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ada: Use CLOCK_MONOTONIC on VxWorks

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The monotonic clock keeps track of the time that has elapsed since
system startup; that is, the value returned by clock_gettime() is the
amount of time (in seconds and nanoseconds) that has passed since the
system booted. The monotonic clock cannot be reset. As a result,
time interval measurements made relative to the monotonic clock are
not subject to errors resulting from the clock time being unexpectedly
adjusted between the interval start and end.

gcc/ada/

	* s-oscons-tmplt.c: #define CLOCK_RT_Ada "CLOCK_MONOTONIC" for
	__vxworks
This commit is contained in:
Doug Rupp 2023-10-12 12:31:46 -07:00 • committed by Marc Poulhiès
parent d75ca8a67e
commit fee97b366b
1 changed files with 2 additions and 1 deletions
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3
gcc/ada/s-oscons-tmplt.c
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@ -1975,7 +1975,8 @@ CND(CLOCK_THREAD_CPUTIME_ID, "Thread CPU clock")
#if defined(__linux__) || defined(__FreeBSD__) \
|| (defined(_AIX) && defined(_AIXVERSION_530)) \
|| defined(__DragonFly__) || defined(__QNX__)
|| defined(__DragonFly__) || defined(__QNX__) \
|| defined (__vxworks)
/** On these platforms use system provided monotonic clock instead of
** the default CLOCK_REALTIME. We then need to set up cond var attributes
** appropriately (see thread.c).