From ad8ffb96789f90180982b344540870a2d4e2d60b Mon Sep 17 00:00:00 2001
From: chai <chaifix@163.com>
Date: Thu, 31 May 2018 08:12:40 +0800
Subject: init

---
 3rdparty/SDL/src/timer/mint/SDL_systimer.c | 149 +++++++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 3rdparty/SDL/src/timer/mint/SDL_systimer.c

(limited to '3rdparty/SDL/src/timer/mint/SDL_systimer.c')

diff --git a/3rdparty/SDL/src/timer/mint/SDL_systimer.c b/3rdparty/SDL/src/timer/mint/SDL_systimer.c
new file mode 100644
index 0000000..01e7a41
--- /dev/null
+++ b/3rdparty/SDL/src/timer/mint/SDL_systimer.c
@@ -0,0 +1,149 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2012 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifdef SDL_TIMER_MINT
+
+/*
+ *	TOS/MiNT timer driver
+ *	based on vbl vector
+ *
+ *	Patrice Mandin
+ */
+
+#include <stdio.h>
+#include <sys/time.h>
+#include <signal.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+
+#include <mint/cookie.h>
+#include <mint/sysvars.h>
+#include <mint/osbind.h>
+#include <mint/mintbind.h>
+
+#include "SDL_timer.h"
+#include "../SDL_timer_c.h"
+#include "SDL_thread.h"
+
+#include "../../video/ataricommon/SDL_atarisuper.h"
+
+#include "SDL_vbltimer_s.h"
+
+/* from audio/mint */
+void SDL_MintAudio_CheckFpu(void);
+
+/* The first ticks value of the application */
+static Uint32 start;
+static SDL_bool read_hz200_from_vbl = SDL_FALSE;
+static int mint_present; /* can we use Syield() ? */
+
+void SDL_StartTicks(void)
+{
+	void *old_stack;
+	long dummy;
+
+	/* Set first ticks value */
+	old_stack = (void *)Super(0);
+	start = *((volatile long *)_hz_200);
+	SuperToUser(old_stack);
+
+	start *= 5;	/* One _hz_200 tic is 5ms */
+
+	mint_present = (Getcookie(C_MiNT, &dummy) == C_FOUND);
+}
+
+Uint32 SDL_GetTicks (void)
+{
+	Uint32 now = start;
+
+	if (read_hz200_from_vbl) {
+		now = SDL_Atari_hz200;
+	} else {
+		void *old_stack = (void *)Super(0);
+		now = *((volatile long *)_hz_200);
+		SuperToUser(old_stack);
+	}
+
+	return((now*5)-start);
+}
+
+void SDL_Delay (Uint32 ms)
+{
+	Uint32 now;
+
+	now = SDL_GetTicks();
+	while ((SDL_GetTicks()-now)<ms){
+		if (mint_present) {
+			Syield();
+		}
+	}
+}
+
+/* Data to handle a single periodic alarm */
+static SDL_bool timer_installed=SDL_FALSE;
+
+/* This is only called if the event thread is not running */
+int SDL_SYS_TimerInit(void)
+{
+	void *old_stack;
+
+	SDL_MintAudio_CheckFpu();
+
+	/* Install RunTimer in vbl vector */
+	old_stack = (void *)Super(0);
+	timer_installed = !SDL_AtariVblInstall(SDL_ThreadedTimerCheck);
+	SuperToUser(old_stack);
+
+	if (!timer_installed) {
+		return(-1);
+	}
+
+	read_hz200_from_vbl = SDL_TRUE;
+	return(SDL_SetTimerThreaded(0));
+}
+
+void SDL_SYS_TimerQuit(void)
+{
+	/* Uninstall RunTimer vbl vector */
+	if (timer_installed) {
+		void *old_stack = (void *)Super(0);
+		SDL_AtariVblUninstall(SDL_ThreadedTimerCheck);
+		SuperToUser(old_stack);
+		timer_installed = SDL_FALSE;
+	}
+	read_hz200_from_vbl = SDL_FALSE;
+}
+
+int SDL_SYS_StartTimer(void)
+{
+	SDL_SetError("Internal logic error: MiNT uses vbl timer");
+	return(-1);
+}
+
+void SDL_SYS_StopTimer(void)
+{
+	return;
+}
+
+#endif /* SDL_TIMER_MINT */
-- 
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