mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
688 lines
20 KiB
C++
688 lines
20 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "TransactionThreadPool.h"
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#include "nsIObserverService.h"
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#include "nsIThreadPool.h"
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#include "nsComponentManagerUtils.h"
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#include "nsThreadUtils.h"
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#include "nsServiceManagerUtils.h"
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#include "nsXPCOMCIDInternal.h"
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using mozilla::MonitorAutoLock;
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USING_INDEXEDDB_NAMESPACE
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namespace {
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const PRUint32 kThreadLimit = 20;
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const PRUint32 kIdleThreadLimit = 5;
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const PRUint32 kIdleThreadTimeoutMs = 30000;
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TransactionThreadPool* gInstance = nullptr;
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bool gShutdown = false;
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inline
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nsresult
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CheckOverlapAndMergeObjectStores(nsTArray<nsString>& aLockedStores,
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const nsTArray<nsString>& aObjectStores,
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bool aShouldMerge,
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bool* aStoresOverlap)
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{
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PRUint32 length = aObjectStores.Length();
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bool overlap = false;
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for (PRUint32 index = 0; index < length; index++) {
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const nsString& storeName = aObjectStores[index];
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if (aLockedStores.Contains(storeName)) {
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overlap = true;
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}
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else if (aShouldMerge && !aLockedStores.AppendElement(storeName)) {
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NS_WARNING("Out of memory!");
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return NS_ERROR_OUT_OF_MEMORY;
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}
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}
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*aStoresOverlap = overlap;
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return NS_OK;
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}
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} // anonymous namespace
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BEGIN_INDEXEDDB_NAMESPACE
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class FinishTransactionRunnable MOZ_FINAL : public nsIRunnable
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIRUNNABLE
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inline FinishTransactionRunnable(IDBTransaction* aTransaction,
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nsCOMPtr<nsIRunnable>& aFinishRunnable);
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private:
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IDBTransaction* mTransaction;
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nsCOMPtr<nsIRunnable> mFinishRunnable;
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};
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END_INDEXEDDB_NAMESPACE
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TransactionThreadPool::TransactionThreadPool()
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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NS_ASSERTION(!gInstance, "More than one instance!");
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}
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TransactionThreadPool::~TransactionThreadPool()
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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NS_ASSERTION(gInstance == this, "Different instances!");
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gInstance = nullptr;
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}
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// static
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TransactionThreadPool*
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TransactionThreadPool::GetOrCreate()
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{
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if (!gInstance && !gShutdown) {
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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nsAutoPtr<TransactionThreadPool> pool(new TransactionThreadPool());
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nsresult rv = pool->Init();
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NS_ENSURE_SUCCESS(rv, nullptr);
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gInstance = pool.forget();
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}
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return gInstance;
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}
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// static
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TransactionThreadPool*
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TransactionThreadPool::Get()
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{
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return gInstance;
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}
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// static
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void
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TransactionThreadPool::Shutdown()
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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gShutdown = true;
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if (gInstance) {
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if (NS_FAILED(gInstance->Cleanup())) {
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NS_WARNING("Failed to shutdown thread pool!");
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}
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delete gInstance;
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gInstance = nullptr;
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}
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}
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nsresult
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TransactionThreadPool::Init()
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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mTransactionsInProgress.Init();
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nsresult rv;
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mThreadPool = do_CreateInstance(NS_THREADPOOL_CONTRACTID, &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mThreadPool->SetName(NS_LITERAL_CSTRING("IndexedDB Trans"));
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mThreadPool->SetThreadLimit(kThreadLimit);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mThreadPool->SetIdleThreadLimit(kIdleThreadLimit);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mThreadPool->SetIdleThreadTimeout(kIdleThreadTimeoutMs);
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NS_ENSURE_SUCCESS(rv, rv);
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return NS_OK;
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}
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nsresult
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TransactionThreadPool::Cleanup()
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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nsresult rv = mThreadPool->Shutdown();
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NS_ENSURE_SUCCESS(rv, rv);
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// Make sure the pool is still accessible while any callbacks generated from
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// the other threads are processed.
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rv = NS_ProcessPendingEvents(nullptr);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!mCompleteCallbacks.IsEmpty()) {
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// Run all callbacks manually now.
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for (PRUint32 index = 0; index < mCompleteCallbacks.Length(); index++) {
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mCompleteCallbacks[index].mCallback->Run();
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}
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mCompleteCallbacks.Clear();
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// And make sure they get processed.
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rv = NS_ProcessPendingEvents(nullptr);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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return NS_OK;
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}
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void
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TransactionThreadPool::FinishTransaction(IDBTransaction* aTransaction)
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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NS_ASSERTION(aTransaction, "Null pointer!");
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// AddRef here because removing from the hash will call Release.
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nsRefPtr<IDBTransaction> transaction(aTransaction);
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nsIAtom* databaseId = aTransaction->mDatabase->Id();
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DatabaseTransactionInfo* dbTransactionInfo;
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if (!mTransactionsInProgress.Get(databaseId, &dbTransactionInfo)) {
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NS_ERROR("We don't know anyting about this database?!");
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return;
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}
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nsTArray<TransactionInfo>& transactionsInProgress =
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dbTransactionInfo->transactions;
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PRUint32 transactionCount = transactionsInProgress.Length();
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#ifdef DEBUG
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if (aTransaction->mMode == IDBTransaction::VERSION_CHANGE) {
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NS_ASSERTION(transactionCount == 1,
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"More transactions running than should be!");
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}
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#endif
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if (transactionCount == 1) {
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#ifdef DEBUG
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{
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TransactionInfo& info = transactionsInProgress[0];
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NS_ASSERTION(info.transaction == aTransaction, "Transaction mismatch!");
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}
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#endif
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mTransactionsInProgress.Remove(databaseId);
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// See if we need to fire any complete callbacks.
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PRUint32 index = 0;
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while (index < mCompleteCallbacks.Length()) {
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if (MaybeFireCallback(mCompleteCallbacks[index])) {
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mCompleteCallbacks.RemoveElementAt(index);
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}
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else {
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index++;
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}
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}
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}
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else {
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// We need to rebuild the locked object store list.
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nsTArray<nsString> storesWriting, storesReading;
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for (PRUint32 index = 0, count = transactionCount; index < count; index++) {
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IDBTransaction* transaction = transactionsInProgress[index].transaction;
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if (transaction == aTransaction) {
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NS_ASSERTION(count == transactionCount, "More than one match?!");
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transactionsInProgress.RemoveElementAt(index);
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index--;
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count--;
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continue;
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}
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const nsTArray<nsString>& objectStores = transaction->mObjectStoreNames;
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bool dummy;
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if (transaction->mMode == IDBTransaction::READ_WRITE) {
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if (NS_FAILED(CheckOverlapAndMergeObjectStores(storesWriting,
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objectStores,
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true, &dummy))) {
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NS_WARNING("Out of memory!");
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}
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}
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else if (transaction->mMode == IDBTransaction::READ_ONLY) {
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if (NS_FAILED(CheckOverlapAndMergeObjectStores(storesReading,
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objectStores,
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true, &dummy))) {
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NS_WARNING("Out of memory!");
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}
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}
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else {
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NS_NOTREACHED("Unknown mode!");
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}
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}
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NS_ASSERTION(transactionsInProgress.Length() == transactionCount - 1,
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"Didn't find the transaction we were looking for!");
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dbTransactionInfo->storesWriting.SwapElements(storesWriting);
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dbTransactionInfo->storesReading.SwapElements(storesReading);
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}
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// Try to dispatch all the queued transactions again.
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nsTArray<QueuedDispatchInfo> queuedDispatch;
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queuedDispatch.SwapElements(mDelayedDispatchQueue);
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transactionCount = queuedDispatch.Length();
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for (PRUint32 index = 0; index < transactionCount; index++) {
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if (NS_FAILED(Dispatch(queuedDispatch[index]))) {
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NS_WARNING("Dispatch failed!");
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}
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}
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}
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nsresult
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TransactionThreadPool::TransactionCanRun(IDBTransaction* aTransaction,
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bool* aCanRun,
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TransactionQueue** aExistingQueue)
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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NS_ASSERTION(aTransaction, "Null pointer!");
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NS_ASSERTION(aCanRun, "Null pointer!");
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NS_ASSERTION(aExistingQueue, "Null pointer!");
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nsIAtom* databaseId = aTransaction->mDatabase->Id();
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const nsTArray<nsString>& objectStoreNames = aTransaction->mObjectStoreNames;
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const PRUint16 mode = aTransaction->mMode;
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// See if we can run this transaction now.
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DatabaseTransactionInfo* dbTransactionInfo;
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if (!mTransactionsInProgress.Get(databaseId, &dbTransactionInfo)) {
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// First transaction for this database, fine to run.
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*aCanRun = true;
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*aExistingQueue = nullptr;
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return NS_OK;
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}
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nsTArray<TransactionInfo>& transactionsInProgress =
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dbTransactionInfo->transactions;
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PRUint32 transactionCount = transactionsInProgress.Length();
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NS_ASSERTION(transactionCount, "Should never be 0!");
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for (PRUint32 index = 0; index < transactionCount; index++) {
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// See if this transaction is in out list of current transactions.
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const TransactionInfo& info = transactionsInProgress[index];
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if (info.transaction == aTransaction) {
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*aCanRun = true;
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*aExistingQueue = info.queue;
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return NS_OK;
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}
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}
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NS_ASSERTION(mode != IDBTransaction::VERSION_CHANGE, "How did we get here?");
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bool writeOverlap;
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nsresult rv =
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CheckOverlapAndMergeObjectStores(dbTransactionInfo->storesWriting,
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objectStoreNames,
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mode == IDBTransaction::READ_WRITE,
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&writeOverlap);
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NS_ENSURE_SUCCESS(rv, rv);
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bool readOverlap;
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rv = CheckOverlapAndMergeObjectStores(dbTransactionInfo->storesReading,
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objectStoreNames,
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mode == IDBTransaction::READ_ONLY,
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&readOverlap);
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NS_ENSURE_SUCCESS(rv, rv);
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if (writeOverlap ||
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(readOverlap && mode == IDBTransaction::READ_WRITE)) {
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*aCanRun = false;
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*aExistingQueue = nullptr;
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return NS_OK;
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}
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*aCanRun = true;
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*aExistingQueue = nullptr;
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return NS_OK;
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}
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nsresult
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TransactionThreadPool::Dispatch(IDBTransaction* aTransaction,
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nsIRunnable* aRunnable,
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bool aFinish,
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nsIRunnable* aFinishRunnable)
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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NS_ASSERTION(aTransaction, "Null pointer!");
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NS_ASSERTION(aRunnable, "Null pointer!");
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if (aTransaction->mDatabase->IsInvalidated() && !aFinish) {
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return NS_ERROR_NOT_AVAILABLE;
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}
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bool canRun;
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TransactionQueue* existingQueue;
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nsresult rv = TransactionCanRun(aTransaction, &canRun, &existingQueue);
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NS_ENSURE_SUCCESS(rv, rv);
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if (!canRun) {
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QueuedDispatchInfo* info = mDelayedDispatchQueue.AppendElement();
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NS_ENSURE_TRUE(info, NS_ERROR_OUT_OF_MEMORY);
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info->transaction = aTransaction;
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info->runnable = aRunnable;
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info->finish = aFinish;
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info->finishRunnable = aFinishRunnable;
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return NS_OK;
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}
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if (existingQueue) {
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existingQueue->Dispatch(aRunnable);
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if (aFinish) {
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existingQueue->Finish(aFinishRunnable);
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}
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return NS_OK;
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}
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nsIAtom* databaseId = aTransaction->mDatabase->Id();
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#ifdef DEBUG
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if (aTransaction->mMode == IDBTransaction::VERSION_CHANGE) {
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NS_ASSERTION(!mTransactionsInProgress.Get(databaseId, nullptr),
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"Shouldn't have anything in progress!");
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}
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#endif
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DatabaseTransactionInfo* dbTransactionInfo;
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nsAutoPtr<DatabaseTransactionInfo> autoDBTransactionInfo;
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if (!mTransactionsInProgress.Get(databaseId, &dbTransactionInfo)) {
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// Make a new struct for this transaction.
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autoDBTransactionInfo = new DatabaseTransactionInfo();
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dbTransactionInfo = autoDBTransactionInfo;
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}
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const nsTArray<nsString>& objectStoreNames = aTransaction->mObjectStoreNames;
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nsTArray<nsString>& storesInUse =
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aTransaction->mMode == IDBTransaction::READ_WRITE ?
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dbTransactionInfo->storesWriting :
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dbTransactionInfo->storesReading;
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if (!storesInUse.AppendElements(objectStoreNames)) {
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NS_WARNING("Out of memory!");
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return NS_ERROR_OUT_OF_MEMORY;
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}
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nsTArray<TransactionInfo>& transactionInfoArray =
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dbTransactionInfo->transactions;
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TransactionInfo* transactionInfo = transactionInfoArray.AppendElement();
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NS_ENSURE_TRUE(transactionInfo, NS_ERROR_OUT_OF_MEMORY);
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transactionInfo->transaction = aTransaction;
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transactionInfo->queue = new TransactionQueue(aTransaction, aRunnable);
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if (aFinish) {
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transactionInfo->queue->Finish(aFinishRunnable);
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}
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if (!transactionInfo->objectStoreNames.AppendElements(objectStoreNames)) {
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NS_WARNING("Out of memory!");
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return NS_ERROR_OUT_OF_MEMORY;
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}
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if (autoDBTransactionInfo) {
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mTransactionsInProgress.Put(databaseId, autoDBTransactionInfo);
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autoDBTransactionInfo.forget();
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}
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return mThreadPool->Dispatch(transactionInfo->queue, NS_DISPATCH_NORMAL);
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}
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bool
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TransactionThreadPool::WaitForAllDatabasesToComplete(
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nsTArray<nsRefPtr<IDBDatabase> >& aDatabases,
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nsIRunnable* aCallback)
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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NS_ASSERTION(!aDatabases.IsEmpty(), "No databases to wait on!");
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NS_ASSERTION(aCallback, "Null pointer!");
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DatabasesCompleteCallback* callback = mCompleteCallbacks.AppendElement();
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if (!callback) {
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NS_WARNING("Out of memory!");
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return false;
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}
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callback->mCallback = aCallback;
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if (!callback->mDatabases.SwapElements(aDatabases)) {
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NS_ERROR("This should never fail!");
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}
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if (MaybeFireCallback(*callback)) {
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mCompleteCallbacks.RemoveElementAt(mCompleteCallbacks.Length() - 1);
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}
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return true;
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}
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void
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TransactionThreadPool::AbortTransactionsForDatabase(IDBDatabase* aDatabase)
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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NS_ASSERTION(aDatabase, "Null pointer!");
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// Get list of transactions for this database id
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DatabaseTransactionInfo* dbTransactionInfo;
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if (!mTransactionsInProgress.Get(aDatabase->Id(), &dbTransactionInfo)) {
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// If there are no running transactions, there can't be any pending ones
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return;
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}
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nsAutoTArray<nsRefPtr<IDBTransaction>, 50> transactions;
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// Collect any running transactions
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nsTArray<TransactionInfo>& transactionsInProgress =
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dbTransactionInfo->transactions;
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PRUint32 transactionCount = transactionsInProgress.Length();
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NS_ASSERTION(transactionCount, "Should never be 0!");
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for (PRUint32 index = 0; index < transactionCount; index++) {
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// See if any transaction belongs to this IDBDatabase instance
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IDBTransaction* transaction = transactionsInProgress[index].transaction;
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if (transaction->Database() == aDatabase) {
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transactions.AppendElement(transaction);
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}
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}
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// Collect any pending transactions.
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for (PRUint32 index = 0; index < mDelayedDispatchQueue.Length(); index++) {
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// See if any transaction belongs to this IDBDatabase instance
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IDBTransaction* transaction = mDelayedDispatchQueue[index].transaction;
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if (transaction->Database() == aDatabase) {
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transactions.AppendElement(transaction);
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}
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}
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// Abort transactions. Do this after collecting the transactions in case
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// calling Abort() modifies the data structures we're iterating above.
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for (PRUint32 index = 0; index < transactions.Length(); index++) {
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// This can fail, for example if the transaction is in the process of
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// being comitted. That is expected and fine, so we ignore any returned
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// errors.
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transactions[index]->Abort();
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}
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}
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bool
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TransactionThreadPool::HasTransactionsForDatabase(IDBDatabase* aDatabase)
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{
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NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
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NS_ASSERTION(aDatabase, "Null pointer!");
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// Get list of transactions for this database id
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DatabaseTransactionInfo* dbTransactionInfo;
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if (!mTransactionsInProgress.Get(aDatabase->Id(), &dbTransactionInfo)) {
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return false;
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}
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nsTArray<TransactionInfo>& transactionsInProgress =
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dbTransactionInfo->transactions;
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PRUint32 transactionCount = transactionsInProgress.Length();
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NS_ASSERTION(transactionCount, "Should never be 0!");
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for (PRUint32 index = 0; index < transactionCount; index++) {
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// See if any transaction belongs to this IDBDatabase instance
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if (transactionsInProgress[index].transaction->Database() == aDatabase) {
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return true;
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}
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}
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return false;
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|
}
|
|
|
|
bool
|
|
TransactionThreadPool::MaybeFireCallback(DatabasesCompleteCallback& aCallback)
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
|
|
|
|
for (PRUint32 index = 0; index < aCallback.mDatabases.Length(); index++) {
|
|
if (mTransactionsInProgress.Get(aCallback.mDatabases[index]->Id(),
|
|
nullptr)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
aCallback.mCallback->Run();
|
|
return true;
|
|
}
|
|
|
|
TransactionThreadPool::
|
|
TransactionQueue::TransactionQueue(IDBTransaction* aTransaction,
|
|
nsIRunnable* aRunnable)
|
|
: mMonitor("TransactionQueue::mMonitor"),
|
|
mTransaction(aTransaction),
|
|
mShouldFinish(false)
|
|
{
|
|
NS_ASSERTION(aTransaction, "Null pointer!");
|
|
NS_ASSERTION(aRunnable, "Null pointer!");
|
|
mQueue.AppendElement(aRunnable);
|
|
}
|
|
|
|
void
|
|
TransactionThreadPool::TransactionQueue::Dispatch(nsIRunnable* aRunnable)
|
|
{
|
|
MonitorAutoLock lock(mMonitor);
|
|
|
|
NS_ASSERTION(!mShouldFinish, "Dispatch called after Finish!");
|
|
|
|
mQueue.AppendElement(aRunnable);
|
|
|
|
mMonitor.Notify();
|
|
}
|
|
|
|
void
|
|
TransactionThreadPool::TransactionQueue::Finish(nsIRunnable* aFinishRunnable)
|
|
{
|
|
MonitorAutoLock lock(mMonitor);
|
|
|
|
NS_ASSERTION(!mShouldFinish, "Finish called more than once!");
|
|
|
|
mShouldFinish = true;
|
|
mFinishRunnable = aFinishRunnable;
|
|
|
|
mMonitor.Notify();
|
|
}
|
|
|
|
NS_IMPL_THREADSAFE_ISUPPORTS1(TransactionThreadPool::TransactionQueue,
|
|
nsIRunnable)
|
|
|
|
NS_IMETHODIMP
|
|
TransactionThreadPool::TransactionQueue::Run()
|
|
{
|
|
nsAutoTArray<nsCOMPtr<nsIRunnable>, 10> queue;
|
|
nsCOMPtr<nsIRunnable> finishRunnable;
|
|
bool shouldFinish = false;
|
|
|
|
while(!shouldFinish) {
|
|
NS_ASSERTION(queue.IsEmpty(), "Should have cleared this!");
|
|
|
|
{
|
|
MonitorAutoLock lock(mMonitor);
|
|
while (!mShouldFinish && mQueue.IsEmpty()) {
|
|
if (NS_FAILED(mMonitor.Wait())) {
|
|
NS_ERROR("Failed to wait!");
|
|
}
|
|
}
|
|
|
|
mQueue.SwapElements(queue);
|
|
if (mShouldFinish) {
|
|
mFinishRunnable.swap(finishRunnable);
|
|
shouldFinish = true;
|
|
}
|
|
}
|
|
|
|
PRUint32 count = queue.Length();
|
|
for (PRUint32 index = 0; index < count; index++) {
|
|
nsCOMPtr<nsIRunnable>& runnable = queue[index];
|
|
runnable->Run();
|
|
runnable = nullptr;
|
|
}
|
|
|
|
if (count) {
|
|
queue.Clear();
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIRunnable> finishTransactionRunnable =
|
|
new FinishTransactionRunnable(mTransaction, finishRunnable);
|
|
if (NS_FAILED(NS_DispatchToMainThread(finishTransactionRunnable,
|
|
NS_DISPATCH_NORMAL))) {
|
|
NS_WARNING("Failed to dispatch finishTransactionRunnable!");
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
FinishTransactionRunnable::FinishTransactionRunnable(
|
|
IDBTransaction* aTransaction,
|
|
nsCOMPtr<nsIRunnable>& aFinishRunnable)
|
|
: mTransaction(aTransaction)
|
|
{
|
|
NS_ASSERTION(!NS_IsMainThread(), "Wrong thread!");
|
|
NS_ASSERTION(aTransaction, "Null pointer!");
|
|
mFinishRunnable.swap(aFinishRunnable);
|
|
}
|
|
|
|
NS_IMPL_THREADSAFE_ISUPPORTS1(FinishTransactionRunnable, nsIRunnable)
|
|
|
|
NS_IMETHODIMP
|
|
FinishTransactionRunnable::Run()
|
|
{
|
|
NS_ASSERTION(NS_IsMainThread(), "Wrong thread!");
|
|
if (!gInstance) {
|
|
NS_ERROR("Running after shutdown!");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
gInstance->FinishTransaction(mTransaction);
|
|
|
|
if (mFinishRunnable) {
|
|
mFinishRunnable->Run();
|
|
mFinishRunnable = nullptr;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|