gecko-dev/dom/media/gmp/GMPStorageChild.cpp

380 строки
8.4 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "GMPStorageChild.h"
#include "GMPChild.h"
#include "gmp-storage.h"
#define ON_GMP_THREAD() (mPlugin->GMPMessageLoop() == MessageLoop::current())
#define CALL_ON_GMP_THREAD(_func, ...) \
do { \
if (ON_GMP_THREAD()) { \
_func(__VA_ARGS__); \
} else { \
mPlugin->GMPMessageLoop()->PostTask( \
FROM_HERE, NewRunnableMethod(this, &GMPStorageChild::_func, ##__VA_ARGS__) \
); \
} \
} while(false)
static nsTArray<uint8_t>
ToArray(const uint8_t* aData, uint32_t aDataSize)
{
nsTArray<uint8_t> data;
data.AppendElements(aData, aDataSize);
return mozilla::Move(data);
}
namespace mozilla {
namespace gmp {
GMPRecordImpl::GMPRecordImpl(GMPStorageChild* aOwner,
const nsCString& aName,
GMPRecordClient* aClient)
: mName(aName)
, mClient(aClient)
, mOwner(aOwner)
{
}
GMPErr
GMPRecordImpl::Open()
{
return mOwner->Open(this);
}
void
GMPRecordImpl::OpenComplete(GMPErr aStatus)
{
mClient->OpenComplete(aStatus);
}
GMPErr
GMPRecordImpl::Read()
{
return mOwner->Read(this);
}
void
GMPRecordImpl::ReadComplete(GMPErr aStatus,
const uint8_t* aBytes,
uint32_t aLength)
{
mClient->ReadComplete(aStatus, aBytes, aLength);
}
GMPErr
GMPRecordImpl::Write(const uint8_t* aData, uint32_t aDataSize)
{
return mOwner->Write(this, aData, aDataSize);
}
void
GMPRecordImpl::WriteComplete(GMPErr aStatus)
{
mClient->WriteComplete(aStatus);
}
GMPErr
GMPRecordImpl::Close()
{
RefPtr<GMPRecordImpl> kungfuDeathGrip(this);
// Delete our self reference.
Release();
mOwner->Close(this->Name());
return GMPNoErr;
}
GMPStorageChild::GMPStorageChild(GMPChild* aPlugin)
: mMonitor("GMPStorageChild")
, mPlugin(aPlugin)
, mShutdown(false)
{
MOZ_ASSERT(ON_GMP_THREAD());
}
GMPErr
GMPStorageChild::CreateRecord(const nsCString& aRecordName,
GMPRecord** aOutRecord,
GMPRecordClient* aClient)
{
MonitorAutoLock lock(mMonitor);
if (mShutdown) {
NS_WARNING("GMPStorage used after it's been shutdown!");
return GMPClosedErr;
}
MOZ_ASSERT(aRecordName.Length() && aOutRecord);
if (HasRecord(aRecordName)) {
return GMPRecordInUse;
}
RefPtr<GMPRecordImpl> record(new GMPRecordImpl(this, aRecordName, aClient));
mRecords.Put(aRecordName, record); // Addrefs
// The GMPRecord holds a self reference until the GMP calls Close() on
// it. This means the object is always valid (even if neutered) while
// the GMP expects it to be.
record.forget(aOutRecord);
return GMPNoErr;
}
bool
GMPStorageChild::HasRecord(const nsCString& aRecordName)
{
mMonitor.AssertCurrentThreadOwns();
return mRecords.Contains(aRecordName);
}
already_AddRefed<GMPRecordImpl>
GMPStorageChild::GetRecord(const nsCString& aRecordName)
{
MonitorAutoLock lock(mMonitor);
RefPtr<GMPRecordImpl> record;
mRecords.Get(aRecordName, getter_AddRefs(record));
return record.forget();
}
GMPErr
GMPStorageChild::Open(GMPRecordImpl* aRecord)
{
MonitorAutoLock lock(mMonitor);
if (mShutdown) {
NS_WARNING("GMPStorage used after it's been shutdown!");
return GMPClosedErr;
}
if (!HasRecord(aRecord->Name())) {
// Trying to re-open a record that has already been closed.
return GMPClosedErr;
}
CALL_ON_GMP_THREAD(SendOpen, aRecord->Name());
return GMPNoErr;
}
GMPErr
GMPStorageChild::Read(GMPRecordImpl* aRecord)
{
MonitorAutoLock lock(mMonitor);
if (mShutdown) {
NS_WARNING("GMPStorage used after it's been shutdown!");
return GMPClosedErr;
}
if (!HasRecord(aRecord->Name())) {
// Record not opened.
return GMPClosedErr;
}
CALL_ON_GMP_THREAD(SendRead, aRecord->Name());
return GMPNoErr;
}
GMPErr
GMPStorageChild::Write(GMPRecordImpl* aRecord,
const uint8_t* aData,
uint32_t aDataSize)
{
if (aDataSize > GMP_MAX_RECORD_SIZE) {
return GMPQuotaExceededErr;
}
MonitorAutoLock lock(mMonitor);
if (mShutdown) {
NS_WARNING("GMPStorage used after it's been shutdown!");
return GMPClosedErr;
}
if (!HasRecord(aRecord->Name())) {
// Record not opened.
return GMPClosedErr;
}
CALL_ON_GMP_THREAD(SendWrite, aRecord->Name(), ToArray(aData, aDataSize));
return GMPNoErr;
}
GMPErr
GMPStorageChild::Close(const nsCString& aRecordName)
{
MonitorAutoLock lock(mMonitor);
if (!HasRecord(aRecordName)) {
// Already closed.
return GMPClosedErr;
}
mRecords.Remove(aRecordName);
if (!mShutdown) {
CALL_ON_GMP_THREAD(SendClose, aRecordName);
}
return GMPNoErr;
}
bool
GMPStorageChild::RecvOpenComplete(const nsCString& aRecordName,
const GMPErr& aStatus)
{
// We don't need a lock to read |mShutdown| since it is only changed in
// the GMP thread.
if (mShutdown) {
return true;
}
RefPtr<GMPRecordImpl> record = GetRecord(aRecordName);
if (!record) {
// Not fatal.
return true;
}
record->OpenComplete(aStatus);
return true;
}
bool
GMPStorageChild::RecvReadComplete(const nsCString& aRecordName,
const GMPErr& aStatus,
InfallibleTArray<uint8_t>&& aBytes)
{
if (mShutdown) {
return true;
}
RefPtr<GMPRecordImpl> record = GetRecord(aRecordName);
if (!record) {
// Not fatal.
return true;
}
record->ReadComplete(aStatus, aBytes.Elements(), aBytes.Length());
return true;
}
bool
GMPStorageChild::RecvWriteComplete(const nsCString& aRecordName,
const GMPErr& aStatus)
{
if (mShutdown) {
return true;
}
RefPtr<GMPRecordImpl> record = GetRecord(aRecordName);
if (!record) {
// Not fatal.
return true;
}
record->WriteComplete(aStatus);
return true;
}
GMPErr
GMPStorageChild::EnumerateRecords(RecvGMPRecordIteratorPtr aRecvIteratorFunc,
void* aUserArg)
{
MonitorAutoLock lock(mMonitor);
if (mShutdown) {
NS_WARNING("GMPStorage used after it's been shutdown!");
return GMPClosedErr;
}
MOZ_ASSERT(aRecvIteratorFunc);
mPendingRecordIterators.push(RecordIteratorContext(aRecvIteratorFunc, aUserArg));
CALL_ON_GMP_THREAD(SendGetRecordNames);
return GMPNoErr;
}
class GMPRecordIteratorImpl : public GMPRecordIterator {
public:
explicit GMPRecordIteratorImpl(const InfallibleTArray<nsCString>& aRecordNames)
: mRecordNames(aRecordNames)
, mIndex(0)
{
mRecordNames.Sort();
}
GMPErr GetName(const char** aOutName, uint32_t* aOutNameLength) override {
if (!aOutName || !aOutNameLength) {
return GMPInvalidArgErr;
}
if (mIndex == mRecordNames.Length()) {
return GMPEndOfEnumeration;
}
*aOutName = mRecordNames[mIndex].get();
*aOutNameLength = mRecordNames[mIndex].Length();
return GMPNoErr;
}
GMPErr NextRecord() override {
if (mIndex < mRecordNames.Length()) {
mIndex++;
}
return (mIndex < mRecordNames.Length()) ? GMPNoErr
: GMPEndOfEnumeration;
}
void Close() override {
delete this;
}
private:
nsTArray<nsCString> mRecordNames;
size_t mIndex;
};
bool
GMPStorageChild::RecvRecordNames(InfallibleTArray<nsCString>&& aRecordNames,
const GMPErr& aStatus)
{
RecordIteratorContext ctx;
{
MonitorAutoLock lock(mMonitor);
if (mShutdown || mPendingRecordIterators.empty()) {
return true;
}
ctx = mPendingRecordIterators.front();
mPendingRecordIterators.pop();
}
if (GMP_FAILED(aStatus)) {
ctx.mFunc(nullptr, ctx.mUserArg, aStatus);
} else {
ctx.mFunc(new GMPRecordIteratorImpl(aRecordNames), ctx.mUserArg, GMPNoErr);
}
return true;
}
bool
GMPStorageChild::RecvShutdown()
{
// Block any new storage requests, and thus any messages back to the
// parent. We don't delete any objects here, as that may invalidate
// GMPRecord pointers held by the GMP.
MonitorAutoLock lock(mMonitor);
mShutdown = true;
while (!mPendingRecordIterators.empty()) {
mPendingRecordIterators.pop();
}
return true;
}
} // namespace gmp
} // namespace mozilla
// avoid redefined macro in unified build
#undef ON_GMP_THREAD
#undef CALL_ON_GMP_THREAD