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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ppapi/proxy/resource_message_params.h"
#include "base/check.h"
#include "base/memory/read_only_shared_memory_region.h"
#include "ppapi/c/pp_errors.h"
#include "ppapi/proxy/ppapi_messages.h"
namespace ppapi {
namespace proxy {
ResourceMessageParams::SerializedHandles::SerializedHandles()
: should_close_(false) {
}
ResourceMessageParams::SerializedHandles::~SerializedHandles() {
if (should_close_) {
for (std::vector<SerializedHandle>::iterator iter = data_.begin();
iter != data_.end(); ++iter) {
iter->Close();
}
}
}
ResourceMessageParams::ResourceMessageParams()
: pp_resource_(0),
sequence_(0),
handles_(new SerializedHandles()) {
}
ResourceMessageParams::ResourceMessageParams(PP_Resource resource,
int32_t sequence)
: pp_resource_(resource),
sequence_(sequence),
handles_(new SerializedHandles()) {
}
ResourceMessageParams::~ResourceMessageParams() {
}
void ResourceMessageParams::Serialize(base::Pickle* msg) const {
WriteHeader(msg);
WriteHandles(msg);
}
bool ResourceMessageParams::Deserialize(const base::Pickle* msg,
base::PickleIterator* iter) {
return ReadHeader(msg, iter) && ReadHandles(msg, iter);
}
void ResourceMessageParams::WriteHeader(base::Pickle* msg) const {
IPC::WriteParam(msg, pp_resource_);
IPC::WriteParam(msg, sequence_);
}
void ResourceMessageParams::WriteHandles(base::Pickle* msg) const {
IPC::WriteParam(msg, handles_->data());
}
bool ResourceMessageParams::ReadHeader(const base::Pickle* msg,
base::PickleIterator* iter) {
DCHECK(handles_->data().empty());
handles_->set_should_close(true);
return IPC::ReadParam(msg, iter, &pp_resource_) &&
IPC::ReadParam(msg, iter, &sequence_);
}
bool ResourceMessageParams::ReadHandles(const base::Pickle* msg,
base::PickleIterator* iter) {
return IPC::ReadParam(msg, iter, &handles_->data());
}
void ResourceMessageParams::ConsumeHandles() const {
// Note: we must not invalidate the handles. This is used for converting
// handles from the host OS to NaCl, and that conversion will not work if we
// invalidate the handles (see HandleConverter).
handles_->set_should_close(false);
}
SerializedHandle ResourceMessageParams::TakeHandleOfTypeAtIndex(
size_t index,
SerializedHandle::Type type) const {
SerializedHandle handle;
std::vector<SerializedHandle>& data = handles_->data();
if (index < data.size() && data[index].type() == type)
handle = std::move(data[index]);
return handle;
}
bool ResourceMessageParams::TakeReadOnlySharedMemoryRegionAtIndex(
size_t index,
base::ReadOnlySharedMemoryRegion* region) const {
SerializedHandle serialized =
TakeHandleOfTypeAtIndex(index, SerializedHandle::SHARED_MEMORY_REGION);
if (!serialized.is_shmem_region())
return false;
*region = base::ReadOnlySharedMemoryRegion::Deserialize(
serialized.TakeSharedMemoryRegion());
return true;
}
bool ResourceMessageParams::TakeUnsafeSharedMemoryRegionAtIndex(
size_t index,
base::UnsafeSharedMemoryRegion* region) const {
SerializedHandle serialized =
TakeHandleOfTypeAtIndex(index, SerializedHandle::SHARED_MEMORY_REGION);
if (!serialized.is_shmem_region())
return false;
*region = base::UnsafeSharedMemoryRegion::Deserialize(
serialized.TakeSharedMemoryRegion());
return true;
}
bool ResourceMessageParams::TakeSocketHandleAtIndex(
size_t index,
IPC::PlatformFileForTransit* handle) const {
SerializedHandle serialized = TakeHandleOfTypeAtIndex(
index, SerializedHandle::SOCKET);
if (!serialized.is_socket())
return false;
*handle = serialized.descriptor();
return true;
}
bool ResourceMessageParams::TakeFileHandleAtIndex(
size_t index,
IPC::PlatformFileForTransit* handle) const {
SerializedHandle serialized = TakeHandleOfTypeAtIndex(
index, SerializedHandle::FILE);
if (!serialized.is_file())
return false;
*handle = serialized.descriptor();
return true;
}
void ResourceMessageParams::TakeAllHandles(
std::vector<SerializedHandle>* handles) const {
std::vector<SerializedHandle>& data = handles_->data();
for (size_t i = 0; i < data.size(); ++i)
handles->push_back(std::move(data[i]));
}
void ResourceMessageParams::AppendHandle(SerializedHandle handle) const {
handles_->data().push_back(std::move(handle));
}
ResourceMessageCallParams::ResourceMessageCallParams()
: ResourceMessageParams(), has_callback_(false) {}
ResourceMessageCallParams::ResourceMessageCallParams(PP_Resource resource,
int32_t sequence)
: ResourceMessageParams(resource, sequence), has_callback_(false) {}
ResourceMessageCallParams::~ResourceMessageCallParams() {
}
void ResourceMessageCallParams::Serialize(base::Pickle* msg) const {
ResourceMessageParams::Serialize(msg);
IPC::WriteParam(msg, has_callback_);
}
bool ResourceMessageCallParams::Deserialize(const base::Pickle* msg,
base::PickleIterator* iter) {
if (!ResourceMessageParams::Deserialize(msg, iter))
return false;
return IPC::ReadParam(msg, iter, &has_callback_);
}
ResourceMessageReplyParams::ResourceMessageReplyParams()
: ResourceMessageParams(),
result_(PP_OK) {
}
ResourceMessageReplyParams::ResourceMessageReplyParams(PP_Resource resource,
int32_t sequence)
: ResourceMessageParams(resource, sequence),
result_(PP_OK) {
}
ResourceMessageReplyParams::~ResourceMessageReplyParams() {
}
void ResourceMessageReplyParams::Serialize(base::Pickle* msg) const {
// Rather than serialize all of ResourceMessageParams first, we serialize all
// non-handle data first, then the handles. When transferring to NaCl on
// Windows, we need to be able to translate Windows-style handles to POSIX-
// style handles, and it's easier to put all the regular stuff at the front.
WriteReplyHeader(msg);
WriteHandles(msg);
}
bool ResourceMessageReplyParams::Deserialize(const base::Pickle* msg,
base::PickleIterator* iter) {
return (ReadHeader(msg, iter) && IPC::ReadParam(msg, iter, &result_) &&
ReadHandles(msg, iter));
}
void ResourceMessageReplyParams::WriteReplyHeader(base::Pickle* msg) const {
WriteHeader(msg);
IPC::WriteParam(msg, result_);
}
} // namespace proxy
} // namespace ppapi
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