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/***************************************************************************
ocl_texture.h
-------------------
W. Michael Brown
Utilities for dealing with OpenCL textures
__________________________________________________________________________
This file is part of the Geryon Unified Coprocessor Library (UCL)
__________________________________________________________________________
begin : Fri Jul 2 2010
copyright : (C) 2010 by W. Michael Brown
email : brownw@ornl.gov
***************************************************************************/
/* -----------------------------------------------------------------------
Copyright (2010) Sandia Corporation. Under the terms of Contract
DE-AC04-94AL85000 with Sandia Corporation, the U.S. Government retains
certain rights in this software. This software is distributed under
the Simplified BSD License.
----------------------------------------------------------------------- */
#ifndef OCL_TEXTURE
#define OCL_TEXTURE
#include "ocl_kernel.h"
#include "ocl_mat.h"
namespace ucl_opencl {
/// Class storing a texture reference
class UCL_Texture {
public:
UCL_Texture() {}
~UCL_Texture() {}
/// Construct with a specified texture reference
inline UCL_Texture(UCL_Program &prog, const char *texture_name) { }
/// Set the texture reference for this object
inline void get_texture(UCL_Program &prog, const char *texture_name) { }
/// Bind a float array where each fetch grabs a vector of length numel
template<class mat_typ>
inline void bind_float(mat_typ &vec, const unsigned numel) { }
/// Unbind the texture reference from the memory allocation
inline void unbind() { }
/// Make a texture reference available to kernel
inline void allow(UCL_Kernel &kernel) { }
private:
friend class UCL_Kernel;
};
/// Class storing a const global memory reference
class UCL_Const {
public:
UCL_Const() : _global_bytes(0), _active(false) {}
~UCL_Const() { clear(); }
/// Construct with a specified global reference
inline UCL_Const(UCL_Program &prog, const char *global_name)
{ get_global(prog,global_name); }
/// Set the global reference for this object
inline void get_global(UCL_Program &prog, const char *global_name) {
if (_active) {
CL_DESTRUCT_CALL(clReleaseContext(_context));
CL_DESTRUCT_CALL(clReleaseCommandQueue(_cq));
}
_active = true;
_context = prog._context;
_cq = prog._cq;
CL_SAFE_CALL(clRetainContext(_context));
CL_SAFE_CALL(clRetainCommandQueue(_cq));
}
/// Copy from array on host to const memory
template <class numtyp>
inline void update_device(UCL_H_Vec<numtyp> &src, const int numel) {
const int bytes=numel*sizeof(numtyp);
if (_global_bytes < bytes) {
if (_global_bytes) CL_SAFE_CALL(clReleaseMemObject(_global));
cl_int e;
_global = clCreateBuffer(_context, CL_MEM_READ_ONLY, bytes, NULL, &e);
CL_SAFE_CALL(e);
}
CL_SAFE_CALL(clEnqueueWriteBuffer(_cq, _global, CL_FALSE, 0, bytes,
(void *)src.begin(), 0, NULL, NULL));
}
/// Get device ptr associated with object
inline const cl_mem * begin() const { return &_global; }
inline void clear() {
if (_global_bytes) CL_SAFE_CALL(clReleaseMemObject(_global));
if (_active) {
CL_DESTRUCT_CALL(clReleaseContext(_context));
CL_DESTRUCT_CALL(clReleaseCommandQueue(_cq));
}
_global_bytes=0;
_active=false;
}
private:
cl_mem _global;
size_t _global_bytes;
cl_context _context;
cl_command_queue _cq;
bool _active;
};
} // namespace
#endif
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