internal Platform(CLPlatformID openclPlatform)
{
this.CLPlatformID = openclPlatform;
this.Name = GetPlatformInfo(this, CLPlatformInfo.Name);
this.Vendor = GetPlatformInfo(this, CLPlatformInfo.Vendor);
this.Profile = GetPlatformInfo(this, CLPlatformInfo.Profile);
this.Version = GetPlatformInfo(this, CLPlatformInfo.Version);
this.Extensions = GetPlatformInfo(this, CLPlatformInfo.Extensions);
}
public static Context ShareWithCGL(IntPtr cglShareGroup)
{
IntPtr[] properties =
{
new IntPtr(0x10000000), // CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE
cglShareGroup,
new IntPtr(0)
};
CLError error = CLError.None;
// TODO: Add parameter pfn_notify (logging function)
CLContext openclContext = OpenCLDriver.clCreateContext(properties, 0, null, null, IntPtr.Zero, ref error);
OpenCLError.Validate(error);
SizeT devicesSize = SizeT.Zero;
OpenCLError.Validate(OpenCLDriver.clGetContextInfo(openclContext, CLContextInfo.Devices, SizeT.Zero, IntPtr.Zero, ref devicesSize));
CLDeviceID[] devices = new CLDeviceID[((Int64)(devicesSize)) / IntPtr.Size];
GCHandle devicesHandle = GCHandle.Alloc(devices, GCHandleType.Pinned);
try
{
OpenCLError.Validate(OpenCLDriver.clGetContextInfo(openclContext, CLContextInfo.Devices, devicesSize, devicesHandle.AddrOfPinnedObject(), ref devicesSize));
Dictionary<CLPlatformID, CLPlatformID> platformsDictionary = new Dictionary<CLPlatformID, CLPlatformID>();
CLPlatformID[] platforms = null;
foreach (CLDeviceID device in devices)
{
SizeT platformsSize = SizeT.Zero;
OpenCLError.Validate(OpenCLDriver.clGetDeviceInfo(device, CLDeviceInfo.Platform, SizeT.Zero, platforms, ref platformsSize));
platforms = new CLPlatformID[((Int64)(platformsSize)) / IntPtr.Size];
OpenCLError.Validate(OpenCLDriver.clGetDeviceInfo(device, CLDeviceInfo.Platform, platformsSize, platforms, ref platformsSize));
foreach (CLPlatformID platform in platforms)
{
if (!platformsDictionary.ContainsKey(platform))
{
platformsDictionary.Add(platform, platform);
}
}
}
platforms = new CLPlatformID[platformsDictionary.Count];
Int32 index = 0;
foreach (var platform in platformsDictionary.Keys)
{
platforms[index++] = platform;
}
return new Context(openclContext, new Platforms(platforms), new Devices(devices));
}
finally
{
devicesHandle.Free();
}
}
internal static extern CLError clGetPlatformInfo(CLPlatformID platform, CLPlatformInfo param_name, SizeT param_value_size, IntPtr param_value, ref SizeT param_value_size_ret);
internal static extern CLError clGetDeviceIDs(CLPlatformID platform_id, CLDeviceType device_type, int num_entries, IntPtr devices, ref int num_devices);
internal static extern CLError clGetPlatformInfo(CLPlatformID platform, CLPlatformInfo param_name, SizeT param_value_size, IntPtr param_value, ref SizeT param_value_size_ret);
internal static extern CLError clGetDeviceIDs(CLPlatformID platform_id, CLDeviceType device_type, int num_entries, IntPtr devices, ref int num_devices);
public static Context Share(IntPtr openclContext)
{
SizeT devicesSize = SizeT.Zero;
CLContext clContext = new CLContext { Value = openclContext };
OpenCLError.Validate(OpenCLDriver.clGetContextInfo(clContext, CLContextInfo.Devices, SizeT.Zero, IntPtr.Zero, ref devicesSize));
CLDeviceID[] devices = new CLDeviceID[((Int64)(devicesSize)) / IntPtr.Size];
GCHandle devicesHandle = GCHandle.Alloc(devices, GCHandleType.Pinned);
try
{
OpenCLError.Validate(OpenCLDriver.clGetContextInfo(clContext, CLContextInfo.Devices, devicesSize, devicesHandle.AddrOfPinnedObject(), ref devicesSize));
Dictionary<CLPlatformID, CLPlatformID> platformsDictionary = new Dictionary<CLPlatformID, CLPlatformID>();
CLPlatformID[] platforms = null;
foreach (CLDeviceID device in devices)
{
SizeT platformsSize = SizeT.Zero;
OpenCLError.Validate(OpenCLDriver.clGetDeviceInfo(device, CLDeviceInfo.Platform, SizeT.Zero, platforms, ref platformsSize));
platforms = new CLPlatformID[((Int64)(platformsSize)) / IntPtr.Size];
OpenCLError.Validate(OpenCLDriver.clGetDeviceInfo(device, CLDeviceInfo.Platform, platformsSize, platforms, ref platformsSize));
foreach (CLPlatformID platform in platforms)
{
if (!platformsDictionary.ContainsKey(platform))
{
platformsDictionary.Add(platform, platform);
}
}
}
platforms = new CLPlatformID[platformsDictionary.Count];
Int32 index = 0;
foreach (var platform in platformsDictionary.Keys)
{
platforms[index++] = platform;
}
return new Context(clContext, new Platforms(platforms), new Devices(devices));
}
finally
{
devicesHandle.Free();
}
}