Bug 841312 - Remove the termination function API. r=bz

\o/

dom/base/nsIScriptContext.h

@@ -27,11 +27,9 @@ class nsIScriptObjectPrincipal;
 class nsIDOMWindow;
 class nsIURI;
 
-typedef void (*nsScriptTerminationFunc)(nsISupports* aRef);
-
 #define NS_ISCRIPTCONTEXT_IID \
-{ 0x821c5be9, 0xbf9e, 0x4041, \
-  { 0x9f, 0xf2, 0x1f, 0xca, 0x39, 0xf7, 0x89, 0xf3 } }
+{ 0xef0c91ce, 0x14f6, 0x41c9, \
+  { 0xa5, 0x77, 0xa6, 0xeb, 0xdc, 0x6d, 0x44, 0x7b } }
 
 /* This MUST match JSVERSION_DEFAULT.  This version stuff if we don't
    know what language we have is a little silly... */
@@ -179,11 +177,10 @@ public:
    * A GC may be done if "necessary."
    * This call is necessary if script evaluation is done
    * without using the EvaluateScript method.
-   * @param aTerminated If true then call termination function if it was 
-   *    previously set. Within DOM this will always be true, but outside 
-   *    callers (such as xpconnect) who may do script evaluations nested
-   *    inside DOM script evaluations can pass false to avoid premature
-   *    calls to the termination function.
+   * @param aTerminated If true then do script termination handling. Within DOM
+   *     this will always be true, but outside  callers (such as xpconnect) who
+   *     may do script evaluations nested inside inside DOM script evaluations
+   *     can pass false to avoid premature termination handling.
    * @return NS_OK if the method is successful
    */
   virtual void ScriptEvaluated(bool aTerminated) = 0;
@@ -196,19 +193,6 @@ public:
   virtual nsresult Deserialize(nsIObjectInputStream* aStream,
                                JS::MutableHandle<JSScript*> aResult) = 0;
 
-  /**
-   * JS only - this function need not be implemented by languages other
-   * than JS (ie, this should be moved to a private interface!)
-   * Called to specify a function that should be called when the current
-   * script (if there is one) terminates. Generally used if breakdown
-   * of script state needs to happen, but should be deferred till
-   * the end of script evaluation.
-   *
-   * @throws NS_ERROR_OUT_OF_MEMORY if that happens
-   */
-  virtual void SetTerminationFunction(nsScriptTerminationFunc aFunc,
-                                      nsIDOMWindow* aRef) = 0;
-
   /**
    * Called to disable/enable script execution in this context.
    */

dom/base/nsJSEnvironment.cpp

@@ -1141,7 +1141,6 @@ nsJSContext::nsJSContext(JSRuntime *aRuntime, bool aGCOnDestruction,
     ::JS_SetOperationCallback(mContext, DOMOperationCallback);
   }
   mIsInitialized = false;
-  mTerminations = nullptr;
   mScriptsEnabled = true;
   mOperationCallbackTime = 0;
   mModalStateTime = 0;
@@ -1156,11 +1155,6 @@ nsJSContext::~nsJSContext()
     mNext->mPrev = mPrev;
   }
 
-  // We may still have pending termination functions if the context is destroyed
-  // before they could be executed. In this case, free the references to their
-  // parameters, but don't execute the functions (see bug 622326).
-  delete mTerminations;
-
   mGlobalObjectRef = nullptr;
 
   DestroyJSContext();
@@ -1289,8 +1283,6 @@ nsJSContext::EvaluateString(const nsAString& aScript,
   NS_ENSURE_SUCCESS(rv, rv);
   NS_ENSURE_TRUE(ok, NS_OK);
 
-  nsJSContext::TerminationFuncHolder holder(this);
-
   // Scope the JSAutoCompartment so that it gets destroyed before we pop the
   // cx and potentially call JS_RestoreFrameChain.
   XPCAutoRequest ar(mContext);
@@ -1414,7 +1406,6 @@ nsJSContext::ExecuteScript(JSScript* aScriptObject_,
   nsCxPusher pusher;
   pusher.Push(mContext);
 
-  nsJSContext::TerminationFuncHolder holder(this);
   XPCAutoRequest ar(mContext);
 
   // Scope the JSAutoCompartment so that it gets destroyed before we pop the
@@ -2361,20 +2352,6 @@ nsJSContext::IsContextInitialized()
 void
 nsJSContext::ScriptEvaluated(bool aTerminated)
 {
-  if (aTerminated && mTerminations) {
-    // Make sure to null out mTerminations before doing anything that
-    // might cause new termination funcs to be added!
-    nsJSContext::TerminationFuncClosure* start = mTerminations;
-    mTerminations = nullptr;
-
-    for (nsJSContext::TerminationFuncClosure* cur = start;
-         cur;
-         cur = cur->mNext) {
-      (*(cur->mTerminationFunc))(cur->mTerminationFuncArg);
-    }
-    delete start;
-  }
-
   JS_MaybeGC(mContext);
 
   if (aTerminated) {
@@ -2384,17 +2361,6 @@ nsJSContext::ScriptEvaluated(bool aTerminated)
   }
 }
 
-void
-nsJSContext::SetTerminationFunction(nsScriptTerminationFunc aFunc,
-                                    nsIDOMWindow* aRef)
-{
-  NS_PRECONDITION(GetExecutingScript(), "should be executing script");
-
-  nsJSContext::TerminationFuncClosure* newClosure =
-    new nsJSContext::TerminationFuncClosure(aFunc, aRef, mTerminations);
-  mTerminations = newClosure;
-}
-
 bool
 nsJSContext::GetScriptsEnabled()
 {

dom/base/nsJSEnvironment.h

@@ -75,8 +75,6 @@ public:
   virtual bool IsContextInitialized();
 
   virtual void ScriptEvaluated(bool aTerminated);
-  virtual void SetTerminationFunction(nsScriptTerminationFunc aFunc,
-                                      nsIDOMWindow* aRef);
   virtual bool GetScriptsEnabled();
   virtual void SetScriptsEnabled(bool aEnabled, bool aFireTimeouts);
 
@@ -186,66 +184,6 @@ private:
   JSContext *mContext;
   bool mActive;
 
-  // Public so we can use it from CallbackFunction
-public:
-  struct TerminationFuncHolder;
-protected:
-  friend struct TerminationFuncHolder;
-  
-  struct TerminationFuncClosure
-  {
-    TerminationFuncClosure(nsScriptTerminationFunc aFunc,
-                           nsISupports* aArg,
-                           TerminationFuncClosure* aNext) :
-      mTerminationFunc(aFunc),
-      mTerminationFuncArg(aArg),
-      mNext(aNext)
-    {
-    }
-    ~TerminationFuncClosure()
-    {
-      delete mNext;
-    }
-    
-    nsScriptTerminationFunc mTerminationFunc;
-    nsCOMPtr<nsISupports> mTerminationFuncArg;
-    TerminationFuncClosure* mNext;
-  };
-
-  // Public so we can use it from CallbackFunction
-public:
-  struct TerminationFuncHolder
-  {
-    TerminationFuncHolder(nsJSContext* aContext)
-      : mContext(aContext),
-        mTerminations(aContext->mTerminations)
-    {
-      aContext->mTerminations = nullptr;
-    }
-    ~TerminationFuncHolder()
-    {
-      // Have to be careful here.  mContext might have picked up new
-      // termination funcs while the script was evaluating.  Prepend whatever
-      // we have to the current termination funcs on the context (since our
-      // termination funcs were posted first).
-      if (mTerminations) {
-        TerminationFuncClosure* cur = mTerminations;
-        while (cur->mNext) {
-          cur = cur->mNext;
-        }
-        cur->mNext = mContext->mTerminations;
-        mContext->mTerminations = mTerminations;
-      }
-    }
-
-    nsJSContext* mContext;
-    TerminationFuncClosure* mTerminations;
-  };
-
-protected:
-  TerminationFuncClosure* mTerminations;
-
-private:
   bool mIsInitialized;
   bool mScriptsEnabled;
   bool mGCOnDestruction;

dom/bindings/CallbackObject.cpp

@@ -109,14 +109,6 @@ CallbackObject::CallSetup::CallSetup(JS::Handle<JSObject*> aCallback,
   nsresult rv = nsContentUtils::GetSecurityManager()->
     CheckFunctionAccess(cx, js::UncheckedUnwrap(aCallback), nullptr);
 
-  // Construct a termination func holder even if we're not planning to
-  // run any script.  We need this because we're going to call
-  // ScriptEvaluated even if we don't run the script...  See XXX
-  // comment above.
-  if (ctx) {
-    mTerminationFuncHolder.construct(static_cast<nsJSContext*>(ctx));
-  }
-
   if (NS_FAILED(rv)) {
     // Security check failed.  We're done here.
     return;

dom/bindings/CallbackObject.h

@@ -148,10 +148,6 @@ protected:
     // this needs to be a Maybe.
     Maybe<XPCAutoRequest> mAr;
 
-    // Can't construct a TerminationFuncHolder without an nsJSContext.  But we
-    // generally want its destructor to come after the destructor of mCxPusher.
-    Maybe<nsJSContext::TerminationFuncHolder> mTerminationFuncHolder;
-
     nsCxPusher mCxPusher;
 
     // Can't construct a JSAutoCompartment without a JSContext either.  Also,