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juce_MemoryMappedFile.h
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2017 - ROLI Ltd.
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23 namespace juce
24{
25
26//==============================================================================
32 class JUCE_API MemoryMappedFile
33{
34 public:
36 enum AccessMode
37 {
38 readOnly,
39 readWrite
41 };
42
60 MemoryMappedFile (const File& file, AccessMode mode, bool exclusive = false);
61
78 MemoryMappedFile (const File& file,
79 const Range<int64>& fileRange,
80 AccessMode mode,
81 bool exclusive = false);
82
84 ~MemoryMappedFile();
85
89 void* getData() const noexcept { return address; }
90
94 size_t getSize() const noexcept { return (size_t) range.getLength(); }
95
97 Range<int64> getRange() const noexcept { return range; }
98
99 private:
100 //==============================================================================
101 void* address = nullptr;
102 Range<int64> range;
103
104 #if JUCE_WINDOWS
105 void* fileHandle = nullptr;
106 #else
107 int fileHandle = 0;
108 #endif
109
110 void openInternal (const File&, AccessMode, bool);
111
112 JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MemoryMappedFile)
113};
114
115} // namespace juce
juce::File
Definition: juce_File.h:41
juce::MemoryMappedFile
Definition: juce_MemoryMappedFile.h:33
juce::MemoryMappedFile::getRange
Range< int64 > getRange() const noexcept
Definition: juce_MemoryMappedFile.h:97
juce::MemoryMappedFile::~MemoryMappedFile
~MemoryMappedFile()
juce::MemoryMappedFile::getData
void * getData() const noexcept
Definition: juce_MemoryMappedFile.h:89
juce::MemoryMappedFile::getSize
size_t getSize() const noexcept
Definition: juce_MemoryMappedFile.h:94
juce::MemoryMappedFile::AccessMode
AccessMode
Definition: juce_MemoryMappedFile.h:37
juce::MemoryMappedFile::readOnly
@ readOnly
Definition: juce_MemoryMappedFile.h:38
juce::Range
Definition: juce_Range.h:40