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// -*- C++ -*-
//=============================================================================
/**
* @file os_limits.h
*
* implementation-defined constants
*
* $Id$
*
* @author Don Hinton <dhinton@dresystems.com>
* @author This code was originally in various places including ace/OS.h.
*/
//=============================================================================
#ifndef ACE_OS_INCLUDE_OS_LIMITS_H
#define ACE_OS_INCLUDE_OS_LIMITS_H
#include /**/ "ace/pre.h"
#include "ace/config-all.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "ace/os_include/os_unistd.h"
#include "ace/os_include/os_stdio.h" // for FILENAME_MAX on Windows
#if !defined (ACE_LACKS_LIMITS_H)
# include /**/ <limits.h>
#endif /* !ACE_LACKS_LIMITS_H */
#if !defined (ACE_LACKS_PARAM_H)
# include /**/ <sys/param.h>
#endif /* ACE_LACKS_PARAM_H */
// Place all additions (especially function declarations) within extern "C" {}
#ifdef __cplusplus
extern "C"
{
#endif /* __cplusplus */
#if ! defined (howmany)
# define howmany(x, y) (((x)+((y)-1))/(y))
#endif /* howmany */
#if !defined (NAME_MAX)
# if defined (MAXNAMLEN)
# define NAME_MAX MAXNAMLEN
# elif defined (MAXNAMELEN)
# define NAME_MAX MAXNAMELEN
# elif defined (FILENAME_MAX)
# define NAME_MAX FILENAME_MAX
# elif defined (_MAX_FNAME)
# define NAME_MAX _MAX_FNAME
# else /* _MAX_FNAME */
# define NAME_MAX 256
# endif /* MAXNAMLEN */
#endif /* !NAME_MAX */
#if !defined (MAXNAMELEN)
# define MAXNAMELEN NAME_MAX
#endif /* MAXNAMELEN */
#if !defined (HOST_NAME_MAX)
# define HOST_NAME_MAX 256
#endif /* !HOST_NAME_MAX */
// Note that we are using PATH_MAX instead of _POSIX_PATH_MAX, since
// _POSIX_PATH_MAX is the *minimun* maximum value for PATH_MAX and is
// defined by POSIX as 256.
#if !defined (PATH_MAX)
# if defined (_MAX_PATH)
# define PATH_MAX _MAX_PATH
# elif defined (MAX_PATH)
# define PATH_MAX MAX_PATH
# else /* !_MAX_PATH */
# define PATH_MAX 1024
# endif /* _MAX_PATH */
#endif /* !PATH_MAX */
// Leaving this for backward compatibility, but PATH_MAX should always be
// used directly.
#if !defined (MAXPATHLEN)
# define MAXPATHLEN PATH_MAX
#endif /* !MAXPATHLEN */
// This is defined by XOPEN to be a minimum of 16. POSIX.1g
// also defines this value. platform-specific config.h can
// override this if need be.
#if !defined (IOV_MAX)
# define IOV_MAX 16
#endif /* IOV_MAX */
#if !defined (ACE_IOV_MAX)
# define ACE_IOV_MAX IOV_MAX
#endif /* ACE_IOV_MAX */
#if !defined (PIPE_BUF)
# define PIPE_BUF 5120
#endif /* PIPE_BUF */
#if defined (ACE_HAS_POSIX_REALTIME_SIGNALS)
// = Giving unique ACE scoped names for some important
// RTSignal-Related constants. Becuase sometimes, different
// platforms use different names for these constants.
// Number of realtime signals provided in the system.
// _POSIX_RTSIG_MAX is the upper limit on the number of real time
// signals supported in a posix-4 compliant system.
# if defined (_POSIX_RTSIG_MAX)
# define ACE_RTSIG_MAX _POSIX_RTSIG_MAX
# else /* not _POSIX_RTSIG_MAX */
// POSIX-4 compilant system has to provide atleast 8 RT signals.
// @@ Make sure the platform does *not* define this constant with
// some other name. If yes, use that instead of 8.
# define ACE_RTSIG_MAX 8
# endif /* _POSIX_RTSIG_MAX */
#endif /* ACE_HAS_POSIX_REALTIME_SIGNALS */
// The maximum number of concurrent timers per process.
# if !defined (_POSIX_TIMER_MAX)
# define _POSIX_TIMER_MAX 44
# endif /* _POSIX_TIMER_MAX */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#include /**/ "ace/post.h"
#endif /* ACE_OS_INCLUDE_OS_LIMITS_H */
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