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* fhandler.h (fhandler_base::pread): Declare new function.

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(fhandler_base::pwrite): Ditto.
(fhandler_disk_file::pread): Ditto.
(fhandler_disk_file::pwrite): Ditto.
* fhandler.cc (fhandler_base::pread): Define new function.
(fhandler_base::pwrite): Ditto.
* fhandler_disk_file.cc (fhandler_base::pread): Ditto.
(fhandler_base::pwrite): Ditto.
* syscalls.cc (pread): Define new function.
(pwrite): Ditto.
* cygwin.din: Export pread, pwrite.
* include/sys/ioctl.h: Guard some _IO* declarations to avoid conflict with
socket.h.
This commit is contained in:
Christopher Faylor
2005-07-29 17:04:46 +00:00
parent 728b9af5c9
commit 7d7d09aee8
8 changed files with 128 additions and 25 deletions
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24
winsup/cygwin/fhandler_disk_file.cc
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@ -984,6 +984,30 @@ fhandler_base::close_fs ()
return res;
}
ssize_t __stdcall
fhandler_disk_file::pread (void *buf, size_t count, _off64_t offset)
{
ssize_t res = lseek (offset, SEEK_SET);
if (res >= 0)
{
size_t tmp_count = count;
read (buf, tmp_count);
res = (ssize_t) tmp_count;
}
debug_printf ("%d = pread (%p, %d, %d)\n", res, buf, count, offset);
return res;
}
ssize_t __stdcall
fhandler_disk_file::pwrite (void *buf, size_t count, _off64_t offset)
{
ssize_t res = lseek (offset, SEEK_SET);
if (res >= 0)
res = write (buf, count);
debug_printf ("%d = pwrite (%p, %d, %d)\n", res, buf, count, offset);
return res;
}
/* FIXME: The correct way to do this to get POSIX locking semantics is to
keep a linked list of posix lock requests and map them into Win32 locks.
he problem is that Win32 does not deal correctly with overlapping lock