/// <summary>
/// Enqueues a command to map a part of a buffer into the host address space.
/// </summary>
/// <param name="buffer"> The buffer to map. </param>
/// <param name="blocking"> The mode of operation of this call. </param>
/// <param name="flags"> A list of properties for the mapping mode. </param>
/// <param name="offset"> The <paramref name="buffer"/> element position where mapping starts. </param>
/// <param name="region"> The region of elements to map. </param>
/// <param name="events"> A collection of events that need to complete before this particular command can be executed. If <paramref name="events"/> is not <c>null</c> or read-only a new <see cref="OpenCLEvent"/> identifying this command is created and attached to the end of the collection. </param>
/// <remarks> If <paramref name="blocking"/> is <c>true</c> this method will not return until the command completes. If <paramref name="blocking"/> is <c>false</c> this method will return immediately after the command is enqueued. </remarks>
public IntPtr Map(OpenCLBufferBase buffer, bool blocking, OpenCLMemoryMappingFlags flags, long offset, long region, IReadOnlyList <OpenCLEventBase> events = null, IList <OpenCLEventBase> newEvents = null)
{
int sizeofT = Marshal.SizeOf(buffer.ElementType);
int eventWaitListSize;
CLEventHandle[] eventHandles = OpenCLTools.ExtractHandles(events, out eventWaitListSize);
CLEventHandle[] newEventHandle = (newEvents != null) ? new CLEventHandle[1] : null;
IntPtr mappedPtr = IntPtr.Zero;
OpenCLErrorCode error = OpenCLErrorCode.Success;
mappedPtr = CL10.EnqueueMapBuffer(Handle, buffer.Handle, blocking, flags, new IntPtr(offset * sizeofT), new IntPtr(region * sizeofT), eventWaitListSize, eventHandles, newEventHandle, out error);
OpenCLException.ThrowOnError(error);
if (newEvents != null)
{
lock (newEvents)
{
newEvents.Add(new OpenCLEvent(newEventHandle[0], this));
}
}
return(mappedPtr);
}
/// <summary>
/// Enqueues a command to map a part of a <see cref="OpenCLImage"/> into the host address space.
/// </summary>
/// <param name="image"> The <see cref="OpenCLImage"/> to map. </param>
/// <param name="blocking"> The mode of operation of this command. If <c>true</c> this call will not return until the command has finished execution. </param>
/// <param name="flags"> A list of properties for the mapping mode. </param>
/// <param name="offset"> The <paramref name="image"/> element position where mapping starts. </param>
/// <param name="region"> The region of elements to map. </param>
/// <param name="events"> A collection of events that need to complete before this particular command can be executed. If <paramref name="events"/> is not <c>null</c> or read-only a new <see cref="OpenCLEvent"/> identifying this command is created and attached to the end of the collection. </param>
/// <remarks> If <paramref name="blocking"/> is <c>true</c> this method will not return until the command completes. If <paramref name="blocking"/> is <c>false</c> this method will return immediately after the command is enqueued. </remarks>
public IntPtr Map(OpenCLImage image, bool blocking, OpenCLMemoryMappingFlags flags, SysIntX3 offset, SysIntX3 region, IReadOnlyList <OpenCLEventBase> events = null, IList <OpenCLEventBase> newEvents = null)
{
int eventWaitListSize;
CLEventHandle[] eventHandles = OpenCLTools.ExtractHandles(events, out eventWaitListSize);
CLEventHandle[] newEventHandle = (newEvents != null) ? new CLEventHandle[1] : null;
IntPtr mappedPtr, rowPitch, slicePitch;
OpenCLErrorCode error = OpenCLErrorCode.Success;
mappedPtr = CL10.EnqueueMapImage(Handle, image.Handle, blocking, flags, ref offset, ref region, out rowPitch, out slicePitch, eventWaitListSize, eventHandles, newEventHandle, out error);
OpenCLException.ThrowOnError(error);
if (newEvents != null)
{
lock (newEvents)
{
newEvents.Add(new OpenCLEvent(newEventHandle[0], this));
}
}
return(mappedPtr);
}
/// <summary>
/// Enqueues a command to copy a 2D or 3D region of elements between two buffers.
/// </summary>
/// <typeparam name="T"> The type of data in the buffers. </typeparam>
/// <param name="source"> The buffer to copy from. </param>
/// <param name="destination"> The buffer to copy to. </param>
/// <param name="sourceOffset"> The <paramref name="source"/> element position where reading starts. </param>
/// <param name="destinationOffset"> The <paramref name="destination"/> element position where writing starts. </param>
/// <param name="region"> The region of elements to copy. </param>
/// <param name="sourceRowPitch"> The size of the source buffer row in bytes. If set to zero then <paramref name="sourceRowPitch"/> equals <c>region.X * sizeof(T)</c>. </param>
/// <param name="sourceSlicePitch"> The size of the source buffer 2D slice in bytes. If set to zero then <paramref name="sourceSlicePitch"/> equals <c>region.Y * sizeof(T) * sourceRowPitch</c>. </param>
/// <param name="destinationRowPitch"> The size of the destination buffer row in bytes. If set to zero then <paramref name="destinationRowPitch"/> equals <c>region.X * sizeof(T)</c>. </param>
/// <param name="destinationSlicePitch"> The size of the destination buffer 2D slice in bytes. If set to zero then <paramref name="destinationSlicePitch"/> equals <c>region.Y * sizeof(T) * destinationRowPitch</c>. </param>
/// <param name="events"> A collection of events that need to complete before this particular command can be executed. If <paramref name="events"/> is not <c>null</c> or read-only a new <see cref="OpenCLEvent"/> identifying this command is created and attached to the end of the collection. </param>
/// <remarks> Requires OpenCL 1.1. </remarks>
public void Copy(OpenCLBufferBase source, OpenCLBufferBase destination, SysIntX3 sourceOffset, SysIntX3 destinationOffset, SysIntX3 region, long sourceRowPitch, long sourceSlicePitch, long destinationRowPitch, long destinationSlicePitch, IReadOnlyList <OpenCLEventBase> events = null, IList <OpenCLEventBase> newEvents = null)
{
int sizeofT = Marshal.SizeOf(source.ElementType);
sourceOffset.X = new IntPtr(sizeofT * sourceOffset.X.ToInt64());
destinationOffset.X = new IntPtr(sizeofT * destinationOffset.X.ToInt64());
region.X = new IntPtr(sizeofT * region.X.ToInt64());
int eventWaitListSize;
CLEventHandle[] eventHandles = OpenCLTools.ExtractHandles(events, out eventWaitListSize);
CLEventHandle[] newEventHandle = (newEvents != null) ? new CLEventHandle[1] : null;
OpenCLErrorCode error = CL11.EnqueueCopyBufferRect(this.Handle, source.Handle, destination.Handle, ref sourceOffset, ref destinationOffset, ref region, new IntPtr(sourceRowPitch), new IntPtr(sourceSlicePitch), new IntPtr(destinationRowPitch), new IntPtr(destinationSlicePitch), eventWaitListSize, eventHandles, newEventHandle);
OpenCLException.ThrowOnError(error);
if (newEvents != null)
{
lock (newEvents)
{
newEvents.Add(new OpenCLEvent(newEventHandle[0], this));
}
}
}
/// <summary>
/// Waits on the host thread for the specified events to complete.
/// </summary>
/// <param name="events"> The events to be waited for completition. </param>
public static void Wait(List <OpenCLEventBase> events)
{
int eventWaitListSize;
CLEventHandle[] eventHandles = OpenCLTools.ExtractHandles(events, out eventWaitListSize);
OpenCLErrorCode error = CL10.WaitForEvents(eventWaitListSize, eventHandles);
OpenCLException.ThrowOnError(error);
}
/// <summary>
/// Builds (compiles and links) a program executable from the program source or binary for all or some of the <see cref="OpenCLProgram.Devices"/>.
/// </summary>
/// <param name="devices"> A subset or all of <see cref="OpenCLProgram.Devices"/>. If <paramref name="devices"/> is <c>null</c>, the executable is built for every item of <see cref="OpenCLProgram.Devices"/> for which a source or a binary has been loaded. </param>
/// <param name="options"> A set of options for the OpenCL compiler. </param>
/// <param name="notify"> A delegate instance that represents a reference to a notification routine. This routine is a callback function that an application can register and which will be called when the program executable has been built (successfully or unsuccessfully). If <paramref name="notify"/> is not <c>null</c>, <see cref="OpenCLProgram.Build"/> does not need to wait for the build to complete and can return immediately. If <paramref name="notify"/> is <c>null</c>, <see cref="OpenCLProgram.Build"/> does not return until the build has completed. The callback function may be called asynchronously by the OpenCL implementation. It is the application's responsibility to ensure that the callback function is thread-safe and that the delegate instance doesn't get collected by the Garbage Collector until the build operation triggers the callback. </param>
/// <param name="notifyDataPtr"> Optional user data that will be passed to <paramref name="notify"/>. </param>
public void Build(IList <OpenCLDevice> devices, string options, OpenCLProgramBuildNotifier notify, IntPtr notifyDataPtr)
{
int handleCount;
CLDeviceHandle[] deviceHandles = OpenCLTools.ExtractHandles(devices, out handleCount);
buildOptions = (options != null) ? options : "";
buildNotify = notify;
OpenCLErrorCode error = CL10.BuildProgram(Handle, handleCount, deviceHandles, options, buildNotify, notifyDataPtr);
OpenCLException.ThrowOnError(error);
}
/// <summary>
/// Creates a new <see cref="OpenCLProgram"/> from a specified list of binaries.
/// </summary>
/// <param name="context"> A <see cref="OpenCLContext"/>. </param>
/// <param name="binaries"> A list of binaries, one for each item in <paramref name="devices"/>. </param>
/// <param name="devices"> A subset of the <see cref="OpenCLContext.Devices"/>. If <paramref name="devices"/> is <c>null</c>, OpenCL will associate every binary from <see cref="OpenCLProgram.Binaries"/> with a corresponding <see cref="OpenCLDevice"/> from <see cref="OpenCLContext.Devices"/>. </param>
public OpenCLProgram(OpenCLContext context, IList <byte[]> binaries, IList <OpenCLDevice> devices)
{
int count;
CLDeviceHandle[] deviceHandles = (devices != null) ?
OpenCLTools.ExtractHandles(devices, out count) :
OpenCLTools.ExtractHandles(context.Devices, out count);
IntPtr[] binariesPtrs = new IntPtr[count];
IntPtr[] binariesLengths = new IntPtr[count];
int[] binariesStats = new int[count];
OpenCLErrorCode error = OpenCLErrorCode.Success;
GCHandle[] binariesGCHandles = new GCHandle[count];
try
{
for (int i = 0; i < count; i++)
{
binariesGCHandles[i] = GCHandle.Alloc(binaries[i], GCHandleType.Pinned);
binariesPtrs[i] = binariesGCHandles[i].AddrOfPinnedObject();
binariesLengths[i] = new IntPtr(binaries[i].Length);
}
Handle = CL10.CreateProgramWithBinary(
context.Handle,
count,
deviceHandles,
binariesLengths,
binariesPtrs,
binariesStats,
out error);
OpenCLException.ThrowOnError(error);
}
finally
{
for (int i = 0; i < count; i++)
{
binariesGCHandles[i].Free();
}
}
this.binaries = new ReadOnlyCollection <byte[]>(binaries);
this.context = context;
this.devices = new ReadOnlyCollection <OpenCLDevice>(
(devices != null) ? devices : context.Devices);
//Trace.WriteLine("Create " + this + " in Thread(" + Thread.CurrentThread.ManagedThreadId + ").", "Information");
}
/// <summary>
/// Enqueues a command to read data from a <see cref="OpenCLImage"/>.
/// </summary>
/// <param name="source"> The <see cref="OpenCLImage"/> to read from. </param>
/// <param name="blocking"> The mode of operation of this command. If <c>true</c> this call will not return until the command has finished execution. </param>
/// <param name="offset"> The <paramref name="source"/> element position where reading starts. </param>
/// <param name="region"> The region of elements to read. </param>
/// <param name="rowPitch"> The <see cref="OpenCLImage.RowPitch"/> of <paramref name="source"/> or 0. </param>
/// <param name="slicePitch"> The <see cref="OpenCLImage.SlicePitch"/> of <paramref name="source"/> or 0. </param>
/// <param name="destination"> A pointer to a preallocated memory area to read the data into. </param>
/// <param name="events"> A collection of events that need to complete before this particular command can be executed. If <paramref name="events"/> is not <c>null</c> or read-only a new <see cref="OpenCLEvent"/> identifying this command is created and attached to the end of the collection. </param>
/// <remarks> If <paramref name="blocking"/> is <c>true</c> this method will not return until the command completes. If <paramref name="blocking"/> is <c>false</c> this method will return immediately after the command is enqueued. </remarks>
public void Read(OpenCLImage source, bool blocking, SysIntX3 offset, SysIntX3 region, long rowPitch, long slicePitch, IntPtr destination, IReadOnlyList <OpenCLEventBase> events = null, IList <OpenCLEventBase> newEvents = null)
{
int eventWaitListSize;
CLEventHandle[] eventHandles = OpenCLTools.ExtractHandles(events, out eventWaitListSize);
CLEventHandle[] newEventHandle = (newEvents != null) ? new CLEventHandle[1] : null;
OpenCLErrorCode error = CL10.EnqueueReadImage(Handle, source.Handle, blocking, ref offset, ref region, new IntPtr(rowPitch), new IntPtr(slicePitch), destination, eventWaitListSize, eventHandles, newEventHandle);
OpenCLException.ThrowOnError(error);
if (newEvents != null)
{
lock (newEvents)
{
newEvents.Add(new OpenCLEvent(newEventHandle[0], this));
}
}
}
/// <summary>
/// Enqueues a command to execute a single <see cref="OpenCLKernel"/>.
/// </summary>
/// <param name="kernel"> The <see cref="OpenCLKernel"/> to execute. </param>
/// <param name="events"> A collection of events that need to complete before this particular command can be executed. If <paramref name="events"/> is not <c>null</c> or read-only a new <see cref="OpenCLEvent"/> identifying this command is created and attached to the end of the collection. </param>
public void ExecuteTask(OpenCLKernel kernel, IReadOnlyList <OpenCLEventBase> events = null, IList <OpenCLEventBase> newEvents = null)
{
int eventWaitListSize;
CLEventHandle[] eventHandles = OpenCLTools.ExtractHandles(events, out eventWaitListSize);
CLEventHandle[] newEventHandle = (newEvents != null) ? new CLEventHandle[1] : null;
OpenCLErrorCode error = CL10.EnqueueTask(Handle, kernel.Handle, eventWaitListSize, eventHandles, newEventHandle);
OpenCLException.ThrowOnError(error);
if (newEvents != null)
{
lock (newEvents)
{
newEvents.Add(new OpenCLEvent(newEventHandle[0], this));
}
}
}
/// <summary>
/// Enqueues a command to write data to a buffer.
/// </summary>
/// <param name="destination"> The buffer to write to. </param>
/// <param name="blocking"> The mode of operation of this command. If <c>true</c> this call will not return until the command has finished execution. </param>
/// <param name="destinationOffset"> The <paramref name="destination"/> element position where writing starts. </param>
/// <param name="region"> The region of elements to write. </param>
/// <param name="source"> The data written to the buffer. </param>
/// <param name="events"> A collection of events that need to complete before this particular command can be executed. If <paramref name="events"/> is not <c>null</c> or read-only a new <see cref="OpenCLEvent"/> identifying this command is created and attached to the end of the collection. </param>
/// <remarks> If <paramref name="blocking"/> is <c>true</c> this method will not return until the command completes. If <paramref name="blocking"/> is <c>false</c> this method will return immediately after the command is enqueued. </remarks>
public void Write(OpenCLBufferBase destination, bool blocking, long destinationOffset, long region, IntPtr source, IReadOnlyList <OpenCLEventBase> events = null, IList <OpenCLEventBase> newEvents = null)
{
int sizeofT = Marshal.SizeOf(destination.ElementType);
int eventWaitListSize;
CLEventHandle[] eventHandles = OpenCLTools.ExtractHandles(events, out eventWaitListSize);
CLEventHandle[] newEventHandle = (newEvents != null) ? new CLEventHandle[1] : null;
OpenCLErrorCode error = CL10.EnqueueWriteBuffer(Handle, destination.Handle, blocking, new IntPtr(destinationOffset * sizeofT), new IntPtr(region * sizeofT), source, eventWaitListSize, eventHandles, newEventHandle);
OpenCLException.ThrowOnError(error);
if (newEvents != null)
{
lock (newEvents)
{
newEvents.Add(new OpenCLEvent(newEventHandle[0], this));
}
}
}
/// <summary>
/// Enqueues a command to unmap a buffer or a <see cref="OpenCLImage"/> from the host address space.
/// </summary>
/// <param name="memory"> The <see cref="OpenCLMemory"/>. </param>
/// <param name="mappedPtr"> The host address returned by a previous call to <see cref="OpenCLCommandQueue.Map"/>. This pointer is <c>IntPtr.Zero</c> after this method returns. </param>
/// <param name="events"> A collection of events that need to complete before this particular command can be executed. If <paramref name="events"/> is not <c>null</c> or read-only a new <see cref="OpenCLEvent"/> identifying this command is created and attached to the end of the collection. </param>
public void Unmap(OpenCLMemory memory, ref IntPtr mappedPtr, IReadOnlyList <OpenCLEventBase> events = null, IList <OpenCLEventBase> newEvents = null)
{
int eventWaitListSize;
CLEventHandle[] eventHandles = OpenCLTools.ExtractHandles(events, out eventWaitListSize);
CLEventHandle[] newEventHandle = (newEvents != null) ? new CLEventHandle[1] : null;
OpenCLErrorCode error = CL10.EnqueueUnmapMemObject(Handle, memory.Handle, mappedPtr, eventWaitListSize, eventHandles, newEventHandle);
OpenCLException.ThrowOnError(error);
mappedPtr = IntPtr.Zero;
if (newEvents != null)
{
lock (newEvents)
{
newEvents.Add(new OpenCLEvent(newEventHandle[0], this));
}
}
}
/// <summary>
/// Enqueues a command to execute a range of <see cref="OpenCLKernel"/>s in parallel.
/// </summary>
/// <param name="kernel"> The <see cref="OpenCLKernel"/> to execute. </param>
/// <param name="globalWorkOffset"> An array of values that describe the offset used to calculate the global ID of a work-item instead of having the global IDs always start at offset (0, 0,... 0). </param>
/// <param name="globalWorkSize"> An array of values that describe the number of global work-items in dimensions that will execute the kernel function. The total number of global work-items is computed as global_work_size[0] *...* global_work_size[work_dim - 1]. </param>
/// <param name="localWorkSize"> An array of values that describe the number of work-items that make up a work-group (also referred to as the size of the work-group) that will execute the <paramref name="kernel"/>. The total number of work-items in a work-group is computed as local_work_size[0] *... * local_work_size[work_dim - 1]. </param>
/// <param name="events"> A collection of events that need to complete before this particular command can be executed. If <paramref name="events"/> is not <c>null</c> or read-only a new <see cref="OpenCLEvent"/> identifying this command is created and attached to the end of the collection. </param>
public void Execute(OpenCLKernel kernel, long[] globalWorkOffset, long[] globalWorkSize, long[] localWorkSize, IReadOnlyList <OpenCLEventBase> events = null, IList <OpenCLEventBase> newEvents = null)
{
int eventWaitListSize;
CLEventHandle[] eventHandles = OpenCLTools.ExtractHandles(events, out eventWaitListSize);
CLEventHandle[] newEventHandle = (newEvents != null) ? new CLEventHandle[1] : null;
OpenCLErrorCode error = CL10.EnqueueNDRangeKernel(Handle, kernel.Handle, globalWorkSize.Length, OpenCLTools.ConvertArray(globalWorkOffset), OpenCLTools.ConvertArray(globalWorkSize), OpenCLTools.ConvertArray(localWorkSize), eventWaitListSize, eventHandles, newEventHandle);
OpenCLException.ThrowOnError(error);
if (newEvents != null)
{
lock (newEvents)
{
newEvents.Add(new OpenCLEvent(newEventHandle[0], this));
}
}
}
/// <summary>
/// Enqueues a command to copy data between <see cref="OpenCLImage"/>s.
/// </summary>
/// <param name="source"> The <see cref="OpenCLImage"/> to copy from. </param>
/// <param name="destination"> The <see cref="OpenCLImage"/> to copy to. </param>
/// <param name="sourceOffset"> The <paramref name="source"/> element position where reading starts. </param>
/// <param name="destinationOffset"> The <paramref name="destination"/> element position where writing starts. </param>
/// <param name="region"> The region of elements to copy. </param>
/// <param name="events"> A collection of events that need to complete before this particular command can be executed. If <paramref name="events"/> is not <c>null</c> or read-only a new <see cref="OpenCLEvent"/> identifying this command is created and attached to the end of the collection. </param>
public void Copy(OpenCLImage source, OpenCLImage destination, SysIntX3 sourceOffset, SysIntX3 destinationOffset, SysIntX3 region, IReadOnlyList <OpenCLEventBase> events = null, IList <OpenCLEventBase> newEvents = null)
{
int eventWaitListSize;
CLEventHandle[] eventHandles = OpenCLTools.ExtractHandles(events, out eventWaitListSize);
CLEventHandle[] newEventHandle = (newEvents != null) ? new CLEventHandle[1] : null;
OpenCLErrorCode error = CL10.EnqueueCopyImage(Handle, source.Handle, destination.Handle, ref sourceOffset, ref destinationOffset, ref region, eventWaitListSize, eventHandles, newEventHandle);
OpenCLException.ThrowOnError(error);
if (newEvents != null)
{
lock (newEvents)
{
newEvents.Add(new OpenCLEvent(newEventHandle[0], this));
}
}
}
/// <summary>
/// Enqueues a command to release <see cref="OpenCLMemory"/>s that have been created from OpenGL objects.
/// </summary>
/// <param name="memObjs"> A collection of <see cref="OpenCLMemory"/>s that correspond to OpenGL memory objects. </param>
/// <param name="events"> A collection of events that need to complete before this particular command can be executed. If <paramref name="events"/> is not <c>null</c> or read-only a new <see cref="OpenCLEvent"/> identifying this command is created and attached to the end of the collection. </param>
public void ReleaseGLObjects(IList <OpenCLMemory> memObjs, IReadOnlyList <OpenCLEventBase> events = null, IList <OpenCLEventBase> newEvents = null)
{
int memObjCount;
CLMemoryHandle[] memObjHandles = OpenCLTools.ExtractHandles(memObjs, out memObjCount);
int eventWaitListSize;
CLEventHandle[] eventHandles = OpenCLTools.ExtractHandles(events, out eventWaitListSize);
CLEventHandle[] newEventHandle = (newEvents != null) ? new CLEventHandle[1] : null;
OpenCLErrorCode error = CL10.EnqueueReleaseGLObjects(Handle, memObjCount, memObjHandles, eventWaitListSize, eventHandles, newEventHandle);
OpenCLException.ThrowOnError(error);
if (newEvents != null)
{
lock (newEvents)
{
newEvents.Add(new OpenCLEvent(newEventHandle[0], this));
}
}
}
/// <summary>
/// Creates a new <see cref="OpenCLContext"/> on a collection of <see cref="OpenCLDevice"/>s.
/// </summary>
/// <param name="devices"> A collection of <see cref="OpenCLDevice"/>s to associate with the <see cref="OpenCLContext"/>. </param>
/// <param name="properties"> A <see cref="OpenCLContextPropertyList"/> of the <see cref="OpenCLContext"/>. </param>
/// <param name="notify"> A delegate instance that refers to a notification routine. This routine is a callback function that will be used by the OpenCL implementation to report information on errors that occur in the <see cref="OpenCLContext"/>. The callback function may be called asynchronously by the OpenCL implementation. It is the application's responsibility to ensure that the callback function is thread-safe and that the delegate instance doesn't get collected by the Garbage Collector until <see cref="OpenCLContext"/> is disposed. If <paramref name="notify"/> is <c>null</c>, no callback function is registered. </param>
/// <param name="notifyDataPtr"> Optional user data that will be passed to <paramref name="notify"/>. </param>
public OpenCLContext(List <OpenCLDevice> devices, OpenCLContextPropertyList properties, OpenCLContextNotifier notify, IntPtr notifyDataPtr)
{
int handleCount;
CLDeviceHandle[] deviceHandles = OpenCLTools.ExtractHandles(devices, out handleCount);
IntPtr[] propertyArray = (properties != null) ? properties.ToIntPtrArray() : null;
callback = notify;
OpenCLErrorCode error = OpenCLErrorCode.Success;
Handle = CL10.CreateContext(propertyArray, handleCount, deviceHandles, notify, notifyDataPtr, out error);
OpenCLException.ThrowOnError(error);
SetID(Handle.Value);
this.properties = properties;
OpenCLContextProperty platformProperty = properties.GetByName(OpenCLContextProperties.Platform);
this.platform = OpenCLPlatform.GetByHandle(platformProperty.Value);
this.devices = GetDevices();
//Trace.WriteLine("Create " + this + " in Thread(" + Thread.CurrentThread.ManagedThreadId + ").", "Information");
}