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    1: /* mmc.h - header file for mmap cache package
    2: **
    3: ** Copyright © 1998 by Jef Poskanzer <jef@mail.acme.com>.
    4: ** All rights reserved.
    5: **
    6: ** Redistribution and use in source and binary forms, with or without
    7: ** modification, are permitted provided that the following conditions
    8: ** are met:
    9: ** 1. Redistributions of source code must retain the above copyright
   10: **    notice, this list of conditions and the following disclaimer.
   11: ** 2. Redistributions in binary form must reproduce the above copyright
   12: **    notice, this list of conditions and the following disclaimer in the
   13: **    documentation and/or other materials provided with the distribution.
   14: **
   15: ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   16: ** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17: ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18: ** ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19: ** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20: ** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21: ** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22: ** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23: ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24: ** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25: ** SUCH DAMAGE.
   26: */
   27: 
   28: #ifndef _MMC_H_
   29: #define _MMC_H_
   30: 
   31: /* Returns an mmap()ed area for the given file, or (void*) 0 on errors.
   32: ** If you have a stat buffer on the file, pass it in, otherwise pass 0.
   33: ** Same for the current time.
   34: */
   35: extern void* mmc_map( char* filename, struct stat* sbP, struct timeval* nowP );
   36: 
   37: /* Done with an mmap()ed area that was returned by mmc_map().
   38: ** If you have a stat buffer on the file, pass it in, otherwise pass 0.
   39: ** Same for the current time.
   40: */
   41: extern void mmc_unmap( void* addr, struct stat* sbP, struct timeval* nowP );
   42: 
   43: /* Clean up the mmc package, freeing any unused storage.
   44: ** This should be called periodically, say every five minutes.
   45: ** If you have the current time, pass it in, otherwise pass 0.
   46: */
   47: extern void mmc_cleanup( struct timeval* nowP );
   48: 
   49: /* Free all storage, usually in preparation for exitting. */
   50: extern void mmc_destroy( void );
   51: 
   52: /* Generate debugging statistics syslog message. */
   53: extern void mmc_logstats( long secs );
   54: 
   55: #endif /* _MMC_H_ */