src/head/time.h

	time.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*  Copyright (c) 1988 AT&T */
/*    All Rights Reserved   */


/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _TIME_H
#define _TIME_H

#pragma ident   "%Z%%M% %I% %E% SMI"    /* SVr4.0 1.18 */

#include <sys/feature_tests.h>
#include <iso/time_iso.h>
#if (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
    (_POSIX_C_SOURCE > 2) || defined(__EXTENSIONS__)
#include <sys/types.h>
#include <sys/time_impl.h>
#endif /* (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) ... */

/*
 * Allow global visibility for symbols defined in
 * C++ "std" namespace in <iso/time_iso.h>.
 */
#if __cplusplus >= 199711L
using std::size_t;
using std::clock_t;
using std::time_t;
using std::tm;
using std::asctime;
using std::clock;
using std::ctime;
using std::difftime;
using std::gmtime;
using std::localtime;
using std::mktime;
using std::time;
using std::strftime;
#endif

#ifdef  __cplusplus
extern "C" {
#endif

#ifndef _CLOCKID_T
#define _CLOCKID_T
typedef int clockid_t;
#endif

#ifndef _TIMER_T
#define _TIMER_T
typedef int timer_t;
#endif

#if defined(__STDC__)

#if defined(__EXTENSIONS__) || \
    (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
    (_POSIX_C_SOURCE - 0 >= 199506L) || defined(_REENTRANT)
extern struct tm *gmtime_r(const time_t *_RESTRICT_KYWD,
            struct tm *_RESTRICT_KYWD);
extern struct tm *localtime_r(const time_t *_RESTRICT_KYWD,
            struct tm *_RESTRICT_KYWD);
#endif

#if (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
    defined(_XPG4) || defined(__EXTENSIONS__)

#ifdef _STRPTIME_DONTZERO
#ifdef __PRAGMA_REDEFINE_EXTNAME
#pragma redefine_extname strptime __strptime_dontzero
#else   /* __PRAGMA_REDEFINE_EXTNAME */
extern char *__strptime_dontzero(const char *, const char *, struct tm *);
#define strptime    __strptime_dontzero
#endif  /* __PRAGMA_REDEFINE_EXTNAME */
#endif  /* _STRPTIME_DONTZERO */

extern char *strptime(const char *_RESTRICT_KYWD, const char *_RESTRICT_KYWD,
        struct tm *_RESTRICT_KYWD);

#endif /* (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX))... */

#if (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
    (_POSIX_C_SOURCE > 2) || defined(__EXTENSIONS__)
/*
 * Neither X/Open nor POSIX allow the inclusion of <signal.h> for the
 * definition of the sigevent structure.  Both require the inclusion
 * of <signal.h> and <time.h> when using the timer_create() function.
 * However, X/Open also specifies that the sigevent structure be defined
 * in <time.h> as described in the header <signal.h>.  This prevents
 * compiler warnings for applications that only include <time.h> and not
 * also <signal.h>.  The sigval union and the sigevent structure is
 * therefore defined both here and in <sys/siginfo.h> which gets included
 * via inclusion of <signal.h>.
 */
#ifndef _SIGVAL
#define _SIGVAL
union sigval {
    int sival_int;  /* integer value */
    void    *sival_ptr; /* pointer value */
};
#endif  /* _SIGVAL */

#ifndef _SIGEVENT
#define _SIGEVENT
struct sigevent {
    int     sigev_notify;   /* notification mode */
    int     sigev_signo;    /* signal number */
    union sigval    sigev_value;    /* signal value */
    void        (*sigev_notify_function)(union sigval);
    pthread_attr_t  *sigev_notify_attributes;
    int     __sigev_pad2;
};
#endif  /* _SIGEVENT */

extern int clock_getres(clockid_t, struct timespec *);
extern int clock_gettime(clockid_t, struct timespec *);
extern int clock_settime(clockid_t, const struct timespec *);
extern int timer_create(clockid_t, struct sigevent *_RESTRICT_KYWD,
        timer_t *_RESTRICT_KYWD);
extern int timer_delete(timer_t);
extern int timer_getoverrun(timer_t);
extern int timer_gettime(timer_t, struct itimerspec *);
extern int timer_settime(timer_t, int, const struct itimerspec *_RESTRICT_KYWD,
        struct itimerspec *_RESTRICT_KYWD);

extern int nanosleep(const struct timespec *, struct timespec *);
extern int clock_nanosleep(clockid_t, int,
    const struct timespec *, struct timespec *);

#endif /* (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX))... */

#if !defined(_STRICT_STDC) || defined(__XOPEN_OR_POSIX) || \
    defined(__EXTENSIONS__)

extern void tzset(void);
extern char *tzname[2];

/* CLK_TCK marked as LEGACY in SUSv2 and removed in SUSv3 */
#if !defined(_XPG6) || defined(__EXTENSIONS__)
#ifndef CLK_TCK
extern long _sysconf(int);  /* System Private interface to sysconf() */
#define CLK_TCK ((clock_t)_sysconf(3))  /* clock ticks per second */
                /* 3 is _SC_CLK_TCK */
#endif
#endif /* !defined(_XPG6) || defined(__EXTENSIONS__) */

#if (!defined(_STRICT_STDC) && !defined(_POSIX_C_SOURCE)) || \
    defined(_XOPEN_SOURCE) || defined(__EXTENSIONS__)
extern long timezone;
extern int daylight;
#endif

#endif /* !defined(_STRICT_STDC) || defined(__XOPEN_OR_POSIX)... */

#if (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX))
extern int cftime(char *, char *, const time_t *);
extern int ascftime(char *, const char *, const struct tm *);
extern long altzone;
#endif

#if (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
    defined(_XPG4_2) || defined(__EXTENSIONS__)
extern struct tm *getdate(const char *);
#ifdef  _REENTRANT
#undef getdate_err
#define getdate_err *(int *)_getdate_err_addr()
extern int *_getdate_err_addr(void);
#else
extern int getdate_err;
#endif /* _REENTRANT */
#endif /* (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX))... */

#else /* __STDC__ */

extern int cftime(), ascftime();
extern void tzset();

#ifdef _STRPTIME_DONTZERO
#ifdef __PRAGMA_REDEFINE_EXTNAME
#pragma redefine_extname strptime   __strptime_dontzero
#else   /* __PRAGMA_REDEFINE_EXTNAME */
extern char *__strptime_dontzero();
#define strptime    __strptime_dontzero
#endif  /* __PRAGMA_REDEFINE_EXTNAME */
#endif  /* _STRPTIME_DONTZERO */

extern char *strptime();

#if defined(__EXTENSIONS__) || \
    (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
    (_POSIX_C_SOURCE - 0 >= 199506L) || defined(_REENTRANT)
extern struct tm *gmtime_r();
extern struct tm *localtime_r();
#endif

extern long timezone, altzone;
extern int daylight;
extern char *tzname[2];

#if !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2) || defined(__EXTENSIONS__)
extern struct tm *getdate();
#ifdef  _REENTRANT
#undef getdate_err
#define getdate_err *(int *)_getdate_err_addr()
extern int *_getdate_err_addr();
#else
extern int getdate_err;
#endif /* _REENTRANT */
#endif /* !defined(__XOPEN_OR_POSIX) || defined(_XPG4_2)... */

#endif  /* __STDC__ */

/*
 * ctime_r() & asctime_r() prototypes are defined here.
 */

/*
 * Previous releases of Solaris, starting at 2.3, provided definitions of
 * various functions as specified in POSIX.1c, Draft 6.  For some of these
 * functions, the final POSIX 1003.1c standard had a different number of
 * arguments and return values.
 *
 * The following segment of this header provides support for the standard
 * interfaces while supporting applications written under earlier
 * releases.  The application defines appropriate values of the feature
 * test macros _POSIX_C_SOURCE and _POSIX_PTHREAD_SEMANTICS to indicate
 * whether it was written to expect the Draft 6 or standard versions of
 * these interfaces, before including this header.  This header then
 * provides a mapping from the source version of the interface to an
 * appropriate binary interface.  Such mappings permit an application
 * to be built from libraries and objects which have mixed expectations
 * of the definitions of these functions.
 *
 * For applications using the Draft 6 definitions, the binary symbol is the
 * same as the source symbol, and no explicit mapping is needed.  For the
 * standard interface, the function func() is mapped to the binary symbol
 * _posix_func().  The preferred mechanism for the remapping is a compiler
 * #pragma.  If the compiler does not provide such a #pragma, the header file
 * defines a static function func() which calls the _posix_func() version;
 * this has to be done instead of #define since POSIX specifies that an
 * application can #undef the symbol and still be bound to the correct
 * implementation.  Unfortunately, the statics confuse lint so we fallback to
 * #define in that case.
 *
 * NOTE: Support for the Draft 6 definitions is provided for compatibility
 * only.  New applications/libraries should use the standard definitions.
 */

#if defined(__EXTENSIONS__) || defined(_REENTRANT) || \
    (!defined(_STRICT_STDC) && !defined(__XOPEN_OR_POSIX)) || \
    (_POSIX_C_SOURCE - 0 >= 199506L) || defined(_POSIX_PTHREAD_SEMANTICS)

#if defined(__STDC__)

#if (_POSIX_C_SOURCE - 0 >= 199506L) || defined(_POSIX_PTHREAD_SEMANTICS)

#ifdef __PRAGMA_REDEFINE_EXTNAME
#pragma redefine_extname ctime_r __posix_ctime_r
#pragma redefine_extname asctime_r __posix_asctime_r
extern char *asctime_r(const struct tm *_RESTRICT_KYWD, char *_RESTRICT_KYWD);
extern char *ctime_r(const time_t *, char *);
#else  /* __PRAGMA_REDEFINE_EXTNAME */

extern char *__posix_asctime_r(const struct tm *_RESTRICT_KYWD,
    char *_RESTRICT_KYWD);
extern char *__posix_ctime_r(const time_t *, char *);

#ifdef  __lint

#define ctime_r __posix_ctime_r
#define asctime_r __posix_asctime_r

#else   /* !__lint */

static char *
asctime_r(const struct tm *_RESTRICT_KYWD __tm, char *_RESTRICT_KYWD __buf)
{
    return (__posix_asctime_r(__tm, __buf));
}

static char *
ctime_r(const time_t *__time, char *__buf)
{
    return (__posix_ctime_r(__time, __buf));
}

#endif /* !__lint */
#endif /* __PRAGMA_REDEFINE_EXTNAME */

#else  /* (_POSIX_C_SOURCE - 0 >= 199506L) || ... */

extern char *asctime_r(const struct tm *, char *, int);
extern char *ctime_r(const time_t *, char *, int);

#endif  /* (_POSIX_C_SOURCE - 0 >= 199506L) || ... */

#else  /* __STDC__ */

#if (_POSIX_C_SOURCE - 0 >= 199506L) || defined(_POSIX_PTHREAD_SEMANTICS)

#ifdef __PRAGMA_REDEFINE_EXTNAME
#pragma redefine_extname asctime_r __posix_asctime_r
#pragma redefine_extname ctime_r __posix_ctime_r
extern char *asctime_r();
extern char *ctime_r();
#else  /* __PRAGMA_REDEFINE_EXTNAME */

extern char *__posix_asctime_r();
extern char *__posix_ctime_r();

#ifdef  __lint

#define asctime_r __posix_asctime_r
#define ctime_r __posix_ctime_r

#else   /* !__lint */

static char *
asctime_r(__tm, __buf)
    struct tm *__tm;
    char *__buf;
{
    return (__posix_asctime_r(__tm, __buf));
}
static char *
ctime_r(__time, __buf)
    time_t *__time;
    char *__buf;
{
    return (__posix_ctime_r(__time, __buf));
}

#endif /* !__lint */
#endif /* __PRAGMA_REDEFINE_EXTNAME */

#else  /* (_POSIX_C_SOURCE - 0 >= 199506L) || ... */

extern char *asctime_r();
extern char *ctime_r();

#endif /* (_POSIX_C_SOURCE - 0 >= 199506L) || ... */

#endif /* __STDC__ */

#endif /* defined(__EXTENSIONS__) || defined(_REENTRANT)... */

#ifdef  __cplusplus
}
#endif

#endif  /* _TIME_H */