ContextFactory.h revision 533eae20118036f425f27bf0536ef0ccbb090b65
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 16namespace mcld 17{ 18/** \class ContextFactory 19 * \brief ContextFactory avoids the duplicated LDContext of the same file. 20 * 21 * MCLinker is designed for efficient memory usage. Because user can give 22 * MCLinker the same input file many times on the command line, MCLinker must 23 * avoid opening identical file twice. 24 * 25 * ContextFactory is the guard to prevent redundant opening. MCLinker does not 26 * create LDContext directly. Instead, it creates LDContext by ContextFactory. 27 * ContextFactory returns the identical reference of LDContext if it's openend. 28 * 29 * @see LDContext 30 * @see UniqueGCFactoryBase 31 */ 32class ContextFactory : public UniqueGCFactoryBase<sys::fs::Path, LDContext, 0> 33{ 34public: 35 explicit ContextFactory(size_t pNum); 36 ~ContextFactory(); 37 38 LDContext* produce(); 39 LDContext* produce(const sys::fs::Path& pPath); 40}; 41 42} // namespace of mcld 43 44#endif 45 46