61 lines
1.6 KiB
C++
61 lines
1.6 KiB
C++
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#include "time.h"
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#include <chrono>
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#include <windows.h>
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#include "util/logging.h"
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using namespace std::chrono;
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static bool PC_INITIALIZED = false;
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static double PC_FREQUENCY = 3000000000;
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static LARGE_INTEGER PC_START {};
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void init_performance_counter() {
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// initialize performance counter
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if (!PC_INITIALIZED) {
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// query frequency
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LARGE_INTEGER frequency {};
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if (!QueryPerformanceFrequency(&frequency) || frequency.QuadPart == 0) {
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log_warning("time", "unable to get performance counter frequency, defaulting to 3GHz");
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PC_FREQUENCY = 3000000000;
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} else {
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log_info("time", "detected performance counter frequency: {}", frequency.QuadPart);
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PC_FREQUENCY = static_cast<double>(frequency.QuadPart);
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}
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// get start frequency
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QueryPerformanceCounter(&PC_START);
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// mark as initialized
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PC_INITIALIZED = true;
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}
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}
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double get_performance_seconds() {
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if (!PC_INITIALIZED) {
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init_performance_counter();
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}
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LARGE_INTEGER time_now;
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QueryPerformanceCounter(&time_now);
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LONGLONG time_diff = time_now.QuadPart - PC_START.QuadPart;
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return static_cast<double>(time_diff) / PC_FREQUENCY;
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}
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double get_performance_milliseconds() {
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return get_performance_seconds() * 1000.0;
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}
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uint64_t get_system_seconds() {
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auto sec = duration_cast<seconds>(system_clock::now().time_since_epoch());
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return sec.count();
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}
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uint64_t get_system_milliseconds() {
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auto ms = duration_cast<milliseconds>(system_clock::now().time_since_epoch());
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return ms.count();
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}
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