Am 13.02.2014 19:38, schrieb Zachary Turner:
> The only reason ReOpenFile is necessary at
> all is because some code somewhere is mixing read-styles against the same
> fd.
>
I don't understand...ReadFile with OVERLAPPED parameter doesn't modify the
HANDLE's file position, so you should be able to mix read()/pread() however you
like (as long as read() is only called from one thread).
I tried without ReOpenFile and it seems to work like a charm, or am I missing
something?
----8<----
ssize_t mingw_pread(int fd, void *buf, size_t count, off64_t offset)
{
DWORD bytes_read;
OVERLAPPED overlapped;
memset(&overlapped, 0, sizeof(overlapped));
overlapped.Offset = (DWORD) offset;
overlapped.OffsetHigh = (DWORD) (offset >> 32);
if (!ReadFile((HANDLE) _get_osfhandle(fd), buf, count, &bytes_read,
&overlapped)) {
errno = err_win_to_posix(GetLastError());
return -1;
}
return (ssize_t) bytes_read;
}
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