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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 "base/atomicops.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/task_runner.h"
#include "mojo/edk/embedder/embedder_internal.h"
#include "mojo/edk/embedder/process_delegate.h"
#include "mojo/edk/embedder/simple_platform_support.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 {
// TODO(jam): move into annonymous namespace. Keep outside for debugging in VS
// temporarily.
int g_channel_count = 0;
bool g_wait_for_no_more_channels = false;
namespace {
// Note: Called on the I/O thread.
void ShutdownIPCSupportHelper(bool wait_for_no_more_channels) {
if (wait_for_no_more_channels && g_channel_count) {
g_wait_for_no_more_channels = true;
return;
}
internal::g_delegate_thread_task_runner->PostTask(
FROM_HERE, base::Bind(&ProcessDelegate::OnShutdownComplete,
base::Unretained(internal::g_process_delegate)));
}
} // namespace
namespace internal {
// Declared in embedder_internal.h.
PlatformSupport* g_platform_support = nullptr;
Core* g_core = nullptr;
base::TaskRunner* g_delegate_thread_task_runner;
ProcessDelegate* g_process_delegate;
base::TaskRunner* g_io_thread_task_runner = nullptr;
Core* GetCore() {
return g_core;
}
void ChannelStarted() {
DCHECK(g_io_thread_task_runner->RunsTasksOnCurrentThread());
g_channel_count++;
}
void ChannelShutdown() {
DCHECK(g_io_thread_task_runner->RunsTasksOnCurrentThread());
DCHECK_GT(g_channel_count, 0);
g_channel_count--;
if (!g_channel_count && g_wait_for_no_more_channels) {
// Reset g_wait_for_no_more_channels for unit tests which initialize and
// tear down multiple times in a process.
g_wait_for_no_more_channels = false;
ShutdownIPCSupportHelper(false);
}
}
} // namespace internal
void SetMaxMessageSize(size_t bytes) {
GetMutableConfiguration()->max_message_num_bytes = bytes;
}
void Init() {
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(platform_handle.Pass());
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()
.Pass();
return MOJO_RESULT_OK;
}
void InitIPCSupport(scoped_refptr<base::TaskRunner> delegate_thread_task_runner,
ProcessDelegate* process_delegate,
scoped_refptr<base::TaskRunner> io_thread_task_runner) {
// |Init()| must have already been called.
DCHECK(internal::g_core);
internal::g_delegate_thread_task_runner = delegate_thread_task_runner.get();
internal::g_process_delegate = process_delegate;
internal::g_io_thread_task_runner = io_thread_task_runner.get();
}
void ShutdownIPCSupportOnIOThread() {
}
void ShutdownIPCSupport() {
internal::g_io_thread_task_runner->PostTask(
FROM_HERE, base::Bind(&ShutdownIPCSupportHelper, false));
}
void ShutdownIPCSupportAndWaitForNoChannels() {
internal::g_io_thread_task_runner->PostTask(
FROM_HERE, base::Bind(&ShutdownIPCSupportHelper, true));
}
ScopedMessagePipeHandle CreateMessagePipe(
ScopedPlatformHandle platform_handle) {
scoped_refptr<MessagePipeDispatcher> dispatcher =
MessagePipeDispatcher::Create(
MessagePipeDispatcher::kDefaultCreateOptions);
ScopedMessagePipeHandle rv(
MessagePipeHandle(internal::g_core->AddDispatcher(dispatcher)));
CHECK(rv.is_valid());
dispatcher->Init(platform_handle.Pass(), 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.Pass();
}
} // namespace edk
} // namespace mojo
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