Count death and co-op respawn delays in game ticks

source/main/main.c

@@ -700,6 +700,9 @@ static char const *scenario_paths[10] =
 };
 
 static struct _main_globals main_globals = { 0 };
+/* Keep the original globals layout; these clocks belong to pending requests. */
+static long main_loss_last_tick;
+static long main_respawn_last_tick;
 boolean debug_force_frame_rate_update = FALSE;
 boolean debug_no_drawing = FALSE;
 boolean debug_game_save = FALSE;
@@ -903,6 +906,11 @@ void main_won_map(
 void main_lost_map(
 	void)
 {
+	if (!main_globals.lost_map)
+	{
+		main_globals.loss_timer = 0;
+		main_loss_last_tick = game_time_get();
+	}
 	main_globals.saving_map = FALSE;
 	main_globals.lost_map = TRUE;
 	return;
@@ -963,9 +971,14 @@ void main_save_map_nonsafe(
 void main_respawn(
 	boolean in_multiplayer)
 {
+	if (!main_globals.respawn)
+	{
+		main_globals.respawn_timer = 0;
+		main_respawn_last_tick = game_time_get();
+	}
 	main_globals.respawn = TRUE;
 	if (in_multiplayer)
-		main_globals.respawn_timer = 91;
+		main_globals.respawn_timer = 92;
 	return;
 }
 
@@ -1944,17 +1957,45 @@ static void main_switch_to_structure_bsp_private(
 	return;
 }
 
+/* The original post-increment test expires on its 92nd 30 Hz update.
+   Render-only frames must not advance it. Saturate so blocked co-op
+   respawns can retry indefinitely without overflowing the short counter. */
+static boolean main_death_timer_expired(
+	short *timer,
+	long *last_tick,
+	boolean advance)
+{
+	long current_tick = game_time_get();
+	unsigned long elapsed_ticks = 0;
+
+	if (current_tick < *last_tick)
+	{
+		/* A checkpoint/core load can move the simulation clock backwards. */
+		*timer = 0;
+	}
+	else
+	{
+		elapsed_ticks = (unsigned long)current_tick - (unsigned long)*last_tick;
+	}
+	*last_tick = current_tick;
+
+	if (!advance)
+		return FALSE;
+
+	*timer = (short)MIN(92, (unsigned long)*timer + elapsed_ticks);
+	return *timer >= 92;
+}
+
 static void main_lost_map_private(
 	void)
 {
-	if (!game_time_get_paused())
+	if (main_death_timer_expired(
+		&main_globals.loss_timer, &main_loss_last_tick,
+		!game_time_get_paused()))
 	{
-		if (main_globals.loss_timer++ > 90)
-		{
-			main_globals.lost_map = FALSE;
-			main_globals.loss_timer = 0;
-			game_state_revert();
-		}
+		main_globals.lost_map = FALSE;
+		main_globals.loss_timer = 0;
+		game_state_revert();
 	}
 	return;
 }
@@ -1962,13 +2003,13 @@ static void main_lost_map_private(
 static void main_respawn_private(
 	void)
 {
-	if (!game_time_get_paused() && !cinematic_in_progress())
+	if (main_death_timer_expired(
+		&main_globals.respawn_timer, &main_respawn_last_tick,
+		!game_time_get_paused() && !cinematic_in_progress()) &&
+		players_respawn_coop())
 	{
-		if (main_globals.respawn_timer++ > 90 && players_respawn_coop())
-		{
-			main_globals.respawn = FALSE;
-			main_globals.respawn_timer = 0;
-		}
+		main_globals.respawn = FALSE;
+		main_globals.respawn_timer = 0;
 	}
 	return;
 }