ABP/Android V8 integration code

jni/timerOps.cpp

+/*
+ * This file is part of the Adblock Plus,
+ * Copyright (C) 2006-2012 Eyeo GmbH
+ *
+ * Adblock Plus is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 3 as
+ * published by the Free Software Foundation.
+ *
+ * Adblock Plus is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <unistd.h>
+#include <list>
+#include "debug.h"
+#include "ops.h"
+
+typedef struct __QueueEntry
+{
+  v8::Persistent<v8::Function> callback;
+  int64_t delay;
+} QueueEntry;
+
+static std::list<QueueEntry*> queue;
+
+v8::Handle<v8::Value> setTimeoutImpl(const v8::Arguments& args)
+{
+  D(D_WARN, "setTimeout()");
+  v8::HandleScope handle_scope;
+
+  JNIEnv* jniEnv = NULL;
+  if (globalJvm->AttachCurrentThread(&jniEnv, NULL) != 0)
+    return v8::ThrowException(v8::String::New("Failed to get JNI environment"));
+
+  if (args.Length() < 2)
+    return v8::ThrowException(v8::String::New("Not enough parameters"));
+
+  if (!args[0]->IsFunction())
+    return v8::ThrowException(v8::String::New("Parameter 0 must be a function"));
+  if (!args[1]->IsInt32())
+    return v8::ThrowException(v8::String::New("Parameter 1 must be an integer"));
+
+  v8::Handle<v8::Function> callback = v8::Handle<v8::Function>::Cast(args[0]);
+
+  QueueEntry* entry = new QueueEntry;
+  entry->callback = v8::Persistent<v8::Function>::New(callback);
+  entry->delay = (v8::Handle<v8::Integer>::Cast(args[1]))->Value();
+
+  queue.push_back(entry);
+
+  jlong jnum = entry->delay;
+
+  static jclass cls = jniEnv->GetObjectClass(jniCallback);
+  static jmethodID mid = jniEnv->GetMethodID(cls, "notify", "(J)V");
+  if (mid)
+    jniEnv->CallVoidMethod(jniCallback, mid, jnum);
+
+  return v8::Undefined();
+}
+
+long RunNextCallback(v8::Handle<v8::Context> context)
+{
+  D(D_WARN, "RunNextCallback()");
+  if (queue.size() == 0)
+    return -1;
+
+  std::list<QueueEntry*>::iterator minEntry = queue.begin();
+  for (std::list<QueueEntry*>::iterator it = minEntry; it != queue.end(); it++)
+    if ((*it)->delay < (*minEntry)->delay)
+      minEntry = it;
+
+  int64_t delay = (*minEntry)->delay;
+  if (delay > 0)
+  {
+    // Here we assume that we will be called next time after the specified delay,
+    // caller should ensure this
+    for (std::list<QueueEntry*>::iterator it = queue.begin(); it != queue.end(); it++)
+      (*it)->delay -= delay;
+    return delay;
+  }
+
+  QueueEntry* entry = *minEntry;
+  queue.erase(minEntry);
+
+  entry->callback->Call(context->Global(), 0, NULL);
+  entry->callback.Dispose();
+  delete entry;
+
+  return 0;
+}
+
+void ClearQueue()
+{
+  queue.clear();
+}