mirror of
https://github.com/php/php-src.git
synced 2024-11-24 18:34:21 +08:00
84 lines
2.8 KiB
C
84 lines
2.8 KiB
C
/*
|
|
* Program: Unix compatibility routines
|
|
*
|
|
* Author: Mark Crispin
|
|
* Networks and Distributed Computing
|
|
* Computing & Communications
|
|
* University of Washington
|
|
* Administration Building, AG-44
|
|
* Seattle, WA 98195
|
|
* Internet: MRC@CAC.Washington.EDU
|
|
*
|
|
* Date: 14 September 1996
|
|
* Last Edited: 14 August 1997
|
|
*
|
|
* Copyright 1997 by the University of Washington
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software and its
|
|
* documentation for any purpose and without fee is hereby granted, provided
|
|
* that the above copyright notice appears in all copies and that both the
|
|
* above copyright notice and this permission notice appear in supporting
|
|
* documentation, and that the name of the University of Washington not be
|
|
* used in advertising or publicity pertaining to distribution of the software
|
|
* without specific, written prior permission. This software is made available
|
|
* "as is", and
|
|
* THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
|
|
* WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
|
|
* NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
|
|
* INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
|
|
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
|
|
* (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
|
|
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
*/
|
|
|
|
|
|
/* DEDICATION
|
|
|
|
* This file is dedicated to my dog, Unix, also known as Yun-chan and
|
|
* Unix J. Terwilliker Jehosophat Aloysius Monstrosity Animal Beast. Unix
|
|
* passed away at the age of 11 1/2 on September 14, 1996, 12:18 PM PDT, after
|
|
* a two-month bout with cirrhosis of the liver.
|
|
*
|
|
* He was a dear friend, and I miss him terribly.
|
|
*
|
|
* Lift a leg, Yunie. Luv ya forever!!!!
|
|
*/
|
|
|
|
#include <windows.h>
|
|
#include <io.h>
|
|
#include <errno.h>
|
|
#include "flock.h"
|
|
|
|
int flock(int fd, int op)
|
|
{
|
|
HANDLE hdl = (HANDLE) _get_osfhandle(fd);
|
|
DWORD low = 1, high = 0;
|
|
OVERLAPPED offset =
|
|
{0, 0, 0, 0, NULL};
|
|
if (hdl < 0)
|
|
return -1; /* error in file descriptor */
|
|
/* bug for bug compatible with Unix */
|
|
UnlockFileEx(hdl, 0, low, high, &offset);
|
|
switch (op & ~LOCK_NB) { /* translate to LockFileEx() op */
|
|
case LOCK_EX: /* exclusive */
|
|
if (LockFileEx(hdl, LOCKFILE_EXCLUSIVE_LOCK +
|
|
((op & LOCK_NB) ? LOCKFILE_FAIL_IMMEDIATELY : 0),
|
|
0, low, high, &offset))
|
|
return 0;
|
|
break;
|
|
case LOCK_SH: /* shared */
|
|
if (LockFileEx(hdl, ((op & LOCK_NB) ? LOCKFILE_FAIL_IMMEDIATELY : 0),
|
|
0, low, high, &offset))
|
|
return 0;
|
|
break;
|
|
case LOCK_UN: /* unlock */
|
|
return 0; /* always succeeds */
|
|
default: /* default */
|
|
break;
|
|
}
|
|
errno = EINVAL; /* bad call */
|
|
return -1;
|
|
}
|