Issue #4692, #3595 - Stop sleeping in the implementation of `SetTimeout`

test/PausePoint.cpp

+/*
+ * This file is part of Adblock Plus <https://adblockplus.org/>,
+ * Copyright (C) 2006-2017 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 "PausePoint.h"
+#include <thread>
+
+PausePoint::PausePoint()
+  : state(Idle)
+{}
+
+void PausePoint::Pause()
+{
+  UniqueLockType ul(m);
+  if (state == Waiting)
+  {
+    cv.notify_one();
+  }
+  state = Paused;
+  cv.wait(ul,
+    [this]() -> bool
+  {
+    return state != Paused;
+  });
+}
+
+void PausePoint::WaitUntilPaused()
+{
+  UniqueLockType ul(m);
+  if (state == Paused)
+  {
+    return;
+  }
+  state = Waiting;
+  cv.wait(ul,
+    [this]() -> bool
+  {
+    return state == Paused;
+  });
+}
+
+void PausePoint::Resume()
+{
+  UniqueLockType ul(m);
+  if (state != Paused)
+  {
+    throw std::runtime_error("May not call Resume() when the puppet is not blocked.");
+  }
+  state = Idle;
+  cv.notify_one();
+}
+
+void PausePoint::ResumeAndSleep(unsigned int ms)
+{
+  Resume();
+  std::this_thread::sleep_for(std::chrono::milliseconds(ms));
+}