/*
** Command & Conquer Red Alert(tm)
** Copyright 2025 Electronic Arts Inc.
**
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/***************************************************************************
** C O N F I D E N T I A L --- W E S T W O O D S T U D I O S **
***************************************************************************
* *
* Project Name : Temp timer for 32bit lib *
* *
* File Name : TIMERINI.CPP *
* *
* Programmer : Scott K. Bowen *
* *
* Start Date : July 6, 1994 *
* *
* Last Update : July 6, 1994 [SKB] *
* *
*-------------------------------------------------------------------------*
* Functions: *
* Init_Timer_System -- Initialize the WW timer system. *
* Remove_Timer_System -- Removes the timer system. *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#include <wwstd.h>
#include <mmsystem.h>
#include "timer.H"
#include <profile.h>
/////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////// Defines /////////////////////////////////////
#define COPY_FROM_MEM TRUE
/////////////////////////////////////////////////////////////////////////////////
////////////////////////////// timera.asm functions//////////////////////////////
#ifdef __cplusplus
extern "C" {
#endif
extern BOOL Install_Timer_Interrupt(VOID *bin_ptr, UINT rm_size, UINT freq, BOOL partial);
extern BOOL Remove_Timer_Interrupt(VOID);
#ifdef __cplusplus
}
#endif
/////////////////////////////////////////////////////////////////////////////////
/////////////////////////////// Global Data /////////////////////////////////////
BOOL TimerSystemOn = FALSE;
// Global timers that the library or user can count on existing.
TimerClass TickCount(BT_SYSTEM);
CountDownTimerClass CountDown(BT_SYSTEM, 0);
// Prototype for timer callback
void CALLBACK Timer_Callback ( UINT event_id, UINT res1 , DWORD user, DWORD res2, DWORD res3 );
HANDLE TimerThreadHandle = 0; //Handle of timer thread
int InTimerCallback = 0; //Flag to say if we are in a timer callback
/////////////////////////////////////////////////////////////////////////////////
/////////////////////////////////// Code ////////////////////////////////////////
/***************************************************************************
* WinTimerClass::WinTimerClass -- Initialize the WW timer system. *
* *
* *
* INPUT: UINT : user timer frequency. *
* *
* OUTPUT: *
* *
* WARNINGS: *
* *
* HISTORY: *
* 10/5/95 3:47PM : ST Created. *
*=========================================================================*/
WinTimerClass::WinTimerClass (UINT freq, BOOL partial)
{
BOOL success;
//
// Inform windows that we want a higher than normal
// timer resolution
//
#ifdef __SW_EP
timeBeginPeriod(1000/PROFILE_RATE);
Frequency = PROFILE_RATE;
#else
timeBeginPeriod ( 1000/freq );
Frequency = freq;
#endif
//
// Install the timer callback event handler
//
TimerHandle = timeSetEvent ( 1000/freq , 1 , Timer_Callback , 0 , TIME_PERIODIC);
TimerSystemOn = success = ( TimerHandle !=0 );
if (success) {
if (!partial) {
WindowsTimer=this;
TickCount.Start();
}
}else{
char error_str [128];
sprintf (error_str, "Error - timer system failed to start. Error code %d\n", GetLastError());
OutputDebugString(error_str);
}
}
/***************************************************************************
* WinTimerClass::~WinTimerClass -- Removes the timer system. *
* *
* *
* INPUT: NONE. *
* *
* OUTPUT: BOOL was it removed successfuly *
* *
* WARNINGS: *
* *
* HISTORY: *
* 10/5/95 3:47PM : ST Created. *
*=========================================================================*/
WinTimerClass::~WinTimerClass( void )
{
if ( TimerHandle ){
timeKillEvent ( TimerHandle );
}
TimerSystemOn = FALSE;
timeEndPeriod ( 1000/Frequency );
}
/***********************************************************************************************
* Timer_Callback -- Main timer callback. Equivalent to a timer interrupt handler *
* *
* *
* *
* INPUT: uint timer ID *
* uint reserved *
* long 0 (application defined) *
* long reserved *
* long reserved *
* *
* OUTPUT: Nothing *
* *
* WARNINGS: None *
* *
* HISTORY: *
* 10/5/95 3:19PM ST : Created *
*=============================================================================================*/
void CALLBACK Timer_Callback (UINT , UINT , DWORD , DWORD , DWORD)
{
//CONTEXT context;
InTimerCallback++;
if (!TimerThreadHandle){
DuplicateHandle (GetCurrentProcess(), GetCurrentThread() , GetCurrentProcess() ,&TimerThreadHandle , 0 , TRUE , DUPLICATE_SAME_ACCESS);
}
if (WindowsTimer) {
WindowsTimer->Update_Tick_Count();
}
InTimerCallback--;
}
/***********************************************************************************************
* WinTimerClass::Update_Tick_Count -- update westwood timers *
* *
* *
* *
* INPUT: Nothing *
* *
* OUTPUT: Nothing *
* *
* WARNINGS: None *
* *
* HISTORY: *
* 10/5/95 3:58PM ST : Created *
*=============================================================================================*/
void WinTimerClass::Update_Tick_Count ( void )
{
/*
*
* Increment westwood timers
*
*/
SysTicks++;
UserTicks++;
}
/*
;***************************************************************************
;* GET_NUM_INTERRUPTS -- Returns the number of interrupts that have occured*
;* *
;* INPUT: TRUE - returns num RM ints. *
;* FALSE - return num PM ints. *
;* *
;* OUTPUT: *
;* *
;* WARNINGS: *
;* *
;* HISTORY: *
;* 07/12/1994 SKB : Created. *
;*=========================================================================*
PROC Get_Num_Interrupts C Near
USES esi
ARG realmode:DWORD
mov esi,[RealModePtr]
cmp [realmode],0
je ??prot_mode
mov eax,[(TimerType PTR esi).NumRMInts]
ret
??prot_mode:
mov eax,[(TimerType PTR esi).NumPMInts]
ret
ENDP
*/
/***********************************************************************************************
* WinTimerClass::Get_System_Tick_Count -- returns the system tick count *
* *
* INPUT: Nothing *
* *
* OUTPUT: tick count *
* *
* WARNINGS: None *
* *
* HISTORY: *
* 10/5/95 4:02PM ST : Created *
*=============================================================================================*/
unsigned WinTimerClass::Get_System_Tick_Count ( void )
{
return ( SysTicks );
}
/***********************************************************************************************
* WinTimerClass::Get_User_Tick_Count -- returns the user tick count *
* *
* INPUT: Nothing *
* *
* OUTPUT: tick count *
* *
* WARNINGS: None *
* *
* HISTORY: *
* 10/5/95 4:02PM ST : Created *
*=============================================================================================*/
unsigned WinTimerClass::Get_User_Tick_Count ( void )
{
return ( UserTicks );
}