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New hacks for include files to get time_t in the most portable way.

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Added Turbo C milli functions (courtesy Mark Anacker)
Disable THINK C sleep for 4.0
This commit is contained in:
Guido van Rossum 1991-04-16 08:47:51 +00:00
parent 753e2bfbbf
commit 80c9d88cbf
1 changed files with 54 additions and 10 deletions
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64
Modules/timemodule.c
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@ -33,13 +33,30 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#include <signal.h>
#include <setjmp.h>
#ifdef __STDC__
#include <time.h>
#else /* !__STDC__ */
typedef unsigned long time_t;
extern time_t time();
#endif /* !__STDC__ */
/* What happens here is not trivial.
The BSD_TIME code needs <sys/time.h> (for struct timeval).
The rest of the code needs only time_t, except some MS-DOS
code which needs clock_t as well.
Standard C says that time_t is defined in <time.h>, and
does not have <sys/types.h>; THINK C agrees (MS-DOS too?).
What's worse, in pure 4.3 BSD, older SunOS versions, and
probably everything derived from BSD, you can't #include
both <time.h> and <sys/time.h> in the same file, since
<sys/time.h> includes <time.h> without any protection,
and <time.h> contains a typedef, which can't be parsed twice!
So on traditional UNIX systems we include <sys/types.h>
and <sys/time.h> and hope this implies <time.h> and time_t,
while on other systems, including conforming Standard C
systems (where 'unix' can't be defined), we rely on <time.h>.
Still one problem: BSD_TIME won't work with strict Standard C...
*/
#ifdef unix
#include <sys/types.h>
#include <sys/time.h> /* Implies <time.h> everywhere, as far as I know */
#else /* !unix */
#include <time.h>
#endif /* !unix */
/* Time methods */
@ -51,7 +68,7 @@ time_time(self, args)
time_t secs;
if (!getnoarg(args))
return NULL;
secs = time((time_t *)NULL);
time(&secs);
#ifdef THINK_C
#ifndef THINK_C_3_0
/* Difference in origin between Mac and Unix clocks: */
@ -109,6 +126,10 @@ extern long sys_milli();
#define DO_MILLI
#endif /* BSD_TIME */
#ifdef TURBO_C
#define DO_MILLI
#endif
#ifdef DO_MILLI
static object *
@ -172,6 +193,7 @@ inittime()
#define MacTicks (* (long *)0x16A)
#ifdef THINK_C_3_0
sleep(msecs)
int msecs;
{
@ -183,6 +205,7 @@ sleep(msecs)
sleep_catcher(SIGINT);
}
}
#endif
millisleep(msecs)
long msecs;
@ -207,9 +230,6 @@ millitimer()
#ifdef BSD_TIME
#include <sys/types.h>
#include <sys/time.h>
long
millitimer()
{
@ -232,3 +252,27 @@ millisleep(msecs)
#endif /* BSD_TIME */
#ifdef TURBO_C /* Maybe also for MS-DOS? */
#ifndef CLOCKS_PER_SEC
#define CLOCKS_PER_SEC 55 /* 54.945 msec per tick (18.2 HZ clock) */
#endif
static
millisleep(msecs)
long msecs;
{
delay(msecs);
}
static long
millitimer()
{
clock_t ticks;
ticks = clock(); /* ticks since program start */
return ticks * CLOCKS_PER_SEC;
}
#endif /* TURBO_C */