cleanup.cpp

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#include <list>
#include <algorithm>
 
#include "cleanup.h"
 
class CleanupHooksImp
{
  private:
    using clean_list = std::list<CleanupProc *>;
 
  private:
    clean_list m_cleanList;
 
  public:
    void addHook(CleanupProc *clean_proc)
    {
        m_cleanList.push_back(clean_proc);
    }
 
    void removeHook(CleanupProc *clean_proc)
    {
        auto p = std::find(m_cleanList.begin(), m_cleanList.end(), clean_proc);
        if (p != m_cleanList.end())
        {
            m_cleanList.erase(p);
        }
    }
 
    void cleanup()
    {
        for (auto & item : m_cleanList)
            item->doClean();
        m_cleanList.clear();
    }
};
 
namespace
{
    CleanupHooks *g_cleanup_hooks = nullptr;
}
 
CleanupHooks *CleanupHooks::getInstance()
{
    if (!g_cleanup_hooks)
    {
        g_cleanup_hooks = new CleanupHooks();
    }
    return g_cleanup_hooks;
}
 
void CleanupHooks::addHook(CleanupProc *clean_proc)
{
    m_imp->addHook(clean_proc);
}
 
void CleanupHooks::removeHook(CleanupProc *clean_proc)
{
    m_imp->removeHook(clean_proc);
}
 
void CleanupHooks::cleanup()
{
    m_imp->cleanup();
    delete g_cleanup_hooks;
    g_cleanup_hooks = nullptr;
}
 
CleanupHooks::CleanupHooks()
  : m_imp(new CleanupHooksImp())
{
}
 
CleanupHooks::~CleanupHooks()
{
    delete m_imp;
}