hanchenye-llvm-project/lldb/tools/lldb-mi/MICmdMgrSetCmdDeleteCallback.cpp

//===-- MICmdMgrSetCmdDeleteCallback.cpp ------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// In-house headers:
#include "MICmdMgrSetCmdDeleteCallback.h"

namespace CMICmdMgrSetCmdDeleteCallback
{

//++ ------------------------------------------------------------------------------------
// Details: CSetClients constructor.
// Type:    Method.
// Args:    None.
// Return:  None.
// Throws:  None.
//--
CSetClients::CSetClients(void)
    : m_bClientUnregistered(false)
{
}

//++ ------------------------------------------------------------------------------------
// Details: CSetClients destructor.
// Type:    Method.
// Args:    None.
// Return:  None.
// Throws:  None.
//--
CSetClients::~CSetClients(void)
{
}

//++ ------------------------------------------------------------------------------------
// Details: Register an object to be called when a command object is deleted.
// Type:    Method.
// Args:    vObject - (R) A new interested client.
// Return:  MIstatus::success - Functional succeeded.
//          MIstatus::failure - Functional failed.
// Throws:  None.
//--
bool
CSetClients::Register(ICallback &vObject)
{
    insert(&vObject);

    return MIstatus::success;
}

//++ ------------------------------------------------------------------------------------
// Details: Unregister an object from being called when a command object is deleted.
// Type:    Method.
// Args:    vObject - (R) The was interested client.
// Return:  MIstatus::success - Functional succeeded.
//          MIstatus::failure - Functional failed.
// Throws:  None.
//--
bool
CSetClients::Unregister(ICallback &vObject)
{
    m_bClientUnregistered = true;
    erase(&vObject);

    return MIstatus::success;
}

//++ ------------------------------------------------------------------------------------
// Details: Iterate all interested clients and tell them a command is being deleted.
// Type:    Method.
// Args:    vCmd    - (RW) The command to be deleted.
// Return:  MIstatus::success - Functional succeeded.
//          MIstatus::failure - Functional failed.
// Throws:  None.
//--
void
CSetClients::Delete(SMICmdData &vCmd)
{
    m_bClientUnregistered = false; // Reset
    iterator it = begin();
    while (it != end())
    {
        ICallback *pObj = *it;
        pObj->Delete(vCmd);

        if (m_bClientUnregistered)
        {
            m_bClientUnregistered = false; // Reset
            it = begin();
        }
        else
            // Next
            ++it;
    }
}

} // namespace CMICmdMgrSetCmdDeleteCallback