tavoid redefining sched_yield (Christian Pfeil) - plan9port - [fork] Plan 9 from user space
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---
DIR commit 5db07ba9422804c9de1e8fbda5486722cb731e03
DIR parent c77223280246ddb86def848bb3e24bf6ebe90185
HTML Author: rsc <devnull@localhost>
Date: Fri, 3 Mar 2006 01:39:10 +0000
avoid redefining sched_yield (Christian Pfeil)
Diffstat:
M src/lib9/date.c | 97 +++++++++++--------------------
M src/lib9/sleep.c | 2 ++
2 files changed, 37 insertions(+), 62 deletions(-)
---
DIR diff --git a/src/lib9/date.c b/src/lib9/date.c
t@@ -1,30 +1,28 @@
-#include <u.h>
-#include <stdlib.h> /* setenv etc. */
#define NOPLAN9DEFINES
+#include <u.h>
#include <libc.h>
+#include <stdlib.h> /* setenv etc. */
#include <time.h>
-#define _HAVETIMEGM 1
-#define _HAVETMZONE 1
-#define _HAVETMGMTOFF 1
-
-#if defined(__linux__)
-# undef _HAVETMZONE
-
-#elif defined(__sun__)
-# undef _HAVETIMEGM
-# undef _HAVETMZONE
-# undef _HAVETMGMTOFF
+static int didtz;
+static int tzdelta;
+static char tzone[4];
-#endif
+static void
+dotz(void)
+{
+ time_t t;
-static Tm bigtm;
+ if(didtz)
+ return;
+ t = time(0);
+ tzdelta = t - mktime(gmtime(&t));
+ strftime(tzone, sizeof tzone, "%Z", localtime(&t));
+}
static void
-tm2Tm(struct tm *tm, Tm *bigtm)
+tm2Tm(struct tm *tm, Tm *bigtm, int gmt)
{
- char *s;
-
memset(bigtm, 0, sizeof *bigtm);
bigtm->sec = tm->tm_sec;
bigtm->min = tm->tm_min;
t@@ -33,17 +31,13 @@ tm2Tm(struct tm *tm, Tm *bigtm)
bigtm->mon = tm->tm_mon;
bigtm->year = tm->tm_year;
bigtm->wday = tm->tm_wday;
- strftime(bigtm->zone, sizeof bigtm->zone, "%Z", tm);
-#ifdef _HAVETMGMTOFF
- bigtm->tzoff = tm->tm_gmtoff;
-#endif
-
- if(bigtm->zone[0] == 0){
- s = getenv("TIMEZONE");
- if(s){
- strecpy(bigtm->zone, bigtm->zone+4, s);
- free(s);
- }
+ if(gmt){
+ strcpy(bigtm->zone, "GMT");
+ bigtm->tzoff = 0;
+ }else{
+ dotz();
+ strcpy(bigtm->zone, tzone);
+ bigtm->tzoff = tzdelta;
}
}
t@@ -58,12 +52,6 @@ Tm2tm(Tm *bigtm, struct tm *tm)
tm->tm_mon = bigtm->mon;
tm->tm_year = bigtm->year;
tm->tm_wday = bigtm->wday;
-#ifdef _HAVETMZONE
- tm->tm_zone = bigtm->zone;
-#endif
-#ifdef _HAVETMGMTOFF
- tm->tm_gmtoff = bigtm->tzoff;
-#endif
}
Tm*
t@@ -71,10 +59,11 @@ p9gmtime(long x)
{
time_t t;
struct tm tm;
-
+ static Tm bigtm;
+
t = (time_t)x;
tm = *gmtime(&t);
- tm2Tm(&tm, &bigtm);
+ tm2Tm(&tm, &bigtm, 1);
return &bigtm;
}
t@@ -83,42 +72,26 @@ p9localtime(long x)
{
time_t t;
struct tm tm;
+ static Tm bigtm;
t = (time_t)x;
tm = *localtime(&t);
- tm2Tm(&tm, &bigtm);
+ tm2Tm(&tm, &bigtm, 0);
return &bigtm;
}
-#if !defined(_HAVETIMEGM)
-static time_t
-timegm(struct tm *tm)
-{
- time_t ret;
- char *tz;
- char *s;
-
- tz = getenv("TZ");
- putenv("TZ=");
- tzset();
- ret = mktime(tm);
- if(tz){
- s = smprint("TZ=%s", tz);
- if(s)
- putenv(s);
- }
- return ret;
-}
-#endif
-
long
p9tm2sec(Tm *bigtm)
{
+ time_t t;
struct tm tm;
Tm2tm(bigtm, &tm);
- if(strcmp(bigtm->zone, "GMT") == 0 || strcmp(bigtm->zone, "UCT") == 0)
- return timegm(&tm);
- return mktime(&tm); /* local time zone */
+ t = mktime(&tm);
+ if(strcmp(bigtm->zone, "GMT") == 0 || strcmp(bigtm->zone, "UCT") == 0){
+ dotz();
+ t += tzdelta;
+ }
+ return t;
}
DIR diff --git a/src/lib9/sleep.c b/src/lib9/sleep.c
t@@ -6,6 +6,7 @@
#include <libc.h>
#if defined(__NetBSD__) || (defined(__OpenBSD__) && OpenBSD <= 200511)
+#if !defined(sched_yield)
# define sched_yield() \
do{ struct timespec ts; \
ts.tv_sec = 0; \
t@@ -13,6 +14,7 @@
nanosleep(&ts, 0); \
}while(0)
#endif
+#endif
int
p9sleep(long milli)