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_MC_CONTEXTFACTORY_H_ 10 #define MCLD_MC_CONTEXTFACTORY_H_ 11 12 #include "mcld/LD/LDContext.h" 13 #include "mcld/Support/UniqueGCFactory.h" 14 #include "mcld/Support/Path.h" 15 16 namespace mcld { 17 /** \class ContextFactory 18 * \brief ContextFactory avoids the duplicated LDContext of the same file. 19 * 20 * MCLinker is designed for efficient memory usage. Because user can give 21 * MCLinker the same input file many times on the command line, MCLinker must 22 * avoid opening identical file twice. 23 * 24 * ContextFactory is the guard to prevent redundant opening. MCLinker does not 25 * create LDContext directly. Instead, it creates LDContext by ContextFactory. 26 * ContextFactory returns the identical reference of LDContext if it's openend. 27 * 28 * @see LDContext 29 * @see UniqueGCFactoryBase 30 */ 31 class ContextFactory : public UniqueGCFactoryBase<sys::fs::Path, LDContext, 0> { 32 public: 33 explicit ContextFactory(size_t pNum); 34 ~ContextFactory(); 35 36 LDContext* produce(); 37 LDContext* produce(const sys::fs::Path& pPath); 38 LDContext* produce(const char* pPath); 39 }; 40 41 } // namespace mcld 42 43 #endif // MCLD_MC_CONTEXTFACTORY_H_ 44