gecko/xpcom/ds/nsObserverService.cpp
Ehsan Akhgari ebd358dfd7 Bug 927728 - Part 1: Replace PRUnichar with char16_t; r=roc
This patch was automatically generated by the following script:

#!/bin/bash
# Command to convert PRUnichar to char16_t

function convert() {
echo "Converting $1 to $2..."
find . ! -wholename "*nsprpub*" \
       ! -wholename "*security/nss*" \
       ! -wholename "*modules/libmar*" \
       ! -wholename "*/.hg*" \
       ! -wholename "obj-ff-dbg*" \
       ! -name prtypes.h \
       ! -name Char16.h \
         -type f \
      \( -iname "*.cpp" \
         -o -iname "*.h" \
         -o -iname "*.c" \
         -o -iname "*.cc" \
         -o -iname "*.idl" \
         -o -iname "*.ipdl" \
         -o -iname "*.ipdlh" \
         -o -iname "*.mm" \) | \
    xargs -n 1 sed -i -e "s/\b$1\b/$2/g"
}

convert PRUnichar char16_t
2014-01-04 10:02:17 -05:00

332 lines
10 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 "prlog.h"
#include "nsAutoPtr.h"
#include "nsIObserverService.h"
#include "nsIObserver.h"
#include "nsObserverService.h"
#include "nsObserverList.h"
#include "nsThreadUtils.h"
#include "nsEnumeratorUtils.h"
#include "mozilla/net/NeckoCommon.h"
#include "mozilla/Services.h"
#define NOTIFY_GLOBAL_OBSERVERS
#if defined(PR_LOGGING)
// Log module for nsObserverService logging...
//
// To enable logging (see prlog.h for full details):
//
// set NSPR_LOG_MODULES=ObserverService:5
// set NSPR_LOG_FILE=nspr.log
//
// this enables PR_LOG_DEBUG level information and places all output in
// the file nspr.log
static PRLogModuleInfo*
GetObserverServiceLog()
{
static PRLogModuleInfo *sLog;
if (!sLog)
sLog = PR_NewLogModule("ObserverService");
return sLog;
}
#define LOG(x) PR_LOG(GetObserverServiceLog(), PR_LOG_DEBUG, x)
#else
#define LOG(x)
#endif /* PR_LOGGING */
namespace mozilla {
struct SuspectObserver {
SuspectObserver(const char* aTopic, size_t aReferentCount)
: topic(aTopic), referentCount(aReferentCount) {}
const char* topic;
size_t referentCount;
};
struct ObserverServiceReferentCount {
ObserverServiceReferentCount()
: numStrong(0), numWeakAlive(0), numWeakDead(0) {}
size_t numStrong;
size_t numWeakAlive;
size_t numWeakDead;
nsTArray<SuspectObserver> suspectObservers;
};
} // namespace mozilla
using namespace mozilla;
PLDHashOperator
nsObserverService::CountReferents(nsObserverList* aObserverList,
void* aClosure)
{
if (!aObserverList) {
return PL_DHASH_NEXT;
}
ObserverServiceReferentCount* referentCount =
static_cast<ObserverServiceReferentCount*>(aClosure);
size_t numStrong = 0;
size_t numWeakAlive = 0;
size_t numWeakDead = 0;
nsTArray<ObserverRef>& observers = aObserverList->mObservers;
for (uint32_t i = 0; i < observers.Length(); i++) {
if (observers[i].isWeakRef) {
nsCOMPtr<nsIObserver> observerRef(
do_QueryReferent(observers[i].asWeak()));
if (observerRef) {
numWeakAlive++;
} else {
numWeakDead++;
}
} else {
numStrong++;
}
}
referentCount->numStrong += numStrong;
referentCount->numWeakAlive += numWeakAlive;
referentCount->numWeakDead += numWeakDead;
// Keep track of topics that have a suspiciously large number
// of referents (symptom of leaks).
size_t total = numStrong + numWeakAlive + numWeakDead;
if (total > kSuspectReferentCount) {
SuspectObserver suspect(aObserverList->GetKey(), total);
referentCount->suspectObservers.AppendElement(suspect);
}
return PL_DHASH_NEXT;
}
NS_IMETHODIMP
nsObserverService::CollectReports(nsIHandleReportCallback* aHandleReport,
nsISupports* aData)
{
ObserverServiceReferentCount referentCount;
mObserverTopicTable.EnumerateEntries(CountReferents, &referentCount);
nsresult rv;
for (uint32_t i = 0; i < referentCount.suspectObservers.Length(); i++) {
SuspectObserver& suspect = referentCount.suspectObservers[i];
nsPrintfCString suspectPath("observer-service-suspect/"
"referent(topic=%s)",
suspect.topic);
rv = aHandleReport->Callback(/* process */ EmptyCString(),
suspectPath, KIND_OTHER, UNITS_COUNT, suspect.referentCount,
NS_LITERAL_CSTRING("A topic with a suspiciously large number of "
"referents. This may be symptomatic of a leak "
"if the number of referents is high with "
"respect to the number of windows."),
aData);
if (NS_WARN_IF(NS_FAILED(rv)))
return rv;
}
rv = aHandleReport->Callback(/* process */ EmptyCString(),
NS_LITERAL_CSTRING("observer-service/referent/strong"),
KIND_OTHER, UNITS_COUNT, referentCount.numStrong,
NS_LITERAL_CSTRING("The number of strong references held by the "
"observer service."),
aData);
if (NS_WARN_IF(NS_FAILED(rv)))
return rv;
rv = aHandleReport->Callback(/* process */ EmptyCString(),
NS_LITERAL_CSTRING("observer-service/referent/weak/alive"),
KIND_OTHER, UNITS_COUNT, referentCount.numWeakAlive,
NS_LITERAL_CSTRING("The number of weak references held by the "
"observer service that are still alive."),
aData);
if (NS_WARN_IF(NS_FAILED(rv)))
return rv;
rv = aHandleReport->Callback(/* process */ EmptyCString(),
NS_LITERAL_CSTRING("observer-service/referent/weak/dead"),
KIND_OTHER, UNITS_COUNT, referentCount.numWeakDead,
NS_LITERAL_CSTRING("The number of weak references held by the "
"observer service that are dead."),
aData);
if (NS_WARN_IF(NS_FAILED(rv)))
return rv;
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
// nsObserverService Implementation
NS_IMPL_ISUPPORTS3(
nsObserverService,
nsIObserverService,
nsObserverService,
nsIMemoryReporter)
nsObserverService::nsObserverService() :
mShuttingDown(false)
{
}
nsObserverService::~nsObserverService(void)
{
Shutdown();
}
void
nsObserverService::RegisterReporter()
{
RegisterWeakMemoryReporter(this);
}
void
nsObserverService::Shutdown()
{
UnregisterWeakMemoryReporter(this);
mShuttingDown = true;
mObserverTopicTable.Clear();
}
nsresult
nsObserverService::Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr)
{
LOG(("nsObserverService::Create()"));
nsRefPtr<nsObserverService> os = new nsObserverService();
if (!os)
return NS_ERROR_OUT_OF_MEMORY;
// The memory reporter can not be immediately registered here because
// the nsMemoryReporterManager may attempt to get the nsObserverService
// during initialization, causing a recursive GetService.
nsRefPtr<nsRunnableMethod<nsObserverService> > registerRunnable =
NS_NewRunnableMethod(os, &nsObserverService::RegisterReporter);
NS_DispatchToCurrentThread(registerRunnable);
return os->QueryInterface(aIID, aInstancePtr);
}
#define NS_ENSURE_VALIDCALL \
if (!NS_IsMainThread()) { \
NS_ERROR("Using observer service off the main thread!"); \
return NS_ERROR_UNEXPECTED; \
} \
if (mShuttingDown) { \
NS_ERROR("Using observer service after XPCOM shutdown!"); \
return NS_ERROR_ILLEGAL_DURING_SHUTDOWN; \
}
NS_IMETHODIMP
nsObserverService::AddObserver(nsIObserver* anObserver, const char* aTopic,
bool ownsWeak)
{
LOG(("nsObserverService::AddObserver(%p: %s)",
(void*) anObserver, aTopic));
NS_ENSURE_VALIDCALL
if (NS_WARN_IF(!anObserver) || NS_WARN_IF(!aTopic))
return NS_ERROR_INVALID_ARG;
if (mozilla::net::IsNeckoChild() && !strncmp(aTopic, "http-on-", 8)) {
return NS_ERROR_NOT_IMPLEMENTED;
}
nsObserverList *observerList = mObserverTopicTable.PutEntry(aTopic);
if (!observerList)
return NS_ERROR_OUT_OF_MEMORY;
return observerList->AddObserver(anObserver, ownsWeak);
}
NS_IMETHODIMP
nsObserverService::RemoveObserver(nsIObserver* anObserver, const char* aTopic)
{
LOG(("nsObserverService::RemoveObserver(%p: %s)",
(void*) anObserver, aTopic));
NS_ENSURE_VALIDCALL
if (NS_WARN_IF(!anObserver) || NS_WARN_IF(!aTopic))
return NS_ERROR_INVALID_ARG;
nsObserverList *observerList = mObserverTopicTable.GetEntry(aTopic);
if (!observerList)
return NS_ERROR_FAILURE;
/* This death grip is to protect against stupid consumers who call
RemoveObserver from their Destructor, see bug 485834/bug 325392. */
nsCOMPtr<nsIObserver> kungFuDeathGrip(anObserver);
return observerList->RemoveObserver(anObserver);
}
NS_IMETHODIMP
nsObserverService::EnumerateObservers(const char* aTopic,
nsISimpleEnumerator** anEnumerator)
{
NS_ENSURE_VALIDCALL
if (NS_WARN_IF(!anEnumerator) || NS_WARN_IF(!aTopic))
return NS_ERROR_INVALID_ARG;
nsObserverList *observerList = mObserverTopicTable.GetEntry(aTopic);
if (!observerList)
return NS_NewEmptyEnumerator(anEnumerator);
return observerList->GetObserverList(anEnumerator);
}
// Enumerate observers of aTopic and call Observe on each.
NS_IMETHODIMP nsObserverService::NotifyObservers(nsISupports *aSubject,
const char *aTopic,
const char16_t *someData)
{
LOG(("nsObserverService::NotifyObservers(%s)", aTopic));
NS_ENSURE_VALIDCALL
if (NS_WARN_IF(!aTopic))
return NS_ERROR_INVALID_ARG;
nsObserverList *observerList = mObserverTopicTable.GetEntry(aTopic);
if (observerList)
observerList->NotifyObservers(aSubject, aTopic, someData);
#ifdef NOTIFY_GLOBAL_OBSERVERS
observerList = mObserverTopicTable.GetEntry("*");
if (observerList)
observerList->NotifyObservers(aSubject, aTopic, someData);
#endif
return NS_OK;
}
static PLDHashOperator
UnmarkGrayObserverEntry(nsObserverList* aObserverList, void* aClosure)
{
if (aObserverList) {
aObserverList->UnmarkGrayStrongObservers();
}
return PL_DHASH_NEXT;
}
NS_IMETHODIMP
nsObserverService::UnmarkGrayStrongObservers()
{
NS_ENSURE_VALIDCALL
mObserverTopicTable.EnumerateEntries(UnmarkGrayObserverEntry, nullptr);
return NS_OK;
}