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// 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/edk/embedder/embedder.h"
#include <utility>
#include "base/atomicops.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/command_line.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_loop.h"
#include "base/task_runner.h"
#include "mojo/edk/embedder/embedder_internal.h"
#include "mojo/edk/embedder/platform_channel_pair.h"
#include "mojo/edk/embedder/process_delegate.h"
#include "mojo/edk/embedder/simple_platform_support.h"
#include "mojo/edk/system/broker_state.h"
#include "mojo/edk/system/child_broker.h"
#include "mojo/edk/system/child_broker_host.h"
#include "mojo/edk/system/configuration.h"
#include "mojo/edk/system/core.h"
#include "mojo/edk/system/message_pipe_dispatcher.h"
#include "mojo/edk/system/platform_handle_dispatcher.h"
namespace mojo {
namespace edk {
namespace internal {
// Declared in embedder_internal.h.
Broker* g_broker = nullptr;
PlatformSupport* g_platform_support = nullptr;
Core* g_core = nullptr;
ProcessDelegate* g_process_delegate;
base::TaskRunner* g_io_thread_task_runner = nullptr;
Core* GetCore() {
return g_core;
}
} // namespace internal
void SetMaxMessageSize(size_t bytes) {
GetMutableConfiguration()->max_message_num_bytes = bytes;
}
void PreInitializeParentProcess() {
BrokerState::GetInstance();
}
void PreInitializeChildProcess() {
ChildBroker::GetInstance();
}
ScopedPlatformHandle ChildProcessLaunched(base::ProcessHandle child_process) {
PlatformChannelPair token_channel;
new ChildBrokerHost(child_process, token_channel.PassServerHandle());
return token_channel.PassClientHandle();
}
void ChildProcessLaunched(base::ProcessHandle child_process,
ScopedPlatformHandle server_pipe) {
new ChildBrokerHost(child_process, std::move(server_pipe));
}
void SetParentPipeHandle(ScopedPlatformHandle pipe) {
ChildBroker::GetInstance()->SetChildBrokerHostHandle(std::move(pipe));
}
void Init() {
const base::CommandLine& command_line =
*base::CommandLine::ForCurrentProcess();
if (command_line.HasSwitch("use-new-edk") && !internal::g_broker)
BrokerState::GetInstance();
DCHECK(!internal::g_platform_support);
internal::g_platform_support = new SimplePlatformSupport();
DCHECK(!internal::g_core);
internal::g_core = new Core(internal::g_platform_support);
}
MojoResult AsyncWait(MojoHandle handle,
MojoHandleSignals signals,
const base::Callback<void(MojoResult)>& callback) {
return internal::g_core->AsyncWait(handle, signals, callback);
}
MojoResult CreatePlatformHandleWrapper(
ScopedPlatformHandle platform_handle,
MojoHandle* platform_handle_wrapper_handle) {
DCHECK(platform_handle_wrapper_handle);
scoped_refptr<Dispatcher> dispatcher =
PlatformHandleDispatcher::Create(std::move(platform_handle));
DCHECK(internal::g_core);
MojoHandle h = internal::g_core->AddDispatcher(dispatcher);
if (h == MOJO_HANDLE_INVALID) {
LOG(ERROR) << "Handle table full";
dispatcher->Close();
return MOJO_RESULT_RESOURCE_EXHAUSTED;
}
*platform_handle_wrapper_handle = h;
return MOJO_RESULT_OK;
}
MojoResult PassWrappedPlatformHandle(MojoHandle platform_handle_wrapper_handle,
ScopedPlatformHandle* platform_handle) {
DCHECK(platform_handle);
DCHECK(internal::g_core);
scoped_refptr<Dispatcher> dispatcher(
internal::g_core->GetDispatcher(platform_handle_wrapper_handle));
if (!dispatcher)
return MOJO_RESULT_INVALID_ARGUMENT;
if (dispatcher->GetType() != Dispatcher::Type::PLATFORM_HANDLE)
return MOJO_RESULT_INVALID_ARGUMENT;
*platform_handle = static_cast<PlatformHandleDispatcher*>(dispatcher.get())
->PassPlatformHandle();
return MOJO_RESULT_OK;
}
void InitIPCSupport(ProcessDelegate* process_delegate,
scoped_refptr<base::TaskRunner> io_thread_task_runner) {
// |Init()| must have already been called.
DCHECK(internal::g_core);
internal::g_process_delegate = process_delegate;
internal::g_io_thread_task_runner = io_thread_task_runner.get();
}
void ShutdownIPCSupportOnIOThread() {
}
void ShutdownIPCSupport() {
// TODO(jam): remove ProcessDelegate from new EDK once the old EDK is gone.
internal::g_process_delegate->OnShutdownComplete();
}
ScopedMessagePipeHandle CreateMessagePipe(
ScopedPlatformHandle platform_handle) {
MojoCreateMessagePipeOptions options = {
static_cast<uint32_t>(sizeof(MojoCreateMessagePipeOptions)),
MOJO_CREATE_MESSAGE_PIPE_OPTIONS_FLAG_TRANSFERABLE};
scoped_refptr<MessagePipeDispatcher> dispatcher =
MessagePipeDispatcher::Create(options);
ScopedMessagePipeHandle rv(
MessagePipeHandle(internal::g_core->AddDispatcher(dispatcher)));
CHECK(rv.is_valid());
dispatcher->Init(std::move(platform_handle), nullptr, 0, nullptr, 0, nullptr,
nullptr);
// TODO(vtl): The |.Pass()| below is only needed due to an MSVS bug; remove it
// once that's fixed.
return rv;
}
} // namespace edk
} // namespace mojo
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