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/*
* Copyright (c) 2011, Denis Steckelmacher <steckdenis@yahoo.fr>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the copyright holder nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \file cpu/device.h
* \brief CPU device
*/
#ifndef __CPU_DEVICE_H__
#define __CPU_DEVICE_H__
#include "../deviceinterface.h"
#include <pthread.h>
#include <list>
#include <string>
//TODO: #define MAX_PARTITION_PROPS (2)
#define MAX_PARTITION_PROPS (1)
namespace Coal
{
class MemObject;
class Event;
class Program;
class Kernel;
/**
* \brief CPU device
*
* This class is the base of all the CPU-accelerated OpenCL processing. It
* creates and manages subclasses such as \c Coal::DeviceBuffer,
* \c Coal::DeviceProgram and \c Coal::DeviceKernel.
*
* This class and the aforementioned ones work together to compile and run
* kernels using the LLVM JIT, manage buffers, provide built-in functions
* and do all of this in a multithreaded fashion using worker threads.
*
* \see \ref events
*/
class CPUDevice : public DeviceInterface
{
public:
CPUDevice(DeviceInterface *parent_device, unsigned int cores);
~CPUDevice();
/**
* \brief Initialize the CPU device
*
* This function creates the worker threads and get information about
* the host system for the \c numCPUs() and \c cpuMhz functions.
*/
void init();
cl_int info(cl_device_info param_name,
size_t param_value_size,
void *param_value,
size_t *param_value_size_ret) const;
DeviceBuffer *createDeviceBuffer(MemObject *buffer, cl_int *rs);
DeviceProgram *createDeviceProgram(Program *program);
DeviceKernel *createDeviceKernel(Kernel *kernel,
llvm::Function *function);
cl_int initEventDeviceData(Event *event);
void freeEventDeviceData(Event *event);
void pushEvent(Event *event);
Event *getEvent(bool &stop);
bool gotEnoughToWorkOn();
cl_int createSubDevices(
const cl_device_partition_property * properties,
cl_uint num_devices,
cl_device_id * out_devices,
cl_uint * num_devices_ret);
void setProperties(const cl_device_partition_property *properties);
unsigned int numCPUs() const; /*!< \brief Number of cores in this (sub)device */
float cpuMhz() const; /*!< \brief Speed of the CPU in Mhz */
DeviceInterface * parentDevice() const { return p_parent_device; }
std::string builtinsHeader(void) const { return "cpu.h"; }
private:
unsigned int p_cores, p_num_events;
float p_cpu_mhz;
std::string p_device_name;
pthread_t *p_workers;
std::list<Event *> p_events;
pthread_cond_t p_events_cond;
pthread_mutex_t p_events_mutex;
bool p_stop, p_initialized;
DeviceInterface *p_parent_device;
cl_device_partition_property p_partition_properties[MAX_PARTITION_PROPS];
};
}
#endif
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