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Refactor Darwin platform unit conversion helpers

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This commit is contained in:
Alexander Momchilov
2021-08-22 10:47:11 -04:00
parent fa48c484cc
commit 59d0c5b26a
4 changed files with 33 additions and 28 deletions
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11
darwin/DarwinProcess.c
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@ -269,13 +269,6 @@ ERROR_A:
Process_updateCmdline(proc, k->kp_proc.p_comm, 0, strlen(k->kp_proc.p_comm));
}
// Converts ticks in the Mach "timebase" to nanoseconds.
// See `mach_timebase_info`, as used to define the `Platform_timebaseToNS` constant.
static uint64_t machTicksToNanoseconds(uint64_t schedulerTicks) {
double nanoseconds_per_mach_tick = Platform_timebaseToNS;
return (uint64_t) (nanoseconds_per_mach_tick * (double) schedulerTicks);
}
// Converts nanoseconds to hundreths of a second (centiseconds) as needed by the "time" field of the Process struct.
static long long int nanosecondsToCentiseconds(uint64_t nanoseconds) {
const uint64_t centiseconds_per_second = 100;
@ -350,8 +343,8 @@ void DarwinProcess_setFromLibprocPidinfo(DarwinProcess* proc, DarwinProcessList*
if (sizeof(pti) == proc_pidinfo(proc->super.pid, PROC_PIDTASKINFO, 0, &pti, sizeof(pti))) {
uint64_t total_existing_time_ns = proc->stime + proc->utime;
uint64_t user_time_ns = machTicksToNanoseconds(pti.pti_total_user);
uint64_t system_time_ns = machTicksToNanoseconds(pti.pti_total_system);
uint64_t user_time_ns = Platform_machTicksToNanoseconds(pti.pti_total_user);
uint64_t system_time_ns = Platform_machTicksToNanoseconds(pti.pti_total_system);
uint64_t total_current_time_ns = user_time_ns + system_time_ns;