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Introduce time_offset() helper and replace open-coded versions in timer.c

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This function takes a struct timeval and offsets it by a (potentially fractional)
number of seconds, given as a 'double'.
This commit is contained in:
Kevin Easton
2017-09-20 23:07:52 +10:00
parent 604fcf794b
commit bbd18ba47e
3 changed files with 47 additions and 50 deletions
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1
include/ircaux.h
View File

@@ -74,6 +74,7 @@ double BX_time_diff (struct timeval, struct timeval);
double time_since(const struct timeval *tv_from);
double time_until(const struct timeval *tv_to);
int time_cmp(const struct timeval *a, const struct timeval *b);
struct timeval *time_offset(struct timeval *tv, double offset);
char * BX_plural (int);
int BX_time_to_next_minute (void);
char * BX_remove_trailing_spaces (char *);

20
source/ircaux.c
View File

@@ -1747,6 +1747,26 @@ int time_cmp(const struct timeval *a, const struct timeval *b)
return (a->tv_sec > b->tv_sec) - (a->tv_sec < b->tv_sec);
}
/* Add an offset, in seconds, to a timeval */
struct timeval *time_offset(struct timeval *tv, double offset)
{
time_t seconds = offset; /* Discards fractional part */
offset -= seconds;
if (offset < 0.0)
{
/* This ensures we never make tv_usec go negative, since it might be unsigned. */
offset += 1.0;
seconds -= 1;
}
tv->tv_usec += offset * 1000000.0;
seconds += tv->tv_usec / 1000000;
tv->tv_usec %= 1000000;
tv->tv_sec += seconds;
return tv;
}
int BX_time_to_next_minute (void)
{
time_t now = time(NULL);

28
source/timer.c
View File

@@ -231,18 +231,7 @@ extern void ExecuteTimers (void)
current->events--;
case -1:
{
#if 1
double milli, seconds;
milli = current->interval * 1000 * 1000 + current->time.tv_usec;
seconds = current->time.tv_sec + (milli / 1000000);
milli = ((unsigned long)current) % 1000000;
current->time.tv_sec = seconds;
current->time.tv_usec = milli;
#else
current->time.tv_usec += (current->interval * 1000);
current->time.tv_sec += (current->time.tv_usec / 1000000);
current->time.tv_usec %= 1000000;
#endif
time_offset(&current->time, current->interval);
schedule_timer(current);
break;
}
@@ -464,24 +453,11 @@ char *BX_add_timer(int update, char *refnum_want, double when, long events, int
{
TimerList *ntimer, *otimer = NULL;
char refnum_got[REFNUM_MAX+1] = "";
double seconds = 0.0, milli = 0.0;
extern double fmod(double, double);
ntimer = (TimerList *) new_malloc(sizeof(TimerList));
get_time(&ntimer->time);
#if 1
milli = when * 1000 + ntimer->time.tv_usec;
seconds = ntimer->time.tv_sec + (milli / 1000000);
milli = ((unsigned long)milli) % 1000000;
ntimer->time.tv_sec = seconds;
ntimer->time.tv_usec = milli;
#else
ntimer->time.tv_usec += (unsigned long)when;
ntimer->time.tv_sec += ((when + ntimer->time.tv_usec) / 1000);
ntimer->time.tv_usec %= 1000;
#endif
time_offset(&ntimer->time, when / 1000.0);
ntimer->interval = when / 1000;
ntimer->events = events;