/// <summary>
/// Initialize specified OpenCL device
/// </summary>
/// <param name="device">Device</param>
private static void InitializeDevice(OpenCLDevice device)
{
if (device.Context != null)
{
return;
}
Context context = null;
CommandQueue commandQueue = null;
try {
context = Context.Create(device.InnerDevice);
#if ENABLE_PROFILING
commandQueue = context.CreateCommandQueue(device.InnerDevice, CommandQueueProperties.ProfilingEnable);
#else
commandQueue = context.CreateCommandQueue(device.InnerDevice, 0);
#endif
} catch (Exception ex) {
if (commandQueue != null)
{
commandQueue.Dispose();
}
if (context != null)
{
context.Dispose();
}
throw new OpenCLException("Device is not available (" + ex.Message + ").", ex);
}
device.Context = context;
device.CommandQueue = commandQueue;
}
/// <summary>
/// Compiles specified OpenCL program on specified device
/// </summary>
/// <param name="device">OpenCL device</param>
/// <param name="programName">Program name</param>
/// <param name="programReceiveCallback">Callback to receive program sources; or null to use default storage</param>
/// <returns>Kernel set for program</returns>
public OpenCLKernelSet Compile(OpenCLDevice device, string programName, Func <string, string> programReceiveCallback = null)
{
const string buildOptions = "-cl-fast-relaxed-math -cl-mad-enable -cl-no-signed-zeros";
InitializeDevice(device);
OpenCLKernelSet kernelSet;
if (device.CachedKernels == null)
{
device.CachedKernels = new Dictionary <string, OpenCLKernelSet>();
}
else
{
if (device.CachedKernels.TryGetValue(programName, out kernelSet))
{
return(kernelSet);
}
}
string programSource;
if (programReceiveCallback != null)
{
programSource = programReceiveCallback(programName);
}
else
{
programSource = LoadSourceFromResources(programName);
}
Program program = device.Context.CreateProgramWithSource(programSource);
program.Build(UseRelaxedMath ? buildOptions : null);
#if ENABLE_PROFILING
Console.WriteLine("Using kernel {0}...", programName);
Console.WriteLine("OpenCL Build log: " + program.GetBuildLog(device.InnerDevice));
#endif
kernelSet = new OpenCLKernelSet {
Program = program,
Kernels = new Dictionary <string, NOpenCL.Kernel>(),
OwnerDevice = device
};
device.CachedKernels[programName] = kernelSet;
return(kernelSet);
}
/// <summary>
/// Creates buffer on target device from memory
/// </summary>
/// <param name="device">Target device</param>
/// <param name="ptr">Pointer to memory</param>
/// <param name="size">Size of memory</param>
/// <param name="readOnly">Bind as read-only</param>
/// <returns>Buffer</returns>
public unsafe OpenCLBuffer CreateBuffer(OpenCLDevice device, void *ptr, int size, bool readOnly)
{
try {
NOpenCL.Buffer buffer = device.Context.CreateBuffer(
MemoryFlags.UseHostPointer | (readOnly ? MemoryFlags.ReadOnly : MemoryFlags.ReadWrite),
size,
new IntPtr(ptr));
return(new OpenCLBuffer {
Ptr = new IntPtr(ptr),
Buffer = buffer,
OwnerDevice = device,
HasOwnership = true
});
} catch (Exception ex) {
throw new OpenCLException("Cannot create buffer. Buffer size is probably too high.", ex);
}
}