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view src/portable.h @ 165:8ea6b5ddc5a5 noffle

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[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.
author bears
date Thu, 25 Jan 2001 13:38:31 +0000
parents c7df2cc65cc1
children
line wrap: on
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/*
  portable.h

  Compatibility checks and fallback-functions.

  $Id: portable.h 80 2000-05-13 15:36:35Z bears $
*/

#ifndef PORTABLE_H
#define PORTABLE_H    /* To stop multiple inclusions. */


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

#if !defined(HAVE_VSNPRINTF) && defined(HAVE___VSNPRINTF)
#undef vsnprintf
#define vsnprintf __vsnprintf
#define HAVE_VSNPRINTF
#endif

/* This is *not* good, because vsprintf() doesn't do any bounds-checking */
#if !defined(HAVE_VSNPRINTF) && !defined(HAVE___VSNPRINTF)
#define vsnprintf(c, len, fmt, args) vsprintf(c, fmt, args)
#define HAVE_VSNPRINTF
#endif

#if !defined(HAVE_SNPRINTF) && defined(HAVE___SNPRINTF)
#undef snprintf
#define snprintf __snprintf
#define HAVE_SNPRINTF
#endif

/* Indicate deliberately unused argument. Possibly compiler specific. */
#define	UNUSED(x)	{ ( void ) x; }

#endif