15460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao//===- MemoryArea.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_SUPPORT_MEMORYAREA_H_ 1037b74a387bb3993387029859c2d9d051c41c724eStephen Hines#define MCLD_SUPPORT_MEMORYAREA_H_ 115460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 1237b74a387bb3993387029859c2d9d051c41c724eStephen Hines#include "mcld/Support/Compiler.h" 13affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 1487f34658dec9097d987d254a990ea7f311bfc95fStephen Hines#include <llvm/ADT/StringRef.h> 1587f34658dec9097d987d254a990ea7f311bfc95fStephen Hines#include <llvm/Support/MemoryBuffer.h> 16affc150dc44fab1911775a49636d0ce85333b634Zonr Chang 1722add6ff3426df1a85089fe6a6e1597ee3b6f300Shih-wei Liaonamespace mcld { 185460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 195460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao/** \class MemoryArea 2087f34658dec9097d987d254a990ea7f311bfc95fStephen Hines * \brief MemoryArea is used to manage input read-only memory space. 215460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao */ 2237b74a387bb3993387029859c2d9d051c41c724eStephen Hinesclass MemoryArea { 2367e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao friend class MemoryAreaFactory; 2437b74a387bb3993387029859c2d9d051c41c724eStephen Hines 2537b74a387bb3993387029859c2d9d051c41c724eStephen Hines public: 2667e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao // constructor by file handler. 2767e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao // If the given file handler is read-only, client can not request a region 2867e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao // that out of the file size. 2967e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao // @param pFileHandle - file handler 3087f34658dec9097d987d254a990ea7f311bfc95fStephen Hines explicit MemoryArea(llvm::StringRef pFilename); 3167e37f1be98c926645219cfb47fab9e90d8c725cShih-wei Liao 3287f34658dec9097d987d254a990ea7f311bfc95fStephen Hines explicit MemoryArea(const char* pMemBuffer, size_t pSize); 335460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 345460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // request - create a MemoryRegion within a sufficient space 355460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // find an existing space to hold the MemoryRegion. 365460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // if MemoryArea does not find such space, then it creates a new space and 375460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao // assign a MemoryRegion into the space. 3887f34658dec9097d987d254a990ea7f311bfc95fStephen Hines llvm::StringRef request(size_t pOffset, size_t pLength); 395460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 4087f34658dec9097d987d254a990ea7f311bfc95fStephen Hines size_t size() const; 415460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 4237b74a387bb3993387029859c2d9d051c41c724eStephen Hines private: 43283d8cbf5b3a6888c70f7931a54da9256e13d357Stephen Hines std::unique_ptr<llvm::MemoryBuffer> m_pMemoryBuffer; 4437b74a387bb3993387029859c2d9d051c41c724eStephen Hines 4537b74a387bb3993387029859c2d9d051c41c724eStephen Hines private: 4637b74a387bb3993387029859c2d9d051c41c724eStephen Hines DISALLOW_COPY_AND_ASSIGN(MemoryArea); 475460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao}; 485460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 4937b74a387bb3993387029859c2d9d051c41c724eStephen Hines} // namespace mcld 505460a1f25d9ddecb5c70667267d66d51af177a99Shih-wei Liao 5137b74a387bb3993387029859c2d9d051c41c724eStephen Hines#endif // MCLD_SUPPORT_MEMORYAREA_H_ 52