/usr/include/linbox/algorithms/opencl-environ.h is in liblinbox-dev 1.4.2-5build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2012 Matthew Wezowicz
*
* Written by Matthew Wezowicz <mwezz@udel.edu>
*
* ========LICENCE========
* This file is part of the library LinBox.
*
* LinBox is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* ========LICENCE========
*.
*/
#include <pthread.h>
#include <algorithm>
#include <istream>
#include <iterator>
#include <sstream>
#include <string>
#include <vector>
#include <CL/cl.h>
//#include "named-mutex.h"
#ifndef __LINBOX_opencl_environ_H
#define __LINBOX_opencl_environ_H
namespace LinBox{
/**
* Container for all pertenant information needed to use an OpenCL device,
* compile kernels for the device, track resource usage, and gain exclusive
* access to the device
*
* Complies to the OpenCL 1.0 spec
*/
class OpenCLEnviron{
private:
//Platform info
std::string platformName;
double platformVersion;
std::vector<std::string> platformExtensions;
//Device info
std::vector<std::string> deviceExtensions;
//OpenCL variables
cl_context context;
cl_device_id device;
cl_command_queue commandQueue;
cl_int errcode;
//Memory stats
unsigned long memCapacity;
unsigned long maxBufferSize;
unsigned long memInUse;
//Device type flags
bool CPU;
bool GPU;
bool ACCEL;
bool Other;
//Lock to control access to environ
#ifndef __MPI_SHARED
pthread_mutex_t* deviceLock;
#else
NamedMutex* deviceLock;
#endif
//ID number
unsigned int IDnum;
OpenCLEnviron();
OpenCLEnviron(const OpenCLEnviron&);
OpenCLEnviron& operator=(const OpenCLEnviron&);
public:
OpenCLEnviron(
std::string platformName_,
double platformVersion_,
std::vector<std::string> platformExtensions_,
cl_context context_,
cl_device_id device_,
#ifndef __MPI_SHARED
pthread_mutex_t* deviceLock_,
#else
NamedMutex* deviceLock_,
#endif
unsigned int IDnum_) :
//Init list starts here
platformName(platformName_),
platformVersion(platformVersion_),
platformExtensions(platformExtensions_),
context(context_),
device(device_),
errcode(CL_SUCCESS),
memCapacity(0L),
maxBufferSize(0L),
memInUse(0L),
CPU(false),
GPU(false),
ACCEL(false),
Other(true),
deviceLock(deviceLock_),
IDnum(IDnum_){
//Initialize command queue
clCreateCommandQueue(
context,
device,
CL_QUEUE_PROFILING_ENABLE,
&errcode);
//Get memory stats
errcode = clGetDeviceInfo(
device,
CL_DEVICE_GLOBAL_MEM_SIZE,
sizeof(cl_ulong),
&memCapacity,
NULL);
errcode = clGetDeviceInfo(
device,
CL_DEVICE_MAX_MEM_ALLOC_SIZE,
sizeof(cl_ulong),
&maxBufferSize,
NULL);
//Get device type
cl_device_type type;
errcode = clGetDeviceInfo(
device,
CL_DEVICE_TYPE,
sizeof(cl_device_type),
&type,
NULL);
CPU = (type == CL_DEVICE_TYPE_CPU);
GPU = (type == CL_DEVICE_TYPE_GPU);
ACCEL = (type == CL_DEVICE_TYPE_ACCELERATOR);
Other = ((CPU || GPU || ACCEL) == false);
//Enumerate device extensions
size_t sizeRet;
errcode = clGetDeviceInfo(
device,
CL_DEVICE_EXTENSIONS,
0,
NULL,
&sizeRet);
char* devExt = new char[sizeRet];
errcode = clGetDeviceInfo(
device,
CL_DEVICE_EXTENSIONS,
sizeRet,
devExt,
NULL);
//Parse out individual extensions into vector
std::string devExt2(devExt);
std::stringstream strstream(devExt2);
std::istream_iterator<std::string> it(strstream);
std::istream_iterator<std::string> end;
for(; it != end; it++){
deviceExtensions.push_back(*it);
}
//Deallocate memory
delete[] devExt;
}
~OpenCLEnviron(){}
/**
* getPlatformName() returns string with platform name
*/
std::string getPlatformName() const{
return platformName;
}
/**
* getPlatformVersion() returns double with platform version
*/
double getPlatformVersion() const{
return platformVersion;
}
/**
* getPlatformExtensions() returns a constant reference to the vector with
* the platform extensions supported by this environ
*/
const std::vector<std::string>& getPlatformExtensions() const{
return platformExtensions;
}
/**
* getDeviceExtensions() returns a constant reference to the vector with
* the device extensions supported by this environ
*/
const std::vector<std::string>& getDeviceExtensions() const{
return deviceExtensions;
}
/**
* getIDNum() returns the unsigned int with the OpenCLEnviron ID number
*/
unsigned int getIDNum() const{
return IDnum;
}
/**
* getContext() accessor for the context associated with environ
*/
cl_context getContext() const{
return context;
}
/**
* getDevice() accessor for the device associated with environ
*/
cl_device_id getDevice() const{
return device;
}
/**
* getCommandQueue() accessor for thecommand queue associated with environ
*/
cl_command_queue getCommandQueue() const{
return commandQueue;
}
/**
* getErrorCode() accessor for the error code associated with environ
*/
cl_int getErrorCode() const{
return errcode;
}
/**
* setErrorCode() accessor for setting error code associated with environ
*/
void setErrorCode(cl_int err){
errcode = err;
}
/**
* getMemCapacity() accessor for the memory capacity associated with environ
*/
unsigned long getMemCapacity() const{
return memCapacity;
}
/**
* getMaxBufferSize() accessor for the maximum buffer size associated
* with environ
*/
unsigned long getMaxBufferSize() const{
return maxBufferSize;
}
/**
* getMemInUse() accessor for the memory currently in use by the environ
*/
unsigned long getMemInUse() const{
return memInUse;
}
/**
* getMemAvailable() accessor for the memory available in the environ
*/
unsigned long getMemAvailable() const{
return memCapacity - memInUse;
}
/**
* memAllocated() setter for updating the memory levels
*/
void memAllocated(unsigned long alloc){
memInUse += alloc;
}
/**
* memDeallocated() setter for updating the memory levels
*/
void memDeallocated(unsigned long dealloc){
memInUse -= dealloc;
}
/**
* isCPU() accessor for the device type in the environ
*/
bool isCPU() const{
return CPU;
}
/**
* isGPU() accessor for the device type in the environ
*/
bool isGPU() const{
return GPU;
}
/**
* isAccelerator() accessor for the device type in the environ
*/
bool isAccelerator() const{
return ACCEL;
}
/**
* isOtherDevice() accessor for the device type in the environ
*/
bool isOtherDevice() const{
return Other;
}
/**
* acquireEnviron() accessor for gaining exclusive access to the environ
*/
void acquireEnviron(){
#ifndef __MPI_SHARED
pthread_mutex_lock(deviceLock);
#else
deviceLock->lock();
memInUse = deviceLock->updateLocalValue<unsigned long>("memInUse");
#endif
}
/**
* releaseEnviron() accessor for releasing exclusive access to the environ
*/
void releaseEnviron(){
#ifndef __MPI_SHARED
pthread_mutex_unlock(deviceLock);
#else
deviceLock->updateGlobalValue<unsigned long>("memInUse", memInUse);
deviceLock->unlock();
#endif
}
/**
* getDeviceLock() accessor for underlying lock in the environ
*/
#ifndef __MPI_SHARED
pthread_mutex_t* getDeviceLock(){
#else
NamedMutex* getDeviceLock(){
#endif
return deviceLock;
}
};
} /* end of namespace LinBox */
#endif /* __LINBOX_opencl_environ_H */
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