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/*
* Copyright (C) 2017-2021 Team Kodi
* This file is part of Kodi - https://kodi.tv
*
* SPDX-License-Identifier: GPL-2.0-or-later
* See LICENSES/README.md for more information.
*/
#pragma once
#include "interfaces/generic/ScriptInvocationManager.h"
#include "interfaces/generic/ScriptRunner.h"
#include "threads/CriticalSection.h"
#include "threads/Event.h"
#include <cstdint>
#include <map>
#include <mutex>
template<class TScript>
class CRunningScriptsHandler : protected CScriptRunner
{
protected:
using HandleType = int;
CRunningScriptsHandler() = default;
virtual ~CRunningScriptsHandler() = default;
using CScriptRunner::ExecuteScript;
using CScriptRunner::GetAddon;
using CScriptRunner::SetDone;
using CScriptRunner::StartScript;
bool RunScript(TScript* script,
const ADDON::AddonPtr& addon,
const std::string& path,
bool resume)
{
if (script == nullptr || addon == nullptr || path.empty())
return false;
// reuse an existing script handle or get a new one if necessary
int handle = CScriptInvocationManager::GetInstance().GetReusablePluginHandle(addon->LibPath());
if (handle < 0)
handle = GetNewScriptHandle(script);
else
ReuseScriptHandle(handle, script);
// run the script
auto result = CScriptRunner::RunScript(addon, path, handle, resume);
// remove the script handle if necessary
RemoveScriptHandle(handle);
return result;
}
static HandleType GetNewScriptHandle(TScript* script)
{
std::unique_lock<CCriticalSection> lock(s_critical);
uint32_t handle = ++s_scriptHandleCounter;
s_scriptHandles[handle] = script;
return handle;
}
static void ReuseScriptHandle(HandleType handle, TScript* script)
{
std::unique_lock<CCriticalSection> lock(s_critical);
s_scriptHandles[handle] = script;
}
static void RemoveScriptHandle(HandleType handle)
{
std::unique_lock<CCriticalSection> lock(s_critical);
s_scriptHandles.erase(handle);
}
static TScript* GetScriptFromHandle(HandleType handle)
{
std::unique_lock<CCriticalSection> lock(s_critical);
auto scriptHandle = s_scriptHandles.find(handle);
if (scriptHandle == s_scriptHandles.end())
return nullptr;
return scriptHandle->second;
}
static inline CCriticalSection& GetScriptsLock() { return s_critical; }
private:
static std::map<HandleType, TScript*> s_scriptHandles;
static CCriticalSection s_critical;
static HandleType s_scriptHandleCounter;
};
template<class TScript>
std::map<typename CRunningScriptsHandler<TScript>::HandleType, TScript*>
CRunningScriptsHandler<TScript>::s_scriptHandles;
template<class TScript>
CCriticalSection CRunningScriptsHandler<TScript>::s_critical;
template<class TScript>
typename CRunningScriptsHandler<TScript>::HandleType
CRunningScriptsHandler<TScript>::s_scriptHandleCounter = 0;
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