15460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao//===- ContextFactory.h ---------------------------------------------------===// 25460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// 35460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// The MCLinker Project 45460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// 55460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// This file is distributed under the University of Illinois Open Source 65460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// License. See LICENSE.TXT for details. 75460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao// 85460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao//===----------------------------------------------------------------------===// 937b74a387bb3993387029859c2d9d051c41c724eStephen Hines#ifndef MCLD_MC_CONTEXTFACTORY_H_ 1037b74a387bb3993387029859c2d9d051c41c724eStephen Hines#define MCLD_MC_CONTEXTFACTORY_H_ 115460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 1237b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/LD/LDContext.h" 1337b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/Support/UniqueGCFactory.h" 1437b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/Support/Path.h" 155460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 1637b74a387bb3993387029859c2d9d051c41c724eStephen Hinesnamespace mcld { 175460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao/** \class ContextFactory 185460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * \brief ContextFactory avoids the duplicated LDContext of the same file. 195460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * 205460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * MCLinker is designed for efficient memory usage. Because user can give 215460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * MCLinker the same input file many times on the command line, MCLinker must 225460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * avoid opening identical file twice. 235460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * 245460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * ContextFactory is the guard to prevent redundant opening. MCLinker does not 255460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * create LDContext directly. Instead, it creates LDContext by ContextFactory. 265460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * ContextFactory returns the identical reference of LDContext if it's openend. 275460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * 285460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * @see LDContext 295460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao * @see UniqueGCFactoryBase 305460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao */ 3137b74a387bb3993387029859c2d9d051c41c724eStephen Hinesclass ContextFactory : public UniqueGCFactoryBase<sys::fs::Path, LDContext, 0> { 3237b74a387bb3993387029859c2d9d051c41c724eStephen Hines public: 335460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao explicit ContextFactory(size_t pNum); 345460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao ~ContextFactory(); 355460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 36affc150dc44fab1911775a49636d0ce85333b634Zonr Chang LDContext* produce(); 375460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao LDContext* produce(const sys::fs::Path& pPath); 3837b74a387bb3993387029859c2d9d051c41c724eStephen Hines LDContext* produce(const char* pPath); 395460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao}; 405460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 4137b74a387bb3993387029859c2d9d051c41c724eStephen Hines} // namespace mcld 425460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 4337b74a387bb3993387029859c2d9d051c41c724eStephen Hines#endif // MCLD_MC_CONTEXTFACTORY_H_ 44