summaryrefslogtreecommitdiffstats
path: root/toolkit/xre/nsUpdateSyncManager.cpp
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 17:32:43 +0000
commit6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch)
treea68f146d7fa01f0134297619fbe7e33db084e0aa /toolkit/xre/nsUpdateSyncManager.cpp
parentInitial commit. (diff)
downloadthunderbird-upstream.tar.xz
thunderbird-upstream.zip
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'toolkit/xre/nsUpdateSyncManager.cpp')
-rw-r--r--toolkit/xre/nsUpdateSyncManager.cpp129
1 files changed, 129 insertions, 0 deletions
diff --git a/toolkit/xre/nsUpdateSyncManager.cpp b/toolkit/xre/nsUpdateSyncManager.cpp
new file mode 100644
index 0000000000..b2f6d4247b
--- /dev/null
+++ b/toolkit/xre/nsUpdateSyncManager.cpp
@@ -0,0 +1,129 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:set ts=2 sw=2 sts=2 et cindent: */
+/* 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 "nsUpdateSyncManager.h"
+
+#include "mozilla/Unused.h"
+#include "mozilla/Services.h"
+#include "nsComponentManagerUtils.h"
+#include "nsCRT.h"
+#include "nsIFile.h"
+#include "nsIObserverService.h"
+#include "nsIProperties.h"
+#include "nsString.h"
+#include "nsXULAppAPI.h"
+
+// The lock code generates a path that already includes the vendor name,
+// so this only needs to name the specific lock.
+#define UPDATE_LOCK_NAME_TOKEN "UpdateLock"
+
+nsUpdateSyncManager* gUpdateSyncManager = nullptr;
+
+NS_IMPL_ISUPPORTS(nsUpdateSyncManager, nsIUpdateSyncManager, nsIObserver)
+
+nsUpdateSyncManager::nsUpdateSyncManager(nsIFile* anAppFile /* = nullptr */) {
+ gUpdateSyncManager = this;
+ OpenLock(anAppFile);
+}
+
+nsUpdateSyncManager::~nsUpdateSyncManager() {
+ ReleaseLock();
+ gUpdateSyncManager = nullptr;
+}
+
+already_AddRefed<nsUpdateSyncManager> nsUpdateSyncManager::GetSingleton() {
+ if (!gUpdateSyncManager) {
+ new nsUpdateSyncManager(); // This sets gUpdateSyncManager.
+ }
+ return do_AddRef(gUpdateSyncManager);
+}
+
+NS_IMETHODIMP nsUpdateSyncManager::Observe(nsISupports* aSubject,
+ const char* aTopic,
+ const char16_t* aData) {
+ mozilla::Unused << aSubject;
+ mozilla::Unused << aData;
+
+ // We want to hold the lock for as much of the lifetime of the app as we can,
+ // so we observe xpcom-startup so we get constructed as early as possible,
+ // which triggers constructing the singleton.
+ if (!nsCRT::strcmp(aTopic, NS_XPCOM_STARTUP_OBSERVER_ID)) {
+ nsCOMPtr<nsIObserverService> observerService =
+ mozilla::services::GetObserverService();
+ if (observerService) {
+ return observerService->AddObserver(this, NS_XPCOM_SHUTDOWN_OBSERVER_ID,
+ false);
+ }
+ return NS_ERROR_SERVICE_NOT_AVAILABLE;
+ }
+ if (!nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
+ ReleaseLock();
+ }
+
+ return NS_OK;
+}
+
+nsresult nsUpdateSyncManager::OpenLock(nsIFile* anAppFile) {
+ nsresult rv;
+ if (mLock != MULTI_INSTANCE_LOCK_HANDLE_ERROR) {
+ // Lock is already open.
+ return NS_OK;
+ }
+
+ // Our component registration should already have made sure of this.
+ if (NS_WARN_IF(XRE_GetProcessType() != GeckoProcessType_Default)) {
+ return NS_OK;
+ }
+
+ nsCOMPtr<nsIFile> appFile = mozilla::GetNormalizedAppFile(anAppFile);
+ if (!appFile) {
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+
+ nsCOMPtr<nsIFile> appDirFile;
+ rv = appFile->GetParent(getter_AddRefs(appDirFile));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsAutoString appDirPath;
+ rv = appDirFile->GetPath(appDirPath);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ mLock =
+ mozilla::OpenMultiInstanceLock(UPDATE_LOCK_NAME_TOKEN, appDirPath.get());
+ NS_ENSURE_TRUE(mLock, NS_ERROR_FAILURE);
+
+ return NS_OK;
+}
+
+void nsUpdateSyncManager::ReleaseLock() {
+ if (mLock == MULTI_INSTANCE_LOCK_HANDLE_ERROR) {
+ // Lock is already released.
+ return;
+ }
+
+ mozilla::ReleaseMultiInstanceLock(mLock);
+ mLock = MULTI_INSTANCE_LOCK_HANDLE_ERROR;
+}
+
+NS_IMETHODIMP nsUpdateSyncManager::IsOtherInstanceRunning(bool* aResult) {
+ if (NS_WARN_IF(XRE_GetProcessType() != GeckoProcessType_Default)) {
+ return NS_ERROR_SERVICE_NOT_AVAILABLE;
+ }
+
+ if (mLock == MULTI_INSTANCE_LOCK_HANDLE_ERROR) {
+ return NS_ERROR_NOT_INITIALIZED;
+ }
+
+ bool rv = mozilla::IsOtherInstanceRunning(mLock, aResult);
+ NS_ENSURE_TRUE(rv, NS_ERROR_FAILURE);
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP nsUpdateSyncManager::ResetLock(nsIFile* anAppFile = nullptr) {
+ ReleaseLock();
+ return OpenLock(anAppFile);
+}