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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/system/platform_handle_dispatcher.h"
#include "base/synchronization/lock.h"
#include "mojo/edk/embedder/platform_handle_vector.h"
namespace mojo {
namespace edk {
// static
scoped_refptr<PlatformHandleDispatcher> PlatformHandleDispatcher::Create(
ScopedPlatformHandle platform_handle) {
return new PlatformHandleDispatcher(std::move(platform_handle));
}
ScopedPlatformHandle PlatformHandleDispatcher::PassPlatformHandle() {
return std::move(platform_handle_);
}
Dispatcher::Type PlatformHandleDispatcher::GetType() const {
return Type::PLATFORM_HANDLE;
}
MojoResult PlatformHandleDispatcher::Close() {
base::AutoLock lock(lock_);
if (is_closed_ || in_transit_)
return MOJO_RESULT_INVALID_ARGUMENT;
is_closed_ = true;
platform_handle_.reset();
return MOJO_RESULT_OK;
}
void PlatformHandleDispatcher::StartSerialize(uint32_t* num_bytes,
uint32_t* num_ports,
uint32_t* num_handles) {
*num_bytes = 0;
*num_ports = 0;
*num_handles = 1;
}
bool PlatformHandleDispatcher::EndSerialize(void* destination,
ports::PortName* ports,
PlatformHandle* handles) {
base::AutoLock lock(lock_);
if (is_closed_)
return false;
handles[0] = platform_handle_.get();
return true;
}
bool PlatformHandleDispatcher::BeginTransit() {
base::AutoLock lock(lock_);
if (in_transit_)
return false;
in_transit_ = !is_closed_;
return in_transit_;
}
void PlatformHandleDispatcher::CompleteTransitAndClose() {
base::AutoLock lock(lock_);
in_transit_ = false;
is_closed_ = true;
// The system has taken ownership of our handle.
ignore_result(platform_handle_.release());
}
void PlatformHandleDispatcher::CancelTransit() {
base::AutoLock lock(lock_);
in_transit_ = false;
}
// static
scoped_refptr<PlatformHandleDispatcher> PlatformHandleDispatcher::Deserialize(
const void* bytes,
size_t num_bytes,
const ports::PortName* ports,
size_t num_ports,
PlatformHandle* handles,
size_t num_handles) {
if (num_bytes || num_ports || num_handles != 1)
return nullptr;
PlatformHandle handle;
std::swap(handle, handles[0]);
return PlatformHandleDispatcher::Create(ScopedPlatformHandle(handle));
}
PlatformHandleDispatcher::PlatformHandleDispatcher(
ScopedPlatformHandle platform_handle)
: platform_handle_(std::move(platform_handle)) {}
PlatformHandleDispatcher::~PlatformHandleDispatcher() {
DCHECK(is_closed_ && !in_transit_);
DCHECK(!platform_handle_.is_valid());
}
} // namespace edk
} // namespace mojo
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