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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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4
winsup/cygwin/select.cc
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@@ -159,7 +159,7 @@ select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
int ret = 0;
/* Record the current time for later use. */
LONGLONG start_time = gtod.usecs ();
LONGLONG start_time = get_clock (CLOCK_REALTIME)->usecs ();
select_stuff sel;
sel.return_on_signal = 0;
@@ -210,7 +210,7 @@ select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
if (us != -1LL && wait_state == select_stuff::select_set_zero)
{
select_printf ("recalculating us");
LONGLONG now = gtod.usecs ();
LONGLONG now = get_clock (CLOCK_REALTIME)->usecs ();
if (now >= (start_time + us))
{
select_printf ("timed out after verification");