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Annotation of coherent/f/usr/include.78/sys/__time.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * /usr/include/sys/__time.h
                      3:  *
                      4:  * Definition of __time_t.
                      5:  *
                      6:  * Revised: Wed May 19 10:27:34 1993 CDT
                      7:  */
                      8: #ifndef        __SYS___TIME_H__
                      9: #define        __SYS___TIME_H__
                     10: 
                     11: /*
                     12:  * This internal header file is intended as the sole point of definition for
                     13:  * the internal data type "__time_t", exactly equivalent to the ISO C data
                     14:  * type "time_t" but given an internal name so that header files may refer
                     15:  * to the type without exporting the user-level type unnecessarily.
                     16:  *
                     17:  * The System V ABI and the iBCS2 specification set define "time_t" as a long.
                     18:  * A POSIX.1 system is permitted to use "unsigned long" to extend the range of
                     19:  * time values since the POSIX.1 epoch, since comforming applications should
                     20:  * be using ((time_t) -1) to detect errors.
                     21:  *
                     22:  * For now, we resolve this conflict by use of the _POSIX_SOURCE feature-test
                     23:  * macro. If _POSIX_SOURCE is defined, then we use the "unsigned long" form as
                     24:  * the client has contracted us in a POSIX guise.
                     25:  */
                     26: 
                     27: #if    defined(_POSIX_SOURCE)
                     28: 
                     29: typedef        unsigned long   __time_t;
                     30: 
                     31: #else
                     32: 
                     33: typedef        long            __time_t;
                     34: 
                     35: #endif
                     36: 
                     37: 
                     38: #endif /* ! defined (__SYS___TIME_H__) */

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