Return to flock.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / php / win32

Annotation of embedaddon/php/win32/flock.c, revision 1.1.1.1

1.1       misho       1: /*
                      2:  * Program:   Unix compatibility routines
                      3:  *
                      4:  * Author:  Mark Crispin
                      5:  *      Networks and Distributed Computing
                      6:  *      Computing & Communications
                      7:  *      University of Washington
                      8:  *      Administration Building, AG-44
                      9:  *      Seattle, WA  98195
                     10:  *      Internet: MRC@CAC.Washington.EDU
                     11:  *
                     12:  * Date:    14 September 1996
                     13:  * Last Edited: 14 August 1997
                     14:  *
                     15:  * Copyright 1997 by the University of Washington
                     16:  *
                     17:  *  Permission to use, copy, modify, and distribute this software and its
                     18:  * documentation for any purpose and without fee is hereby granted, provided
                     19:  * that the above copyright notice appears in all copies and that both the
                     20:  * above copyright notice and this permission notice appear in supporting
                     21:  * documentation, and that the name of the University of Washington not be
                     22:  * used in advertising or publicity pertaining to distribution of the software
                     23:  * without specific, written prior permission.  This software is made available
                     24:  * "as is", and
                     25:  * THE UNIVERSITY OF WASHINGTON DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED,
                     26:  * WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT LIMITATION ALL IMPLIED
                     27:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND IN
                     28:  * NO EVENT SHALL THE UNIVERSITY OF WASHINGTON BE LIABLE FOR ANY SPECIAL,
                     29:  * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
                     30:  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, TORT
                     31:  * (INCLUDING NEGLIGENCE) OR STRICT LIABILITY, ARISING OUT OF OR IN CONNECTION
                     32:  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
                     33:  *
                     34:  */
                     35: 
                     36: 
                     37: /*              DEDICATION
                     38: 
                     39:  *  This file is dedicated to my dog, Unix, also known as Yun-chan and
                     40:  * Unix J. Terwilliker Jehosophat Aloysius Monstrosity Animal Beast.  Unix
                     41:  * passed away at the age of 11 1/2 on September 14, 1996, 12:18 PM PDT, after
                     42:  * a two-month bout with cirrhosis of the liver.
                     43:  *
                     44:  *  He was a dear friend, and I miss him terribly.
                     45:  *
                     46:  *  Lift a leg, Yunie.  Luv ya forever!!!!
                     47:  */
                     48: 
                     49: #include "php.h"
                     50: #include <windows.h>
                     51: #include <io.h>
                     52: #include <errno.h>
                     53: #include "flock.h"
                     54: 
                     55: PHPAPI int flock(int fd, int op)
                     56: {
                     57:        HANDLE hdl = (HANDLE) _get_osfhandle(fd);
                     58:        DWORD low = 1, high = 0;
                     59:        OVERLAPPED offset =
                     60:        {0, 0, 0, 0, NULL};
                     61:        if (hdl < 0)
                     62:                return -1;                              /* error in file descriptor */
                     63:        /* bug for bug compatible with Unix */
                     64:        UnlockFileEx(hdl, 0, low, high, &offset);
                     65:        switch (op & ~LOCK_NB) {        /* translate to LockFileEx() op */
                     66:                case LOCK_EX:                   /* exclusive */
                     67:                        if (LockFileEx(hdl, LOCKFILE_EXCLUSIVE_LOCK +
                     68:                                                ((op & LOCK_NB) ? LOCKFILE_FAIL_IMMEDIATELY : 0),
                     69:                                                   0, low, high, &offset))
                     70:                                return 0;
                     71:                        break;
                     72:                case LOCK_SH:                   /* shared */
                     73:                        if (LockFileEx(hdl, ((op & LOCK_NB) ? LOCKFILE_FAIL_IMMEDIATELY : 0),
                     74:                                                   0, low, high, &offset))
                     75:                                return 0;
                     76:                        break;
                     77:                case LOCK_UN:                   /* unlock */
                     78:                        return 0;                       /* always succeeds */
                     79:                default:                                /* default */
                     80:                        break;
                     81:        }
                     82:        errno = EINVAL;                         /* bad call */
                     83:        return -1;
                     84: }