1//===- ContextFactory.h ---------------------------------------------------===// 2// 3// The MCLinker Project 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9#ifndef MCLD_CONTEXT_FACTORY_H 10#define MCLD_CONTEXT_FACTORY_H 11#ifdef ENABLE_UNITTEST 12#include <gtest.h> 13#endif 14 15#include <mcld/LD/LDContext.h> 16#include <mcld/Support/UniqueGCFactory.h> 17#include <mcld/Support/Path.h> 18 19namespace mcld 20{ 21/** \class ContextFactory 22 * \brief ContextFactory avoids the duplicated LDContext of the same file. 23 * 24 * MCLinker is designed for efficient memory usage. Because user can give 25 * MCLinker the same input file many times on the command line, MCLinker must 26 * avoid opening identical file twice. 27 * 28 * ContextFactory is the guard to prevent redundant opening. MCLinker does not 29 * create LDContext directly. Instead, it creates LDContext by ContextFactory. 30 * ContextFactory returns the identical reference of LDContext if it's openend. 31 * 32 * @see LDContext 33 * @see UniqueGCFactoryBase 34 */ 35class ContextFactory : public UniqueGCFactoryBase<sys::fs::Path, LDContext, 0> 36{ 37public: 38 explicit ContextFactory(size_t pNum); 39 ~ContextFactory(); 40 41 LDContext* produce(); 42 LDContext* produce(const sys::fs::Path& pPath); 43}; 44 45} // namespace of mcld 46 47#endif 48 49