Mojo: add mojo_message_pipe_perftests

mojo/system/message_pipe_test_utils.cc

Index: mojo/system/message_pipe_test_utils.cc
diff --git a/mojo/system/message_pipe_test_utils.cc b/mojo/system/message_pipe_test_utils.cc
new file mode 100644
index 0000000000000000000000000000000000000000..1c6e2f83f13968b4dab710884e14676946e03592
--- /dev/null
+++ b/mojo/system/message_pipe_test_utils.cc
@@ -0,0 +1,110 @@
+// Copyright 2014 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.
+
+#include "mojo/system/message_pipe_test_utils.h"
+
+#include "base/bind.h"
+#include "base/threading/platform_thread.h"  // For |Sleep()|.
+#include "mojo/system/waiter.h"
+
+namespace mojo {
+namespace system {
+namespace test {
+
+MojoResult WaitIfNecessary(scoped_refptr<MessagePipe> mp,
+                           MojoHandleSignals signals,
+                           HandleSignalsState* signals_state) {
+  Waiter waiter;
+  waiter.Init();
+
+  MojoResult add_result = mp->AddWaiter(0, &waiter, signals, 0, signals_state);
+  if (add_result != MOJO_RESULT_OK) {
+    return (add_result == MOJO_RESULT_ALREADY_EXISTS) ? MOJO_RESULT_OK
+                                                      : add_result;
+  }
+
+  MojoResult wait_result = waiter.Wait(MOJO_DEADLINE_INDEFINITE, NULL);
+  mp->RemoveWaiter(0, &waiter, signals_state);
+  return wait_result;
+}
+
+ChannelThread::ChannelThread(embedder::PlatformSupport* platform_support)
+    : platform_support_(platform_support),
+      test_io_thread_(test::TestIOThread::kManualStart) {
+}
+
+ChannelThread::~ChannelThread() {
+  Stop();
+}
+
+void ChannelThread::Start(embedder::ScopedPlatformHandle platform_handle,
+                          scoped_refptr<MessagePipe> message_pipe) {
+  test_io_thread_.Start();
+  test_io_thread_.PostTaskAndWait(
+      FROM_HERE,
+      base::Bind(&ChannelThread::InitChannelOnIOThread,
+                 base::Unretained(this),
+                 base::Passed(&platform_handle),
+                 message_pipe));
+}
+
+void ChannelThread::Stop() {
+  if (channel_) {
+    // Hack to flush write buffers before quitting.
+    // TODO(vtl): Remove this once |Channel| has a
+    // |FlushWriteBufferAndShutdown()| (or whatever).
+    while (!channel_->IsWriteBufferEmpty())
+      base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(20));
+
+    test_io_thread_.PostTaskAndWait(
+        FROM_HERE,
+        base::Bind(&ChannelThread::ShutdownChannelOnIOThread,
+                   base::Unretained(this)));
+  }
+  test_io_thread_.Stop();
+}
+
+void ChannelThread::InitChannelOnIOThread(
+    embedder::ScopedPlatformHandle platform_handle,
+    scoped_refptr<MessagePipe> message_pipe) {
+  CHECK_EQ(base::MessageLoop::current(), test_io_thread_.message_loop());
+  CHECK(platform_handle.is_valid());
+
+  // Create and initialize |Channel|.
+  channel_ = new Channel(platform_support_);
+  CHECK(channel_->Init(RawChannel::Create(platform_handle.Pass())));
+
+  // Attach the message pipe endpoint.
+  // Note: On the "server" (parent process) side, we need not attach the
+  // message pipe endpoint immediately. However, on the "client" (child
+  // process) side, this *must* be done here -- otherwise, the |Channel| may
+  // receive/process messages (which it can do as soon as it's hooked up to
+  // the IO thread message loop, and that message loop runs) before the
+  // message pipe endpoint is attached.
+  CHECK_EQ(channel_->AttachMessagePipeEndpoint(message_pipe, 1),
+           Channel::kBootstrapEndpointId);
+  CHECK(channel_->RunMessagePipeEndpoint(Channel::kBootstrapEndpointId,
+                                         Channel::kBootstrapEndpointId));
+}
+
+void ChannelThread::ShutdownChannelOnIOThread() {
+  CHECK(channel_);
+  channel_->Shutdown();
+  channel_ = NULL;
+}
+
+MultiprocessMessagePipeTestBase::MultiprocessMessagePipeTestBase()
+    : channel_thread_(&platform_support_) {
+}
+
+MultiprocessMessagePipeTestBase::~MultiprocessMessagePipeTestBase() {
+}
+
+void MultiprocessMessagePipeTestBase::Init(scoped_refptr<MessagePipe> mp) {
+  channel_thread_.Start(helper_.server_platform_handle.Pass(), mp);
+}
+
+}  // namespace test
+}  // namespace system
+}  // namespace mojo