port: add extra sleep calls to busy loops; separate sleep into system.c

src/game/timing.c

@@ -4,6 +4,9 @@
 #include "bss.h"
 #include "data.h"
 #include "types.h"
+#ifndef PLATFORM_N64
+#include "system.h"
+#endif
 
 void frametimeInit(void)
 {
@@ -41,6 +44,12 @@ void frametimeCalculate(void)
 
 		diffframe60 = (g_Vars.lostframetime60t + diffframet + CYCLES_PER_FRAME / 2) / CYCLES_PER_FRAME;
 		diffframe240 = (g_Vars.lostframetime240t + diffframet + CYCLES_PER_FRAME / 2 / 4) / (CYCLES_PER_FRAME / 4);
+
+#ifndef PLATFORM_N64
+		if (g_TickExtraSleep) {
+			sysSleep(EXTRA_SLEEP_TIME);
+		}
+#endif
 	} while (g_Vars.mininc60 && diffframe60 < g_Vars.mininc60);
 
 	g_Vars.lostframetime60t = g_Vars.lostframetime60t + diffframet - diffframe60 * CYCLES_PER_FRAME;

src/include/constants.h

@@ -4722,6 +4722,8 @@ enum weaponnum {
 #define CROSSHAIR_HEALTH_ON_GREEN 1
 #define CROSSHAIR_HEALTH_ON_WHITE 2
 
+#define EXTRA_SLEEP_TIME 1000LL // 100us
+
 #endif
 
 #endif

src/include/data.h

@@ -547,6 +547,7 @@ extern s32 g_BlurFb;
 extern s32 g_BlurFbCapTimer;
 extern bool g_BlurFbDirty;
 extern s32 g_TickRateDiv;
+extern s32 g_TickExtraSleep;
 extern s32 g_MusicDisableMpDeath;
 extern s32 g_BgunGeMuzzleFlashes;
 extern s32 g_FileAutoSelect;