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Implemented fast file allocation in MinGW32 build. 

We use SetFilePointerEx and SetEndOfFile to allocate extents.  This
only works with NTFS. To enable this feature, --file-allocation=falloc
must be given.
pull/1/head
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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7
configure.ac
View File

@ -12,6 +12,7 @@ AC_CONFIG_HEADERS([config.h])
case "$target" in
*mingw*|*cygwin*)
win_build=yes
LIBS="-lws2_32 -lcrypto -lwsock32 -lgdi32 -lwinmm $LIBS"
;;
esac
@ -381,12 +382,14 @@ AM_CONDITIONAL([HAVE_EPOLL], [test "x$have_epoll" = "xyes"])
AC_CHECK_FUNCS([posix_fallocate],[have_posix_fallocate=yes])
ARIA2_CHECK_FALLOCATE
if test "x$have_posix_fallocate" = "xyes" ||
test "x$have_fallocate" = "xyes"; then
test "x$have_fallocate" = "xyes" ||
test "x$win_build" = "xyes"; then
AC_DEFINE([HAVE_SOME_FALLOCATE], [1],
[Define to 1 if *_fallocate is available.])
fi
AM_CONDITIONAL([HAVE_SOME_FALLOCATE],
[test "x$have_posix_fallocate" = "xyes" || test "x$have_fallocate" = "xyes"])
[test "x$have_posix_fallocate" = "xyes" || test "x$have_fallocate" = "xyes" \
|| test "x$win_build" = "xyes"])
AC_CHECK_FUNCS([asctime_r],

19
src/AbstractDiskWriter.cc
View File

@ -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;