1 files changed, 137 insertions, 0 deletions
diff --git a/xpcom/threads/CondVar.h b/xpcom/threads/CondVar.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_CondVar_h
+#define mozilla_CondVar_h
+
+#include "mozilla/BlockingResourceBase.h"
+#include "mozilla/PlatformConditionVariable.h"
+#include "mozilla/Mutex.h"
+#include "mozilla/TimeStamp.h"
+
+#if defined(MOZILLA_INTERNAL_API) && !defined(DEBUG)
+#  include "GeckoProfiler.h"
+#endif  // defined( MOZILLA_INTERNAL_API) && !defined(DEBUG)
+
+namespace mozilla {
+
+/**
+ * Similarly to OffTheBooksMutex, OffTheBooksCondvar is identical to CondVar,
+ * except that OffTheBooksCondVar doesn't include leak checking.  Sometimes
+ * you want to intentionally "leak" a CondVar until shutdown; in these cases,
+ * OffTheBooksCondVar is for you.
+ */
+class OffTheBooksCondVar : BlockingResourceBase {
+ public:
+  /**
+   * OffTheBooksCondVar
+   *
+   * The CALLER owns |aLock|.
+   *
+   * @param aLock A Mutex to associate with this condition variable.
+   * @param aName A name which can reference this monitor
+   * @returns If failure, nullptr.
+   *          If success, a valid Monitor* which must be destroyed
+   *          by Monitor::DestroyMonitor()
+   **/
+  OffTheBooksCondVar(OffTheBooksMutex& aLock, const char* aName)
+      : BlockingResourceBase(aName, eCondVar), mLock(&aLock) {}
+
+  /**
+   * ~OffTheBooksCondVar
+   * Clean up after this OffTheBooksCondVar, but NOT its associated Mutex.
+   **/
+  ~OffTheBooksCondVar() = default;
+
+  /**
+   * Wait
+   * @see prcvar.h
+   **/
+#ifndef DEBUG
+  void Wait() {
+#  ifdef MOZILLA_INTERNAL_API
+    AUTO_PROFILER_THREAD_SLEEP;
+#  endif  // MOZILLA_INTERNAL_API
+    mImpl.wait(*mLock);
+  }
+
+  CVStatus Wait(TimeDuration aDuration) {
+#  ifdef MOZILLA_INTERNAL_API
+    AUTO_PROFILER_THREAD_SLEEP;
+#  endif  // MOZILLA_INTERNAL_API
+    return mImpl.wait_for(*mLock, aDuration);
+  }
+#else
+  // NOTE: debug impl is in BlockingResourceBase.cpp
+  void Wait();
+  CVStatus Wait(TimeDuration aDuration);
+#endif
+
+  /**
+   * Notify
+   * @see prcvar.h
+   **/
+  void Notify() { mImpl.notify_one(); }
+
+  /**
+   * NotifyAll
+   * @see prcvar.h
+   **/
+  void NotifyAll() { mImpl.notify_all(); }
+
+#ifdef DEBUG
+  /**
+   * AssertCurrentThreadOwnsMutex
+   * @see Mutex::AssertCurrentThreadOwns
+   **/
+  void AssertCurrentThreadOwnsMutex() { mLock->AssertCurrentThreadOwns(); }
+
+  /**
+   * AssertNotCurrentThreadOwnsMutex
+   * @see Mutex::AssertNotCurrentThreadOwns
+   **/
+  void AssertNotCurrentThreadOwnsMutex() {
+    mLock->AssertNotCurrentThreadOwns();
+  }
+
+#else
+  void AssertCurrentThreadOwnsMutex() {}
+  void AssertNotCurrentThreadOwnsMutex() {}
+
+#endif  // ifdef DEBUG
+
+ private:
+  OffTheBooksCondVar();
+  OffTheBooksCondVar(const OffTheBooksCondVar&) = delete;
+  OffTheBooksCondVar& operator=(const OffTheBooksCondVar&) = delete;
+
+  OffTheBooksMutex* mLock;
+  detail::ConditionVariableImpl mImpl;
+};
+
+/**
+ * CondVar
+ * Vanilla condition variable.  Please don't use this unless you have a
+ * compelling reason --- Monitor provides a simpler API.
+ */
+class CondVar : public OffTheBooksCondVar {
+ public:
+  CondVar(OffTheBooksMutex& aLock, const char* aName)
+      : OffTheBooksCondVar(aLock, aName) {
+    MOZ_COUNT_CTOR(CondVar);
+  }
+
+  MOZ_COUNTED_DTOR(CondVar)
+
+ private:
+  CondVar();
+  CondVar(const CondVar&);
+  CondVar& operator=(const CondVar&);
+};
+
+}  // namespace mozilla
+
+#endif  // ifndef mozilla_CondVar_h