Initial commit of Command & Conquer Renegade source code.

Code/wwlib/systimer.h

@@ -0,0 +1,138 @@
+/*
+**	Command & Conquer Renegade(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/>.
+*/
+
+/***********************************************************************************************
+ ***                            Confidential - Westwood Studios                              ***
+ ***********************************************************************************************
+ *                                                                                             *
+ *                 Project Name : Commando                                                     *
+ *                                                                                             *
+ *                     $Archive:: /Commando/Code/wwlib/systimer.h                             $*
+ *                                                                                             *
+ *                      $Author:: Steve_t                                                     $*
+ *                                                                                             *
+ *                     $Modtime:: 12/09/01 6:41p                                              $*
+ *                                                                                             *
+ *                    $Revision:: 2                                                           $*
+ *                                                                                             *
+ *---------------------------------------------------------------------------------------------*
+ * Functions:                                                                                  *
+ * - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
+
+#pragma once
+#ifndef _SYSTIMER_H
+
+#include "always.h"
+#include <windows.h>
+#include "mmsys.h"
+
+#define TIMEGETTIME SystemTime.Get
+
+/*
+** Class that just wraps around timeGetTime()
+**
+**
+*/
+class SysTimeClass
+{
+
+	public:
+
+		/*
+		** Get. Use everywhere you would use timeGetTime
+		*/
+		__forceinline unsigned long Get(void);
+		__forceinline unsigned long operator () (void) {return(Get());}
+		__forceinline operator unsigned long(void) {return(Get());}
+
+		/*
+		** Use periodically (like every few days!) to make sure the timer doesn't wrap.
+		*/
+		void Reset(void);
+
+		/*
+		** See if the timer is about to wrap.
+		*/
+		bool Is_Getting_Late(void);
+
+	private:
+
+		/*
+		** Time we were first called.
+		*/
+		unsigned long StartTime;
+
+		/*
+		** Time to add after timer wraps.
+		*/
+		unsigned long WrapAdd;
+
+};
+
+extern SysTimeClass SystemTime;
+
+
+/***********************************************************************************************
+ * SysTimeClass::Get -- Wrapper around system timeGetTime() api call                           *
+ *                                                                                             *
+ *                                                                                             *
+ *                                                                                             *
+ * INPUT:    Nothing                                                                           *
+ *                                                                                             *
+ * OUTPUT:   Current system time in ms                                                         *
+ *                                                                                             *
+ * WARNINGS: None                                                                              *
+ *                                                                                             *
+ * HISTORY:                                                                                    *
+ *   10/25/2001 1:38PM ST : Created                                                            *
+ *=============================================================================================*/
+__forceinline unsigned long SysTimeClass::Get(void)
+{
+	/*
+	** This has to be static here since we don't know if we will get called in a global constructor of another object before our
+	** constructor gets called. In fact, we don't even have a constructor because it's pointless.
+	*/
+	static bool is_init = false;
+
+	if (!is_init) {
+		Reset();
+		is_init = true;
+	}
+
+	unsigned long time = timeGetTime();
+	if (time > StartTime) {
+		return(time - StartTime);
+	}
+
+	/*
+	** Timer wrapped around. Eeek.
+	*/
+	return(time + WrapAdd);
+}
+
+
+
+#ifdef timeGetTime
+#undef timeGetTime
+#define timeGetTime SystemTime.Get
+#endif //timeGetTime
+
+
+
+
+#endif //_SYSTIMER_H