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New class: MemoryMappedFile.

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This commit is contained in:
Julian Storer 2011-05-12 21:28:05 +01:00
parent 981ef9313c
commit 3213bec481
23 changed files with 556 additions and 66 deletions
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41
src/native/common/juce_posix_SharedCode.h
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@ -523,6 +523,47 @@ void FileOutputStream::flushInternal()
status = getResultForErrno();
}
//==============================================================================
MemoryMappedFile::MemoryMappedFile (const File& file, MemoryMappedFile::AccessMode mode)
: address (nullptr),
internal (nullptr),
length (0)
{
jassert (mode == readOnly || mode == readWrite);
const int fd = open (file.getFullPathName().toUTF8(),
mode == readWrite ? (O_CREAT + O_RDWR) : O_RDONLY, 00644);
internal = reinterpret_cast<void*> (fd);
if (fd != -1)
{
const int64 fileSize = file.getSize();
address = mmap (0, (size_t) fileSize,
mode == readWrite ? (PROT_READ | PROT_WRITE) : PROT_READ,
MAP_SHARED, fd, 0);
if (address == MAP_FAILED)
address = nullptr;
else
length = (size_t) fileSize;
}
}
MemoryMappedFile::~MemoryMappedFile()
{
const int fd = reinterpret_cast <int> (internal);
if (fd != 0)
{
if (address != nullptr)
munmap (address, length);
close (fd);
}
}
//==============================================================================
const File juce_getExecutableFile()
{