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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "mojo/core/dispatcher.h"
#include "base/logging.h"
#include "mojo/core/configuration.h"
#include "mojo/core/data_pipe_consumer_dispatcher.h"
#include "mojo/core/data_pipe_producer_dispatcher.h"
#include "mojo/core/message_pipe_dispatcher.h"
#include "mojo/core/platform_handle_dispatcher.h"
#include "mojo/core/ports/event.h"
#include "mojo/core/shared_buffer_dispatcher.h"
namespace mojo {
namespace core {
namespace {
constinit thread_local bool is_extracting_handles_from_message = false;
} // namespace
Dispatcher::DispatcherInTransit::DispatcherInTransit() = default;
Dispatcher::DispatcherInTransit::DispatcherInTransit(
const DispatcherInTransit& other) = default;
Dispatcher::DispatcherInTransit::~DispatcherInTransit() = default;
// static
void Dispatcher::SetExtractingHandlesFromMessage(bool extracting) {
is_extracting_handles_from_message = extracting;
}
// static
void Dispatcher::AssertNotExtractingHandlesFromMessage() {
DCHECK(!is_extracting_handles_from_message);
}
MojoResult Dispatcher::WatchDispatcher(scoped_refptr<Dispatcher> dispatcher,
MojoHandleSignals signals,
MojoTriggerCondition condition,
uintptr_t context) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::CancelWatch(uintptr_t context) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::Arm(uint32_t* num_blocking_events,
MojoTrapEvent* blocking_events) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::WriteMessage(
std::unique_ptr<ports::UserMessageEvent> message) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::ReadMessage(
std::unique_ptr<ports::UserMessageEvent>* message) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::DuplicateBufferHandle(
const MojoDuplicateBufferHandleOptions* options,
scoped_refptr<Dispatcher>* new_dispatcher) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::MapBuffer(
uint64_t offset,
uint64_t num_bytes,
std::unique_ptr<PlatformSharedMemoryMapping>* mapping) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::GetBufferInfo(MojoSharedBufferInfo* info) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::ReadData(const MojoReadDataOptions& options,
void* elements,
uint32_t* num_bytes) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::BeginReadData(const void** buffer,
uint32_t* buffer_num_bytes) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::EndReadData(uint32_t num_bytes_read) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::WriteData(const void* elements,
uint32_t* num_bytes,
const MojoWriteDataOptions& options) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::BeginWriteData(void** buffer,
uint32_t* buffer_num_bytes,
MojoBeginWriteDataFlags flags) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::EndWriteData(uint32_t num_bytes_written) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::AttachMessagePipe(std::string_view name,
ports::PortRef remote_peer_port) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::ExtractMessagePipe(std::string_view name,
MojoHandle* message_pipe_handle) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::SetQuota(MojoQuotaType type, uint64_t limit) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::QueryQuota(MojoQuotaType type,
uint64_t* limit,
uint64_t* usage) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
HandleSignalsState Dispatcher::GetHandleSignalsState() const {
return HandleSignalsState();
}
MojoResult Dispatcher::AddWatcherRef(
const scoped_refptr<WatcherDispatcher>& watcher,
uintptr_t context) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
MojoResult Dispatcher::RemoveWatcherRef(WatcherDispatcher* watcher,
uintptr_t context) {
return MOJO_RESULT_INVALID_ARGUMENT;
}
void Dispatcher::StartSerialize(uint32_t* num_bytes,
uint32_t* num_ports,
uint32_t* num_platform_handles) {
*num_bytes = 0;
*num_ports = 0;
*num_platform_handles = 0;
}
bool Dispatcher::EndSerialize(void* destination,
ports::PortName* ports,
PlatformHandle* handles) {
LOG(ERROR) << "Attempting to serialize a non-transferrable dispatcher.";
return true;
}
bool Dispatcher::BeginTransit() {
return true;
}
void Dispatcher::CompleteTransitAndClose() {}
void Dispatcher::CancelTransit() {}
// static
scoped_refptr<Dispatcher> Dispatcher::Deserialize(
Type type,
const void* bytes,
size_t num_bytes,
const ports::PortName* ports,
size_t num_ports,
PlatformHandle* platform_handles,
size_t num_platform_handles) {
switch (type) {
case Type::MESSAGE_PIPE:
return MessagePipeDispatcher::Deserialize(bytes, num_bytes, ports,
num_ports, platform_handles,
num_platform_handles);
case Type::SHARED_BUFFER:
return SharedBufferDispatcher::Deserialize(bytes, num_bytes, ports,
num_ports, platform_handles,
num_platform_handles);
case Type::DATA_PIPE_CONSUMER:
return DataPipeConsumerDispatcher::Deserialize(
bytes, num_bytes, ports, num_ports, platform_handles,
num_platform_handles);
case Type::DATA_PIPE_PRODUCER:
return DataPipeProducerDispatcher::Deserialize(
bytes, num_bytes, ports, num_ports, platform_handles,
num_platform_handles);
case Type::PLATFORM_HANDLE:
return PlatformHandleDispatcher::Deserialize(bytes, num_bytes, ports,
num_ports, platform_handles,
num_platform_handles);
default:
LOG(ERROR) << "Deserializing invalid dispatcher type.";
return nullptr;
}
}
Dispatcher::Dispatcher() = default;
Dispatcher::~Dispatcher() = default;
} // namespace core
} // namespace mojo
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