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sceKernelGettimeofday: replace chrono by win32 api. Better performance

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bb uses this function too much. Consuming almost 30% of cpu time
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Vinicius Rangel 2024-09-21 22:13:10 -03:00
parent 5b7ee037ac
commit ed563e5717
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GPG key ID: A5B154D904B761D9
1 changed files with 13 additions and 6 deletions
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19
src/core/libraries/kernel/time_management.cpp
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@ -147,13 +147,20 @@ int PS4_SYSV_ABI sceKernelGettimeofday(OrbisKernelTimeval* tp) {
}
#ifdef _WIN64
auto now = std::chrono::system_clock::now();
auto duration = now.time_since_epoch();
auto seconds = std::chrono::duration_cast<std::chrono::seconds>(duration);
auto microsecs = std::chrono::duration_cast<std::chrono::microseconds>(duration - seconds);
FILETIME filetime;
GetSystemTimeAsFileTime(&filetime);
tp->tv_sec = seconds.count();
tp->tv_usec = microsecs.count();
constexpr u64 UNIX_TIME_START = 0x295E9648864000;
constexpr u64 TICKS_PER_SECOND = 1000000;
u64 ticks = filetime.dwHighDateTime;
ticks <<= 32;
ticks |= filetime.dwLowDateTime;
ticks /= 10;
ticks -= UNIX_TIME_START;
tp->tv_sec = ticks / TICKS_PER_SECOND;
tp->tv_usec = ticks % TICKS_PER_SECOND;
#else
timeval tv;
gettimeofday(&tv, nullptr);