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Cygwin: implement extensible clock interface

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- Drop hires_[nm]s clocks, rename hires.h to clock.h.

- Implement clk_t class as an extensible clock class in new file clock.cc.

- Introduce get_clock(clock_id) returning a pointer to the clk_t instance
  for clock_id.  Provide the following methods along the lines of the former
  hires classes:

	void		clk_t::nsecs (struct timespec *);
	ULONGLONG	clk_t::nsecs ();
	LONGLONG	clk_t::usecs ();
	LONGLONG	clk_t::msecs ();
	void 		clk_t::resolution (struct timespec *);

- Add CLOCK_REALTIME_COARSE, CLOCK_MONOTONIC_RAW, CLOCK_MONOTONIC_COARSE
  and CLOCK_BOOTTIME clocks.

- Allow clock_nanosleep, pthread_condattr_setclock and timer_create to use
  all new clocks (both clocks should be usable with a small tweak, though).

- Bump DLL major version to 2.12.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen
2018-11-27 13:47:02 +01:00
parent f4d6ef2d41
commit c05df02725
20 changed files with 541 additions and 297 deletions
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13
winsup/cygwin/timer.cc
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@ -127,7 +127,7 @@ timer_thread (VOID *x)
LONG sleep_ms;
/* Account for delays in starting thread
and sending the signal */
now = gtod.usecs ();
now = get_clock (tt->clock_id)->usecs ();
sleep_us = sleepto_us - now;
if (sleep_us > 0)
{
@ -232,7 +232,8 @@ timer_tracker::settime (int in_flags, const itimerspec *value, itimerspec *ovalu
if (timespec_bad (value->it_value) || timespec_bad (value->it_interval))
__leave;
long long now = in_flags & TIMER_ABSTIME ? 0 : gtod.usecs ();
long long now = in_flags & TIMER_ABSTIME ?
0 : get_clock (clock_id)->usecs ();
lock_timer_tracker here;
cancel ();
@ -272,7 +273,7 @@ timer_tracker::gettime (itimerspec *ovalue)
else
{
ovalue->it_interval = it_interval;
long long now = gtod.usecs ();
long long now = get_clock (clock_id)->usecs ();
long long left_us = sleepto_us - now;
if (left_us < 0)
left_us = 0;
@ -317,7 +318,7 @@ timer_create (clockid_t clock_id, struct sigevent *__restrict evp,
return -1;
}
if (clock_id != CLOCK_REALTIME)
if (clock_id >= MAX_CLOCKS)
{
set_errno (EINVAL);
return -1;
@ -466,8 +467,8 @@ alarm (unsigned int seconds)
struct itimerspec newt = {}, oldt;
/* alarm cannot fail, but only needs not be
correct for arguments < 64k. Truncate */
if (seconds > (HIRES_DELAY_MAX / 1000 - 1))
seconds = (HIRES_DELAY_MAX / 1000 - 1);
if (seconds > (CLOCK_DELAY_MAX / 1000 - 1))
seconds = (CLOCK_DELAY_MAX / 1000 - 1);
newt.it_value.tv_sec = seconds;
timer_settime ((timer_t) &ttstart, 0, &newt, &oldt);
int ret = oldt.it_value.tv_sec + (oldt.it_value.tv_nsec > 0);