BitMaker.Miner.Gpu.GpuMiner.InitializeOpenCL C# (CSharp) Method

        internal void InitializeOpenCL()
        {
            // only initialize once
            if (clKernel != null)
                return;

            // unused memory so Cloo doesn't break with a null ptr
            var userDataPtr = Marshal.AllocCoTaskMem(512);

            try
            {
                clDevice = Gpu.CLDevice;

                // context we'll be working underneath
                clContext = new ComputeContext(
                    new[] { clDevice },
                    new ComputeContextPropertyList(clDevice.Platform),
                    (p1, p2, p3, p4) => { },
                    userDataPtr);

                // queue to control device
                clQueue = new ComputeCommandQueue(clContext, clDevice, ComputeCommandQueueFlags.None);

                // buffers to store kernel output
                clBuffer0 = new ComputeBuffer<uint>(clContext, ComputeMemoryFlags.ReadOnly, 16);
                clBuffer1 = new ComputeBuffer<uint>(clContext, ComputeMemoryFlags.ReadOnly, 16);

                // obtain the program
                clProgram = new ComputeProgram(clContext, Gpu.GetSource());

                var b = new StringBuilder();
                if (Gpu.WorkSize > 0)
                    b.Append(" -D WORKSIZE=").Append(Gpu.WorkSize);
                if (Gpu.HasBitAlign)
                    b.Append(" -D BITALIGN");
                if (Gpu.HasBfiInt)
                    b.Append(" -D BFIINT");

                try
                {
                    // build kernel for device
                    clProgram.Build(new[] { clDevice }, b.ToString(), (p1, p2) => { }, userDataPtr);
                }
                catch (ComputeException)
                {
                    throw new Exception(clProgram.GetBuildLog(clDevice));
                }

                clKernel = clProgram.CreateKernel("search");
            }
            finally
            {
                Marshal.FreeCoTaskMem(userDataPtr);
            }
        }