From 9998978f1bc0c0aafeac29dd7adf5b2b0b6e078e Mon Sep 17 00:00:00 2001
From: Alon Zakai <alonzakai@gmail.com>
Date: Fri, 10 Aug 2012 10:30:10 -0700
Subject: [PATCH] Module.preInit

---
 src/postamble.js |  7 +++++++
 tests/runner.py  | 11 +++++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/postamble.js b/src/postamble.js
index 2944e6811..e1dd495a7 100644
--- a/src/postamble.js
+++ b/src/postamble.js
@@ -79,6 +79,13 @@ Module['run'] = run;
 
 // {{PRE_RUN_ADDITIONS}}
 
+if (Module['preInit']) {
+  if (typeof Module['preInit'] == 'function') Module['preInit'] = [Module['preInit']];
+  while (Module['preInit'].length > 0) {
+    Module['preInit'].pop()();
+  }
+}
+
 initRuntime();
 
 #if INVOKE_RUN
diff --git a/tests/runner.py b/tests/runner.py
index c6c7cb2c0..70f7ba9d6 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -7259,6 +7259,17 @@ f.close()
           open(os.path.join(self.get_dir(), 'a.out.js'), 'w').write(src)
           assert 'hello from main' in run_js(os.path.join(self.get_dir(), 'a.out.js')), 'main should print when called manually'
 
+      # Use postInit
+      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
+        var Module = {
+          preRun: function() { Module.print('pre-run') },
+          postRun: function() { Module.print('post-run') },
+          preInit: function() { Module.print('pre-init') }
+        };
+      ''')
+      Popen(['python', EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--pre-js', 'pre.js']).communicate()
+      self.assertContained('pre-init\npre-run\nhello from main\npost-run\n', run_js(os.path.join(self.get_dir(), 'a.out.js')))
+
     def test_prepost2(self):
       open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write('''
         #include <stdio.h>