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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "mojo/public/utility/bindings_support_impl.h" | |
| 6 | |
| 7 #include <assert.h> | |
| 8 | |
| 9 #include "mojo/public/bindings/lib/buffer.h" | |
| 10 #include "mojo/public/utility/run_loop.h" | |
| 11 #include "mojo/public/utility/run_loop_handler.h" | |
| 12 #include "mojo/public/utility/thread_local.h" | |
| 13 | |
| 14 namespace mojo { | |
| 15 namespace internal { | |
| 16 namespace { | |
| 17 | |
| 18 ThreadLocalPointer<Buffer>* tls_buffer = NULL; | |
| 19 | |
| 20 // RunLoopHandler implementation used for a request to AsyncWait(). There are | |
| 21 // two ways RunLoopHandlerImpl is deleted: | |
| 22 // . when the handle is ready (or errored). | |
| 23 // . when BindingsSupport::CancelWait() is invoked. | |
| 24 class RunLoopHandlerImpl : public RunLoopHandler { | |
| 25 public: | |
| 26 RunLoopHandlerImpl(const Handle& handle, | |
| 27 BindingsSupport::AsyncWaitCallback* callback) | |
| 28 : handle_(handle), | |
| 29 callback_(callback) {} | |
| 30 virtual ~RunLoopHandlerImpl() { | |
| 31 RunLoop::current()->RemoveHandler(handle_); | |
| 32 } | |
| 33 | |
| 34 // RunLoopHandler: | |
| 35 virtual void OnHandleReady(const Handle& handle) MOJO_OVERRIDE { | |
| 36 NotifyCallback(MOJO_RESULT_OK); | |
| 37 } | |
| 38 | |
| 39 virtual void OnHandleError(const Handle& handle, | |
| 40 MojoResult result) MOJO_OVERRIDE { | |
| 41 NotifyCallback(result); | |
| 42 } | |
| 43 | |
| 44 private: | |
| 45 void NotifyCallback(MojoResult result) { | |
| 46 // Delete this to unregister the handle. That way if the callback | |
| 47 // reregisters everything is ok. | |
| 48 BindingsSupport::AsyncWaitCallback* callback = callback_; | |
| 49 delete this; | |
| 50 | |
| 51 callback->OnHandleReady(result); | |
| 52 } | |
| 53 | |
| 54 const Handle handle_; | |
| 55 BindingsSupport::AsyncWaitCallback* callback_; | |
| 56 | |
| 57 MOJO_DISALLOW_COPY_AND_ASSIGN(RunLoopHandlerImpl); | |
| 58 }; | |
| 59 | |
| 60 } // namespace | |
| 61 | |
| 62 BindingsSupportImpl::BindingsSupportImpl() { | |
| 63 } | |
| 64 | |
| 65 BindingsSupportImpl::~BindingsSupportImpl() { | |
| 66 } | |
| 67 | |
| 68 // static | |
| 69 void BindingsSupportImpl::SetUp() { | |
| 70 assert(!tls_buffer); | |
| 71 tls_buffer = new ThreadLocalPointer<Buffer>; | |
| 72 } | |
| 73 | |
| 74 // static | |
| 75 void BindingsSupportImpl::TearDown() { | |
| 76 assert(tls_buffer); | |
| 77 delete tls_buffer; | |
| 78 tls_buffer = NULL; | |
| 79 } | |
| 80 | |
| 81 Buffer* BindingsSupportImpl::GetCurrentBuffer() { | |
| 82 return tls_buffer->Get(); | |
| 83 } | |
| 84 | |
| 85 Buffer* BindingsSupportImpl::SetCurrentBuffer(Buffer* buf) { | |
| 86 Buffer* old_buf = tls_buffer->Get(); | |
| 87 tls_buffer->Set(buf); | |
| 88 return old_buf; | |
| 89 } | |
| 90 | |
| 91 BindingsSupport::AsyncWaitID BindingsSupportImpl::AsyncWait( | |
| 92 const Handle& handle, | |
| 93 MojoWaitFlags flags, | |
| 94 AsyncWaitCallback* callback) { | |
| 95 RunLoop* run_loop = RunLoop::current(); | |
| 96 assert(run_loop); | |
| 97 // |run_loop_handler| is destroyed either when the handle is ready or if | |
| 98 // CancelWait is invoked. | |
| 99 RunLoopHandlerImpl* run_loop_handler = | |
| 100 new RunLoopHandlerImpl(handle, callback); | |
| 101 run_loop->AddHandler(run_loop_handler, handle, flags, | |
| 102 MOJO_DEADLINE_INDEFINITE); | |
| 103 return run_loop_handler; | |
| 104 } | |
| 105 | |
| 106 void BindingsSupportImpl::CancelWait(AsyncWaitID async_wait_id) { | |
| 107 delete static_cast<RunLoopHandlerImpl*>(async_wait_id); | |
| 108 } | |
| 109 | |
| 110 } // namespace internal | |
| 111 } // namespace mojo | |
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Chromium Code Reviews
Issue 134253004:
Mojo: AsyncWaiter and mojo/public/environment (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src