michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "CacheLog.h"
michael@0: #include "CacheFileContextEvictor.h"
michael@0: #include "CacheFileIOManager.h"
michael@0: #include "CacheIndex.h"
michael@0: #include "CacheIndexIterator.h"
michael@0: #include "CacheFileUtils.h"
michael@0: #include "nsIFile.h"
michael@0: #include "LoadContextInfo.h"
michael@0: #include "nsThreadUtils.h"
michael@0: #include "nsString.h"
michael@0: #include "nsISimpleEnumerator.h"
michael@0: #include "nsIDirectoryEnumerator.h"
michael@0: #include "mozilla/Base64.h"
michael@0: 
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace net {
michael@0: 
michael@0: const char kContextEvictionPrefix[] = "ce_";
michael@0: const uint32_t kContextEvictionPrefixLength =
michael@0:   sizeof(kContextEvictionPrefix) - 1;
michael@0: 
michael@0: bool CacheFileContextEvictor::sDiskAlreadySearched = false;
michael@0: 
michael@0: CacheFileContextEvictor::CacheFileContextEvictor()
michael@0:   : mEvicting(false)
michael@0:   , mIndexIsUpToDate(false)
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::CacheFileContextEvictor() [this=%p]", this));
michael@0: }
michael@0: 
michael@0: CacheFileContextEvictor::~CacheFileContextEvictor()
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::~CacheFileContextEvictor() [this=%p]", this));
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: CacheFileContextEvictor::Init(nsIFile *aCacheDirectory)
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::Init()"));
michael@0: 
michael@0:   nsresult rv;
michael@0: 
michael@0:   MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
michael@0: 
michael@0:   CacheIndex::IsUpToDate(&mIndexIsUpToDate);
michael@0: 
michael@0:   mCacheDirectory = aCacheDirectory;
michael@0: 
michael@0:   rv = aCacheDirectory->Clone(getter_AddRefs(mEntriesDir));
michael@0:   if (NS_WARN_IF(NS_FAILED(rv))) {
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0:   rv = mEntriesDir->AppendNative(NS_LITERAL_CSTRING(kEntriesDir));
michael@0:   if (NS_WARN_IF(NS_FAILED(rv))) {
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0:   if (!sDiskAlreadySearched) {
michael@0:     LoadEvictInfoFromDisk();
michael@0:     if ((mEntries.Length() != 0) && mIndexIsUpToDate) {
michael@0:       CreateIterators();
michael@0:       StartEvicting();
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: uint32_t
michael@0: CacheFileContextEvictor::ContextsCount()
michael@0: {
michael@0:   MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
michael@0: 
michael@0:   return mEntries.Length();
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: CacheFileContextEvictor::AddContext(nsILoadContextInfo *aLoadContextInfo)
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::AddContext() [this=%p, loadContextInfo=%p]",
michael@0:        this, aLoadContextInfo));
michael@0: 
michael@0:   nsresult rv;
michael@0: 
michael@0:   MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
michael@0: 
michael@0:   CacheFileContextEvictorEntry *entry = nullptr;
michael@0:   for (uint32_t i = 0; i < mEntries.Length(); ++i) {
michael@0:     if (mEntries[i]->mInfo->Equals(aLoadContextInfo)) {
michael@0:       entry = mEntries[i];
michael@0:       break;
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   if (!entry) {
michael@0:     entry = new CacheFileContextEvictorEntry();
michael@0:     entry->mInfo = aLoadContextInfo;
michael@0:     mEntries.AppendElement(entry);
michael@0:   }
michael@0: 
michael@0:   entry->mTimeStamp = PR_Now() / PR_USEC_PER_MSEC;
michael@0: 
michael@0:   PersistEvictionInfoToDisk(aLoadContextInfo);
michael@0: 
michael@0:   if (mIndexIsUpToDate) {
michael@0:     // Already existing context could be added again, in this case the iterator
michael@0:     // would be recreated. Close the old iterator explicitely.
michael@0:     if (entry->mIterator) {
michael@0:       entry->mIterator->Close();
michael@0:       entry->mIterator = nullptr;
michael@0:     }
michael@0: 
michael@0:     rv = CacheIndex::GetIterator(aLoadContextInfo, false,
michael@0:                                  getter_AddRefs(entry->mIterator));
michael@0:     if (NS_FAILED(rv)) {
michael@0:       // This could probably happen during shutdown. Remove the entry from
michael@0:       // the array, but leave the info on the disk. No entry can be opened
michael@0:       // during shutdown and we'll load the eviction info on next start.
michael@0:       LOG(("CacheFileContextEvictor::AddContext() - Cannot get an iterator. "
michael@0:            "[rv=0x%08x]", rv));
michael@0:       mEntries.RemoveElement(entry);
michael@0:       return rv;
michael@0:     }
michael@0: 
michael@0:     StartEvicting();
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: CacheFileContextEvictor::CacheIndexStateChanged()
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::CacheIndexStateChanged() [this=%p]", this));
michael@0: 
michael@0:   MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
michael@0: 
michael@0:   bool isUpToDate = false;
michael@0:   CacheIndex::IsUpToDate(&isUpToDate);
michael@0:   if (mEntries.Length() == 0) {
michael@0:     // Just save the state and exit, since there is nothing to do
michael@0:     mIndexIsUpToDate = isUpToDate;
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   if (!isUpToDate && !mIndexIsUpToDate) {
michael@0:     // Index is outdated and status has not changed, nothing to do.
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   if (isUpToDate && mIndexIsUpToDate) {
michael@0:     // Status has not changed, but make sure the eviction is running.
michael@0:     if (mEvicting) {
michael@0:       return NS_OK;
michael@0:     }
michael@0: 
michael@0:     // We're not evicting, but we should be evicting?!
michael@0:     LOG(("CacheFileContextEvictor::CacheIndexStateChanged() - Index is up to "
michael@0:          "date, we have some context to evict but eviction is not running! "
michael@0:          "Starting now."));
michael@0:   }
michael@0: 
michael@0:   mIndexIsUpToDate = isUpToDate;
michael@0: 
michael@0:   if (mIndexIsUpToDate) {
michael@0:     CreateIterators();
michael@0:     StartEvicting();
michael@0:   } else {
michael@0:     CloseIterators();
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: CacheFileContextEvictor::WasEvicted(const nsACString &aKey, nsIFile *aFile,
michael@0:                                     bool *_retval)
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::WasEvicted() [key=%s]",
michael@0:        PromiseFlatCString(aKey).get()));
michael@0: 
michael@0:   nsresult rv;
michael@0: 
michael@0:   MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
michael@0: 
michael@0:   nsCOMPtr<nsILoadContextInfo> info = CacheFileUtils::ParseKey(aKey);
michael@0:   MOZ_ASSERT(info);
michael@0:   if (!info) {
michael@0:     LOG(("CacheFileContextEvictor::WasEvicted() - Cannot parse key!"));
michael@0:     *_retval = false;
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   CacheFileContextEvictorEntry *entry = nullptr;
michael@0:   for (uint32_t i = 0; i < mEntries.Length(); ++i) {
michael@0:     if (info->Equals(mEntries[i]->mInfo)) {
michael@0:       entry = mEntries[i];
michael@0:       break;
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   if (!entry) {
michael@0:     LOG(("CacheFileContextEvictor::WasEvicted() - Didn't find equal context, "
michael@0:          "returning false."));
michael@0:     *_retval = false;
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   PRTime lastModifiedTime;
michael@0:   rv = aFile->GetLastModifiedTime(&lastModifiedTime);
michael@0:   if (NS_FAILED(rv)) {
michael@0:     LOG(("CacheFileContextEvictor::WasEvicted() - Cannot get last modified time"
michael@0:          ", returning false."));
michael@0:     *_retval = false;
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   *_retval = !(lastModifiedTime > entry->mTimeStamp);
michael@0:   LOG(("CacheFileContextEvictor::WasEvicted() - returning %s. [mTimeStamp=%lld,"
michael@0:        " lastModifiedTime=%lld]", *_retval ? "true" : "false",
michael@0:        mEntries[0]->mTimeStamp, lastModifiedTime));
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: CacheFileContextEvictor::PersistEvictionInfoToDisk(
michael@0:   nsILoadContextInfo *aLoadContextInfo)
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::PersistEvictionInfoToDisk() [this=%p, "
michael@0:        "loadContextInfo=%p]", this, aLoadContextInfo));
michael@0: 
michael@0:   nsresult rv;
michael@0: 
michael@0:   MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
michael@0: 
michael@0:   nsCOMPtr<nsIFile> file;
michael@0:   rv = GetContextFile(aLoadContextInfo, getter_AddRefs(file));
michael@0:   if (NS_WARN_IF(NS_FAILED(rv))) {
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0: #ifdef PR_LOGGING
michael@0:   nsAutoCString path;
michael@0:   file->GetNativePath(path);
michael@0: #endif
michael@0: 
michael@0:   PRFileDesc *fd;
michael@0:   rv = file->OpenNSPRFileDesc(PR_RDWR | PR_CREATE_FILE | PR_TRUNCATE, 0600,
michael@0:                               &fd);
michael@0:   if (NS_WARN_IF(NS_FAILED(rv))) {
michael@0:     LOG(("CacheFileContextEvictor::PersistEvictionInfoToDisk() - Creating file "
michael@0:          "failed! [path=%s, rv=0x%08x]", path.get(), rv));
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0:   PR_Close(fd);
michael@0: 
michael@0:   LOG(("CacheFileContextEvictor::PersistEvictionInfoToDisk() - Successfully "
michael@0:        "created file. [path=%s]", path.get()));
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: CacheFileContextEvictor::RemoveEvictInfoFromDisk(
michael@0:   nsILoadContextInfo *aLoadContextInfo)
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::RemoveEvictInfoFromDisk() [this=%p, "
michael@0:        "loadContextInfo=%p]", this, aLoadContextInfo));
michael@0: 
michael@0:   nsresult rv;
michael@0: 
michael@0:   MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
michael@0: 
michael@0:   nsCOMPtr<nsIFile> file;
michael@0:   rv = GetContextFile(aLoadContextInfo, getter_AddRefs(file));
michael@0:   if (NS_WARN_IF(NS_FAILED(rv))) {
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0: #ifdef PR_LOGGING
michael@0:   nsAutoCString path;
michael@0:   file->GetNativePath(path);
michael@0: #endif
michael@0: 
michael@0:   rv = file->Remove(false);
michael@0:   if (NS_WARN_IF(NS_FAILED(rv))) {
michael@0:     LOG(("CacheFileContextEvictor::RemoveEvictionInfoFromDisk() - Removing file"
michael@0:          " failed! [path=%s, rv=0x%08x]", path.get(), rv));
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0:   LOG(("CacheFileContextEvictor::RemoveEvictionInfoFromDisk() - Successfully "
michael@0:        "removed file. [path=%s]", path.get()));
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: CacheFileContextEvictor::LoadEvictInfoFromDisk()
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::LoadEvictInfoFromDisk() [this=%p]", this));
michael@0: 
michael@0:   nsresult rv;
michael@0: 
michael@0:   MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
michael@0: 
michael@0:   sDiskAlreadySearched = true;
michael@0: 
michael@0:   nsCOMPtr<nsISimpleEnumerator> enumerator;
michael@0:   rv = mCacheDirectory->GetDirectoryEntries(getter_AddRefs(enumerator));
michael@0:   if (NS_WARN_IF(NS_FAILED(rv))) {
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIDirectoryEnumerator> dirEnum = do_QueryInterface(enumerator, &rv);
michael@0:   if (NS_WARN_IF(NS_FAILED(rv))) {
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0:   while (true) {
michael@0:     nsCOMPtr<nsIFile> file;
michael@0:     rv = dirEnum->GetNextFile(getter_AddRefs(file));
michael@0:     if (!file) {
michael@0:       break;
michael@0:     }
michael@0: 
michael@0:     bool isDir = false;
michael@0:     file->IsDirectory(&isDir);
michael@0:     if (isDir) {
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     nsAutoCString leaf;
michael@0:     rv = file->GetNativeLeafName(leaf);
michael@0:     if (NS_FAILED(rv)) {
michael@0:       LOG(("CacheFileContextEvictor::LoadEvictInfoFromDisk() - "
michael@0:            "GetNativeLeafName() failed! Skipping file."));
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     if (leaf.Length() < kContextEvictionPrefixLength) {
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     if (!StringBeginsWith(leaf, NS_LITERAL_CSTRING(kContextEvictionPrefix))) {
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     nsAutoCString encoded;
michael@0:     encoded = Substring(leaf, kContextEvictionPrefixLength);
michael@0:     encoded.ReplaceChar('-', '/');
michael@0: 
michael@0:     nsAutoCString decoded;
michael@0:     rv = Base64Decode(encoded, decoded);
michael@0:     if (NS_FAILED(rv)) {
michael@0:       LOG(("CacheFileContextEvictor::LoadEvictInfoFromDisk() - Base64 decoding "
michael@0:            "failed. Removing the file. [file=%s]", leaf.get()));
michael@0:       file->Remove(false);
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     nsCOMPtr<nsILoadContextInfo> info = CacheFileUtils::ParseKey(decoded);
michael@0: 
michael@0:     if (!info) {
michael@0:       LOG(("CacheFileContextEvictor::LoadEvictInfoFromDisk() - Cannot parse "
michael@0:            "context key, removing file. [contextKey=%s, file=%s]",
michael@0:            decoded.get(), leaf.get()));
michael@0:       file->Remove(false);
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     PRTime lastModifiedTime;
michael@0:     rv = file->GetLastModifiedTime(&lastModifiedTime);
michael@0:     if (NS_FAILED(rv)) {
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     CacheFileContextEvictorEntry *entry = new CacheFileContextEvictorEntry();
michael@0:     entry->mInfo = info;
michael@0:     entry->mTimeStamp = lastModifiedTime;
michael@0:     mEntries.AppendElement(entry);
michael@0:   }
michael@0: 
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: CacheFileContextEvictor::GetContextFile(nsILoadContextInfo *aLoadContextInfo,
michael@0:                                         nsIFile **_retval)
michael@0: {
michael@0:   nsresult rv;
michael@0: 
michael@0:   nsAutoCString leafName;
michael@0:   leafName.Assign(NS_LITERAL_CSTRING(kContextEvictionPrefix));
michael@0: 
michael@0:   nsAutoCString keyPrefix;
michael@0:   CacheFileUtils::AppendKeyPrefix(aLoadContextInfo, keyPrefix);
michael@0: 
michael@0:   // TODO: This hack is needed because current CacheFileUtils::ParseKey() can
michael@0:   // parse only the whole key and not just the key prefix generated by
michael@0:   // CacheFileUtils::CreateKeyPrefix(). This should be removed once bug #968593
michael@0:   // is fixed.
michael@0:   keyPrefix.Append(":foo");
michael@0: 
michael@0:   nsAutoCString data64;
michael@0:   rv = Base64Encode(keyPrefix, data64);
michael@0:   if (NS_WARN_IF(NS_FAILED(rv))) {
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0:   // Replace '/' with '-' since '/' cannot be part of the filename.
michael@0:   data64.ReplaceChar('/', '-');
michael@0: 
michael@0:   leafName.Append(data64);
michael@0: 
michael@0:   nsCOMPtr<nsIFile> file;
michael@0:   rv = mCacheDirectory->Clone(getter_AddRefs(file));
michael@0:   if (NS_WARN_IF(NS_FAILED(rv))) {
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0:   rv = file->AppendNative(leafName);
michael@0:   if (NS_WARN_IF(NS_FAILED(rv))) {
michael@0:     return rv;
michael@0:   }
michael@0: 
michael@0:   file.swap(*_retval);
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: void
michael@0: CacheFileContextEvictor::CreateIterators()
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::CreateIterators() [this=%p]", this));
michael@0: 
michael@0:   CloseIterators();
michael@0: 
michael@0:   nsresult rv;
michael@0: 
michael@0:   for (uint32_t i = 0; i < mEntries.Length(); ) {
michael@0:     rv = CacheIndex::GetIterator(mEntries[i]->mInfo, false,
michael@0:                                  getter_AddRefs(mEntries[i]->mIterator));
michael@0:     if (NS_FAILED(rv)) {
michael@0:       LOG(("CacheFileContextEvictor::CreateIterators() - Cannot get an iterator"
michael@0:            ". [rv=0x%08x]", rv));
michael@0:       mEntries.RemoveElementAt(i);
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     ++i;
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: CacheFileContextEvictor::CloseIterators()
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::CloseIterators() [this=%p]", this));
michael@0: 
michael@0:   for (uint32_t i = 0; i < mEntries.Length(); ++i) {
michael@0:     if (mEntries[i]->mIterator) {
michael@0:       mEntries[i]->mIterator->Close();
michael@0:       mEntries[i]->mIterator = nullptr;
michael@0:     }
michael@0:   }
michael@0: }
michael@0: 
michael@0: void
michael@0: CacheFileContextEvictor::StartEvicting()
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::StartEvicting() [this=%p]", this));
michael@0: 
michael@0:   MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
michael@0: 
michael@0:   if (mEvicting) {
michael@0:     LOG(("CacheFileContextEvictor::StartEvicting() - already evicintg."));
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   if (mEntries.Length() == 0) {
michael@0:     LOG(("CacheFileContextEvictor::StartEvicting() - no context to evict."));
michael@0:     return;
michael@0:   }
michael@0: 
michael@0:   nsCOMPtr<nsIRunnable> ev;
michael@0:   ev = NS_NewRunnableMethod(this, &CacheFileContextEvictor::EvictEntries);
michael@0: 
michael@0:   nsRefPtr<CacheIOThread> ioThread = CacheFileIOManager::IOThread();
michael@0: 
michael@0:   nsresult rv = ioThread->Dispatch(ev, CacheIOThread::EVICT);
michael@0:   if (NS_FAILED(rv)) {
michael@0:     LOG(("CacheFileContextEvictor::StartEvicting() - Cannot dispatch event to "
michael@0:          "IO thread. [rv=0x%08x]", rv));
michael@0:   }
michael@0: 
michael@0:   mEvicting = true;
michael@0: }
michael@0: 
michael@0: nsresult
michael@0: CacheFileContextEvictor::EvictEntries()
michael@0: {
michael@0:   LOG(("CacheFileContextEvictor::EvictEntries()"));
michael@0: 
michael@0:   nsresult rv;
michael@0: 
michael@0:   MOZ_ASSERT(CacheFileIOManager::IsOnIOThread());
michael@0: 
michael@0:   mEvicting = false;
michael@0: 
michael@0:   if (!mIndexIsUpToDate) {
michael@0:     LOG(("CacheFileContextEvictor::EvictEntries() - Stopping evicting due to "
michael@0:          "outdated index."));
michael@0:     return NS_OK;
michael@0:   }
michael@0: 
michael@0:   while (true) {
michael@0:     if (CacheIOThread::YieldAndRerun()) {
michael@0:       LOG(("CacheFileContextEvictor::EvictEntries() - Breaking loop for higher "
michael@0:            "level events."));
michael@0:       mEvicting = true;
michael@0:       return NS_OK;
michael@0:     }
michael@0: 
michael@0:     if (mEntries.Length() == 0) {
michael@0:       LOG(("CacheFileContextEvictor::EvictEntries() - Stopping evicting, there "
michael@0:            "is no context to evict."));
michael@0:       return NS_OK;
michael@0:     }
michael@0: 
michael@0:     SHA1Sum::Hash hash;
michael@0:     rv = mEntries[0]->mIterator->GetNextHash(&hash);
michael@0:     if (rv == NS_ERROR_NOT_AVAILABLE) {
michael@0:       LOG(("CacheFileContextEvictor::EvictEntries() - No more entries left in "
michael@0:            "iterator. [iterator=%p, info=%p]", mEntries[0]->mIterator.get(),
michael@0:            mEntries[0]->mInfo.get()));
michael@0:       RemoveEvictInfoFromDisk(mEntries[0]->mInfo);
michael@0:       mEntries.RemoveElementAt(0);
michael@0:       continue;
michael@0:     } else if (NS_FAILED(rv)) {
michael@0:       LOG(("CacheFileContextEvictor::EvictEntries() - Iterator failed to "
michael@0:            "provide next hash (shutdown?), keeping eviction info on disk."
michael@0:            " [iterator=%p, info=%p]", mEntries[0]->mIterator.get(),
michael@0:            mEntries[0]->mInfo.get()));
michael@0:       mEntries.RemoveElementAt(0);
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     LOG(("CacheFileContextEvictor::EvictEntries() - Processing hash. "
michael@0:          "[hash=%08x%08x%08x%08x%08x, iterator=%p, info=%p]", LOGSHA1(&hash),
michael@0:          mEntries[0]->mIterator.get(), mEntries[0]->mInfo.get()));
michael@0: 
michael@0:     nsRefPtr<CacheFileHandle> handle;
michael@0:     CacheFileIOManager::gInstance->mHandles.GetHandle(&hash, false,
michael@0:                                                       getter_AddRefs(handle));
michael@0:     if (handle) {
michael@0:       // We doom any active handle in CacheFileIOManager::EvictByContext(), so
michael@0:       // this must be a new one. Skip it.
michael@0:       LOG(("CacheFileContextEvictor::EvictEntries() - Skipping entry since we "
michael@0:            "found an active handle. [handle=%p]", handle.get()));
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     nsAutoCString leafName;
michael@0:     CacheFileIOManager::HashToStr(&hash, leafName);
michael@0: 
michael@0:     PRTime lastModifiedTime;
michael@0:     nsCOMPtr<nsIFile> file;
michael@0:     rv = mEntriesDir->Clone(getter_AddRefs(file));
michael@0:     if (NS_SUCCEEDED(rv)) {
michael@0:       rv = file->AppendNative(leafName);
michael@0:     }
michael@0:     if (NS_SUCCEEDED(rv)) {
michael@0:       rv = file->GetLastModifiedTime(&lastModifiedTime);
michael@0:     }
michael@0:     if (NS_FAILED(rv)) {
michael@0:       LOG(("CacheFileContextEvictor::EvictEntries() - Cannot get last modified "
michael@0:            "time, skipping entry."));
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     if (lastModifiedTime > mEntries[0]->mTimeStamp) {
michael@0:       LOG(("CacheFileContextEvictor::EvictEntries() - Skipping newer entry. "
michael@0:            "[mTimeStamp=%lld, lastModifiedTime=%lld]", mEntries[0]->mTimeStamp,
michael@0:            lastModifiedTime));
michael@0:       continue;
michael@0:     }
michael@0: 
michael@0:     LOG(("CacheFileContextEvictor::EvictEntries - Removing entry."));
michael@0:     file->Remove(false);
michael@0:     CacheIndex::RemoveEntry(&hash);
michael@0:   }
michael@0: 
michael@0:   NS_NOTREACHED("We should never get here");
michael@0:   return NS_OK;
michael@0: }
michael@0: 
michael@0: } // net
michael@0: } // mozilla