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Implemented fast file allocation in MinGW32 build.

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We use SetFilePointerEx and SetEndOfFile to allocate extents.  This
only works with NTFS. To enable this feature, --file-allocation=falloc
must be given.
This commit is contained in:
Tatsuhiro Tsujikawa 2011-06-07 01:09:38 +09:00
parent 867cab6df1
commit e958f5dab3
2 changed files with 23 additions and 3 deletions
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19
src/AbstractDiskWriter.cc
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@ -233,7 +233,24 @@ void AbstractDiskWriter::allocate(off_t offset, uint64_t length)
if(fd_ == -1) {
throw DL_ABORT_EX("File not yet opened.");
}
# ifdef HAVE_FALLOCATE
# ifdef __MINGW32__
LARGE_INTEGER fileLength;
fileLength.QuadPart = offset+length;
HANDLE handle = LongToHandle(_get_osfhandle(fd_));
int r;
r = SetFilePointerEx(handle, fileLength, 0, FILE_BEGIN);
if(r == 0) {
throw DL_ABORT_EX2(fmt("SetFilePointerEx failed. cause: %lx",
GetLastError()),
error_code::FILE_IO_ERROR);
}
r = SetEndOfFile(handle);
if(r == 0) {
throw DL_ABORT_EX2(fmt("SetEndOfFile failed. cause: %lx",
GetLastError()),
error_code::FILE_IO_ERROR);
}
# elif HAVE_FALLOCATE
// For linux, we use fallocate to detect file system supports
// fallocate or not.
int r;