52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
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//===- MemoryArea.h -------------------------------------------------------===//
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//
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// The MCLinker Project
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MCLD_SUPPORT_MEMORYAREA_H_
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#define MCLD_SUPPORT_MEMORYAREA_H_
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#include "mcld/Support/Compiler.h"
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#include <llvm/ADT/StringRef.h>
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#include <llvm/Support/MemoryBuffer.h>
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namespace mcld {
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/** \class MemoryArea
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* \brief MemoryArea is used to manage input read-only memory space.
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*/
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class MemoryArea {
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friend class MemoryAreaFactory;
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public:
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// constructor by file handler.
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// If the given file handler is read-only, client can not request a region
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// that out of the file size.
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// @param pFileHandle - file handler
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explicit MemoryArea(llvm::StringRef pFilename);
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explicit MemoryArea(const char* pMemBuffer, size_t pSize);
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// request - create a MemoryRegion within a sufficient space
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// find an existing space to hold the MemoryRegion.
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// if MemoryArea does not find such space, then it creates a new space and
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// assign a MemoryRegion into the space.
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llvm::StringRef request(size_t pOffset, size_t pLength);
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size_t size() const;
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private:
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std::unique_ptr<llvm::MemoryBuffer> m_pMemoryBuffer;
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private:
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DISALLOW_COPY_AND_ASSIGN(MemoryArea);
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};
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} // namespace mcld
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#endif // MCLD_SUPPORT_MEMORYAREA_H_
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