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fix: timers on Linux

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On Linux the clock() function measures cpu time instead of wall time. This change uses the Apple code path for Linux.
This commit is contained in:
Simon Wiesend 2025-11-30 10:34:01 +01:00
parent c325131503
commit 4880a9d2f4
Signed by: wiesendsi102436
GPG Key ID: C18A833054142CF0
1 changed files with 11 additions and 4 deletions
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15
timer.c
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@ -1,6 +1,12 @@
#include "timer.h" #include "timer.h"
#if __APPLE__ #ifdef __linux__
// Defines strict posix compliance for CLOCK_MONOTONIC
#define _POSIX_C_SOURCE 199309L
#include <time.h>
#endif
#if __APPLE__ || __linux__
#include <sys/time.h> #include <sys/time.h>
static struct timespec start = {0, 0}; static struct timespec start = {0, 0};
@ -14,14 +20,15 @@ void startTimer()
double stopTimer() double stopTimer()
{ {
struct timespec end; struct timespec end;
clock_gettime(CLOCK_MONOTONIC, &end); clock_gettime(CLOCK_MONOTONIC, &end);
unsigned long long delta_us = (end.tv_sec - start.tv_sec) * 1000000 + (end.tv_nsec - start.tv_nsec) / 1000; unsigned long long delta_us = (end.tv_sec - start.tv_sec) * 1000000 + (end.tv_nsec - start.tv_nsec) / 1000;
double measuredSeconds = (double)delta_us / 1000000.; double measuredSeconds = (double)delta_us / 1000000.;
if(start.tv_nsec > 0) { if (start.tv_nsec > 0)
{
start.tv_nsec = 0; start.tv_nsec = 0;
start.tv_sec = 0; start.tv_sec = 0;
} }
@ -45,7 +52,7 @@ double stopTimer()
{ {
double measuredSeconds = (clock() - (double)startClocks) / CLOCKS_PER_SEC; double measuredSeconds = (clock() - (double)startClocks) / CLOCKS_PER_SEC;
if(startClocks > 0) if (startClocks > 0)
startClocks = 0; startClocks = 0;
else else
measuredSeconds = -1; measuredSeconds = -1;