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engine: platform: win32: implement nanosleep using waitable timers with high precision

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This commit is contained in:
Alibek Omarov 2025-02-15 11:57:37 +03:00
parent 052ea6a8bd
commit af6b434b71
2 changed files with 44 additions and 27 deletions
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27
engine/platform/platform.h
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@ -70,8 +70,9 @@ void Android_Shutdown( void );
#endif
#if XASH_WIN32
void Win32_Init( void );
void Win32_Init( qboolean con_showalways );
void Win32_Shutdown( void );
qboolean Win32_NanoSleep( int nsec );
void Wcon_CreateConsole( qboolean con_showalways );
void Wcon_DestroyConsole( void );
void Wcon_InitConsoleCommands( void );
@ -126,8 +127,7 @@ static inline void Platform_Init( qboolean con_showalways, const char *basedir )
#elif XASH_DOS
DOS_Init( );
#elif XASH_WIN32
Win32_Init( );
Wcon_CreateConsole( con_showalways );
Win32_Init( con_showalways );
#elif XASH_LINUX
Linux_Init( );
#endif
@ -142,7 +142,6 @@ static inline void Platform_Shutdown( void )
#elif XASH_DOS
DOS_Shutdown( );
#elif XASH_WIN32
Wcon_DestroyConsole( );
Win32_Shutdown( );
#elif XASH_LINUX
Linux_Shutdown( );
@ -193,23 +192,9 @@ static inline qboolean Platform_NanoSleep( int nsec )
};
return nanosleep( &ts, NULL ) == 0;
#elif XASH_WIN32
extern HANDLE g_waitable_timer;
const LARGE_INTEGER ts = { -nsec };
if( !g_waitable_timer )
return false;
if( !SetWaitableTimer( g_waitable_timer, &ts, 0, NULL, NULL, FALSE ))
{
CloseHandle( g_waitable_timer );
g_waitable_timer = 0;
return false;
}
if( WaitForSingleObject( g_waitable_timer, 1000 ) != WAIT_OBJECT_0 )
return false;
return true;
return Win32_NanoSleep( nsec );
#else
return false;
#endif
}

44
engine/platform/win32/sys_win.c
View file

@ -38,31 +38,63 @@ double Platform_DoubleTime( void )
}
#endif // XASH_TIMER == TIMER_WIN32
void Win32_Init( void )
void Win32_Init( qboolean con_showalways )
{
HMODULE hModule = LoadLibrary( "kernel32.dll" );
if( hModule )
{
HANDLE ( __stdcall *pfnCreateWaitableTimerExW)( LPSECURITY_ATTRIBUTES lpTimerAttributes, LPCWSTR lpTimerName, DWORD dwFlags, DWORD dwDesiredAccess );
if(( pfnCreateWaitableTimerExW = GetProcAddress( hModule, "CreateWaitableTimerExW" )))
if(( pfnCreateWaitableTimerExW = (void *)GetProcAddress( hModule, "CreateWaitableTimerExW" )))
{
// CREATE_WAITABLE_TIMER_MANUAL_RESET | CREATE_WAITABLE_TIMER_HIGH_RESOLUTION
g_waitable_timer = pfnCreateWaitableTimerExW( NULL, NULL, 0x1 | 0x2, 0 );
g_waitable_timer = pfnCreateWaitableTimerExW(
NULL,
NULL,
0x1 /* CREATE_WAITABLE_TIMER_MANUAL_RESET */ | 0x2 /* CREATE_WAITABLE_TIMER_HIGH_RESOLUTION */,
0x0002 /* TIMER_MODIFY_STATE */ | SYNCHRONIZE | DELETE
);
}
FreeLibrary( "kernel32.dll" );
FreeLibrary( hModule );
}
#if 0 // FIXME: creates object but doesn't wait for specific time for me on Windows 10, with the code above commented
if( !g_waitable_timer )
g_waitable_timer = CreateWaitableTimer( NULL, TRUE, NULL );
#endif
Wcon_CreateConsole( con_showalways );
}
void Win32_Shutdown( void )
{
Wcon_DestroyConsole( );
if( g_waitable_timer )
{
CloseHandle( g_waitable_timer );
g_waitable_timer = 0;
}
}
qboolean Win32_NanoSleep( int nsec )
{
const LARGE_INTEGER ts = { -nsec };
if( !g_waitable_timer )
return false;
if( !SetWaitableTimer( g_waitable_timer, &ts, 0, NULL, NULL, FALSE ))
{
CloseHandle( g_waitable_timer );
g_waitable_timer = 0;
return false;
}
if( WaitForSingleObject( g_waitable_timer, Q_max( 1, nsec / 1000000 )) != WAIT_OBJECT_0 )
return false;
return true;
}
qboolean Platform_DebuggerPresent( void )