mirrors/SFML
1
0
Fork 0
mirror of https://github.com/SFML/SFML.git synced 2024-11-28 22:31:09 +08:00
Code Issues Packages Projects Releases Wiki Activity

Update SFML Time classes to C++17

Browse Source 
Ensure Clock uses a monotonic clock

Statically assert against low precision clocks

Allow suspend-aware clock for Android

Add descriptive documentation to sf::Clock
This commit is contained in:
Pawel Paruzel 2021-12-06 15:49:05 +01:00 committed by Vittorio Romeo
parent e9e353a7b2
commit dfff93fe04
13 changed files with 146 additions and 461 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
CMakeLists.txt
View File

@ -105,6 +105,11 @@ endif()
# Android options # Android options
if(SFML_OS_ANDROID) if(SFML_OS_ANDROID)
sfml_set_option(SFML_ANDROID_USE_SUSPEND_AWARE_CLOCK FALSE BOOL "TRUE to use an sf::Clock implementation which takes system sleep time into account (keeps advancing during suspension), FALSE to default to another available monotonic clock")
if (SFML_ANDROID_USE_SUSPEND_AWARE_CLOCK)
add_definitions(-DSFML_ANDROID_USE_SUSPEND_AWARE_CLOCK)
endif()
# avoid missing libraries when building SFML for Android with NDK r19c and later # avoid missing libraries when building SFML for Android with NDK r19c and later
set(CMAKE_FIND_ROOT_PATH "${PROJECT_SOURCE_DIR};${CMAKE_FIND_ROOT_PATH}") set(CMAKE_FIND_ROOT_PATH "${PROJECT_SOURCE_DIR};${CMAKE_FIND_ROOT_PATH}")

65
include/SFML/System/Clock.hpp
View File

@ -30,10 +30,56 @@
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
#include <SFML/System/Export.hpp> #include <SFML/System/Export.hpp>
#include <SFML/System/Time.hpp> #include <SFML/System/Time.hpp>
#include <chrono>
#include <ratio>
#include <type_traits>
#ifdef SFML_SYSTEM_ANDROID
#include <SFML/System/SuspendAwareClock.hpp>
#endif
namespace sf namespace sf
{ {
namespace priv
{
////////////////////////////////////////////////////////////
/// \brief Chooses a monotonic clock of highest resolution
///
/// The high_resolution_clock is usually an alias for other
/// clocks: steady_clock or system_clock, whichever has a
/// higher precision.
///
/// sf::Clock, however, is aimed towards monotonic time
/// measurements and so system_clock could never be a choice
/// as its subject to discontinuous jumps in the system time
/// (e.g., if the system administrator manually changes
/// the clock), and by the incremental adjustments performed
/// by `adjtime` and Network Time Protocol. On the other
/// hand, monotonic clocks are unaffected by this behavior.
///
/// Note: Linux implementation of a monotonic clock that
/// takes sleep time into account is represented by
/// CLOCK_BOOTTIME. Android devices can define the macro:
/// SFML_ANDROID_USE_SUSPEND_AWARE_CLOCK to use a separate
/// implementation of that clock, instead.
///
/// For more information on Linux clocks visit:
/// https://linux.die.net/man/2/clock_gettime
///
////////////////////////////////////////////////////////////
#if defined(SFML_SYSTEM_ANDROID) && defined(SFML_ANDROID_USE_SUSPEND_AWARE_CLOCK)
using MostSuitableClock = SuspendAwareClock;
#else
using MostSuitableClock = std::conditional_t<
std::chrono::high_resolution_clock::is_steady,
std::chrono::high_resolution_clock,
std::chrono::steady_clock>;
#endif
} // namespace priv
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
/// \brief Utility class that measures the elapsed time /// \brief Utility class that measures the elapsed time
/// ///
@ -74,11 +120,28 @@ public:
Time restart(); Time restart();
private: private:
using ClockImpl = priv::MostSuitableClock;
static_assert(ClockImpl::is_steady,
"Provided implementation is not a monotonic clock");
static_assert(std::ratio_less_equal<ClockImpl::period, std::micro>::value,
"Clock resolution is too low. Expecting at least a microsecond precision");
////////////////////////////////////////////////////////////
/// \brief Convert clock duration to Time
///
/// This function acts as a utility for converting clock
/// duration type instance into sf::Time
///
/// \return Time instance
///
////////////////////////////////////////////////////////////
static Time durationToTime(ClockImpl::duration duration);
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
// Member data // Member data
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
Time m_startTime; //!< Time of last reset, in microseconds ClockImpl::time_point m_startTime; //!< Time of last reset
}; };
} // namespace sf } // namespace sf

57
src/SFML/System/Win32/ClockImpl.hpp → include/SFML/System/SuspendAwareClock.hpp
View File

@ -22,40 +22,59 @@
// //
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
#ifndef SFML_CLOCKIMPLWIN32_HPP
#define SFML_CLOCKIMPLWIN32_HPP #ifndef SFML_SUSPENDAWARECLOCK_HPP
#define SFML_SUSPENDAWARECLOCK_HPP
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
// Headers // Headers
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
#include <SFML/Config.hpp> #include <SFML/System/Export.hpp>
#include <SFML/System/Time.hpp> #include <chrono>
#include <type_traits>
namespace sf namespace sf
{ {
namespace priv
{
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
/// \brief Windows implementation of sf::Clock /// \brief Android, chrono-compatible, suspend-aware clock
///
/// Linux steady clock is represented by CLOCK_MONOTONIC.
/// However, this implementation does not work properly for
/// long-running clocks that work in the background when the
/// system is suspended.
///
/// SuspendAwareClock uses CLOCK_BOOTTIME which is identical
/// to CLOCK_MONOTONIC, except that it also includes any time
/// that the system is suspended.
///
/// Note: In most cases, CLOCK_MONOTONIC is a better choice.
/// Make sure this implementation is required for your use case.
/// ///
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
class ClockImpl class SFML_SYSTEM_API SuspendAwareClock
{ {
public: public:
////////////////////////////////////////////////////////////
/// \brief Type traits and static members
///
/// These type traits and static members meet the requirements
/// of a Clock concept in the C++ Standard. More specifically,
/// TrivialClock requirements are met. Thus, naming convention
/// has been kept consistent to allow for extended use e.g.
/// https://en.cppreference.com/w/cpp/chrono/is_clock
///
////////////////////////////////////////////////////////////
using duration = std::chrono::nanoseconds;
using rep = duration::rep;
using period = duration::period;
using time_point = std::chrono::time_point<SuspendAwareClock, duration>;
//////////////////////////////////////////////////////////// static constexpr bool is_steady = true;
/// \brief Get the current time
/// static time_point now() noexcept;
/// \return Current time
///
////////////////////////////////////////////////////////////
static Time getCurrentTime();
}; };
} // namespace priv
} // namespace sf } // namespace sf
#endif // SFML_SUSPENDAWARECLOCK_HPP
#endif // SFML_CLOCKIMPLWIN32_HPP

31
src/SFML/System/Unix/SleepImpl.hpp → src/SFML/System/Android/SuspendAwareClock.cpp
View File

@ -22,31 +22,24 @@
// //
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
#ifndef SFML_SLEEPIMPLUNIX_HPP
#define SFML_SLEEPIMPLUNIX_HPP
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
// Headers // Headers
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
#include <SFML/Config.hpp> #include <SFML/System/SuspendAwareClock.hpp>
#include <SFML/System/Time.hpp> #include <ctime>
namespace sf namespace sf
{ {
namespace priv
{
////////////////////////////////////////////////////////////
/// \brief Unix implementation of sf::Sleep
///
/// \param time Time to sleep
///
////////////////////////////////////////////////////////////
void sleepImpl(Time time);
} // namespace priv SuspendAwareClock::time_point SuspendAwareClock::now() noexcept
{
::timespec ts;
#ifdef CLOCK_BOOTTIME
clock_gettime(CLOCK_BOOTTIME, &ts);
#else
#error "CLOCK_BOOTTIME is essential for SuspendAwareClock to work"
#endif // CLOCK_BOOTTIME
return time_point(std::chrono::seconds(ts.tv_sec) + std::chrono::nanoseconds(ts.tv_nsec));
}
} // namespace sf } // namespace sf
#endif // SFML_SLEEPIMPLUNIX_HPP

36
src/SFML/System/CMakeLists.txt
View File

@ -29,38 +29,22 @@ set(SRC
${INCROOT}/FileInputStream.hpp ${INCROOT}/FileInputStream.hpp
${SRCROOT}/MemoryInputStream.cpp ${SRCROOT}/MemoryInputStream.cpp
${INCROOT}/MemoryInputStream.hpp ${INCROOT}/MemoryInputStream.hpp
${INCROOT}/SuspendAwareClock.hpp
) )
source_group("" FILES ${SRC}) source_group("" FILES ${SRC})
# add platform specific sources # add platform specific sources
if(SFML_OS_WINDOWS) if(SFML_OS_ANDROID)
set(PLATFORM_SRC set(PLATFORM_SRC ${PLATFORM_SRC}
${SRCROOT}/Win32/ClockImpl.cpp ${SRCROOT}/Android/Activity.hpp
${SRCROOT}/Win32/ClockImpl.hpp ${SRCROOT}/Android/Activity.cpp
${SRCROOT}/Win32/SleepImpl.cpp ${SRCROOT}/Android/NativeActivity.cpp
${SRCROOT}/Win32/SleepImpl.hpp ${SRCROOT}/Android/ResourceStream.cpp
${SRCROOT}/Android/ResourceStream.cpp
${SRCROOT}/Android/SuspendAwareClock.cpp
) )
source_group("windows" FILES ${PLATFORM_SRC})
else()
set(PLATFORM_SRC
${SRCROOT}/Unix/ClockImpl.cpp
${SRCROOT}/Unix/ClockImpl.hpp
${SRCROOT}/Unix/SleepImpl.cpp
${SRCROOT}/Unix/SleepImpl.hpp
)
if(SFML_OS_ANDROID)
set(PLATFORM_SRC ${PLATFORM_SRC}
${SRCROOT}/Android/Activity.hpp
${SRCROOT}/Android/Activity.cpp
${SRCROOT}/Android/NativeActivity.cpp
${SRCROOT}/Android/ResourceStream.cpp
${SRCROOT}/Android/ResourceStream.cpp
)
endif()
source_group("unix" FILES ${PLATFORM_SRC})
endif() endif()
source_group("unix" FILES ${PLATFORM_SRC})
# define the sfml-system target # define the sfml-system target
sfml_add_library(sfml-system sfml_add_library(sfml-system

23
src/SFML/System/Clock.cpp
View File

@ -27,18 +27,12 @@
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
#include <SFML/System/Clock.hpp> #include <SFML/System/Clock.hpp>
#if defined(SFML_SYSTEM_WINDOWS)
#include <SFML/System/Win32/ClockImpl.hpp>
#else
#include <SFML/System/Unix/ClockImpl.hpp>
#endif
namespace sf namespace sf
{ {
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
Clock::Clock() : Clock::Clock() :
m_startTime(priv::ClockImpl::getCurrentTime()) m_startTime(ClockImpl::now())
{ {
} }
@ -46,18 +40,27 @@ m_startTime(priv::ClockImpl::getCurrentTime())
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
Time Clock::getElapsedTime() const Time Clock::getElapsedTime() const
{ {
return priv::ClockImpl::getCurrentTime() - m_startTime; return durationToTime(ClockImpl::now() - m_startTime);
} }
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
Time Clock::restart() Time Clock::restart()
{ {
Time now = priv::ClockImpl::getCurrentTime(); const ClockImpl::time_point now = ClockImpl::now();
Time elapsed = now - m_startTime; Time elapsed = durationToTime(now - m_startTime);
m_startTime = now; m_startTime = now;
return elapsed; return elapsed;
} }
////////////////////////////////////////////////////////////
Time Clock::durationToTime(Clock::ClockImpl::duration duration)
{
using std::chrono::duration_cast;
using std::chrono::microseconds;
return sf::microseconds(duration_cast<microseconds>(duration).count());
}
} // namespace sf } // namespace sf

12
src/SFML/System/Sleep.cpp
View File

@ -26,12 +26,8 @@
// Headers // Headers
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
#include <SFML/System/Sleep.hpp> #include <SFML/System/Sleep.hpp>
#include <chrono>
#if defined(SFML_SYSTEM_WINDOWS) #include <thread>
#include <SFML/System/Win32/SleepImpl.hpp>
#else
#include <SFML/System/Unix/SleepImpl.hpp>
#endif
namespace sf namespace sf
@ -39,8 +35,8 @@ namespace sf
//////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////
void sleep(Time duration) void sleep(Time duration)
{ {
if (duration >= Time::Zero) const auto time = std::chrono::duration<Int64, std::micro>(duration.asMicroseconds());
priv::sleepImpl(duration); std::this_thread::sleep_for(time);
} }
} // namespace sf } // namespace sf

64
src/SFML/System/Unix/ClockImpl.cpp
View File

@ -1,64 +0,0 @@
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2021 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/System/Unix/ClockImpl.hpp>
#if defined(SFML_SYSTEM_MACOS) || defined(SFML_SYSTEM_IOS)
#include <mach/mach_time.h>
#else
#include <ctime>
#endif
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
Time ClockImpl::getCurrentTime()
{
#if defined(SFML_SYSTEM_MACOS) || defined(SFML_SYSTEM_IOS)
// Mac OS X specific implementation (it doesn't support clock_gettime)
static mach_timebase_info_data_t frequency = {0, 0};
if (frequency.denom == 0)
mach_timebase_info(&frequency);
Uint64 nanoseconds = mach_absolute_time() * frequency.numer / frequency.denom;
return sf::microseconds(nanoseconds / 1000);
#else
// POSIX implementation
timespec time;
clock_gettime(CLOCK_MONOTONIC, &time);
return sf::microseconds(time.tv_sec * 1000000 + time.tv_nsec / 1000);
#endif
}
} // namespace priv
} // namespace sf

61
src/SFML/System/Unix/ClockImpl.hpp
View File

@ -1,61 +0,0 @@
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2021 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
#ifndef SFML_CLOCKIMPLUNIX_HPP
#define SFML_CLOCKIMPLUNIX_HPP
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Config.hpp>
#include <SFML/System/Time.hpp>
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
/// \brief Unix implementation of sf::Clock
///
////////////////////////////////////////////////////////////
class ClockImpl
{
public:
////////////////////////////////////////////////////////////
/// \brief Get the current time
///
/// \return Current time
///
////////////////////////////////////////////////////////////
static Time getCurrentTime();
};
} // namespace priv
} // namespace sf
#endif // SFML_CLOCKIMPLUNIX_HPP

59
src/SFML/System/Unix/SleepImpl.cpp
View File

@ -1,59 +0,0 @@
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2021 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/System/Unix/SleepImpl.hpp>
#include <cerrno>
#include <ctime>
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
void sleepImpl(Time time)
{
Int64 usecs = time.asMicroseconds();
// Construct the time to wait
timespec ti;
ti.tv_nsec = static_cast<long>((usecs % 1000000) * 1000);
ti.tv_sec = static_cast<time_t>(usecs / 1000000);
// Wait...
// If nanosleep returns -1, we check errno. If it is EINTR
// nanosleep was interrupted and has set ti to the remaining
// duration. We continue sleeping until the complete duration
// has passed. We stop sleeping if it was due to an error.
while ((nanosleep(&ti, &ti) == -1) && (errno == EINTR))
{
}
}
} // namespace priv
} // namespace sf

87
src/SFML/System/Win32/ClockImpl.cpp
View File

@ -1,87 +0,0 @@
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2021 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/System/Win32/ClockImpl.hpp>
#include <mutex>
#include <windows.h>
namespace
{
LARGE_INTEGER getFrequency()
{
LARGE_INTEGER frequency;
QueryPerformanceFrequency(&frequency);
return frequency;
}
bool isWindowsXpOrOlder()
{
// Windows XP was the last 5.x version of Windows
return static_cast<DWORD>(LOBYTE(LOWORD(GetVersion()))) < 6;
}
}
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
Time ClockImpl::getCurrentTime()
{
// Calculate inverse of frequency multiplied by 1000000 to prevent overflow in final calculation
// Frequency is constant across the program lifetime
static double inverse = 1000000.0 / static_cast<double>(getFrequency().QuadPart);
// Detect if we are on Windows XP or older
static bool oldWindows = isWindowsXpOrOlder();
LARGE_INTEGER time;
if (oldWindows)
{
static std::recursive_mutex oldWindowsMutex;
// Acquire a lock (CRITICAL_SECTION) to prevent travelling back in time
std::scoped_lock lock(oldWindowsMutex);
// Get the current time
QueryPerformanceCounter(&time);
}
else
{
// Get the current time
QueryPerformanceCounter(&time);
}
// Return the current time as microseconds
return sf::microseconds(static_cast<sf::Int64>(static_cast<double>(time.QuadPart) * inverse));
}
} // namespace priv
} // namespace sf

55
src/SFML/System/Win32/SleepImpl.cpp
View File

@ -1,55 +0,0 @@
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2021 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/System/Win32/SleepImpl.hpp>
#include <windows.h>
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
void sleepImpl(Time time)
{
// Get the supported timer resolutions on this system
TIMECAPS tc;
timeGetDevCaps(&tc, sizeof(TIMECAPS));
// Set the timer resolution to the minimum for the Sleep call
timeBeginPeriod(tc.wPeriodMin);
// Wait...
::Sleep(static_cast<DWORD>(time.asMilliseconds()));
// Reset the timer resolution back to the system default
timeEndPeriod(tc.wPeriodMin);
}
} // namespace priv
} // namespace sf

52
src/SFML/System/Win32/SleepImpl.hpp
View File

@ -1,52 +0,0 @@
////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2021 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
#ifndef SFML_SLEEPIMPLWIN32_HPP
#define SFML_SLEEPIMPLWIN32_HPP
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Config.hpp>
#include <SFML/System/Time.hpp>
namespace sf
{
namespace priv
{
////////////////////////////////////////////////////////////
/// \brief Windows implementation of sf::Sleep
///
/// \param time Time to sleep
///
////////////////////////////////////////////////////////////
void sleepImpl(Time time);
} // namespace priv
} // namespace sf
#endif // SFML_SLEEPIMPLWIN32_HPP