From 5a079a2d114f96d4847d1ee305d5b7c16eeec50e Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 27 Dec 2025 12:03:39 -0800
Subject: Initial commit

---
 .../SDL-3.2.8/src/main/ios/SDL_sysmain_callbacks.m | 88 ++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 contrib/SDL-3.2.8/src/main/ios/SDL_sysmain_callbacks.m

(limited to 'contrib/SDL-3.2.8/src/main/ios/SDL_sysmain_callbacks.m')

diff --git a/contrib/SDL-3.2.8/src/main/ios/SDL_sysmain_callbacks.m b/contrib/SDL-3.2.8/src/main/ios/SDL_sysmain_callbacks.m
new file mode 100644
index 0000000..becbda2
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/main/ios/SDL_sysmain_callbacks.m
@@ -0,0 +1,88 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+#include "../SDL_main_callbacks.h"
+
+#ifdef SDL_PLATFORM_IOS
+
+#import <UIKit/UIKit.h>
+
+#include "../../video/uikit/SDL_uikitevents.h"  // For SDL_UpdateLifecycleObserver()
+
+
+@interface SDLIosMainCallbacksDisplayLink : NSObject
+@property(nonatomic, retain) CADisplayLink *displayLink;
+- (void)appIteration:(CADisplayLink *)sender;
+- (instancetype)init:(SDL_AppIterate_func)_appiter quitfunc:(SDL_AppQuit_func)_appquit;
+@end
+
+static SDLIosMainCallbacksDisplayLink *globalDisplayLink;
+
+@implementation SDLIosMainCallbacksDisplayLink
+
+- (instancetype)init:(SDL_AppIterate_func)_appiter quitfunc:(SDL_AppQuit_func)_appquit;
+{
+    if ((self = [super init])) {
+        self.displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(appIteration:)];
+        [self.displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
+    }
+    return self;
+}
+
+- (void)appIteration:(CADisplayLink *)sender
+{
+    const SDL_AppResult rc = SDL_IterateMainCallbacks(true);
+    if (rc != SDL_APP_CONTINUE) {
+        [self.displayLink invalidate];
+        self.displayLink = nil;
+        globalDisplayLink = nil;
+        SDL_QuitMainCallbacks(rc);
+        SDL_UpdateLifecycleObserver();
+        exit((rc == SDL_APP_FAILURE) ? 1 : 0);
+    }
+}
+@end
+
+// SDL_RunApp will land in UIApplicationMain, which calls SDL_main from postFinishLaunch, which calls this.
+// When we return from here, we're living in the RunLoop, and a CADisplayLink is firing regularly for us.
+int SDL_EnterAppMainCallbacks(int argc, char* argv[], SDL_AppInit_func appinit, SDL_AppIterate_func appiter, SDL_AppEvent_func appevent, SDL_AppQuit_func appquit)
+{
+    SDL_AppResult rc = SDL_InitMainCallbacks(argc, argv, appinit, appiter, appevent, appquit);
+    if (rc == SDL_APP_CONTINUE) {
+        globalDisplayLink = [[SDLIosMainCallbacksDisplayLink alloc] init:appiter quitfunc:appquit];
+        if (globalDisplayLink == nil) {
+            rc = SDL_APP_FAILURE;
+        } else {
+            return 0;  // this will fall all the way out of SDL_main, where UIApplicationMain will keep running the RunLoop.
+        }
+    }
+
+    // appinit requested quit, just bounce out now.
+    SDL_QuitMainCallbacks(rc);
+    exit((rc == SDL_APP_FAILURE) ? 1 : 0);
+
+    return 1;  // just in case.
+}
+
+#endif
+
+
-- 
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