code review: help implementing clock_montonic

zack_on_the_speed_chanel zack_on_the_speed_chanel at
Fri May 7 18:52:58 UTC 2021


Currenttly i'm trying to implement the clock_monotonic which was part of ticket #3889. So far these are the changes are as follows

ptimer->clock_type= &clock_id;
in the timer create i added a field for the timer id and saved it when the timer was made. Then in getttime I used the appropriate timers to get the time.

for example.

if (ptimer->clock_type ==CLOCK_REALTIME) {
Per_CPU_Control *cpu;
struct timespec spec;
struct timespec expire;

cpu = _POSIX_Timer_Acquire_critical( ptimer, &lock_context );
_Timespec_From_ticks( expire, &ptimer->Timer.expire);

if (spec->tv.nsec+spec->tv.sec > expire->tv.nsec+expire->tv.sec ) {

remaining = (uint32_t) (expire->tv.nsec+expire->tv.sec - spec->tv.nsec+spec->tv.sec);
} else {
remaining = 0;

_Timespec_From_ticks( remaining, &value->it_value );
value->it_interval = ptimer->timer_data.it_interval;

_POSIX_Timer_Release( cpu, &lock_context );
return 0;
Here i made two separate cases for getting the time. Also joel told me to I feel that it is a bit redundant to call everything using timespec to calculating remaining time and then just use timespec_From_ticks to get the time. It was a recommendation from Joel. Did I make the correct change. Also I assume that Delete does not need any changes because It does not require any measuring of time. Is there anything i need to change for timer_settime?

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