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-rw-r--r--netwerk/cache2/CachePurgeLock.cpp115
1 files changed, 115 insertions, 0 deletions
diff --git a/netwerk/cache2/CachePurgeLock.cpp b/netwerk/cache2/CachePurgeLock.cpp
new file mode 100644
index 0000000000..6328891669
--- /dev/null
+++ b/netwerk/cache2/CachePurgeLock.cpp
@@ -0,0 +1,115 @@
+/* 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 "CachePurgeLock.h"
+#include "nsCOMPtr.h"
+#include "nsIFile.h"
+#include "nsAppRunner.h"
+#include "mozilla/MultiInstanceLock.h"
+#include "nsLocalFile.h"
+
+namespace mozilla::net {
+
+NS_IMPL_ISUPPORTS(CachePurgeLock, nsICachePurgeLock)
+
+static nsresult PrepareLockArguments(const nsACString& profileName,
+ nsCString& lockName,
+ nsString& appDirPath) {
+ nsresult rv;
+
+ nsCOMPtr<nsIFile> appFile = mozilla::GetNormalizedAppFile(nullptr);
+ if (!appFile) {
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+
+ nsCOMPtr<nsIFile> appDirFile;
+ rv = appFile->GetParent(getter_AddRefs(appDirFile));
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ rv = appDirFile->GetPath(appDirPath);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ lockName = profileName;
+ lockName.Append("-cachePurge");
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+CachePurgeLock::GetLockFile(const nsACString& profileName, nsIFile** aResult) {
+ nsresult rv;
+ nsCString lockName;
+ nsString appDirPath;
+ rv = PrepareLockArguments(profileName, lockName, appDirPath);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ nsCString filePath;
+ if (!GetMultiInstanceLockFileName(lockName.get(), appDirPath.get(),
+ filePath)) {
+ return NS_ERROR_NOT_AVAILABLE;
+ }
+
+ nsCOMPtr<nsIFile> lockFile = new nsLocalFile();
+ rv = lockFile->InitWithNativePath(filePath);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ lockFile.forget(aResult);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+CachePurgeLock::Lock(const nsACString& profileName) {
+ nsresult rv;
+ if (mLock != MULTI_INSTANCE_LOCK_HANDLE_ERROR) {
+ // Lock is already open.
+ return NS_OK;
+ }
+
+ nsCString lockName;
+ nsString appDirPath;
+ rv = PrepareLockArguments(profileName, lockName, appDirPath);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ mLock = mozilla::OpenMultiInstanceLock(lockName.get(), appDirPath.get());
+ if (mLock == MULTI_INSTANCE_LOCK_HANDLE_ERROR) {
+ return NS_ERROR_FAILURE;
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+CachePurgeLock::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
+CachePurgeLock::Unlock() {
+ if (mLock == MULTI_INSTANCE_LOCK_HANDLE_ERROR) {
+ // Lock is already released.
+ return NS_OK;
+ }
+
+ mozilla::ReleaseMultiInstanceLock(mLock);
+ mLock = MULTI_INSTANCE_LOCK_HANDLE_ERROR;
+
+ return NS_OK;
+}
+
+} // namespace mozilla::net