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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 #endif
#if XASH_WIN32 #if XASH_WIN32
void Win32_Init( void ); void Win32_Init( qboolean con_showalways );
void Win32_Shutdown( void ); void Win32_Shutdown( void );
qboolean Win32_NanoSleep( int nsec );
void Wcon_CreateConsole( qboolean con_showalways ); void Wcon_CreateConsole( qboolean con_showalways );
void Wcon_DestroyConsole( void ); void Wcon_DestroyConsole( void );
void Wcon_InitConsoleCommands( void ); void Wcon_InitConsoleCommands( void );
@ -126,8 +127,7 @@ static inline void Platform_Init( qboolean con_showalways, const char *basedir )
#elif XASH_DOS #elif XASH_DOS
DOS_Init( ); DOS_Init( );
#elif XASH_WIN32 #elif XASH_WIN32
Win32_Init( ); Win32_Init( con_showalways );
Wcon_CreateConsole( con_showalways );
#elif XASH_LINUX #elif XASH_LINUX
Linux_Init( ); Linux_Init( );
#endif #endif
@ -142,7 +142,6 @@ static inline void Platform_Shutdown( void )
#elif XASH_DOS #elif XASH_DOS
DOS_Shutdown( ); DOS_Shutdown( );
#elif XASH_WIN32 #elif XASH_WIN32
Wcon_DestroyConsole( );
Win32_Shutdown( ); Win32_Shutdown( );
#elif XASH_LINUX #elif XASH_LINUX
Linux_Shutdown( ); Linux_Shutdown( );
@ -193,23 +192,9 @@ static inline qboolean Platform_NanoSleep( int nsec )
}; };
return nanosleep( &ts, NULL ) == 0; return nanosleep( &ts, NULL ) == 0;
#elif XASH_WIN32 #elif XASH_WIN32
extern HANDLE g_waitable_timer; return Win32_NanoSleep( nsec );
const LARGE_INTEGER ts = { -nsec }; #else
return false;
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;
#endif #endif
} }

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

@ -38,31 +38,63 @@ double Platform_DoubleTime( void )
} }
#endif // XASH_TIMER == TIMER_WIN32 #endif // XASH_TIMER == TIMER_WIN32
void Win32_Init( void ) void Win32_Init( qboolean con_showalways )
{ {
HMODULE hModule = LoadLibrary( "kernel32.dll" ); HMODULE hModule = LoadLibrary( "kernel32.dll" );
if( hModule ) if( hModule )
{ {
HANDLE ( __stdcall *pfnCreateWaitableTimerExW)( LPSECURITY_ATTRIBUTES lpTimerAttributes, LPCWSTR lpTimerName, DWORD dwFlags, DWORD dwDesiredAccess ); 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(
g_waitable_timer = pfnCreateWaitableTimerExW( NULL, NULL, 0x1 | 0x2, 0 ); 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 ) if( !g_waitable_timer )
g_waitable_timer = CreateWaitableTimer( NULL, TRUE, NULL ); g_waitable_timer = CreateWaitableTimer( NULL, TRUE, NULL );
#endif
Wcon_CreateConsole( con_showalways );
} }
void Win32_Shutdown( void ) void Win32_Shutdown( void )
{ {
Wcon_DestroyConsole( );
if( g_waitable_timer ) if( g_waitable_timer )
{
CloseHandle( 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 ) qboolean Platform_DebuggerPresent( void )