/usr/include/viennacl/backend/memory.hpp is in libviennacl-dev 1.5.2-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 | #ifndef VIENNACL_BACKEND_MEMORY_HPP
#define VIENNACL_BACKEND_MEMORY_HPP
/* =========================================================================
Copyright (c) 2010-2014, Institute for Microelectronics,
Institute for Analysis and Scientific Computing,
TU Wien.
Portions of this software are copyright by UChicago Argonne, LLC.
-----------------
ViennaCL - The Vienna Computing Library
-----------------
Project Head: Karl Rupp rupp@iue.tuwien.ac.at
(A list of authors and contributors can be found in the PDF manual)
License: MIT (X11), see file LICENSE in the base directory
============================================================================= */
/** @file viennacl/backend/memory.hpp
@brief Main interface routines for memory management
*/
#include <vector>
#include <cassert>
#include "viennacl/forwards.h"
#include "viennacl/backend/mem_handle.hpp"
#include "viennacl/context.hpp"
#include "viennacl/traits/handle.hpp"
#include "viennacl/traits/context.hpp"
#include "viennacl/backend/util.hpp"
#include "viennacl/backend/cpu_ram.hpp"
#ifdef VIENNACL_WITH_OPENCL
#include "viennacl/backend/opencl.hpp"
#include "viennacl/ocl/backend.hpp"
#endif
#ifdef VIENNACL_WITH_CUDA
#include "viennacl/backend/cuda.hpp"
#endif
namespace viennacl
{
namespace backend
{
// if a user compiles with CUDA, it is reasonable to expect that CUDA should be the default
/** @brief Synchronizes the execution. finish() will only return after all compute kernels (CUDA, OpenCL) have completed. */
inline void finish()
{
#ifdef VIENNACL_WITH_CUDA
cudaDeviceSynchronize();
#endif
#ifdef VIENNACL_WITH_OPENCL
viennacl::ocl::get_queue().finish();
#endif
}
// Requirements for backend:
// ---- Memory ----
//
// * memory_create(size, host_ptr)
// * memory_copy(src, dest, offset_src, offset_dest, size)
// * memory_write(src, offset, size, ptr)
// * memory_read(src, offset, size, ptr)
//
/** @brief Creates an array of the specified size. If the second argument is provided, the buffer is initialized with data from that pointer.
*
* This is the generic version for CPU RAM, CUDA, and OpenCL. Creates the memory in the currently active memory domain.
*
* @param handle The generic wrapper handle for multiple memory domains which will hold the new buffer.
* @param size_in_bytes Number of bytes to allocate
* @param ctx Optional context in which the matrix is created (one out of multiple OpenCL contexts, CUDA, host)
* @param host_ptr Pointer to data which will be copied to the new array. Must point to at least 'size_in_bytes' bytes of data.
*
*/
inline void memory_create(mem_handle & handle, vcl_size_t size_in_bytes, viennacl::context const & ctx, const void * host_ptr = NULL)
{
if (size_in_bytes > 0)
{
if (handle.get_active_handle_id() == MEMORY_NOT_INITIALIZED)
handle.switch_active_handle_id(ctx.memory_type());
switch(handle.get_active_handle_id())
{
case MAIN_MEMORY:
handle.ram_handle() = cpu_ram::memory_create(size_in_bytes, host_ptr);
handle.raw_size(size_in_bytes);
break;
#ifdef VIENNACL_WITH_OPENCL
case OPENCL_MEMORY:
handle.opencl_handle().context(ctx.opencl_context());
handle.opencl_handle() = opencl::memory_create(handle.opencl_handle().context(), size_in_bytes, host_ptr);
handle.raw_size(size_in_bytes);
break;
#endif
#ifdef VIENNACL_WITH_CUDA
case CUDA_MEMORY:
handle.cuda_handle() = cuda::memory_create(size_in_bytes, host_ptr);
handle.raw_size(size_in_bytes);
break;
#endif
case MEMORY_NOT_INITIALIZED:
throw memory_exception("not initialised!");
default:
throw memory_exception("unknown memory handle!");
}
}
}
/*
inline void memory_create(mem_handle & handle, vcl_size_t size_in_bytes, const void * host_ptr = NULL)
{
viennacl::context ctx(default_memory_type());
memory_create(handle, size_in_bytes, ctx, host_ptr);
}*/
/** @brief Copies 'bytes_to_copy' bytes from address 'src_buffer + src_offset' to memory starting at address 'dst_buffer + dst_offset'.
*
* This is the generic version for CPU RAM, CUDA, and OpenCL. Copies the memory in the currently active memory domain.
*
*
* @param src_buffer A smart pointer to the begin of an allocated buffer
* @param dst_buffer A smart pointer to the end of an allocated buffer
* @param src_offset Offset of the first byte to be written from the address given by 'src_buffer' (in bytes)
* @param dst_offset Offset of the first byte to be written to the address given by 'dst_buffer' (in bytes)
* @param bytes_to_copy Number of bytes to be copied
*/
inline void memory_copy(mem_handle const & src_buffer,
mem_handle & dst_buffer,
vcl_size_t src_offset,
vcl_size_t dst_offset,
vcl_size_t bytes_to_copy)
{
assert( src_buffer.get_active_handle_id() == dst_buffer.get_active_handle_id() && bool("memory_copy() must be called on buffers from the same domain") );
if (bytes_to_copy > 0)
{
switch(src_buffer.get_active_handle_id())
{
case MAIN_MEMORY:
cpu_ram::memory_copy(src_buffer.ram_handle(), dst_buffer.ram_handle(), src_offset, dst_offset, bytes_to_copy);
break;
#ifdef VIENNACL_WITH_OPENCL
case OPENCL_MEMORY:
opencl::memory_copy(src_buffer.opencl_handle(), dst_buffer.opencl_handle(), src_offset, dst_offset, bytes_to_copy);
break;
#endif
#ifdef VIENNACL_WITH_CUDA
case CUDA_MEMORY:
cuda::memory_copy(src_buffer.cuda_handle(), dst_buffer.cuda_handle(), src_offset, dst_offset, bytes_to_copy);
break;
#endif
case MEMORY_NOT_INITIALIZED:
throw memory_exception("not initialised!");
default:
throw memory_exception("unknown memory handle!");
}
}
}
// TODO: Refine this concept. Maybe move to constructor?
/** @brief A 'shallow' copy operation from an initialized buffer to an uninitialized buffer.
* The uninitialized buffer just copies the raw handle.
*/
inline void memory_shallow_copy(mem_handle const & src_buffer,
mem_handle & dst_buffer)
{
assert( (dst_buffer.get_active_handle_id() == MEMORY_NOT_INITIALIZED) && bool("Shallow copy on already initialized memory not supported!"));
switch(src_buffer.get_active_handle_id())
{
case MAIN_MEMORY:
dst_buffer.switch_active_handle_id(src_buffer.get_active_handle_id());
dst_buffer.ram_handle() = src_buffer.ram_handle();
dst_buffer.raw_size(src_buffer.raw_size());
break;
#ifdef VIENNACL_WITH_OPENCL
case OPENCL_MEMORY:
dst_buffer.switch_active_handle_id(src_buffer.get_active_handle_id());
dst_buffer.opencl_handle() = src_buffer.opencl_handle();
dst_buffer.raw_size(src_buffer.raw_size());
break;
#endif
#ifdef VIENNACL_WITH_CUDA
case CUDA_MEMORY:
dst_buffer.switch_active_handle_id(src_buffer.get_active_handle_id());
dst_buffer.cuda_handle() = src_buffer.cuda_handle();
dst_buffer.raw_size(src_buffer.raw_size());
break;
#endif
case MEMORY_NOT_INITIALIZED:
throw memory_exception("not initialised!");
default:
throw memory_exception("unknown memory handle!");
}
}
/** @brief Writes data from main RAM identified by 'ptr' to the buffer identified by 'dst_buffer'
*
* This is the generic version for CPU RAM, CUDA, and OpenCL. Writes the memory in the currently active memory domain.
*
* @param dst_buffer A smart pointer to the beginning of an allocated buffer
* @param dst_offset Offset of the first written byte from the beginning of 'dst_buffer' (in bytes)
* @param bytes_to_write Number of bytes to be written
* @param ptr Pointer to the first byte to be written
* @param async Whether the operation should be asynchronous
*/
inline void memory_write(mem_handle & dst_buffer,
vcl_size_t dst_offset,
vcl_size_t bytes_to_write,
const void * ptr,
bool async = false)
{
if (bytes_to_write > 0)
{
switch(dst_buffer.get_active_handle_id())
{
case MAIN_MEMORY:
cpu_ram::memory_write(dst_buffer.ram_handle(), dst_offset, bytes_to_write, ptr, async);
break;
#ifdef VIENNACL_WITH_OPENCL
case OPENCL_MEMORY:
opencl::memory_write(dst_buffer.opencl_handle(), dst_offset, bytes_to_write, ptr, async);
break;
#endif
#ifdef VIENNACL_WITH_CUDA
case CUDA_MEMORY:
cuda::memory_write(dst_buffer.cuda_handle(), dst_offset, bytes_to_write, ptr, async);
break;
#endif
case MEMORY_NOT_INITIALIZED:
throw memory_exception("not initialised!");
default:
throw memory_exception("unknown memory handle!");
}
}
}
/** @brief Reads data from a buffer back to main RAM.
*
* This is the generic version for CPU RAM, CUDA, and OpenCL. Reads the memory from the currently active memory domain.
*
* @param src_buffer A smart pointer to the beginning of an allocated source buffer
* @param src_offset Offset of the first byte to be read from the beginning of src_buffer (in bytes_
* @param bytes_to_read Number of bytes to be read
* @param ptr Location in main RAM where to read data should be written to
* @param async Whether the operation should be asynchronous
*/
inline void memory_read(mem_handle const & src_buffer,
vcl_size_t src_offset,
vcl_size_t bytes_to_read,
void * ptr,
bool async = false)
{
//finish(); //Fixes some issues with AMD APP SDK. However, might sacrifice a few percents of performance in some cases.
if (bytes_to_read > 0)
{
switch(src_buffer.get_active_handle_id())
{
case MAIN_MEMORY:
cpu_ram::memory_read(src_buffer.ram_handle(), src_offset, bytes_to_read, ptr, async);
break;
#ifdef VIENNACL_WITH_OPENCL
case OPENCL_MEMORY:
opencl::memory_read(src_buffer.opencl_handle(), src_offset, bytes_to_read, ptr, async);
break;
#endif
#ifdef VIENNACL_WITH_CUDA
case CUDA_MEMORY:
cuda::memory_read(src_buffer.cuda_handle(), src_offset, bytes_to_read, ptr, async);
break;
#endif
case MEMORY_NOT_INITIALIZED:
throw memory_exception("not initialised!");
default:
throw memory_exception("unknown memory handle!");
}
}
}
namespace detail
{
template <typename T>
vcl_size_t element_size(memory_types /* mem_type */)
{
return sizeof(T);
}
template <>
inline vcl_size_t element_size<unsigned long>(memory_types
#ifdef VIENNACL_WITH_OPENCL
mem_type //in order to compile cleanly at -Wextra in GCC
#endif
)
{
#ifdef VIENNACL_WITH_OPENCL
if (mem_type == OPENCL_MEMORY)
return sizeof(cl_ulong);
#endif
return sizeof(unsigned long);
}
template <>
inline vcl_size_t element_size<long>(memory_types
#ifdef VIENNACL_WITH_OPENCL
mem_type //in order to compile cleanly at -Wextra in GCC
#endif
)
{
#ifdef VIENNACL_WITH_OPENCL
if (mem_type == OPENCL_MEMORY)
return sizeof(cl_long);
#endif
return sizeof(long);
}
template <>
inline vcl_size_t element_size<unsigned int>(memory_types
#ifdef VIENNACL_WITH_OPENCL
mem_type //in order to compile cleanly at -Wextra in GCC
#endif
)
{
#ifdef VIENNACL_WITH_OPENCL
if (mem_type == OPENCL_MEMORY)
return sizeof(cl_uint);
#endif
return sizeof(unsigned int);
}
template <>
inline vcl_size_t element_size<int>(memory_types
#ifdef VIENNACL_WITH_OPENCL
mem_type //in order to compile cleanly at -Wextra in GCC
#endif
)
{
#ifdef VIENNACL_WITH_OPENCL
if (mem_type == OPENCL_MEMORY)
return sizeof(cl_int);
#endif
return sizeof(int);
}
}
/** @brief Switches the active memory domain within a memory handle. Data is copied if the new active domain differs from the old one. Memory in the source handle is not free'd. */
template <typename DataType>
void switch_memory_context(mem_handle & handle, viennacl::context new_ctx)
{
if (handle.get_active_handle_id() == new_ctx.memory_type())
return;
if (handle.get_active_handle_id() == viennacl::MEMORY_NOT_INITIALIZED || handle.raw_size() == 0)
{
handle.switch_active_handle_id(new_ctx.memory_type());
#ifdef VIENNACL_WITH_OPENCL
if (new_ctx.memory_type() == OPENCL_MEMORY)
handle.opencl_handle().context(new_ctx.opencl_context());
#endif
return;
}
vcl_size_t size_dst = detail::element_size<DataType>(handle.get_active_handle_id());
vcl_size_t size_src = detail::element_size<DataType>(new_ctx.memory_type());
if (size_dst != size_src) // OpenCL data element size not the same as host data element size
{
throw "Heterogeneous data element sizes not yet supported!";
}
else //no data conversion required
{
if (handle.get_active_handle_id() == MAIN_MEMORY) //we can access the existing data directly
{
switch (new_ctx.memory_type())
{
#ifdef VIENNACL_WITH_OPENCL
case OPENCL_MEMORY:
handle.opencl_handle().context(new_ctx.opencl_context());
handle.opencl_handle() = opencl::memory_create(handle.opencl_handle().context(), handle.raw_size(), handle.ram_handle().get());
break;
#endif
#ifdef VIENNACL_WITH_CUDA
case CUDA_MEMORY:
handle.cuda_handle() = cuda::memory_create(handle.raw_size(), handle.ram_handle().get());
break;
#endif
case MAIN_MEMORY:
default:
throw "Invalid destination domain";
}
}
#ifdef VIENNACL_WITH_OPENCL
else if (handle.get_active_handle_id() == OPENCL_MEMORY) // data can be dumped into destination directly
{
std::vector<DataType> buffer;
switch (new_ctx.memory_type())
{
case MAIN_MEMORY:
handle.ram_handle() = cpu_ram::memory_create(handle.raw_size());
opencl::memory_read(handle.opencl_handle(), 0, handle.raw_size(), handle.ram_handle().get());
break;
#ifdef VIENNACL_WITH_CUDA
case CUDA_MEMORY:
buffer.resize(handle.raw_size() / sizeof(DataType));
opencl::memory_read(handle.opencl_handle(), 0, handle.raw_size(), &(buffer[0]));
cuda::memory_create(handle.cuda_handle(), handle.raw_size(), &(buffer[0]));
break;
#endif
default:
throw "Invalid destination domain";
}
}
#endif
#ifdef VIENNACL_WITH_CUDA
else //CUDA_MEMORY
{
std::vector<DataType> buffer;
// write
switch (new_ctx.memory_type())
{
case MAIN_MEMORY:
handle.ram_handle() = cpu_ram::memory_create(handle.raw_size());
cuda::memory_read(handle.cuda_handle(), 0, handle.raw_size(), handle.ram_handle().get());
break;
#ifdef VIENNACL_WITH_OPENCL
case OPENCL_MEMORY:
buffer.resize(handle.raw_size() / sizeof(DataType));
cuda::memory_read(handle.cuda_handle(), 0, handle.raw_size(), &(buffer[0]));
handle.opencl_handle() = opencl::memory_create(handle.raw_size(), &(buffer[0]));
break;
#endif
default:
throw "Unsupported source memory domain";
}
}
#endif
// everything succeeded so far, now switch to new domain:
handle.switch_active_handle_id(new_ctx.memory_type());
} // no data conversion
}
/** @brief Copies data of the provided 'DataType' from 'handle_src' to 'handle_dst' and converts the data if the binary representation of 'DataType' among the memory domains differs. */
template <typename DataType>
void typesafe_memory_copy(mem_handle const & handle_src, mem_handle & handle_dst)
{
if (handle_dst.get_active_handle_id() == MEMORY_NOT_INITIALIZED)
handle_dst.switch_active_handle_id(default_memory_type());
vcl_size_t element_size_src = detail::element_size<DataType>(handle_src.get_active_handle_id());
vcl_size_t element_size_dst = detail::element_size<DataType>(handle_dst.get_active_handle_id());
if (element_size_src != element_size_dst)
{
// Data needs to be converted.
typesafe_host_array<DataType> buffer_src(handle_src);
typesafe_host_array<DataType> buffer_dst(handle_dst, handle_src.raw_size() / element_size_src);
//
// Step 1: Fill buffer_dst depending on where the data resides:
//
DataType const * src_data;
switch (handle_src.get_active_handle_id())
{
case MAIN_MEMORY:
src_data = reinterpret_cast<DataType const *>(handle_src.ram_handle().get());
for (vcl_size_t i=0; i<buffer_dst.size(); ++i)
buffer_dst.set(i, src_data[i]);
break;
#ifdef VIENNACL_WITH_OPENCL
case OPENCL_MEMORY:
buffer_src.resize(handle_src, handle_src.raw_size() / element_size_src);
opencl::memory_read(handle_src.opencl_handle(), 0, buffer_src.raw_size(), buffer_src.get());
for (vcl_size_t i=0; i<buffer_dst.size(); ++i)
buffer_dst.set(i, buffer_src[i]);
break;
#endif
#ifdef VIENNACL_WITH_CUDA
case CUDA_MEMORY:
buffer_src.resize(handle_src, handle_src.raw_size() / element_size_src);
cuda::memory_read(handle_src.cuda_handle(), 0, buffer_src.raw_size(), buffer_src.get());
for (vcl_size_t i=0; i<buffer_dst.size(); ++i)
buffer_dst.set(i, buffer_src[i]);
break;
#endif
default:
throw "unsupported memory domain";
}
//
// Step 2: Write to destination
//
if (handle_dst.raw_size() == buffer_dst.raw_size())
viennacl::backend::memory_write(handle_dst, 0, buffer_dst.raw_size(), buffer_dst.get());
else
viennacl::backend::memory_create(handle_dst, buffer_dst.raw_size(), viennacl::traits::context(handle_dst), buffer_dst.get());
}
else
{
// No data conversion required.
typesafe_host_array<DataType> buffer(handle_src);
switch (handle_src.get_active_handle_id())
{
case MAIN_MEMORY:
switch (handle_dst.get_active_handle_id())
{
case MAIN_MEMORY:
case OPENCL_MEMORY:
case CUDA_MEMORY:
if (handle_dst.raw_size() == handle_src.raw_size())
viennacl::backend::memory_write(handle_dst, 0, handle_src.raw_size(), handle_src.ram_handle().get());
else
viennacl::backend::memory_create(handle_dst, handle_src.raw_size(), viennacl::traits::context(handle_dst), handle_src.ram_handle().get());
break;
default:
throw "unsupported destination memory domain";
}
break;
case OPENCL_MEMORY:
switch (handle_dst.get_active_handle_id())
{
case MAIN_MEMORY:
if (handle_dst.raw_size() != handle_src.raw_size())
viennacl::backend::memory_create(handle_dst, handle_src.raw_size(), viennacl::traits::context(handle_dst));
viennacl::backend::memory_read(handle_src, 0, handle_src.raw_size(), handle_dst.ram_handle().get());
break;
case OPENCL_MEMORY:
if (handle_dst.raw_size() != handle_src.raw_size())
viennacl::backend::memory_create(handle_dst, handle_src.raw_size(), viennacl::traits::context(handle_dst));
viennacl::backend::memory_copy(handle_src, handle_dst, 0, 0, handle_src.raw_size());
break;
case CUDA_MEMORY:
if (handle_dst.raw_size() != handle_src.raw_size())
viennacl::backend::memory_create(handle_dst, handle_src.raw_size(), viennacl::traits::context(handle_dst));
buffer.resize(handle_src, handle_src.raw_size() / element_size_src);
viennacl::backend::memory_read(handle_src, 0, handle_src.raw_size(), buffer.get());
viennacl::backend::memory_write(handle_dst, 0, handle_src.raw_size(), buffer.get());
break;
default:
throw "unsupported destination memory domain";
}
break;
case CUDA_MEMORY:
switch (handle_dst.get_active_handle_id())
{
case MAIN_MEMORY:
if (handle_dst.raw_size() != handle_src.raw_size())
viennacl::backend::memory_create(handle_dst, handle_src.raw_size(), viennacl::traits::context(handle_dst));
viennacl::backend::memory_read(handle_src, 0, handle_src.raw_size(), handle_dst.ram_handle().get());
break;
case OPENCL_MEMORY:
if (handle_dst.raw_size() != handle_src.raw_size())
viennacl::backend::memory_create(handle_dst, handle_src.raw_size(), viennacl::traits::context(handle_dst));
buffer.resize(handle_src, handle_src.raw_size() / element_size_src);
viennacl::backend::memory_read(handle_src, 0, handle_src.raw_size(), buffer.get());
viennacl::backend::memory_write(handle_dst, 0, handle_src.raw_size(), buffer.get());
break;
case CUDA_MEMORY:
if (handle_dst.raw_size() != handle_src.raw_size())
viennacl::backend::memory_create(handle_dst, handle_src.raw_size(), viennacl::traits::context(handle_dst));
viennacl::backend::memory_copy(handle_src, handle_dst, 0, 0, handle_src.raw_size());
break;
default:
throw "unsupported destination memory domain";
}
break;
default:
throw "unsupported source memory domain";
}
}
}
} //backend
//
// Convenience layer:
//
/** @brief Generic convenience routine for migrating data of an object to a new memory domain */
template <typename T>
void switch_memory_context(T & obj, viennacl::context new_ctx)
{
obj.switch_memory_context(new_ctx);
}
} //viennacl
#endif
|