ContextFactory.h revision 87f34658dec9097d987d254a990ea7f311bfc95f 
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#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
19namespace 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 */
35class ContextFactory : public UniqueGCFactoryBase<sys::fs::Path, LDContext, 0>
36{
37public:
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