[svn] * src/lock.h,src/lock.c,src/noffle.c: Add lazy lock release. Only release the lock and close the databases if (a) another process signals us SIGUSR1 indicating it wants the lock, or (b) it is explicitly requested by a call to new function Lock_syncDatabases(). When waiting for the lock, SIGUSR1 the holding process every second. This is all an attempt to minimise the number of times we need to close and open the database. When (ha!) the database is replaced by something that can handle multiple simultaneous writers (with appropriate locking) this won't be necessary.

/*
  common.h

  Common declarations.

  $Id: common.h 51 2000-05-05 23:49:38Z uh1763 $
*/

#ifndef COMMON_H
#define COMMON_H

#if HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define FALSE 0
#define TRUE !0
#define MAXCHAR 2048

#ifdef DEBUG
#include <assert.h>
#define ASSERT( x ) \
    if ( ! ( x ) ) \
        Log_err( "ASSERTION FAILED: %s line %i", __FILE__, __LINE__ ); \
    assert( x )
#else
#define ASSERT( x )
#endif

typedef int Bool;
typedef char Str[ MAXCHAR ];

#endif