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Fix incorrect timings on macOS

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This commit is contained in:
Harold Brenes
2024-03-28 21:09:37 -04:00
parent d325c8ad23
commit b84a660806
1 changed files with 14 additions and 13 deletions
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27
src/timings.cpp
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@@ -33,22 +33,23 @@ gb_internal u64 win32_time_stamp__freq(void) {
#include <mach/mach_time.h>
gb_internal u64 osx_time_stamp_time_now(void) {
return mach_absolute_time();
}
gb_internal u64 osx_time_stamp__freq(void) {
gb_internal mach_timebase_info_data_t osx_init_timebase_info(void) {
mach_timebase_info_data_t data;
data.numer = 0;
data.denom = 0;
mach_timebase_info(&data);
#if defined(GB_CPU_ARM)
// NOTE(bill, 2021-02-25): M1 Chip seems to have a different freq count
// TODO(bill): Is this truly correct?
return (1000000llu * cast(u64)data.numer) / cast(u64)data.denom;
#else
return (1000000000llu * cast(u64)data.numer) / cast(u64)data.denom;
#endif
kern_return_t r = mach_timebase_info(&data);
GB_ASSERT(r == KERN_SUCCESS);
return data;
}
gb_internal u64 osx_time_stamp_time_now(void) {
gb_local_persist mach_timebase_info_data_t data = osx_init_timebase_info();
return (mach_absolute_time() * cast(u64)data.numer) / cast(u64)data.denom; // Effectively converts to nanoseconds
}
gb_internal u64 osx_time_stamp__freq(void) {
return 1000000000ull; // Nanoseconds to seconds
}
#elif defined(GB_SYSTEM_UNIX)