177 lines
6.2 KiB
C
177 lines
6.2 KiB
C
/*
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* This file lists the minimums for the limits set by each of
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* the POSIX features subsets.
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*
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* XXX: Careful attention needs to be paid to section 2.8 in 1003.1b-1993
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* to segregrate the variables below based on their "class" according
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* to our implementation. We also need to set the Run-Time Invariant
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* and other related values.
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*
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* $Id$
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*/
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#ifndef _GCC_LIMITS_H_ /* if we have not seen gcc's limits.h yet */
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#include_next <limits.h>
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#endif
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#include <sys/syslimits.h>
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#ifndef __POSIX_LIMITS_h
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#define __POSIX_LIMITS_h
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/****************************************************************************
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****************************************************************************
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* *
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* P1003.1b-1993 defines the constants below this comment. *
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* *
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****************************************************************************
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****************************************************************************/
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#define _POSIX_AIO_LISTIO_MAX 2
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#define _POSIX_AIO_MAX 1
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#define _POSIX_ARG_MAX 4096
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#define _POSIX_CHILD_MAX 6
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#define _POSIX_DELAYTIMER_MAX 32
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#define _POSIX_HOST_NAME_MAX 255
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#define _POSIX_LINK_MAX 8
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#define _POSIX_MAX_CANON 255
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#define _POSIX_MAX_INPUT 255
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#define _POSIX_MQ_OPEN_MAX 8
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#define _POSIX_MQ_PRIO_MAX 32
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#define _POSIX_NAME_MAX 255
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#define _POSIX_NGROUPS_MAX 0
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#define _POSIX_OPEN_MAX 16
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#define _POSIX_PATH_MAX 255
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#define _POSIX_PIPE_BUF 512
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/* The maximum number of repeated occurrences of a regular expression
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* * permitted when using the interval notation `\{M,N\}'. */
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#define _POSIX2_RE_DUP_MAX 255
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#define _POSIX_RTSIG_MAX 8
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#define _POSIX_SEM_NSEMS_MAX 256
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#define _POSIX_SEM_VALUE_MAX 32767
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#define _POSIX_SIGQUEUE_MAX 32
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#define _POSIX_SSIZE_MAX 32767
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#define _POSIX_STREAM_MAX 8
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#define _POSIX_TIMER_MAX 32
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#define _POSIX_TZNAME_MAX 3
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/*
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* Definitions of the following may be omitted if the value is >= stated
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* minimum but is indeterminate.
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*/
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#define AIO_LISTIO_MAX 2
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#define AIO_MAX 1
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#define AIO_PRIO_DELTA_MAX 0
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#define DELAYTIMER_MAX 32
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#define MQ_OPEN_MAX 8
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#define MQ_PRIO_MAX 32
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#define PAGESIZE (1<<12)
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#define RTSIG_MAX 8
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#define SEM_NSEMS_MAX 256
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#define SEM_VALUE_MAX INT_MAX
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#define SIGQUEUE_MAX 32
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#define STREAM_MAX 8
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#define TIMER_MAX 32
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#define TZNAME_MAX 3
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/*
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* Invariant values
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*/
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#ifdef __SIZE_MAX__
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#define SSIZE_MAX (__SIZE_MAX__ >> 1)
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#elif defined(__SIZEOF_SIZE_T__) && defined(__CHAR_BIT__)
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#define SSIZE_MAX ((1UL << (__SIZEOF_SIZE_T__ * __CHAR_BIT__ - 1)) - 1)
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#else /* historic fallback, wrong in most cases */
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#define SSIZE_MAX 32767
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#endif
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/*
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* Maximum Values
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*/
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#define _POSIX_CLOCKRES_MIN 0 /* in nanoseconds */
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/****************************************************************************
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****************************************************************************
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* *
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* P1003.1c/D10 defines the constants below this comment. *
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*
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* XXX: doc seems to have printing problems in this table :(
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* *
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****************************************************************************
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****************************************************************************/
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#define _POSIX_LOGIN_NAME_MAX 9
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#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
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#define _POSIX_THREAD_KEYS_MAX 28
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#define _POSIX_THREAD_THREADS_MAX 64
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#define _POSIX_TTY_NAME_MAX 9
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/*
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* Definitions of the following may be omitted if the value is >= stated
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* minimum but is indeterminate.
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*
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* NOTE: LOGIN_NAME_MAX is named LOGNAME_MAX under Solaris 2.x. Perhaps
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* the draft specification will be changing. jrs 05/24/96
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*/
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#define LOGIN_NAME_MAX _POSIX_LOGIN_NAME_MAX
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#define TTY_NAME_MAX _POSIX_TTY_NAME_MAX
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#define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS
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/*
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* RTEMS is smart enough to give us the minimum stack size if we ask
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* for too little. Because the real RTEMS limit for this is cpu dependent
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* AND rtems header files are not installed yet, we cannot use the cpu
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* dependent constant CPU_STACK_MINIMUM_SIZE. Moreover, we do not want
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* to duplicate that information here so we will just let RTEMS magically
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* give us its minimum stack size.
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*
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* NOTE: The other alternative is to have this be a macro for a
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* routine in RTEMS which returns the constant.
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*/
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#define PTHREAD_STACK_MIN 0
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/*
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* The maximum number of keys (PTHREAD_KEYS_MAX) and threads
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* (PTHREAD_THREADS_MAX) are configurable and may exceed the minimum.
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*
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#define PTHREAD_KEYS_MAX _POSIX_THREAD_KEYS_MAX
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#define PTHREAD_THREADS_MAX _POSIX_THREAD_THREADS_MAX
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*/
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/****************************************************************************
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****************************************************************************
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* *
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* P1003.4b/D8 defines the constants below this comment. *
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* *
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****************************************************************************
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****************************************************************************/
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#define _POSIX_INTERRUPT_OVERRUN_MAX 32
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/*
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* Definitions of the following may be omitted if the value is >= stated
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* minimum but is indeterminate.
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*/
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#define INTERRUPT_OVERRUN_MAX 32
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/*
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* Pathname Variables
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*/
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#define MIN_ALLOC_SIZE
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#define REC_MIN_XFER_SIZE
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#define REC_MAX_XFER_SIZE
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#define REC_INCR_XFER_SIZE
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#define REC_XFER_ALIGN
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#define MAX_ATOMIC_SIZE
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#endif
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/* end of include file */
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