1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/osdep/unix/flockcyg.h	Mon Sep 14 15:17:45 2009 +0900
     1.3 @@ -0,0 +1,50 @@
     1.4 +/* ========================================================================
     1.5 + * Copyright 1988-2006 University of Washington
     1.6 + *
     1.7 + * Licensed under the Apache License, Version 2.0 (the "License");
     1.8 + * you may not use this file except in compliance with the License.
     1.9 + * You may obtain a copy of the License at
    1.10 + *
    1.11 + *     http://www.apache.org/licenses/LICENSE-2.0
    1.12 + *
    1.13 + * 
    1.14 + * ========================================================================
    1.15 + */
    1.16 +
    1.17 +/*
    1.18 + * Program:	flock() emulation via fcntl() locking
    1.19 + *
    1.20 + * Author:	Mark Crispin
    1.21 + *		Networks and Distributed Computing
    1.22 + *		Computing & Communications
    1.23 + *		University of Washington
    1.24 + *		Administration Building, AG-44
    1.25 + *		Seattle, WA  98195
    1.26 + *		Internet: MRC@CAC.Washington.EDU
    1.27 + *
    1.28 + * Date:	10 April 2001
    1.29 + * Last Edited:	30 August 2006
    1.30 + */
    1.31 +
    1.32 +/* Cygwin does not seem to have the design flaw in fcntl() locking that
    1.33 + * most other systems do (see flocksim.c for details).  If some cretin
    1.34 + * decides to implement that design flaw, then Cygwin will have to use
    1.35 + * flocksim.  Also, we don't test NFS either
    1.36 + */
    1.37 +
    1.38 +
    1.39 +#define flock flocksim		/* use ours instead of theirs */
    1.40 +
    1.41 +#undef LOCK_SH
    1.42 +#define LOCK_SH 1		/* shared lock */
    1.43 +#undef LOCK_EX
    1.44 +#define LOCK_EX 2		/* exclusive lock */
    1.45 +#undef LOCK_NB
    1.46 +#define LOCK_NB 4		/* no blocking */
    1.47 +#undef LOCK_UN
    1.48 +#define LOCK_UN 8		/* unlock */
    1.49 +
    1.50 +
    1.51 +/* Function prototypes */
    1.52 +
    1.53 +int flocksim (int fd,int operation);