153 lines
3.8 KiB
C
153 lines
3.8 KiB
C
/*
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* SYSTEM DLL routines
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*
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* Copyright 1996 Alexandre Julliard
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*/
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#include "wine/winbase16.h"
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#include "wine/winuser16.h"
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#include "services.h"
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#include "debug.h"
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typedef struct
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{
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SYSTEMTIMERPROC callback; /* NULL if not in use */
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INT rate;
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INT ticks;
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} SYSTEM_TIMER;
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#define NB_SYS_TIMERS 8
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#define SYS_TIMER_RATE 54925
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static SYSTEM_TIMER SYS_Timers[NB_SYS_TIMERS];
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static int SYS_NbTimers = 0;
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static HANDLE SYS_Service = INVALID_HANDLE_VALUE;
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/***********************************************************************
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* SYSTEM_TimerTick
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*/
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static void CALLBACK SYSTEM_TimerTick( ULONG_PTR arg )
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{
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int i;
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for (i = 0; i < NB_SYS_TIMERS; i++)
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{
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if (!SYS_Timers[i].callback) continue;
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if ((SYS_Timers[i].ticks -= SYS_TIMER_RATE) <= 0)
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{
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SYS_Timers[i].ticks += SYS_Timers[i].rate;
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SYS_Timers[i].callback( i+1 );
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}
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}
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}
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/**********************************************************************
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* SYSTEM_StartTicks
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*
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* Start the system tick timer.
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*/
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static void SYSTEM_StartTicks(void)
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{
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if ( SYS_Service == INVALID_HANDLE_VALUE )
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SYS_Service = SERVICE_AddTimer( SYS_TIMER_RATE, SYSTEM_TimerTick, 0L );
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}
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/**********************************************************************
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* SYSTEM_StopTicks
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*
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* Stop the system tick timer.
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*/
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static void SYSTEM_StopTicks(void)
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{
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if ( SYS_Service != INVALID_HANDLE_VALUE )
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{
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SERVICE_Delete( SYS_Service );
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SYS_Service = INVALID_HANDLE_VALUE;
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}
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}
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/***********************************************************************
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* InquireSystem (SYSTEM.1)
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*
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* Note: the function always takes 2 WORD arguments, contrary to what
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* "Undocumented Windows" says.
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*/
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DWORD WINAPI InquireSystem16( WORD code, WORD arg )
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{
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WORD drivetype;
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switch(code)
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{
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case 0: /* Get timer resolution */
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return SYS_TIMER_RATE;
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case 1: /* Get drive type */
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drivetype = GetDriveType16( arg );
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return MAKELONG( drivetype, drivetype );
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case 2: /* Enable one-drive logic */
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FIXME(system, "Case %d: set single-drive %d not supported\n", code, arg );
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return 0;
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}
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WARN(system, "Unknown code %d\n", code );
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return 0;
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}
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/***********************************************************************
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* CreateSystemTimer (SYSTEM.2)
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*/
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WORD WINAPI CreateSystemTimer( WORD rate, SYSTEMTIMERPROC callback )
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{
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int i;
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for (i = 0; i < NB_SYS_TIMERS; i++)
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if (!SYS_Timers[i].callback) /* Found one */
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{
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SYS_Timers[i].rate = (UINT)rate * 1000;
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if (SYS_Timers[i].rate < SYS_TIMER_RATE)
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SYS_Timers[i].rate = SYS_TIMER_RATE;
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SYS_Timers[i].ticks = SYS_Timers[i].rate;
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SYS_Timers[i].callback = callback;
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if (++SYS_NbTimers == 1) SYSTEM_StartTicks();
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return i + 1; /* 0 means error */
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}
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return 0;
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}
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/***********************************************************************
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* KillSystemTimer (SYSTEM.3)
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*
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* Note: do not confuse this function with USER.182
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*/
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WORD WINAPI SYSTEM_KillSystemTimer( WORD timer )
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{
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if (!timer || (timer > NB_SYS_TIMERS)) return timer; /* Error */
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SYS_Timers[timer-1].callback = NULL;
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if (!--SYS_NbTimers) SYSTEM_StopTicks();
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return 0;
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}
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/***********************************************************************
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* EnableSystemTimers (SYSTEM.4)
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*/
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void WINAPI EnableSystemTimers16(void)
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{
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if ( SYS_Service != INVALID_HANDLE_VALUE )
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SERVICE_Enable( SYS_Service );
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}
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/***********************************************************************
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* DisableSystemTimers (SYSTEM.5)
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*/
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void WINAPI DisableSystemTimers16(void)
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{
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if ( SYS_Service != INVALID_HANDLE_VALUE )
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SERVICE_Disable( SYS_Service );
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}
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