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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /dom/ipc/RefMessageBodyService.cpp
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/ipc/RefMessageBodyService.cpp')
-rw-r--r--dom/ipc/RefMessageBodyService.cpp161
1 files changed, 161 insertions, 0 deletions
diff --git a/dom/ipc/RefMessageBodyService.cpp b/dom/ipc/RefMessageBodyService.cpp
new file mode 100644
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+++ b/dom/ipc/RefMessageBodyService.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "RefMessageBodyService.h"
+
+#include <cstdint>
+#include <cstdlib>
+#include "mozilla/ErrorResult.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/dom/ipc/StructuredCloneData.h"
+#include "nsBaseHashtable.h"
+#include "nsDebug.h"
+
+namespace mozilla::dom {
+
+// Guards sService and its members.
+StaticMutex sRefMessageBodyServiceMutex;
+
+// Raw pointer because the service is kept alive by other objects.
+// See the CTOR and the DTOR of this object.
+RefMessageBodyService* sService;
+
+// static
+already_AddRefed<RefMessageBodyService> RefMessageBodyService::GetOrCreate() {
+ StaticMutexAutoLock lock(sRefMessageBodyServiceMutex);
+
+ RefPtr<RefMessageBodyService> service = GetOrCreateInternal(lock);
+ return service.forget();
+}
+
+// static
+RefMessageBodyService* RefMessageBodyService::GetOrCreateInternal(
+ const StaticMutexAutoLock& aProofOfLock) {
+ if (!sService) {
+ sService = new RefMessageBodyService(aProofOfLock);
+ }
+ return sService;
+}
+
+RefMessageBodyService::RefMessageBodyService(
+ const StaticMutexAutoLock& aProofOfLock) {
+ MOZ_DIAGNOSTIC_ASSERT(sService == nullptr);
+}
+
+RefMessageBodyService::~RefMessageBodyService() {
+ StaticMutexAutoLock lock(sRefMessageBodyServiceMutex);
+ MOZ_DIAGNOSTIC_ASSERT(sService == this);
+ sService = nullptr;
+}
+
+const nsID RefMessageBodyService::Register(
+ already_AddRefed<RefMessageBody> aBody, ErrorResult& aRv) {
+ RefPtr<RefMessageBody> body = aBody;
+ MOZ_ASSERT(body);
+
+ nsID uuid = {};
+ aRv = nsID::GenerateUUIDInPlace(uuid);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nsID();
+ }
+
+ StaticMutexAutoLock lock(sRefMessageBodyServiceMutex);
+ GetOrCreateInternal(lock)->mMessages.InsertOrUpdate(uuid, std::move(body));
+ return uuid;
+}
+
+already_AddRefed<RefMessageBody> RefMessageBodyService::Steal(const nsID& aID) {
+ StaticMutexAutoLock lock(sRefMessageBodyServiceMutex);
+ if (!sService) {
+ return nullptr;
+ }
+
+ RefPtr<RefMessageBody> body;
+ sService->mMessages.Remove(aID, getter_AddRefs(body));
+
+ return body.forget();
+}
+
+already_AddRefed<RefMessageBody> RefMessageBodyService::GetAndCount(
+ const nsID& aID) {
+ StaticMutexAutoLock lock(sRefMessageBodyServiceMutex);
+ if (!sService) {
+ return nullptr;
+ }
+
+ RefPtr<RefMessageBody> body = sService->mMessages.Get(aID);
+ if (!body) {
+ return nullptr;
+ }
+
+ ++body->mCount;
+
+ MOZ_ASSERT_IF(body->mMaxCount.isSome(),
+ body->mCount <= body->mMaxCount.value());
+ if (body->mMaxCount.isSome() && body->mCount >= body->mMaxCount.value()) {
+ sService->mMessages.Remove(aID);
+ }
+
+ return body.forget();
+}
+
+void RefMessageBodyService::SetMaxCount(const nsID& aID, uint32_t aMaxCount) {
+ StaticMutexAutoLock lock(sRefMessageBodyServiceMutex);
+ if (!sService) {
+ return;
+ }
+
+ RefPtr<RefMessageBody> body = sService->mMessages.Get(aID);
+ if (!body) {
+ return;
+ }
+
+ MOZ_ASSERT(body->mMaxCount.isNothing());
+ body->mMaxCount.emplace(aMaxCount);
+
+ MOZ_ASSERT(body->mCount <= body->mMaxCount.value());
+ if (body->mCount >= body->mMaxCount.value()) {
+ sService->mMessages.Remove(aID);
+ }
+}
+
+void RefMessageBodyService::ForgetPort(const nsID& aPortID) {
+ StaticMutexAutoLock lock(sRefMessageBodyServiceMutex);
+ if (!sService) {
+ return;
+ }
+
+ for (auto iter = sService->mMessages.Iter(); !iter.Done(); iter.Next()) {
+ if (iter.UserData()->PortID() == aPortID) {
+ iter.Remove();
+ }
+ }
+}
+
+RefMessageBody::RefMessageBody(const nsID& aPortID,
+ UniquePtr<ipc::StructuredCloneData>&& aCloneData)
+ : mPortID(aPortID),
+ mMutex("RefMessageBody::mMutex"),
+ mCloneData(std::move(aCloneData)),
+ mMaxCount(Nothing()),
+ mCount(0) {}
+
+RefMessageBody::~RefMessageBody() = default;
+
+void RefMessageBody::Read(JSContext* aCx, JS::MutableHandle<JS::Value> aValue,
+ const JS::CloneDataPolicy& aCloneDataPolicy,
+ ErrorResult& aRv) {
+ MutexAutoLock lock(mMutex);
+ mCloneData->Read(aCx, aValue, aCloneDataPolicy, aRv);
+}
+
+bool RefMessageBody::TakeTransferredPortsAsSequence(
+ Sequence<OwningNonNull<mozilla::dom::MessagePort>>& aPorts) {
+ MOZ_ASSERT(mMaxCount.isNothing());
+ return mCloneData->TakeTransferredPortsAsSequence(aPorts);
+}
+
+} // namespace mozilla::dom