From 7d3e2bd2c4cfd1296d1d6f996d7548de26540d41 Mon Sep 17 00:00:00 2001
From: Josh Haberman <haberman@google.com>
Date: Fri, 15 Feb 2013 16:27:18 -0800
Subject: Sync with 8 months of Google-internal development.

Many things have changed and been simplified.
The memory-management story for upb_def and upb_handlers
is much more robust; upb_def and upb_handlers should be
fairly stable interfaces now.  There is still much work
to do for the runtime component (upb_sink).
---
 bindings/lua/lunitx/atexit.lua | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 bindings/lua/lunitx/atexit.lua

(limited to 'bindings/lua/lunitx/atexit.lua')

diff --git a/bindings/lua/lunitx/atexit.lua b/bindings/lua/lunitx/atexit.lua
new file mode 100644
index 0000000..c3cdddc
--- /dev/null
+++ b/bindings/lua/lunitx/atexit.lua
@@ -0,0 +1,32 @@
+
+local actions = {}
+
+local atexit
+
+if _VERSION >= 'Lua 5.2' then 
+
+    atexit = function (fn)
+        actions[#actions+1] = setmetatable({}, { __gc = fn })
+    end
+    
+else
+
+    local newproxy = newproxy
+    local debug = debug
+    local assert = assert
+    local setmetatable = setmetatable
+
+    local function gc(fn)
+        local p = assert(newproxy())
+        assert(debug.setmetatable(p, { __gc = fn }))
+        return p
+    end
+
+    atexit = function (fn)
+        actions[#actions+1] = gc(fn)
+    end
+    
+end
+
+return atexit
+
-- 
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