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Introduce ElapsedTime class

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This commit is contained in:
Alexander Karatarakis 2017-02-16 16:29:52 -08:00
parent 8a37cd9b1d
commit a62558fb79
2 changed files with 78 additions and 45 deletions
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19
toolsrc/include/Stopwatch.h
View File

@ -5,6 +5,25 @@
namespace vcpkg
{
class ElapsedTime
{
public:
static ElapsedTime createStarted();
constexpr ElapsedTime() :m_startTick() {}
template <class TimeUnit>
TimeUnit elapsed() const
{
return std::chrono::duration_cast<TimeUnit>(std::chrono::high_resolution_clock::now() - this->m_startTick);
}
std::string toString() const;
private:
std::chrono::steady_clock::time_point m_startTick;
};
class Stopwatch
{
public:

104
toolsrc/src/Stopwatch.cpp
View File

@ -4,6 +4,63 @@
namespace vcpkg
{
static std::string format_time_userfriendly(const std::chrono::nanoseconds& nanos)
{
using std::chrono::hours;
using std::chrono::minutes;
using std::chrono::seconds;
using std::chrono::milliseconds;
using std::chrono::microseconds;
using std::chrono::nanoseconds;
using std::chrono::duration_cast;
const double nanos_as_double = static_cast<double>(nanos.count());
if (duration_cast<hours>(nanos) > hours())
{
auto t = nanos_as_double / duration_cast<nanoseconds>(hours(1)).count();
return Strings::format("%.4g h", t);
}
if (duration_cast<minutes>(nanos) > minutes())
{
auto t = nanos_as_double / duration_cast<nanoseconds>(minutes(1)).count();
return Strings::format("%.4g min", t);
}
if (duration_cast<seconds>(nanos) > seconds())
{
auto t = nanos_as_double / duration_cast<nanoseconds>(seconds(1)).count();
return Strings::format("%.4g s", t);
}
if (duration_cast<milliseconds>(nanos) > milliseconds())
{
auto t = nanos_as_double / duration_cast<nanoseconds>(milliseconds(1)).count();
return Strings::format("%.4g ms", t);
}
if (duration_cast<microseconds>(nanos) > microseconds())
{
auto t = nanos_as_double / duration_cast<nanoseconds>(microseconds(1)).count();
return Strings::format("%.4g us", t);
}
return Strings::format("%.4g ns", nanos_as_double);
}
ElapsedTime ElapsedTime::createStarted()
{
ElapsedTime t;
t.m_startTick = std::chrono::high_resolution_clock::now();
return t;
}
std::string ElapsedTime::toString() const
{
return format_time_userfriendly(elapsed<std::chrono::nanoseconds>());
}
Stopwatch Stopwatch::createUnstarted()
{
return Stopwatch();
@ -45,53 +102,10 @@ namespace vcpkg
std::string Stopwatch::toString() const
{
using std::chrono::hours;
using std::chrono::minutes;
using std::chrono::seconds;
using std::chrono::milliseconds;
using std::chrono::microseconds;
using std::chrono::nanoseconds;
using std::chrono::duration_cast;
auto nanos = elapsedNanos();
auto nanos_as_double = static_cast<double>(nanos.count());
if (duration_cast<hours>(nanos) > hours())
{
auto t = nanos_as_double / duration_cast<nanoseconds>(hours(1)).count();
return Strings::format("%.4g h", t);
}
if (duration_cast<minutes>(nanos) > minutes())
{
auto t = nanos_as_double / duration_cast<nanoseconds>(minutes(1)).count();
return Strings::format("%.4g min", t);
}
if (duration_cast<seconds>(nanos) > seconds())
{
auto t = nanos_as_double / duration_cast<nanoseconds>(seconds(1)).count();
return Strings::format("%.4g s", t);
}
if (duration_cast<milliseconds>(nanos) > milliseconds())
{
auto t = nanos_as_double / duration_cast<nanoseconds>(milliseconds(1)).count();
return Strings::format("%.4g ms", t);
}
if (duration_cast<microseconds>(nanos) > microseconds())
{
auto t = nanos_as_double / duration_cast<nanoseconds>(microseconds(1)).count();
return Strings::format("%.4g us", t);
}
return Strings::format("%.4g ns", nanos_as_double);
return format_time_userfriendly(this->elapsedNanos());
}
Stopwatch::Stopwatch() : m_isRunning(false), m_elapsedNanos(0), m_startTick()
{
}
Stopwatch::Stopwatch() : m_isRunning(false), m_elapsedNanos(0), m_startTick() { }
std::chrono::nanoseconds Stopwatch::elapsedNanos() const
{