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Use a static mutex for getting deviceId keys in MediaParent.

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This commit is contained in:
wolfbeast 2018-02-08 23:15:39 +01:00 • committed by Roy Tam
commit 60036bd843
1 changed files with 22 additions and 12 deletions
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34
dom/media/systemservices/MediaParent.cpp
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@ -37,6 +37,7 @@ mozilla::LazyLogModule gMediaParentLog("MediaParent");
namespace mozilla {
namespace media {
StaticMutex sOriginKeyStoreMutex;
static OriginKeyStore* sOriginKeyStore = nullptr;
class OriginKeyStore : public nsISupports
@ -332,6 +333,7 @@ class OriginKeyStore : public nsISupports
private:
virtual ~OriginKeyStore()
{
StaticMutexAutoLock lock(sOriginKeyStoreMutex);
sOriginKeyStore = nullptr;
LOG((__FUNCTION__));
}
@ -340,6 +342,7 @@ public:
static OriginKeyStore* Get()
{
MOZ_ASSERT(NS_IsMainThread());
StaticMutexAutoLock lock(sOriginKeyStoreMutex);
if (!sOriginKeyStore) {
sOriginKeyStore = new OriginKeyStore();
}
@ -384,8 +387,8 @@ Parent<Super>::RecvGetOriginKey(const uint32_t& aRequestId,
return false;
}
// Then over to stream-transport thread to do the actual file io.
// Stash a pledge to hold the answer and get an id for this request.
// Then over to stream-transport thread (a thread pool) to do the actual
// file io. Stash a pledge to hold the answer and get an id for this request.
RefPtr<Pledge<nsCString>> p = new Pledge<nsCString>();
uint32_t id = mOutstandingPledges.Append(*p);
@ -397,12 +400,17 @@ Parent<Super>::RecvGetOriginKey(const uint32_t& aRequestId,
rv = sts->Dispatch(NewRunnableFrom([this, that, id, profileDir, aOrigin,
aPrivateBrowsing, aPersist]() -> nsresult {
MOZ_ASSERT(!NS_IsMainThread());
mOriginKeyStore->mOriginKeys.SetProfileDir(profileDir);
StaticMutexAutoLock lock(sOriginKeyStoreMutex);
if (!sOriginKeyStore) {
return NS_ERROR_FAILURE;
}
sOriginKeyStore->mOriginKeys.SetProfileDir(profileDir);
nsCString result;
if (aPrivateBrowsing) {
mOriginKeyStore->mPrivateBrowsingOriginKeys.GetOriginKey(aOrigin, result);
sOriginKeyStore->mPrivateBrowsingOriginKeys.GetOriginKey(aOrigin, result);
} else {
mOriginKeyStore->mOriginKeys.GetOriginKey(aOrigin, result, aPersist);
sOriginKeyStore->mOriginKeys.GetOriginKey(aOrigin, result, aPersist);
}
// Pass result back to main thread.
@ -450,19 +458,21 @@ Parent<Super>::RecvSanitizeOriginKeys(const uint64_t& aSinceWhen,
if (NS_WARN_IF(NS_FAILED(rv))) {
return false;
}
// Over to stream-transport thread to do the file io.
// Over to stream-transport thread (a thread pool) to do the file io.
nsCOMPtr<nsIEventTarget> sts = do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
MOZ_ASSERT(sts);
RefPtr<OriginKeyStore> store(mOriginKeyStore);
rv = sts->Dispatch(NewRunnableFrom([profileDir, store, aSinceWhen,
rv = sts->Dispatch(NewRunnableFrom([profileDir, aSinceWhen,
aOnlyPrivateBrowsing]() -> nsresult {
MOZ_ASSERT(!NS_IsMainThread());
store->mPrivateBrowsingOriginKeys.Clear(aSinceWhen);
StaticMutexAutoLock lock(sOriginKeyStoreMutex);
if (!sOriginKeyStore) {
return NS_ERROR_FAILURE;
}
sOriginKeyStore->mPrivateBrowsingOriginKeys.Clear(aSinceWhen);
if (!aOnlyPrivateBrowsing) {
store->mOriginKeys.SetProfileDir(profileDir);
store->mOriginKeys.Clear(aSinceWhen);
sOriginKeyStore->mOriginKeys.SetProfileDir(profileDir);
sOriginKeyStore->mOriginKeys.Clear(aSinceWhen);
}
return NS_OK;
}), NS_DISPATCH_NORMAL);