Index: mojo/edk/system/waiter.h |
diff --git a/mojo/edk/system/waiter.h b/mojo/edk/system/waiter.h |
deleted file mode 100644 |
index 03ada1664302e406c9b226c22b39d628f6b72cb3..0000000000000000000000000000000000000000 |
--- a/mojo/edk/system/waiter.h |
+++ /dev/null |
@@ -1,81 +0,0 @@ |
-// Copyright 2013 The Chromium Authors. All rights reserved. |
-// Use of this source code is governed by a BSD-style license that can be |
-// found in the LICENSE file. |
- |
-#ifndef MOJO_EDK_SYSTEM_WAITER_H_ |
-#define MOJO_EDK_SYSTEM_WAITER_H_ |
- |
-#include <stdint.h> |
- |
-#include "base/macros.h" |
-#include "base/synchronization/condition_variable.h" |
-#include "base/synchronization/lock.h" |
-#include "mojo/edk/system/system_impl_export.h" |
-#include "mojo/public/c/system/types.h" |
- |
-namespace mojo { |
-namespace system { |
- |
-// IMPORTANT (all-caps gets your attention, right?): |Waiter| methods are called |
-// under other locks, in particular, |Dispatcher::lock_|s, so |Waiter| methods |
-// must never call out to other objects (in particular, |Dispatcher|s). This |
-// class is thread-safe. |
-class MOJO_SYSTEM_IMPL_EXPORT Waiter { |
- public: |
- Waiter(); |
- ~Waiter(); |
- |
- // A |Waiter| can be used multiple times; |Init()| should be called before |
- // each time it's used. |
- void Init(); |
- |
- // Waits until a suitable |Awake()| is called. (|context| may be null, in |
- // which case, obviously no context is ever returned.) |
- // Returns: |
- // - The result given to the first call to |Awake()| (possibly before this |
- // call to |Wait()|); in this case, |*context| is set to the value passed |
- // to that call to |Awake()|. |
- // - |MOJO_RESULT_DEADLINE_EXCEEDED| if the deadline was exceeded; in this |
- // case |*context| is not modified. |
- // |
- // Usually, the context passed to |Awake()| will be the value passed to |
- // |Dispatcher::AddWaiter()|, which is usually the index to the array of |
- // handles passed to |MojoWaitMany()| (or 0 for |MojoWait()|). |
- // |
- // Typical |Awake()| results are: |
- // - |MOJO_RESULT_OK| if one of the flags passed to |
- // |MojoWait()|/|MojoWaitMany()| (hence |Dispatcher::AddWaiter()|) was |
- // satisfied; |
- // - |MOJO_RESULT_CANCELLED| if a handle (on which |
- // |MojoWait()|/|MojoWaitMany()| was called) was closed (hence the |
- // dispatcher closed); and |
- // - |MOJO_RESULT_FAILED_PRECONDITION| if one of the set of flags passed to |
- // |MojoWait()|/|MojoWaitMany()| cannot or can no longer be satisfied by |
- // the corresponding handle (e.g., if the other end of a message or data |
- // pipe is closed). |
- MojoResult Wait(MojoDeadline deadline, uint32_t* context); |
- |
- // Wake the waiter up with the given result and context (or no-op if it's been |
- // woken up already). |
- void Awake(MojoResult result, uint32_t context); |
- |
- private: |
- base::ConditionVariable cv_; // Associated to |lock_|. |
- base::Lock lock_; // Protects the following members. |
-#ifndef NDEBUG |
- bool initialized_; |
-#endif |
- bool awoken_; |
- MojoResult awake_result_; |
- // This is a |uint32_t| because we really only need to store an index (for |
- // |MojoWaitMany()|). But in tests, it's convenient to use this for other |
- // purposes (e.g., to distinguish between different wake-up reasons). |
- uint32_t awake_context_; |
- |
- DISALLOW_COPY_AND_ASSIGN(Waiter); |
-}; |
- |
-} // namespace system |
-} // namespace mojo |
- |
-#endif // MOJO_EDK_SYSTEM_WAITER_H_ |