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 19 namespace 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 */ 35 class ContextFactory : public UniqueGCFactoryBase<sys::fs::Path, LDContext, 0> 36 { 37 public: 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