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Merge pull request #56618 from Pineapple/uwp-qpc-tweaks

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UWP: Simplify QueryPerformanceCounter usage
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Rémi Verschelde 2022-01-08 23:40:24 +01:00 committed by GitHub
commit a489eb853d
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 5 additions and 9 deletions
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14
platform/uwp/os_uwp.cpp
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@ -136,12 +136,8 @@ void OS_UWP::initialize_core() {
NetSocketPosix::make_default();
// We need to know how often the clock is updated
if (!QueryPerformanceFrequency((LARGE_INTEGER *)&ticks_per_second))
ticks_per_second = 1000;
// If timeAtGameStart is 0 then we get the time since
// the start of the computer when we call GetGameTime()
ticks_start = 0;
ticks_start = get_ticks_usec();
QueryPerformanceFrequency((LARGE_INTEGER *)&ticks_per_second);
QueryPerformanceCounter((LARGE_INTEGER *)&ticks_start);
IPUnix::make_default();
@ -525,6 +521,9 @@ uint64_t OS_UWP::get_ticks_usec() const {
// This is the number of clock ticks since start
QueryPerformanceCounter((LARGE_INTEGER *)&ticks);
// Subtract the ticks at game start to get
// the ticks since the game started
ticks -= ticks_start;
// Divide by frequency to get the time in seconds
// original calculation shown below is subject to overflow
@ -544,9 +543,6 @@ uint64_t OS_UWP::get_ticks_usec() const {
// seconds
time += seconds * 1000000L;
// Subtract the time at game start to get
// the time since the game started
time -= ticks_start;
return time;
}