From 69b91a951b0dbe3b7b21e672837acdaacd6916a6 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Mon, 14 Nov 2022 09:59:09 -0800
Subject: [PATCH] pkg/objc: autorelease pools

---
 pkg/objc/autorelease.zig | 16 ++++++++++++++++
 pkg/objc/main.zig        |  1 +
 2 files changed, 17 insertions(+)
 create mode 100644 pkg/objc/autorelease.zig

diff --git a/pkg/objc/autorelease.zig b/pkg/objc/autorelease.zig
new file mode 100644
index 000000000..18adf1433
--- /dev/null
+++ b/pkg/objc/autorelease.zig
@@ -0,0 +1,16 @@
+const std = @import("std");
+
+pub const AutoreleasePool = opaque {
+    pub inline fn init() *AutoreleasePool {
+        return @ptrCast(*AutoreleasePool, objc_autoreleasePoolPush().?);
+    }
+
+    pub inline fn deinit(self: *AutoreleasePool) void {
+        objc_autoreleasePoolPop(self);
+    }
+};
+
+// I'm not sure if these are internal or not... they aren't in any headers,
+// but its how autorelease pools are implemented.
+extern "c" fn objc_autoreleasePoolPush() ?*anyopaque;
+extern "c" fn objc_autoreleasePoolPop(?*anyopaque) void;
diff --git a/pkg/objc/main.zig b/pkg/objc/main.zig
index 9d1da6847..fe18b06ed 100644
--- a/pkg/objc/main.zig
+++ b/pkg/objc/main.zig
@@ -1,6 +1,7 @@
 const std = @import("std");
 
 pub const c = @import("c.zig");
+pub usingnamespace @import("autorelease.zig");
 pub usingnamespace @import("class.zig");
 pub usingnamespace @import("object.zig");
 pub usingnamespace @import("property.zig");