1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/osdep/unix/flocksim.h	Mon Sep 14 15:17:45 2009 +0900
     1.3 @@ -0,0 +1,117 @@
     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:	20 December 2006
    1.30 + */
    1.31 +
    1.32 +
    1.33 +#include "dummy.h"		/* get scan_contents() prototype */
    1.34 +
    1.35 +#define flock flocksim		/* use ours instead of theirs */
    1.36 +
    1.37 +#undef LOCK_SH
    1.38 +#define LOCK_SH 1		/* shared lock */
    1.39 +#undef LOCK_EX
    1.40 +#define LOCK_EX 2		/* exclusive lock */
    1.41 +#undef LOCK_NB
    1.42 +#define LOCK_NB 4		/* no blocking */
    1.43 +#undef LOCK_UN
    1.44 +#define LOCK_UN 8		/* unlock */
    1.45 +
    1.46 +/* Safe locking definitions */
    1.47 +
    1.48 +extern int lockslavep;		/* non-zero means slave process */
    1.49 +
    1.50 +#undef SAFE_DELETE
    1.51 +#define SAFE_DELETE(dtb,stream,mbx) (dtb->flags & DR_LOCKING) ? \
    1.52 +  safe_delete (dtb,stream,mbx) : (*dtb->mbxdel) (stream,mbx)
    1.53 +#undef SAFE_RENAME
    1.54 +#define SAFE_RENAME(dtb,stream,old,newname) (dtb->flags & DR_LOCKING) ? \
    1.55 +  safe_rename (dtb,stream,old,newname) : (*dtb->mbxren) (stream,old,newname)
    1.56 +#undef SAFE_STATUS
    1.57 +#define SAFE_STATUS(dtb,stream,mbx,bits) (dtb->flags & DR_LOCKING) ? \
    1.58 +  safe_status (dtb,stream,mbx,bits) : (*dtb->status) (stream,mbx,bits)
    1.59 +#undef SAFE_SCAN_CONTENTS
    1.60 +#define SAFE_SCAN_CONTENTS(dtb,name,contents,csiz,fsiz) \
    1.61 +  (!dtb || (dtb->flags & DR_LOCKING)) ? \
    1.62 +   safe_scan_contents (dtb,name,contents,csiz,fsiz) : \
    1.63 +   scan_contents (dtb,name,contents,csiz,fsiz)
    1.64 +#undef SAFE_COPY
    1.65 +#define SAFE_COPY(dtb,stream,seq,mbx,bits) (dtb->flags & DR_LOCKING) ? \
    1.66 +  safe_copy (dtb,stream,seq,mbx,bits) : (*dtb->copy) (stream,seq,mbx,bits)
    1.67 +#undef SAFE_APPEND
    1.68 +#define SAFE_APPEND(dtb,stream,mbx,af,data) (dtb->flags & DR_LOCKING) ? \
    1.69 +  safe_append (dtb,stream,mbx,af,data) : (*dtb->append) (stream,mbx,af,data)
    1.70 +
    1.71 +#undef MM_EXISTS
    1.72 +#define MM_EXISTS (lockslavep ? slave_exists : mm_exists)
    1.73 +#undef MM_EXPUNGED
    1.74 +#define MM_EXPUNGED (lockslavep ? slave_expunged : mm_expunged)
    1.75 +#undef MM_FLAGS
    1.76 +#define MM_FLAGS (lockslavep ? slave_flags : mm_flags)
    1.77 +#undef MM_NOTIFY
    1.78 +#define MM_NOTIFY (lockslavep ? slave_notify : mm_notify)
    1.79 +#undef MM_STATUS
    1.80 +#define MM_STATUS (lockslavep ? slave_status : mm_status)
    1.81 +#undef MM_LOG
    1.82 +#define MM_LOG (lockslavep ? slave_log : mm_log)
    1.83 +#undef MM_CRITICAL
    1.84 +#define MM_CRITICAL (lockslavep ? slave_critical : mm_critical)
    1.85 +#undef MM_NOCRITICAL
    1.86 +#define MM_NOCRITICAL (lockslavep ? slave_nocritical : mm_nocritical)
    1.87 +#undef MM_DISKERROR
    1.88 +#define MM_DISKERROR (lockslavep ? slave_diskerror : mm_diskerror)
    1.89 +#undef MM_FATAL
    1.90 +#define MM_FATAL (lockslavep ? slave_fatal : mm_fatal)
    1.91 +#undef MM_APPEND
    1.92 +#define MM_APPEND(af) (lockslavep ? slave_append : (*af))
    1.93 +
    1.94 +/* Function prototypes */
    1.95 +
    1.96 +int flocksim (int fd,int operation);
    1.97 +
    1.98 +long safe_delete (DRIVER *dtb,MAILSTREAM *stream,char *mbx);
    1.99 +long safe_rename (DRIVER *dtb,MAILSTREAM *stream,char *old,char *newname);
   1.100 +long safe_status (DRIVER *dtb,MAILSTREAM *stream,char *mbx,long flags);
   1.101 +long safe_scan_contents (DRIVER *dtb,char *name,char *contents,
   1.102 +			 unsigned long csiz,unsigned long fsiz);
   1.103 +long safe_copy (DRIVER *dtb,MAILSTREAM *stream,char *seq,char *mbx,long flags);
   1.104 +long safe_append (DRIVER *dtb,MAILSTREAM *stream,char *mbx,append_t af,
   1.105 +		  void *data);
   1.106 +
   1.107 +void slave_exists (MAILSTREAM *stream,unsigned long number);
   1.108 +void slave_expunged (MAILSTREAM *stream,unsigned long number);
   1.109 +void slave_flags (MAILSTREAM *stream,unsigned long number);
   1.110 +void slave_notify (MAILSTREAM *stream,char *string,long errflg);
   1.111 +void slave_status (MAILSTREAM *stream,char *mailbox,MAILSTATUS *status);
   1.112 +void slave_log (char *string,long errflg);
   1.113 +void slave_critical (MAILSTREAM *stream);
   1.114 +void slave_nocritical (MAILSTREAM *stream);
   1.115 +long slave_diskerror (MAILSTREAM *stream,long errcode,long serious);
   1.116 +void slave_fatal (char *string);
   1.117 +long slave_append (MAILSTREAM *stream,void *data,char **flags,char **date,
   1.118 +		   STRING **message);
   1.119 +long slaveproxycopy (MAILSTREAM *stream,char *sequence,char *mailbox,
   1.120 +		     long options);