;
clStatus = clGetSsgFileObjectInfoAMD (clSsgFile, CL_FILE_SIZE_AMD ,
sizeof (SsgFileSize), &SsgFileSize, &retSize);
if (clStatus != CL_SUCCESS ) {
s td::cout << "Error: Unable to retrieve file size." << std::endl;
return ;
}
if (retSize != sizeof (SsgFileSize)) {
s td::cout << "Error: Invalid file size info returned." << std::endl;
return ;
}
// Get the sector-size information.
// Allocated buffer must align with the sector size for best performance.
cl_uint sectorSize = 0;
clStatus = clGetSsgFileObjectInfoAMD (clSsgFile, CL_FILE_BLOCK_SIZE_AMD ,
sizeof (sectorSize), &sectorSize, &retSize);
if (clStatus != CL_SUCCESS ) {
s td::cout << "Error: Unable to retrieve file size." << std::endl;
return ;
}
if (retSize != sizeof (sectorSize)) {
s td::cout << "Error: Invalid sector size info returned." << std::endl;
return ;
}
// Create buffer.
cl_mem clBuffer = clCreateBuffer (m_clContext, CL_MEM_ USE_PERSISTENT_MEM_AMD,
DATA_SIZE_IN_BYTES, nullptr , &clStatus);
if (clStatus != CL_SUCCESS ) {
s td::cout << "Error: Unable to create buffer." << std::endl;
return ;
}
// Read information from the file; BUFF_OFFSET, SIZE_TO_READ and FILE_OFFSET must
// align with the sector size.
clStatus = clEnqueueReadSsgFileAMD (m_clCommandQueue, clBuffer, CL_TRUE , BUFF_OFFSET,
SIZE_TO_READ, clSsgFile, FILE_OFFSET, 0, NULL, NULL);
if (clStatus != CL_SUCCESS ) {
s td::cout << "Error: Data transfer failed." << std::endl;
}
// Release the file when you’re done with it.
clStatus = clReleaseSsgFileObjectAMD( clSsgFile);
if (clStatus != CL_SUCCESS ) {
s td::cout << "Warning: Unable to release file." << std::endl;
}
// Release the buffer when you’re done with it.
clStatus = clReleaseBuffer( clBuffer);
if (clStatus != CL_SUCCESS ) {
s td::cout << "Warning: Unable to release buffer." << std::endl;
}