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/*
* Copyright (C) 2025 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "RTCDataChannelHandlerClient.h"
#if ENABLE(WEB_RTC)
#include "RTCDataChannel.h"
#include <wtf/HashMap.h>
#include <wtf/Lock.h>
#include <wtf/NeverDestroyed.h>
namespace WebCore {
static Lock s_rtcDataChannelHandlerClientsLock;
static HashMap<RTCDataChannelLocalIdentifier, std::pair<std::optional<ScriptExecutionContextIdentifier>, WeakPtr<RTCDataChannelHandlerClient>>>& rtcDataChannelHandlerClients() WTF_REQUIRES_LOCK(s_rtcDataChannelHandlerClientsLock)
{
static NeverDestroyed<HashMap<RTCDataChannelLocalIdentifier, std::pair<std::optional<ScriptExecutionContextIdentifier>, WeakPtr<RTCDataChannelHandlerClient>>>> map;
return map;
}
void RTCDataChannelHandlerClient::peerConnectionIsClosing(RTCDataChannelIdentifier identifier)
{
ASSERT(isMainThread());
RefPtr<RTCDataChannelHandlerClient> mainThreadClient;
{
Locker locker { s_rtcDataChannelHandlerClientsLock };
auto iterator = rtcDataChannelHandlerClients().find(identifier.object());
if (iterator != rtcDataChannelHandlerClients().end()) {
if (iterator->value.first) {
ScriptExecutionContext::postTaskTo(*iterator->value.first, [weakClient = iterator->value.second](auto&) {
if (RefPtr client = weakClient.get())
client->peerConnectionIsClosing();
});
return;
}
mainThreadClient = iterator->value.second.get();
}
}
if (mainThreadClient) {
mainThreadClient->peerConnectionIsClosing();
return;
}
RTCDataChannel::removeDetachedRTCDataChannel(identifier);
}
RTCDataChannelHandlerClient::RTCDataChannelHandlerClient(std::optional<ScriptExecutionContextIdentifier> contextIdentifier, RTCDataChannelIdentifier identifier)
: m_identifier(identifier)
{
Locker locker { s_rtcDataChannelHandlerClientsLock };
ASSERT(!rtcDataChannelHandlerClients().contains(m_identifier.object()));
rtcDataChannelHandlerClients().add(m_identifier.object(), std::make_pair(contextIdentifier, WeakPtr { *this }));
}
RTCDataChannelHandlerClient::~RTCDataChannelHandlerClient()
{
unregister();
}
void RTCDataChannelHandlerClient::unregister()
{
if (m_isUnregistered)
return;
m_isUnregistered = true;
Locker locker { s_rtcDataChannelHandlerClientsLock };
ASSERT(rtcDataChannelHandlerClients().contains(m_identifier.object()));
ASSERT(rtcDataChannelHandlerClients().get(m_identifier.object()).second.get() == this);
rtcDataChannelHandlerClients().remove(m_identifier.object());
}
} // namespace WebCore
#endif // ENABLE(WEB_RTC)
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