summaryrefslogtreecommitdiffstats
path: root/netwerk/cache2/CacheFileContextEvictor.h
diff options
context:
space:
mode:
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 /netwerk/cache2/CacheFileContextEvictor.h
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 '')
-rw-r--r--netwerk/cache2/CacheFileContextEvictor.h100
1 files changed, 100 insertions, 0 deletions
diff --git a/netwerk/cache2/CacheFileContextEvictor.h b/netwerk/cache2/CacheFileContextEvictor.h
new file mode 100644
index 0000000000..518d3b7d5f
--- /dev/null
+++ b/netwerk/cache2/CacheFileContextEvictor.h
@@ -0,0 +1,100 @@
+/* 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/. */
+
+#ifndef CacheFileContextEvictor__h__
+#define CacheFileContextEvictor__h__
+
+#include "mozilla/UniquePtr.h"
+#include "nsCOMPtr.h"
+#include "nsString.h"
+#include "nsTArray.h"
+
+class nsIFile;
+class nsILoadContextInfo;
+
+namespace mozilla {
+namespace net {
+
+class CacheIndexIterator;
+
+struct CacheFileContextEvictorEntry {
+ nsCOMPtr<nsILoadContextInfo> mInfo;
+ bool mPinned = false;
+ nsString mOrigin; // it can be empty
+ PRTime mTimeStamp = 0; // in milliseconds
+ RefPtr<CacheIndexIterator> mIterator;
+};
+
+class CacheFileContextEvictor {
+ public:
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CacheFileContextEvictor)
+
+ CacheFileContextEvictor();
+
+ private:
+ virtual ~CacheFileContextEvictor();
+
+ public:
+ nsresult Init(nsIFile* aCacheDirectory);
+ void Shutdown();
+
+ // Returns number of contexts that are being evicted.
+ uint32_t ContextsCount();
+ // Start evicting given context and an origin, if not empty.
+ nsresult AddContext(nsILoadContextInfo* aLoadContextInfo, bool aPinned,
+ const nsAString& aOrigin);
+ // CacheFileIOManager calls this method when CacheIndex's state changes. We
+ // check whether the index is up to date and start or stop evicting according
+ // to index's state.
+ void CacheIndexStateChanged();
+ // CacheFileIOManager calls this method to check whether an entry file should
+ // be considered as evicted. It returns true when there is a matching context
+ // info to the given key and the last modified time of the entry file is
+ // earlier than the time stamp of the time when the context was added to the
+ // evictor.
+ void WasEvicted(const nsACString& aKey, nsIFile* aFile,
+ bool* aEvictedAsPinned, bool* aEvictedAsNonPinned);
+
+ private:
+ // Writes information about eviction of the given context to the disk. This is
+ // done for every context added to the evictor to be able to recover eviction
+ // after a shutdown or crash. When the context file is found after startup, we
+ // restore mTimeStamp from the last modified time of the file.
+ nsresult PersistEvictionInfoToDisk(nsILoadContextInfo* aLoadContextInfo,
+ bool aPinned, const nsAString& aOrigin);
+ // Once we are done with eviction for the given context, the eviction info is
+ // removed from the disk.
+ nsresult RemoveEvictInfoFromDisk(nsILoadContextInfo* aLoadContextInfo,
+ bool aPinned, const nsAString& aOrigin);
+ // Tries to load all contexts from the disk. This method is called just once
+ // after startup.
+ nsresult LoadEvictInfoFromDisk();
+ nsresult GetContextFile(nsILoadContextInfo* aLoadContextInfo, bool aPinned,
+ const nsAString& aOrigin, nsIFile** _retval);
+
+ void CreateIterators();
+ void CloseIterators();
+ void StartEvicting();
+ void EvictEntries();
+
+ // Whether eviction is in progress
+ bool mEvicting{false};
+ // Whether index is up to date. We wait with eviction until the index finishes
+ // update process when it is outdated. NOTE: We also stop eviction in progress
+ // when the index is found outdated, the eviction is restarted again once the
+ // update process finishes.
+ bool mIndexIsUpToDate{false};
+ // Whether we already tried to restore unfinished jobs from previous run after
+ // startup.
+ static bool sDiskAlreadySearched;
+ // Array of contexts being evicted.
+ nsTArray<UniquePtr<CacheFileContextEvictorEntry>> mEntries;
+ nsCOMPtr<nsIFile> mCacheDirectory;
+ nsCOMPtr<nsIFile> mEntriesDir;
+};
+
+} // namespace net
+} // namespace mozilla
+
+#endif