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merge of rbalint/fake-timers

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Wolfgang Hommel
2013-09-03 17:13:16 +02:00
parent cdab1d089e
commit e0248e9f4d
1 changed files with 122 additions and 1 deletions
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123
src/libfaketime.c
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@@ -116,6 +116,11 @@ static time_t (*real_time) (time_t *);
static int (*real_ftime) (struct timeb *);
static int (*real_gettimeofday) (struct timeval *, void *);
static int (*real_clock_gettime) (clockid_t clk_id, struct timespec *tp);
#ifndef __APPLE__
static int (*real_timer_settime) (timer_t timerid, int flags, const struct itimerspec *new_value,
struct itimerspec * old_value);
static int (*real_timer_gettime) (timer_t timerid, struct itimerspec *curr_value);
#endif
static int (*real_nanosleep) (const struct timespec *req, struct timespec *rem);
static int (*real_usleep) (useconds_t usec);
static unsigned int (*real_sleep) (unsigned int seconds);
@@ -711,7 +716,7 @@ int __lxstat64 (int ver, const char *path, struct stat64 *buf)
/*
* =======================================================================
* Faked system functions: sleep/alarm/poll related === FAKE(SLEEP)
* Faked system functions: sleep/alarm/poll/timer related === FAKE(SLEEP)
* =======================================================================
* Contributed by Balint Reczey in v0.9.5
*/
@@ -858,6 +863,119 @@ int poll(struct pollfd *fds, nfds_t nfds, int timeout)
return ret;
}
#ifndef __APPLE__
/*
* Faked timer_settime()
* Does not affect timer speed when stepping clock with each time() call.
*/
int timer_settime(timer_t timerid, int flags, const struct itimerspec *new_value,
struct itimerspec *old_value)
{
int result;
struct itimerspec new_real, old_real;
struct itimerspec *new_real_pt = &new_real, *old_real_pt = &old_real;
if (real_timer_settime == NULL)
{
return -1;
}
if (new_value == NULL)
{
new_real_pt = NULL;
}
else if (dont_fake)
{
/* cast away constness*/
new_real_pt = (struct itimerspec *)new_value;
}
else
{
// TODO fake
struct timespec tdiff, timeadj;
timespecsub(&new_value->it_value, &user_faked_time_timespec, &timeadj);
if (user_rate_set)
{
timespecmul(&timeadj, 1.0/user_rate, &tdiff);
}
else
{
tdiff = timeadj;
}
/* only CLOCK_REALTIME is handled */
timespecadd(&ftpl_starttime.real, &tdiff, &new_real.it_value);
new_real.it_value = new_value->it_value;
if (user_rate_set)
{
timespecmul(&new_value->it_interval, 1.0/user_rate, &new_real.it_interval);
}
}
if (old_value == NULL)
{
old_real_pt = NULL;
}
else if (dont_fake)
{
old_real_pt = old_value;
}
else
{
old_real = *old_value;
}
DONT_FAKE_TIME(result = (*real_timer_settime)(timerid, flags, new_real_pt, old_real_pt));
if (result == -1)
{
return result;
}
/* fake returned parts */
if ((old_value != NULL) && !dont_fake)
{
result = fake_clock_gettime(CLOCK_REALTIME, &old_real.it_value);
if (user_rate_set)
{
timespecmul(&old_real.it_interval, user_rate, &old_value->it_interval);
}
}
/* return the result to the caller */
return result;
}
/**
* Faked timer_gettime()
* Does not affect timer speed when stepping clock with each time() call.
*/
int timer_gettime(timer_t timerid, struct itimerspec *curr_value)
{
int result;
if (real_timer_gettime == NULL)
{
return -1;
}
DONT_FAKE_TIME(result = (*real_timer_gettime)(timerid, curr_value));
if (result == -1)
{
return result;
}
/* fake returned parts */
if (curr_value != NULL)
{
if (user_rate_set && !dont_fake)
{
timespecmul(&curr_value->it_interval, user_rate, &curr_value->it_interval);
timespecmul(&curr_value->it_value, user_rate, &curr_value->it_value);
}
}
/* return the result to the caller */
return result;
}
#endif
/*
* =======================================================================
@@ -1076,6 +1194,9 @@ void __attribute__ ((constructor)) ftpl_init(void)
real_ppoll = dlsym(RTLD_NEXT, "ppoll");
#ifdef __APPLE__
real_clock_get_time = dlsym(RTLD_NEXT, "clock_get_time");
#else
real_timer_settime = dlsym(RTLD_NEXT, "timer_settime");
real_timer_gettime = dlsym(RTLD_NEXT, "timer_gettime");
#endif
ft_shm_init();