foreman
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//
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// Copyright (c) 2013 Advanced Micro Devices, Inc. All rights reserved.
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//
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#ifndef _OPENCL_RUNTIME_DEVICE_HSA_SERVICES_SYMBOL_LOADER_HPP_
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#define _OPENCL_RUNTIME_DEVICE_HSA_SERVICES_SYMBOL_LOADER_HPP_
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// File: services_symbol_loader.hpp
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// The main purpose of this file (class ServicesApiSymbols), is to load the HSA
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// API function symbol HsaGetServicesApiTable() from hsaservices DLL/so module.
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// This function outputs HsaServicesApiTable which has pointers to the rest of the
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// hsaservices API functions, which should be used to invoke the API functions.
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#include "services.h"
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#include "hsainterop.h"
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#include "hsaagent.h"
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#include <string>
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// In case of change in the name of hsaservices dll name, change the
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// #define SERVICES_DLL_NAME value. this is the only place the DLL name should
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// be changed or referred to.
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#define SERVICES_DLL_NAME "hsaservices" LP64_ONLY("64")
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// Convention: The typedefed function name must be prefixed with pfn_ indicating
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// it as pointer-to-function.
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typedef HsaStatus (*pfn_HsaGetServicesApiTable)(const HsaServicesApiTable **api_table);
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// Singleton ServicesApiSymbols class contains the module handle and loaded
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// symbols of one accessor API accessor function.
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// To call hsaservices API funciton, instance of this class must be used.
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// Example:
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// // In initialization code
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// const HsaServicesApiTable *servicesapi = NULL;
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// ServicesApiSymbols::Instance().HsaGetServicesApiTable(&servicesapi);
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// ...
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// ...
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// // Calling the services api.
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// servicesapi->HsaGetDevices(...);
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// servicesapi->HsaRegisterMemory(...);
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class ServicesApiSymbols {
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public:
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// Only the access function symbol is loaded, which in turn has pointers to
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// rest of the hsaservices api.
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pfn_HsaGetServicesApiTable HsaGetServicesApiTable;
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static ServicesApiSymbols& Instance() {
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if (instance_ == NULL) {
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instance_ = new ServicesApiSymbols();
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}
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return *instance_;
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}
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static void teardown(){
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if (instance_ != NULL){
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delete instance_;
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}
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}
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static bool IsDllLoaded(){
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return Instance().services_dll_handle_ ? true : false;
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};
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private:
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static ServicesApiSymbols* instance_;
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// Force singleton pattern.
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explicit ServicesApiSymbols();
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~ServicesApiSymbols();
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ServicesApiSymbols(const ServicesApiSymbols &) {}
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const ServicesApiSymbols &operator=(const ServicesApiSymbols &) {
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return *this;
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}
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// Data.
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void *services_dll_handle_;
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const std::string services_dll_name_;
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};
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#endif // _OPENCL_RUNTIME_DEVICE_HSA_SERVICES_SYMBOL_LOADER_HPP_
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