536 lines
17 KiB
C
536 lines
17 KiB
C
/* limits.h
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _LIMITS_H___
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#include <features.h>
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#include <bits/wordsize.h>
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#ifndef _MACH_MACHLIMITS_H_
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/* _MACH_MACHLIMITS_H_ is used on OSF/1. */
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#define _LIMITS_H___
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#define _MACH_MACHLIMITS_H_
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/* Numerical limits */
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/* Number of bits in a `char'. */
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#undef CHAR_BIT
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#define CHAR_BIT __CHAR_BIT__
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#if __XSI_VISIBLE || __POSIX_VISIBLE >= 200809
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/* Number of bits in a `long'. */
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#undef LONG_BIT
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#define LONG_BIT (__SIZEOF_LONG__ * __CHAR_BIT__)
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/* Number of bits in a `int'. */
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#undef WORD_BIT
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#define WORD_BIT (__SIZEOF_INT__ * __CHAR_BIT__)
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#endif /* __XSI_VISIBLE || __POSIX_VISIBLE >= 200809 */
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/* Maximum length of a multibyte character. */
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#ifndef MB_LEN_MAX
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/* Use value from newlib. */
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#define MB_LEN_MAX 8
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#endif
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/* Minimum and maximum values a `signed char' can hold. */
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#undef SCHAR_MIN
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#define SCHAR_MIN (-128)
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#undef SCHAR_MAX
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#define SCHAR_MAX 127
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/* Maximum value an `unsigned char' can hold. (Minimum is 0). */
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#undef UCHAR_MAX
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#define UCHAR_MAX 255
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/* Minimum and maximum values a `char' can hold. */
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#ifdef __CHAR_UNSIGNED__
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#undef CHAR_MIN
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#define CHAR_MIN 0
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#undef CHAR_MAX
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#define CHAR_MAX 255
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#else
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#undef CHAR_MIN
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#define CHAR_MIN (-128)
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#undef CHAR_MAX
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#define CHAR_MAX 127
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#endif
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/* Minimum and maximum values a `signed short int' can hold. */
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#undef SHRT_MIN
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#define SHRT_MIN (-32768)
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#undef SHRT_MAX
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#define SHRT_MAX 32767
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/* Maximum value an `unsigned short int' can hold. (Minimum is 0). */
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#undef USHRT_MAX
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#define USHRT_MAX 65535
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/* Minimum and maximum values a `signed int' can hold. */
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#ifndef __INT_MAX__
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#define __INT_MAX__ 2147483647
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#endif
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#undef INT_MIN
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#define INT_MIN (-INT_MAX-1)
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#undef INT_MAX
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#define INT_MAX __INT_MAX__
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/* Maximum value an `unsigned int' can hold. (Minimum is 0). */
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#undef UINT_MAX
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#define UINT_MAX (INT_MAX * 2U + 1)
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/* Minimum and maximum values a `signed long int' can hold.
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(Same as `int'). */
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#ifndef __LONG_MAX__
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#if __WORDSIZE == 64
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#define __LONG_MAX__ 9223372036854775807L
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#else
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#define __LONG_MAX__ 2147483647L
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# endif /* __alpha__ */
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#endif
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#undef LONG_MIN
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#define LONG_MIN (-LONG_MAX-1L)
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#undef LONG_MAX
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#define LONG_MAX __LONG_MAX__
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/* Maximum value an `unsigned long int' can hold. (Minimum is 0). */
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#undef ULONG_MAX
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#define ULONG_MAX (LONG_MAX * 2UL + 1)
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/* Minimum and maximum values a `signed long long int' can hold. */
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#ifndef __LONG_LONG_MAX__
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#define __LONG_LONG_MAX__ 9223372036854775807LL
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#endif
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#if __GNU_VISIBLE
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#undef LONG_LONG_MIN
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#define LONG_LONG_MIN (-LONG_LONG_MAX-1)
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#undef LONG_LONG_MAX
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#define LONG_LONG_MAX __LONG_LONG_MAX__
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/* Maximum value an `unsigned long long int' can hold. (Minimum is 0). */
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#undef ULONG_LONG_MAX
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#define ULONG_LONG_MAX (LONG_LONG_MAX * 2ULL + 1)
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#endif
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#if __ISO_C_VISIBLE >= 1999
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/* Minimum and maximum values a `signed long long int' can hold. */
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#undef LLONG_MIN
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#define LLONG_MIN (-LLONG_MAX-1)
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#undef LLONG_MAX
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#define LLONG_MAX __LONG_LONG_MAX__
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/* Maximum value an `unsigned long long int' can hold. (Minimum is 0). */
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#undef ULLONG_MAX
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#define ULLONG_MAX (LLONG_MAX * 2ULL + 1)
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#endif /* __ISO_C_VISIBLE >= 1999 */
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/* Maximum size of ssize_t. Sadly, gcc doesn't give us __SSIZE_MAX__
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the way it does for __SIZE_MAX__. On the other hand, we happen to
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know that for Cygwin, ssize_t is 'int' on 32-bit and 'long' on
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64-bit, and this particular header is specific to Cygwin, so we
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don't have to jump through hoops. */
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#undef SSIZE_MAX
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#if __WORDSIZE == 64
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#define SSIZE_MAX (__LONG_MAX__)
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#else
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#define SSIZE_MAX (__INT_MAX__)
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#endif
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/* Runtime Invariant Values */
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/* Please note that symbolic names shall be ommited, on specific
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implementations where the corresponding value is equal to or greater
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than the stated minimum, but is unspecified. This indetermination
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might depend on the amount of available memory space on a specific
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instance of a specific implementation. The actual value supported by
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a specific instance shall be provided by the sysconf() function. */
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/* Maximum number of I/O operations in a single list I/O call supported by
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the implementation. Not yet implemented. */
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#undef AIO_LISTIO_MAX
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/* #define AIO_LISTIO_MAX >= _POSIX_AIO_LISTIO_MAX */
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/* Maximum number of outstanding asynchronous I/O operations supported by
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the implementation. Not yet implemented. */
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#undef AIO_MAX
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/* #define AIO_MAX >= _POSIX_AIO_MAX */
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/* The maximum amount by which a process can decrease its asynchronous I/O
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priority level from its own scheduling priority. */
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#undef AIO_PRIO_DELTA_MAX
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/* #define AIO_PRIO_DELTA_MAX >= 0 */
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/* Maximum number of bytes in arguments and environment passed in an exec
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call. 32000 is the safe value used for Windows processes when called
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from Cygwin processes. */
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#undef ARG_MAX
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#define ARG_MAX 32000
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#if __XSI_VISIBLE || __POSIX_VISIBLE >= 200809
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/* Maximum number of functions that may be registered with atexit(). */
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#undef ATEXIT_MAX
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#define ATEXIT_MAX 32
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#endif
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/* Maximum number of simultaneous processes per real user ID. */
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#undef CHILD_MAX
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#define CHILD_MAX 256
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/* Maximum number of timer expiration overruns. Not yet implemented. */
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#undef DELAYTIMER_MAX
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/* #define DELAYTIMER_MAX >= _POSIX_DELAYTIMER_MAX */
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/* Maximum length of a host name. */
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#undef HOST_NAME_MAX
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#define HOST_NAME_MAX 255
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#if __XSI_VISIBLE
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/* Maximum number of iovcnt in a writev (an arbitrary number) */
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#undef IOV_MAX
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#define IOV_MAX 1024
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#endif
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/* Maximum number of characters in a login name. */
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#undef LOGIN_NAME_MAX
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#define LOGIN_NAME_MAX 256 /* equal to UNLEN defined in w32api/lmcons.h */
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/* The maximum number of open message queue descriptors a process may hold. */
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#undef MQ_OPEN_MAX
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#define MQ_OPEN_MAX OPEN_MAX
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/* The maximum number of message priorities supported by the implementation. */
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#undef MQ_PRIO_MAX
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#define MQ_PRIO_MAX INT_MAX
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/* # of open files per process. Actually it can be more since Cygwin
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grows the dtable as necessary. We define a reasonable limit here
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which is returned by getdtablesize(), sysconf(_SC_OPEN_MAX) and
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getrlimit(RLIMIT_NOFILE). */
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#undef OPEN_MAX
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#define OPEN_MAX 256
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/* Size in bytes of a page. */
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#undef PAGESIZE
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#define PAGESIZE 65536
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#if __XSI_VISIBLE
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#undef PAGE_SIZE
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#define PAGE_SIZE PAGESIZE
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#endif
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/* Maximum number of attempts made to destroy a thread's thread-specific
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data values on thread exit. */
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/* FIXME: I really don't understand this value. Why should multiple
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attempts be necessary to destroy thread-specific data?!? Anyway, the
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current value here is 1, taken originally from our pthread.h file,
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where it was mistakenly defined first. Unfortunately this value is
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lower than the POSIX defined minimum value, which is 4. */
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#undef PTHREAD_DESTRUCTOR_ITERATIONS
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#define PTHREAD_DESTRUCTOR_ITERATIONS 1
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/* Maximum number of data keys that can be created by a process. */
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/* Tls has 1088 items - and we don't want to use them all :] */
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#undef PTHREAD_KEYS_MAX
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#define PTHREAD_KEYS_MAX 1024
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/* Minimum size in bytes of thread stack storage. */
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/* Actually the minimum stack size is somewhat of a split personality.
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The size parameter in a CreateThread call is the size of the initially
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commited stack size, which can be specified as low as 4K. However, the
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default *reserved* stack size is 1 Meg, unless the .def file specifies
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another STACKSIZE value. And even if you specify a stack size below 64K,
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the allocation granularity is in the way. You can never squeeze multiple
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threads in the same allocation granularity slot. Oh well. */
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#undef PTHREAD_STACK_MIN
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#define PTHREAD_STACK_MIN 65536
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/* Maximum number of threads that can be created per process. */
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/* Windows allows any arbitrary number of threads per process. */
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#undef PTHREAD_THREADS_MAX
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/* #define PTHREAD_THREADS_MAX unspecified */
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/* Maximum number of realtime signals reserved for application use. */
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/* FIXME: We only support one realtime signal in 32 bit mode, but
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_POSIX_RTSIG_MAX is 8. */
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#undef RTSIG_MAX
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#if __WORDSIZE == 64
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#define RTSIG_MAX 33
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#else
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#define RTSIG_MAX 1
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#endif
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/* Maximum number of semaphores that a process may have. */
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/* Windows allows any arbitrary number of semaphores per process. */
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#undef SEM_NSEMS_MAX
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/* #define SEM_NSEMS_MAX unspecified */
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/* The maximum value a semaphore may have. */
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#undef SEM_VALUE_MAX
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#define SEM_VALUE_MAX 1147483648
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/* Maximum number of queued signals that a process may send and have pending
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at the receiver(s) at any time. */
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#undef SIGQUEUE_MAX
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#define SIGQUEUE_MAX 32
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/* The maximum number of replenishment operations that may be simultaneously
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pending for a particular sporadic server scheduler. Not implemented. */
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#undef SS_REPL_MAX
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/* #define SS_REPL_MAX >= _POSIX_SS_REPL_MAX */
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/* Number of streams that one process can have open at one time. */
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#undef STREAM_MAX
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#define STREAM_MAX 20
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/* Maximum number of nested symbolic links. */
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#undef SYMLOOP_MAX
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#define SYMLOOP_MAX 10
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/* Maximum number of timer expiration overruns. */
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#undef TIMER_MAX
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#define TIMER_MAX 32
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/* Maximum length of the trace event name. Not implemented. */
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#undef TRACE_EVENT_NAME_MAX
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/* #define TRACE_EVENT_NAME_MAX >= _POSIX_TRACE_EVENT_NAME_MAX */
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/* Maximum length of the trace generation version string or of the trace
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stream name. Not implemented. */
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#undef TRACE_NAME_MAX
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/* #define TRACE_NAME_MAX >= _POSIX_TRACE_NAME_MAX */
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/* Maximum number of trace streams that may simultaneously exist in the
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system. Not implemented. */
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#undef TRACE_SYS_MAX
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/* #define TRACE_SYS_MAX >= _POSIX_TRACE_SYS_MAX */
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/* Maximum number of user trace event type identifiers that may simultaneously
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exist in a traced process, including the predefined user trace event
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POSIX_TRACE_UNNAMED_USER_EVENT. Not implemented. */
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#undef TRACE_USER_EVENT_MAX
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/* #define TRACE_USER_EVENT_MAX >= _POSIX_TRACE_USER_EVENT_MAX */
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/* Maximum number of characters in a tty name. */
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#undef TTY_NAME_MAX
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#define TTY_NAME_MAX 32
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/* Maximum number of bytes supported for the name of a timezone (not of the TZ variable). Not implemented. */
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#undef TZNAME_MAX
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/* #define TZNAME_MAX >= _POSIX_TZNAME_MAX */
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/* Pathname Variable Values */
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/* Minimum bits needed to represent the maximum size of a regular file. */
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#undef FILESIZEBITS
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#define FILESIZEBITS 64
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/* Maximum number of hardlinks to a file. */
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#undef LINK_MAX
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#define LINK_MAX 1024
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/* Maximum number of bytes in a terminal canonical input line. */
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#undef MAX_CANON
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#define MAX_CANON 255
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/* Minimum number of bytes available in a terminal input queue. */
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#undef MAX_INPUT
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#define MAX_INPUT 255
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/* Maximum length of a path component. */
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#undef NAME_MAX
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#define NAME_MAX 255
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/* Maximum length of a path given to API functions including trailing NUL.
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Deliberately set to the same default value as on Linux. Internal paths
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may be longer. */
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/* Keep in sync with __PATHNAME_MAX__ in cygwin/config.h */
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#undef PATH_MAX
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#define PATH_MAX 4096
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/* # of bytes in a pipe buf. This is the max # of bytes which can be
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written to a pipe in one atomic operation. */
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#undef PIPE_BUF
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#define PIPE_BUF 4096
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/* Minimum number of bytes of storage actually allocated for any portion
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of a file. Not implemented. */
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#undef POSIX_ALLOC_SIZE_MIN
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/* #define POSIX_ALLOC_SIZE_MIN unspecifed */
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/* Recommended increment for file transfer sizes between the
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{POSIX_REC_MIN_XFER_SIZE} and {POSIX_REC_MAX_XFER_SIZE} values.
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Not implemented. */
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#undef POSIX_REC_INCR_XFER_SIZE
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/* #define POSIX_REC_INCR_XFER_SIZE unspecifed */
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/* Maximum recommended file transfer size. Not implemented. */
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#undef POSIX_REC_MAX_XFER_SIZE
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/* #define POSIX_REC_MAX_XFER_SIZE unspecifed */
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/* Minimum recommended file transfer size. Not implemented. */
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#undef POSIX_REC_MIN_XFER_SIZE
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/* #define POSIX_REC_MIN_XFER_SIZE unspecifed */
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/* Recommended file transfer buffer alignment. Not implemented. */
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#undef POSIX_REC_XFER_ALIGN
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/* #define POSIX_REC_XFER_ALIGN unspecifed */
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/* Maximum number of bytes in a symbolic link. */
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#undef SYMLINK_MAX
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#define SYMLINK_MAX (PATH_MAX - 1)
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/* Runtime Increasable Values */
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#if __POSIX_VISIBLE >= 2
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/* Maximum obase values allowed by the bc utility. */
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#undef BC_BASE_MAX
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#define BC_BASE_MAX 99
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/* Maximum number of elements permitted in an array by the bc utility. */
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#undef BC_DIM_MAX
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#define BC_DIM_MAX 2048
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/* Maximum scale value allowed by the bc utility. */
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#undef BC_SCALE_MAX
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#define BC_SCALE_MAX 99
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/* Maximum length of a string constant accepted by the bc utility. */
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#undef BC_STRING_MAX
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#define BC_STRING_MAX 1000
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/* Maximum number of bytes in a character class name. Not implemented. */
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#undef CHARCLASS_NAME_MAX
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/* #define CHARCLASS_NAME_MAX >= _POSIX2_CHARCLASS_NAME_MAX */
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/* Maximum number of weights that can be assigned to an entry of the
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LC_COLLATE order keyword in the locale definition file. */
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/* FIXME: We don't support this at all right now, so this value is
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misleading at best. It's also lower than _POSIX2_COLL_WEIGHTS_MAX
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which is not good. So, for now we deliberately not define it even
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though it was defined in the former syslimits.h file. */
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#undef COLL_WEIGHTS_MAX
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/* #define COLL_WEIGHTS_MAX >= _POSIX2_COLL_WEIGHTS_MAX */
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/* Maximum number of expressions that can be nested within parentheses
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by the expr utility. */
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#undef EXPR_NEST_MAX
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#define EXPR_NEST_MAX 32
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/* Maximum bytes of a text utility's input line */
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#undef LINE_MAX
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#define LINE_MAX 2048
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/* Max num groups for a user, value taken from NT documentation */
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/* Must match <sys/param.h> NGROUPS */
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#undef NGROUPS_MAX
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#define NGROUPS_MAX 1024
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/* Maximum number of repeated occurrences of a regular expression when
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using the interval notation \{m,n\} */
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#undef RE_DUP_MAX
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#define RE_DUP_MAX 255
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#endif /* __POSIX_VISIBLE >= 2 */
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/* POSIX values */
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/* These should never vary from one system type to another */
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/* They represent the minimum values that POSIX systems must support.
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POSIX-conforming apps must not require larger values. */
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#if __POSIX_VISIBLE
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/* Maximum Values */
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#define _POSIX_CLOCKRES_MIN 20000000
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/* Minimum Values */
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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 25
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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_LOGIN_NAME_MAX 9
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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 14
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#define _POSIX_NGROUPS_MAX 8
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#define _POSIX_OPEN_MAX 20
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#define _POSIX_PATH_MAX 256
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#define _POSIX_PIPE_BUF 512
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#define _POSIX_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_SS_REPL_MAX 4
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#define _POSIX_SYMLINK_MAX 255
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#define _POSIX_SYMLOOP_MAX 8
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#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4
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#define _POSIX_THREAD_KEYS_MAX 128
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#define _POSIX_THREAD_THREADS_MAX 64
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#define _POSIX_TIMER_MAX 32
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#define _POSIX_TRACE_EVENT_NAME_MAX 30
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#define _POSIX_TRACE_NAME_MAX 8
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#define _POSIX_TRACE_SYS_MAX 8
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#define _POSIX_TRACE_USER_EVENT_MAX 32
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#define _POSIX_TTY_NAME_MAX 9
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#define _POSIX_TZNAME_MAX 6
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#endif /* __POSIX_VISIBLE */
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#if __POSIX_VISIBLE >= 2
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#define _POSIX2_BC_BASE_MAX 99
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#define _POSIX2_BC_DIM_MAX 2048
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#define _POSIX2_BC_SCALE_MAX 99
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#define _POSIX2_BC_STRING_MAX 1000
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#define _POSIX2_COLL_WEIGHTS_MAX 2
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#define _POSIX2_EXPR_NEST_MAX 32
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#define _POSIX2_LINE_MAX 2048
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#define _POSIX2_RE_DUP_MAX 255
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#endif /* __POSIX_VISIBLE >= 2 */
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#if __XSI_VISIBLE
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#define _XOPEN_IOV_MAX 16
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#define _XOPEN_NAME_MAX 255
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#define _XOPEN_PATH_MAX 1024
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#endif
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/* Other Invariant Values */
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#define NL_ARGMAX 9
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#if __XSI_VISIBLE
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#define NL_LANGMAX 14
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#endif
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#if __XSI_VISIBLE || __POSIX_VISIBLE >= 200809
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#define NL_MSGMAX 32767
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#define NL_SETMAX 255
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#define NL_TEXTMAX _POSIX2_LINE_MAX
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#endif
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#if __POSIX_VISIBLE < 200809
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#define NL_NMAX INT_MAX
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#endif
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#if __XSI_VISIBLE
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/* Default process priority. */
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#undef NZERO
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#define NZERO 20
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#endif
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#endif /* _MACH_MACHLIMITS_H_ */
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#endif /* _LIMITS_H___ */
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