opencl.cpp

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//==------- opencl.cpp - SYCL OpenCL backend -------------------------------==//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#include <detail/kernel_impl.hpp>
#include <detail/platform_impl.hpp>
#include <detail/plugin.hpp>
#include <detail/program_impl.hpp>
#include <detail/queue_impl.hpp>
#include <sycl/sycl.hpp>
 
#include <memory>
#include <string_view>
 
namespace sycl {
inline namespace _V1 {
namespace opencl {
using namespace detail;
 
//----------------------------------------------------------------------------
// Implementation of opencl::make<platform>
__SYCL_EXPORT platform make_platform(pi_native_handle NativeHandle) {
  return detail::make_platform(NativeHandle, backend::opencl);
}
 
//----------------------------------------------------------------------------
// Implementation of opencl::make<device>
__SYCL_EXPORT device make_device(pi_native_handle NativeHandle) {
  return detail::make_device(NativeHandle, backend::opencl);
}
 
//----------------------------------------------------------------------------
// Implementation of opencl::make<context>
__SYCL_EXPORT context make_context(pi_native_handle NativeHandle) {
  return detail::make_context(NativeHandle, detail::defaultAsyncHandler,
                              backend::opencl);
}
 
//----------------------------------------------------------------------------
// Implementation of opencl::make<queue>
__SYCL_EXPORT queue make_queue(const context &Context,
                               pi_native_handle NativeHandle) {
  const auto &ContextImpl = getSyclObjImpl(Context);
  return detail::make_queue(NativeHandle, 0, Context, nullptr, false, {},
                            ContextImpl->get_async_handler(), backend::opencl);
}
 
//----------------------------------------------------------------------------
// Free functions to query OpenCL backend extensions
__SYCL_EXPORT bool has_extension(const sycl::platform &SyclPlatform,
                                 const std::string &Extension) {
  if (SyclPlatform.get_backend() != sycl::backend::opencl) {
    throw sycl::exception(
        errc::backend_mismatch,
        "has_extension can only be used with an OpenCL backend");
  }
 
  std::shared_ptr<sycl::detail::platform_impl> PlatformImpl =
      getSyclObjImpl(SyclPlatform);
  sycl::detail::pi::PiPlatform PluginPlatform = PlatformImpl->getHandleRef();
  const PluginPtr &Plugin = PlatformImpl->getPlugin();
 
  // Manual invocation of plugin API to avoid using deprecated
  // info::platform::extensions call.
  size_t ResultSize = 0;
  Plugin->call<PiApiKind::piPlatformGetInfo>(
      PluginPlatform, PI_PLATFORM_INFO_EXTENSIONS, /*param_value_size=*/0,
      /*param_value_size=*/nullptr, &ResultSize);
  if (ResultSize == 0)
    return false;
 
  std::unique_ptr<char[]> Result(new char[ResultSize]);
  Plugin->call<PiApiKind::piPlatformGetInfo>(PluginPlatform,
                                             PI_PLATFORM_INFO_EXTENSIONS,
                                             ResultSize, Result.get(), nullptr);
 
  std::string_view ExtensionsString(Result.get());
  return ExtensionsString.find(Extension) != std::string::npos;
}
 
__SYCL_EXPORT bool has_extension(const sycl::device &SyclDevice,
                                 const std::string &Extension) {
  if (SyclDevice.get_backend() != sycl::backend::opencl) {
    throw sycl::exception(
        errc::backend_mismatch,
        "has_extension can only be used with an OpenCL backend");
  }
 
  std::shared_ptr<sycl::detail::device_impl> DeviceImpl =
      getSyclObjImpl(SyclDevice);
  sycl::detail::pi::PiDevice PluginDevice = DeviceImpl->getHandleRef();
  const PluginPtr &Plugin = DeviceImpl->getPlugin();
 
  // Manual invocation of plugin API to avoid using deprecated
  // info::device::extensions call.
  size_t ResultSize = 0;
  Plugin->call<PiApiKind::piDeviceGetInfo>(
      PluginDevice, PI_DEVICE_INFO_EXTENSIONS, /*param_value_size=*/0,
      /*param_value_size=*/nullptr, &ResultSize);
  if (ResultSize == 0)
    return false;
 
  std::unique_ptr<char[]> Result(new char[ResultSize]);
  Plugin->call<PiApiKind::piDeviceGetInfo>(PluginDevice,
                                           PI_DEVICE_INFO_EXTENSIONS,
                                           ResultSize, Result.get(), nullptr);
 
  std::string_view ExtensionsString(Result.get());
  return ExtensionsString.find(Extension) != std::string::npos;
}
} // namespace opencl
} // namespace _V1
} // namespace sycl