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/*
* Copyright (c) 2019 ARM Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "arm_compute/runtime/CL/CLHelpers.h"
#include "arm_compute/core/CL/CLHelpers.h"
#include "arm_compute/core/Error.h"
namespace
{
#if defined(ARM_COMPUTE_ASSERTS_ENABLED)
void printf_callback(const char *buffer, unsigned int len, size_t complete, void *user_data)
{
printf("%.*s", len, buffer);
}
#endif /* defined(ARM_COMPUTE_ASSERTS_ENABLED) */
/** This initialises the properties vector with the configuration to be used when creating the opencl context
*
* @param[in] platform The opencl platform used to create the context
* @param[in] device The opencl device to be used to create the context
* @param[in] prop An array of properties to be initialised
*
* @note In debug builds, this function will enable cl_arm_printf if it's supported.
*
* @return A pointer to the context properties which can be used to create an opencl context
*/
void initialise_context_properties(const cl::Platform &platform, const cl::Device &device, std::array<cl_context_properties, 7> &prop)
{
ARM_COMPUTE_UNUSED(device);
#if defined(ARM_COMPUTE_ASSERTS_ENABLED)
// Query devices in the context for cl_arm_printf support
if(arm_compute::device_supports_extension(device, "cl_arm_printf"))
{
// Create a cl_context with a printf_callback and user specified buffer size.
std::array<cl_context_properties, 7> properties_printf =
{
CL_CONTEXT_PLATFORM, reinterpret_cast<cl_context_properties>(platform()),
// Enable a printf callback function for this context.
CL_PRINTF_CALLBACK_ARM, reinterpret_cast<cl_context_properties>(printf_callback),
// Request a minimum printf buffer size of 4MB for devices in the
// context that support this extension.
CL_PRINTF_BUFFERSIZE_ARM, 0x1000,
0
};
prop = properties_printf;
}
else
#endif // defined(ARM_COMPUTE_ASSERTS_ENABLED)
{
std::array<cl_context_properties, 3> properties =
{
CL_CONTEXT_PLATFORM, reinterpret_cast<cl_context_properties>(platform()),
0
};
std::copy(properties.begin(), properties.end(), prop.begin());
};
}
} //namespace
namespace arm_compute
{
std::tuple<cl::Context, cl::Device, cl_int>
create_opencl_context_and_device()
{
ARM_COMPUTE_ERROR_ON(!opencl_is_available());
std::vector<cl::Platform> platforms;
cl::Platform::get(&platforms);
ARM_COMPUTE_ERROR_ON_MSG(platforms.size() == 0, "Couldn't find any OpenCL platform");
cl::Platform p = platforms[0];
cl::Device device;
std::vector<cl::Device> platform_devices;
p.getDevices(CL_DEVICE_TYPE_DEFAULT, &platform_devices);
ARM_COMPUTE_ERROR_ON_MSG(platform_devices.size() == 0, "Couldn't find any OpenCL device");
device = platform_devices[0];
cl_int err = CL_SUCCESS;
std::array<cl_context_properties, 7> properties = { 0, 0, 0, 0, 0, 0, 0 };
initialise_context_properties(p, device, properties);
cl::Context cl_context = cl::Context(device, properties.data(), nullptr, nullptr, &err);
ARM_COMPUTE_ERROR_ON_MSG(err != CL_SUCCESS, "Failed to create OpenCL context");
return std::make_tuple(cl_context, device, err);
}
} // namespace arm_compute
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