newlib/libc/sys/rtems/include/limits.h

   1 /*
   2  *  This file lists the minimums for the limits set by each of
   3  *  the POSIX features subsets.
   4  *
   5  *  XXX: Careful attention needs to be paid to section 2.8 in 1003.1b-1993
   6  *       to segregrate the variables below based on their "class" according
   7  *       to our implementation.  We also need to set the Run-Time Invariant
   8  *       and other related values.
   9  *
  10  *  $Id$
  11  */
  12
  13 #ifndef _GCC_LIMITS_H_  /* if we have not seen gcc's limits.h yet */
  14 #include_next <limits.h>
  15 #endif
  16
  17 #include <sys/syslimits.h>
  18
  19 #ifndef __POSIX_LIMITS_h
  20 #define __POSIX_LIMITS_h
  21
  22 /****************************************************************************
  23  ****************************************************************************
  24  *                                                                          *
  25  *         P1003.1b-1993 defines the constants below this comment.          *
  26  *                                                                          *
  27  ****************************************************************************
  28  ****************************************************************************/
  29
  30 #define _POSIX_AIO_LISTIO_MAX   2
  31 #define _POSIX_AIO_MAX          1
  32 #define _POSIX_ARG_MAX          4096
  33 #define _POSIX_CHILD_MAX        6
  34 #define _POSIX_DELAYTIMER_MAX   32
  35 #define _POSIX_HOST_NAME_MAX    255
  36 #define _POSIX_LINK_MAX         8
  37 #define _POSIX_MAX_CANON        255
  38 #define _POSIX_MAX_INPUT        255
  39 #define _POSIX_MQ_OPEN_MAX      8
  40 #define _POSIX_MQ_PRIO_MAX      32
  41 #define _POSIX_NAME_MAX         255
  42 #define _POSIX_NGROUPS_MAX      0
  43 #define _POSIX_OPEN_MAX         16
  44 #define _POSIX_PATH_MAX         255
  45 #define _POSIX_PIPE_BUF         512
  46 /* The maximum number of repeated occurrences of a regular expression
  47  *  *    permitted when using the interval notation `\{M,N\}'.  */
  48 #define _POSIX2_RE_DUP_MAX              255
  49 #define _POSIX_RTSIG_MAX        8
  50 #define _POSIX_SEM_NSEMS_MAX    256
  51 #define _POSIX_SEM_VALUE_MAX    32767
  52 #define _POSIX_SIGQUEUE_MAX     32
  53 #define _POSIX_SSIZE_MAX        32767
  54 #define _POSIX_STREAM_MAX       8
  55 #define _POSIX_TIMER_MAX        32
  56 #define _POSIX_TZNAME_MAX       3
  57
  58 /*
  59  *  Definitions of the following may be omitted if the value is >= stated
  60  *  minimum but is indeterminate.
  61  */
  62
  63 #define AIO_LISTIO_MAX          2
  64 #define AIO_MAX                 1
  65 #define AIO_PRIO_DELTA_MAX      0
  66 #define DELAYTIMER_MAX          32
  67 #define MQ_OPEN_MAX             8
  68 #define MQ_PRIO_MAX             32
  69 #define PAGESIZE                (1<<12)
  70 #define RTSIG_MAX               8
  71 #define SEM_NSEMS_MAX           256
  72 #define SEM_VALUE_MAX           INT_MAX
  73 #define SIGQUEUE_MAX            32
  74 #define STREAM_MAX              8
  75 #define TIMER_MAX               32
  76 #define TZNAME_MAX              3
  77
  78 /*
  79  *  Invariant values
  80  */
  81
  82 #ifdef __SIZE_MAX__
  83 #define SSIZE_MAX               (__SIZE_MAX__ >> 1)
  84 #elif defined(__SIZEOF_SIZE_T__) && defined(__CHAR_BIT__)
  85 #define SSIZE_MAX               ((1UL << (__SIZEOF_SIZE_T__ * __CHAR_BIT__ - 1)) - 1)
  86 #else /* historic fallback, wrong in most cases */
  87 #define SSIZE_MAX               32767
  88 #endif
  89
  90 /*
  91  *  Maximum Values
  92  */
  93
  94 #define _POSIX_CLOCKRES_MIN      0   /* in nanoseconds */
  95
  96 /****************************************************************************
  97  ****************************************************************************
  98  *                                                                          *
  99  *         P1003.1c/D10 defines the constants below this comment.           *
 100  *
 101  *  XXX: doc seems to have printing problems in this table :(
 102  *                                                                          *
 103  ****************************************************************************
 104  ****************************************************************************/
 105
 106 #define _POSIX_LOGIN_NAME_MAX                9
 107 #define _POSIX_THREAD_DESTRUCTOR_ITERATIONS  4
 108 #define _POSIX_THREAD_KEYS_MAX               28
 109 #define _POSIX_THREAD_THREADS_MAX            64
 110 #define _POSIX_TTY_NAME_MAX                  9
 111
 112 /*
 113  *  Definitions of the following may be omitted if the value is >= stated
 114  *  minimum but is indeterminate.
 115  *
 116  *  NOTE:  LOGIN_NAME_MAX is named LOGNAME_MAX under Solaris 2.x.  Perhaps
 117  *         the draft specification will be changing.  jrs 05/24/96
 118  */
 119
 120 #define LOGIN_NAME_MAX                      _POSIX_LOGIN_NAME_MAX
 121 #define TTY_NAME_MAX                        _POSIX_TTY_NAME_MAX
 122 #define PTHREAD_DESTRUCTOR_ITERATIONS       _POSIX_THREAD_DESTRUCTOR_ITERATIONS
 123
 124 /*
 125  *  RTEMS is smart enough to give us the minimum stack size if we ask
 126  *  for too little.  Because the real RTEMS limit for this is cpu dependent
 127  *  AND rtems header files are not installed yet, we cannot use the cpu
 128  *  dependent constant CPU_STACK_MINIMUM_SIZE.  Moreover, we do not want
 129  *  to duplicate that information here so we will just let RTEMS magically
 130  *  give us its minimum stack size.
 131  *
 132  *  NOTE:  The other alternative is to have this be a macro for a
 133  *         routine in RTEMS which returns the constant.
 134  */
 135
 136 #define PTHREAD_STACK_MIN                   0
 137
 138 /*
 139  *  The maximum number of keys (PTHREAD_KEYS_MAX) and threads
 140  *  (PTHREAD_THREADS_MAX) are configurable and may exceed the minimum.
 141  *
 142 #define PTHREAD_KEYS_MAX                    _POSIX_THREAD_KEYS_MAX
 143 #define PTHREAD_THREADS_MAX                 _POSIX_THREAD_THREADS_MAX
 144 */
 145
 146
 147 /****************************************************************************
 148  ****************************************************************************
 149  *                                                                          *
 150  *         P1003.4b/D8 defines the constants below this comment.            *
 151  *                                                                          *
 152  ****************************************************************************
 153  ****************************************************************************/
 154
 155 #define _POSIX_INTERRUPT_OVERRUN_MAX        32
 156
 157 /*
 158  *  Definitions of the following may be omitted if the value is >= stated
 159  *  minimum but is indeterminate.
 160  */
 161
 162 #define INTERRUPT_OVERRUN_MAX               32
 163
 164 /*
 165  *  Pathname Variables
 166  */
 167
 168 #define MIN_ALLOC_SIZE
 169 #define REC_MIN_XFER_SIZE
 170 #define REC_MAX_XFER_SIZE
 171 #define REC_INCR_XFER_SIZE
 172 #define REC_XFER_ALIGN
 173 #define MAX_ATOMIC_SIZE
 174
 175 #endif
 176 /* end of include file */