1 files changed, 371 insertions, 0 deletions

diff --git a/xbmc/utils/ActorProtocol.cpp b/xbmc/utils/ActorProtocol.cpp
new file mode 100644
index 0000000..f83d2fc
--- /dev/null
+++ b/xbmc/utils/ActorProtocol.cpp
@@ -0,0 +1,371 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: LGPL-2.1-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#include "ActorProtocol.h"
+
+#include "threads/Event.h"
+
+#include <cstring>
+
+using namespace Actor;
+
+void Message::Release()
+{
+  bool skip;
+  origin.Lock();
+  skip = isSync ? !isSyncFini : false;
+  isSyncFini = true;
+  origin.Unlock();
+
+  if (skip)
+    return;
+
+  // free data buffer
+  if (data != buffer)
+    delete [] data;
+
+  payloadObj.reset();
+
+  // delete event in case of sync message
+  delete event;
+
+  origin.ReturnMessage(this);
+}
+
+bool Message::Reply(int sig, void *data /* = NULL*/, size_t size /* = 0 */)
+{
+  if (!isSync)
+  {
+    if (isOut)
+      return origin.SendInMessage(sig, data, size);
+    else
+      return origin.SendOutMessage(sig, data, size);
+  }
+
+  origin.Lock();
+
+  if (!isSyncTimeout)
+  {
+    Message *msg = origin.GetMessage();
+    msg->signal = sig;
+    msg->isOut = !isOut;
+    replyMessage = msg;
+    if (data)
+    {
+      if (size > sizeof(msg->buffer))
+        msg->data = new uint8_t[size];
+      else
+        msg->data = msg->buffer;
+      memcpy(msg->data, data, size);
+    }
+  }
+
+  origin.Unlock();
+
+  if (event)
+    event->Set();
+
+  return true;
+}
+
+Protocol::~Protocol()
+{
+  Message *msg;
+  Purge();
+  while (!freeMessageQueue.empty())
+  {
+    msg = freeMessageQueue.front();
+    freeMessageQueue.pop();
+    delete msg;
+  }
+}
+
+Message *Protocol::GetMessage()
+{
+  Message *msg;
+
+  CSingleLock lock(criticalSection);
+
+  if (!freeMessageQueue.empty())
+  {
+    msg = freeMessageQueue.front();
+    freeMessageQueue.pop();
+  }
+  else
+    msg = new Message(*this);
+
+  msg->isSync = false;
+  msg->isSyncFini = false;
+  msg->isSyncTimeout = false;
+  msg->event = NULL;
+  msg->data = NULL;
+  msg->payloadSize = 0;
+  msg->replyMessage = NULL;
+
+  return msg;
+}
+
+void Protocol::ReturnMessage(Message *msg)
+{
+  CSingleLock lock(criticalSection);
+
+  freeMessageQueue.push(msg);
+}
+
+bool Protocol::SendOutMessage(int signal,
+                              const void* data /* = NULL */,
+                              size_t size /* = 0 */,
+                              Message* outMsg /* = NULL */)
+{
+  Message *msg;
+  if (outMsg)
+    msg = outMsg;
+  else
+    msg = GetMessage();
+
+  msg->signal = signal;
+  msg->isOut = true;
+
+  if (data)
+  {
+    if (size > sizeof(msg->buffer))
+      msg->data = new uint8_t[size];
+    else
+      msg->data = msg->buffer;
+    memcpy(msg->data, data, size);
+  }
+
+  { CSingleLock lock(criticalSection);
+    outMessages.push(msg);
+  }
+  if (containerOutEvent)
+    containerOutEvent->Set();
+
+  return true;
+}
+
+bool Protocol::SendOutMessage(int signal, CPayloadWrapBase *payload, Message *outMsg)
+{
+  Message *msg;
+  if (outMsg)
+    msg = outMsg;
+  else
+    msg = GetMessage();
+
+  msg->signal = signal;
+  msg->isOut = true;
+
+  msg->payloadObj.reset(payload);
+
+  { CSingleLock lock(criticalSection);
+    outMessages.push(msg);
+  }
+  if (containerOutEvent)
+    containerOutEvent->Set();
+
+  return true;
+}
+
+bool Protocol::SendInMessage(int signal,
+                             const void* data /* = NULL */,
+                             size_t size /* = 0 */,
+                             Message* outMsg /* = NULL */)
+{
+  Message *msg;
+  if (outMsg)
+    msg = outMsg;
+  else
+    msg = GetMessage();
+
+  msg->signal = signal;
+  msg->isOut = false;
+
+  if (data)
+  {
+    if (size > sizeof(msg->data))
+      msg->data = new uint8_t[size];
+    else
+      msg->data = msg->buffer;
+    memcpy(msg->data, data, size);
+  }
+
+  { CSingleLock lock(criticalSection);
+    inMessages.push(msg);
+  }
+  if (containerInEvent)
+    containerInEvent->Set();
+
+  return true;
+}
+
+bool Protocol::SendInMessage(int signal, CPayloadWrapBase *payload, Message *outMsg)
+{
+  Message *msg;
+  if (outMsg)
+    msg = outMsg;
+  else
+    msg = GetMessage();
+
+  msg->signal = signal;
+  msg->isOut = false;
+
+  msg->payloadObj.reset(payload);
+
+  { CSingleLock lock(criticalSection);
+    inMessages.push(msg);
+  }
+  if (containerInEvent)
+    containerInEvent->Set();
+
+  return true;
+}
+
+bool Protocol::SendOutMessageSync(
+    int signal, Message** retMsg, int timeout, const void* data /* = NULL */, size_t size /* = 0 */)
+{
+  Message *msg = GetMessage();
+  msg->isOut = true;
+  msg->isSync = true;
+  msg->event = new CEvent;
+  msg->event->Reset();
+  SendOutMessage(signal, data, size, msg);
+
+  if (!msg->event->WaitMSec(timeout))
+  {
+    const CSingleLock lock(criticalSection);
+    if (msg->replyMessage)
+      *retMsg = msg->replyMessage;
+    else
+    {
+      *retMsg = NULL;
+      msg->isSyncTimeout = true;
+    }
+  }
+  else
+    *retMsg = msg->replyMessage;
+
+  msg->Release();
+
+  if (*retMsg)
+    return true;
+  else
+    return false;
+}
+
+bool Protocol::SendOutMessageSync(int signal, Message **retMsg, int timeout, CPayloadWrapBase *payload)
+{
+  Message *msg = GetMessage();
+  msg->isOut = true;
+  msg->isSync = true;
+  msg->event = new CEvent;
+  msg->event->Reset();
+  SendOutMessage(signal, payload, msg);
+
+  if (!msg->event->WaitMSec(timeout))
+  {
+    const CSingleLock lock(criticalSection);
+    if (msg->replyMessage)
+      *retMsg = msg->replyMessage;
+    else
+    {
+      *retMsg = NULL;
+      msg->isSyncTimeout = true;
+    }
+  }
+  else
+    *retMsg = msg->replyMessage;
+
+  msg->Release();
+
+  if (*retMsg)
+    return true;
+  else
+    return false;
+}
+
+bool Protocol::ReceiveOutMessage(Message **msg)
+{
+  CSingleLock lock(criticalSection);
+
+  if (outMessages.empty() || outDefered)
+    return false;
+
+  *msg = outMessages.front();
+  outMessages.pop();
+
+  return true;
+}
+
+bool Protocol::ReceiveInMessage(Message **msg)
+{
+  CSingleLock lock(criticalSection);
+
+  if (inMessages.empty() || inDefered)
+    return false;
+
+  *msg = inMessages.front();
+  inMessages.pop();
+
+  return true;
+}
+
+
+void Protocol::Purge()
+{
+  Message *msg;
+
+  while (ReceiveInMessage(&msg))
+    msg->Release();
+
+  while (ReceiveOutMessage(&msg))
+    msg->Release();
+}
+
+void Protocol::PurgeIn(int signal)
+{
+  Message *msg;
+  std::queue<Message*> msgs;
+
+  CSingleLock lock(criticalSection);
+
+  while (!inMessages.empty())
+  {
+    msg = inMessages.front();
+    inMessages.pop();
+    if (msg->signal != signal)
+      msgs.push(msg);
+  }
+  while (!msgs.empty())
+  {
+    msg = msgs.front();
+    msgs.pop();
+    inMessages.push(msg);
+  }
+}
+
+void Protocol::PurgeOut(int signal)
+{
+  Message *msg;
+  std::queue<Message*> msgs;
+
+  CSingleLock lock(criticalSection);
+
+  while (!outMessages.empty())
+  {
+    msg = outMessages.front();
+    outMessages.pop();
+    if (msg->signal != signal)
+      msgs.push(msg);
+  }
+  while (!msgs.empty())
+  {
+    msg = msgs.front();
+    msgs.pop();
+    outMessages.push(msg);
+  }
+}