mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
527 lines
14 KiB
C++
527 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
*
|
|
* 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 "nspr.h"
|
|
#include "nsCacheEntry.h"
|
|
#include "nsCacheEntryDescriptor.h"
|
|
#include "nsCacheMetaData.h"
|
|
#include "nsCacheRequest.h"
|
|
#include "nsThreadUtils.h"
|
|
#include "nsError.h"
|
|
#include "nsICacheService.h"
|
|
#include "nsCache.h"
|
|
#include "nsCacheService.h"
|
|
#include "nsCacheDevice.h"
|
|
#include "nsHashKeys.h"
|
|
|
|
using namespace mozilla;
|
|
|
|
nsCacheEntry::nsCacheEntry(nsCString * key,
|
|
bool streamBased,
|
|
nsCacheStoragePolicy storagePolicy)
|
|
: mKey(key),
|
|
mFetchCount(0),
|
|
mLastFetched(0),
|
|
mLastModified(0),
|
|
mExpirationTime(nsICache::NO_EXPIRATION_TIME),
|
|
mFlags(0),
|
|
mPredictedDataSize(-1),
|
|
mDataSize(0),
|
|
mCacheDevice(nullptr),
|
|
mCustomDevice(nullptr),
|
|
mData(nullptr)
|
|
{
|
|
MOZ_COUNT_CTOR(nsCacheEntry);
|
|
PR_INIT_CLIST(this);
|
|
PR_INIT_CLIST(&mRequestQ);
|
|
PR_INIT_CLIST(&mDescriptorQ);
|
|
|
|
if (streamBased) MarkStreamBased();
|
|
SetStoragePolicy(storagePolicy);
|
|
|
|
MarkPublic();
|
|
}
|
|
|
|
|
|
nsCacheEntry::~nsCacheEntry()
|
|
{
|
|
MOZ_COUNT_DTOR(nsCacheEntry);
|
|
delete mKey;
|
|
|
|
if (mData)
|
|
nsCacheService::ReleaseObject_Locked(mData, mThread);
|
|
}
|
|
|
|
|
|
nsresult
|
|
nsCacheEntry::Create( const char * key,
|
|
bool streamBased,
|
|
nsCacheStoragePolicy storagePolicy,
|
|
nsCacheDevice * device,
|
|
nsCacheEntry ** result)
|
|
{
|
|
nsCString* newKey = new nsCString(key);
|
|
if (!newKey) return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
nsCacheEntry* entry = new nsCacheEntry(newKey, streamBased, storagePolicy);
|
|
if (!entry) { delete newKey; return NS_ERROR_OUT_OF_MEMORY; }
|
|
|
|
entry->SetCacheDevice(device);
|
|
|
|
*result = entry;
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
void
|
|
nsCacheEntry::Fetched()
|
|
{
|
|
mLastFetched = SecondsFromPRTime(PR_Now());
|
|
++mFetchCount;
|
|
MarkEntryDirty();
|
|
}
|
|
|
|
|
|
const char *
|
|
nsCacheEntry::GetDeviceID()
|
|
{
|
|
if (mCacheDevice) return mCacheDevice->GetDeviceID();
|
|
return nullptr;
|
|
}
|
|
|
|
|
|
void
|
|
nsCacheEntry::TouchData()
|
|
{
|
|
mLastModified = SecondsFromPRTime(PR_Now());
|
|
MarkDataDirty();
|
|
}
|
|
|
|
|
|
void
|
|
nsCacheEntry::SetData(nsISupports * data)
|
|
{
|
|
if (mData) {
|
|
nsCacheService::ReleaseObject_Locked(mData, mThread);
|
|
mData = nullptr;
|
|
}
|
|
|
|
if (data) {
|
|
NS_ADDREF(mData = data);
|
|
mThread = do_GetCurrentThread();
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
nsCacheEntry::TouchMetaData()
|
|
{
|
|
mLastModified = SecondsFromPRTime(PR_Now());
|
|
MarkMetaDataDirty();
|
|
}
|
|
|
|
|
|
/**
|
|
* cache entry states
|
|
* 0 descriptors (new entry)
|
|
* 0 descriptors (existing, bound entry)
|
|
* n descriptors (existing, bound entry) valid
|
|
* n descriptors (existing, bound entry) not valid (wait until valid or doomed)
|
|
*/
|
|
|
|
nsresult
|
|
nsCacheEntry::RequestAccess(nsCacheRequest * request, nsCacheAccessMode *accessGranted)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
|
|
if (IsDoomed()) return NS_ERROR_CACHE_ENTRY_DOOMED;
|
|
|
|
if (!IsInitialized()) {
|
|
// brand new, unbound entry
|
|
request->mKey = nullptr; // steal ownership of the key string
|
|
if (request->IsStreamBased()) MarkStreamBased();
|
|
MarkInitialized();
|
|
|
|
*accessGranted = request->AccessRequested() & nsICache::ACCESS_WRITE;
|
|
NS_ASSERTION(*accessGranted, "new cache entry for READ-ONLY request");
|
|
PR_APPEND_LINK(request, &mRequestQ);
|
|
return rv;
|
|
}
|
|
|
|
if (IsStreamData() != request->IsStreamBased()) {
|
|
*accessGranted = nsICache::ACCESS_NONE;
|
|
return request->IsStreamBased() ?
|
|
NS_ERROR_CACHE_DATA_IS_NOT_STREAM : NS_ERROR_CACHE_DATA_IS_STREAM;
|
|
}
|
|
|
|
if (PR_CLIST_IS_EMPTY(&mDescriptorQ)) {
|
|
// 1st descriptor for existing bound entry
|
|
*accessGranted = request->AccessRequested();
|
|
if (*accessGranted & nsICache::ACCESS_WRITE) {
|
|
MarkInvalid();
|
|
} else {
|
|
MarkValid();
|
|
}
|
|
} else {
|
|
// nth request for existing, bound entry
|
|
*accessGranted = request->AccessRequested() & ~nsICache::ACCESS_WRITE;
|
|
if (!IsValid())
|
|
rv = NS_ERROR_CACHE_WAIT_FOR_VALIDATION;
|
|
}
|
|
PR_APPEND_LINK(request,&mRequestQ);
|
|
|
|
return rv;
|
|
}
|
|
|
|
|
|
nsresult
|
|
nsCacheEntry::CreateDescriptor(nsCacheRequest * request,
|
|
nsCacheAccessMode accessGranted,
|
|
nsICacheEntryDescriptor ** result)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(request && result);
|
|
|
|
nsCacheEntryDescriptor * descriptor =
|
|
new nsCacheEntryDescriptor(this, accessGranted);
|
|
|
|
// XXX check request is on q
|
|
PR_REMOVE_AND_INIT_LINK(request); // remove request regardless of success
|
|
|
|
if (descriptor == nullptr)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
PR_APPEND_LINK(descriptor, &mDescriptorQ);
|
|
|
|
CACHE_LOG_DEBUG((" descriptor %p created for request %p on entry %p\n",
|
|
descriptor, request, this));
|
|
|
|
NS_ADDREF(*result = descriptor);
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
bool
|
|
nsCacheEntry::RemoveRequest(nsCacheRequest * request)
|
|
{
|
|
// XXX if debug: verify this request belongs to this entry
|
|
PR_REMOVE_AND_INIT_LINK(request);
|
|
|
|
// return true if this entry should stay active
|
|
return !((PR_CLIST_IS_EMPTY(&mRequestQ)) &&
|
|
(PR_CLIST_IS_EMPTY(&mDescriptorQ)));
|
|
}
|
|
|
|
|
|
bool
|
|
nsCacheEntry::RemoveDescriptor(nsCacheEntryDescriptor * descriptor)
|
|
{
|
|
NS_ASSERTION(descriptor->CacheEntry() == this, "### Wrong cache entry!!");
|
|
nsresult rv = descriptor->CloseOutput();
|
|
if (rv == NS_BASE_STREAM_WOULD_BLOCK)
|
|
return true;
|
|
|
|
descriptor->ClearCacheEntry();
|
|
PR_REMOVE_AND_INIT_LINK(descriptor);
|
|
|
|
// Doom entry if something bad happens while closing. See bug #673543
|
|
if (NS_FAILED(rv))
|
|
nsCacheService::DoomEntry(this);
|
|
|
|
if (!PR_CLIST_IS_EMPTY(&mDescriptorQ))
|
|
return true; // stay active if we still have open descriptors
|
|
|
|
if (PR_CLIST_IS_EMPTY(&mRequestQ))
|
|
return false; // no descriptors or requests, we can deactivate
|
|
|
|
return true; // find next best request to give a descriptor to
|
|
}
|
|
|
|
|
|
void
|
|
nsCacheEntry::DetachDescriptors(void)
|
|
{
|
|
nsCacheEntryDescriptor * descriptor =
|
|
(nsCacheEntryDescriptor *)PR_LIST_HEAD(&mDescriptorQ);
|
|
|
|
while (descriptor != &mDescriptorQ) {
|
|
nsCacheEntryDescriptor * nextDescriptor =
|
|
(nsCacheEntryDescriptor *)PR_NEXT_LINK(descriptor);
|
|
|
|
// Doom entry if something bad happens while closing. See bug #673543
|
|
// Errors are handled different from RemoveDescriptor because this
|
|
// method is only called from ClearDoomList (in which case the entry is
|
|
// doomed anyway) and ClearActiveEntries (in which case we are shutting
|
|
// down and really want to get rid of the entry immediately)
|
|
if (NS_FAILED(descriptor->CloseOutput()))
|
|
nsCacheService::DoomEntry(this);
|
|
|
|
descriptor->ClearCacheEntry();
|
|
PR_REMOVE_AND_INIT_LINK(descriptor);
|
|
descriptor = nextDescriptor;
|
|
}
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* nsCacheEntryInfo - for implementing about:cache
|
|
*****************************************************************************/
|
|
|
|
NS_IMPL_ISUPPORTS1(nsCacheEntryInfo, nsICacheEntryInfo)
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsCacheEntryInfo::GetClientID(char ** clientID)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(clientID);
|
|
if (!mCacheEntry) return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
return ClientIDFromCacheKey(*mCacheEntry->Key(), clientID);
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsCacheEntryInfo::GetDeviceID(char ** deviceID)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(deviceID);
|
|
if (!mCacheEntry) return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
*deviceID = NS_strdup(mCacheEntry->GetDeviceID());
|
|
return *deviceID ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsCacheEntryInfo::GetKey(nsACString &key)
|
|
{
|
|
if (!mCacheEntry) return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
return ClientKeyFromCacheKey(*mCacheEntry->Key(), key);
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsCacheEntryInfo::GetFetchCount(PRInt32 * fetchCount)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(fetchCount);
|
|
if (!mCacheEntry) return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
*fetchCount = mCacheEntry->FetchCount();
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsCacheEntryInfo::GetLastFetched(PRUint32 * lastFetched)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(lastFetched);
|
|
if (!mCacheEntry) return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
*lastFetched = mCacheEntry->LastFetched();
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsCacheEntryInfo::GetLastModified(PRUint32 * lastModified)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(lastModified);
|
|
if (!mCacheEntry) return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
*lastModified = mCacheEntry->LastModified();
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsCacheEntryInfo::GetExpirationTime(PRUint32 * expirationTime)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(expirationTime);
|
|
if (!mCacheEntry) return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
*expirationTime = mCacheEntry->ExpirationTime();
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsCacheEntryInfo::GetDataSize(PRUint32 * dataSize)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(dataSize);
|
|
if (!mCacheEntry) return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
*dataSize = mCacheEntry->DataSize();
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsCacheEntryInfo::IsStreamBased(bool * result)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(result);
|
|
if (!mCacheEntry) return NS_ERROR_NOT_AVAILABLE;
|
|
|
|
*result = mCacheEntry->IsStreamData();
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
* nsCacheEntryHashTable
|
|
*****************************************************************************/
|
|
|
|
PLDHashTableOps
|
|
nsCacheEntryHashTable::ops =
|
|
{
|
|
PL_DHashAllocTable,
|
|
PL_DHashFreeTable,
|
|
HashKey,
|
|
MatchEntry,
|
|
MoveEntry,
|
|
ClearEntry,
|
|
PL_DHashFinalizeStub
|
|
};
|
|
|
|
|
|
nsCacheEntryHashTable::nsCacheEntryHashTable()
|
|
: initialized(false)
|
|
{
|
|
MOZ_COUNT_CTOR(nsCacheEntryHashTable);
|
|
}
|
|
|
|
|
|
nsCacheEntryHashTable::~nsCacheEntryHashTable()
|
|
{
|
|
MOZ_COUNT_DTOR(nsCacheEntryHashTable);
|
|
if (initialized)
|
|
Shutdown();
|
|
}
|
|
|
|
|
|
nsresult
|
|
nsCacheEntryHashTable::Init()
|
|
{
|
|
nsresult rv = NS_OK;
|
|
initialized = PL_DHashTableInit(&table, &ops, nullptr,
|
|
sizeof(nsCacheEntryHashTableEntry), 512);
|
|
|
|
if (!initialized) rv = NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsCacheEntryHashTable::Shutdown()
|
|
{
|
|
if (initialized) {
|
|
PL_DHashTableFinish(&table);
|
|
initialized = false;
|
|
}
|
|
}
|
|
|
|
|
|
nsCacheEntry *
|
|
nsCacheEntryHashTable::GetEntry( const nsCString * key)
|
|
{
|
|
PLDHashEntryHdr *hashEntry;
|
|
nsCacheEntry *result = nullptr;
|
|
|
|
NS_ASSERTION(initialized, "nsCacheEntryHashTable not initialized");
|
|
if (!initialized) return nullptr;
|
|
|
|
hashEntry = PL_DHashTableOperate(&table, key, PL_DHASH_LOOKUP);
|
|
if (PL_DHASH_ENTRY_IS_BUSY(hashEntry)) {
|
|
result = ((nsCacheEntryHashTableEntry *)hashEntry)->cacheEntry;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
nsresult
|
|
nsCacheEntryHashTable::AddEntry( nsCacheEntry *cacheEntry)
|
|
{
|
|
PLDHashEntryHdr *hashEntry;
|
|
|
|
NS_ASSERTION(initialized, "nsCacheEntryHashTable not initialized");
|
|
if (!initialized) return NS_ERROR_NOT_INITIALIZED;
|
|
if (!cacheEntry) return NS_ERROR_NULL_POINTER;
|
|
|
|
hashEntry = PL_DHashTableOperate(&table, cacheEntry->mKey, PL_DHASH_ADD);
|
|
#ifndef DEBUG_dougt
|
|
NS_ASSERTION(((nsCacheEntryHashTableEntry *)hashEntry)->cacheEntry == 0,
|
|
"### nsCacheEntryHashTable::AddEntry - entry already used");
|
|
#endif
|
|
((nsCacheEntryHashTableEntry *)hashEntry)->cacheEntry = cacheEntry;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
void
|
|
nsCacheEntryHashTable::RemoveEntry( nsCacheEntry *cacheEntry)
|
|
{
|
|
NS_ASSERTION(initialized, "nsCacheEntryHashTable not initialized");
|
|
NS_ASSERTION(cacheEntry, "### cacheEntry == nullptr");
|
|
|
|
if (!initialized) return; // NS_ERROR_NOT_INITIALIZED
|
|
|
|
#if DEBUG
|
|
// XXX debug code to make sure we have the entry we're trying to remove
|
|
nsCacheEntry *check = GetEntry(cacheEntry->mKey);
|
|
NS_ASSERTION(check == cacheEntry, "### Attempting to remove unknown cache entry!!!");
|
|
#endif
|
|
(void) PL_DHashTableOperate(&table, cacheEntry->mKey, PL_DHASH_REMOVE);
|
|
}
|
|
|
|
|
|
void
|
|
nsCacheEntryHashTable::VisitEntries( PLDHashEnumerator etor, void *arg)
|
|
{
|
|
NS_ASSERTION(initialized, "nsCacheEntryHashTable not initialized");
|
|
if (!initialized) return; // NS_ERROR_NOT_INITIALIZED
|
|
PL_DHashTableEnumerate(&table, etor, arg);
|
|
}
|
|
|
|
|
|
/**
|
|
* hash table operation callback functions
|
|
*/
|
|
|
|
PLDHashNumber
|
|
nsCacheEntryHashTable::HashKey( PLDHashTable *table, const void *key)
|
|
{
|
|
return HashString(*static_cast<const nsCString *>(key));
|
|
}
|
|
|
|
bool
|
|
nsCacheEntryHashTable::MatchEntry(PLDHashTable * /* table */,
|
|
const PLDHashEntryHdr * hashEntry,
|
|
const void * key)
|
|
{
|
|
NS_ASSERTION(key != nullptr, "### nsCacheEntryHashTable::MatchEntry : null key");
|
|
nsCacheEntry *cacheEntry = ((nsCacheEntryHashTableEntry *)hashEntry)->cacheEntry;
|
|
|
|
return cacheEntry->mKey->Equals(*(nsCString *)key);
|
|
}
|
|
|
|
|
|
void
|
|
nsCacheEntryHashTable::MoveEntry(PLDHashTable * /* table */,
|
|
const PLDHashEntryHdr *from,
|
|
PLDHashEntryHdr *to)
|
|
{
|
|
((nsCacheEntryHashTableEntry *)to)->cacheEntry =
|
|
((nsCacheEntryHashTableEntry *)from)->cacheEntry;
|
|
}
|
|
|
|
|
|
void
|
|
nsCacheEntryHashTable::ClearEntry(PLDHashTable * /* table */,
|
|
PLDHashEntryHdr * hashEntry)
|
|
{
|
|
((nsCacheEntryHashTableEntry *)hashEntry)->cacheEntry = 0;
|
|
}
|