llvm-project/lldb/source/Core/StreamCallback.cpp

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

#include <stdio.h>

#include "lldb/lldb-private.h"
#include "lldb/Core/Broadcaster.h"
#include "lldb/Core/Event.h"
#include "lldb/Core/StreamCallback.h"
#include "lldb/Host/Host.h"

using namespace lldb;
using namespace lldb_private;


StreamCallback::StreamCallback (lldb::LogOutputCallback callback, void *baton) :
    Stream (0, 4, eByteOrderBig),
    m_callback (callback),
    m_baton (baton),
    m_accumulated_data (),
    m_collection_mutex ()
{
}

StreamCallback::~StreamCallback ()
{
}

StreamString &
StreamCallback::FindStreamForThread(lldb::tid_t cur_tid)
{
    Mutex::Locker locker(m_collection_mutex);
    collection::iterator iter = m_accumulated_data.find (cur_tid);
    if (iter == m_accumulated_data.end())
    {
        std::pair<collection::iterator, bool> ret;
        ret = m_accumulated_data.insert(std::pair<lldb::tid_t,StreamString>(cur_tid, StreamString()));
        iter = ret.first;
    }
    return (*iter).second;
}

void
StreamCallback::Flush ()
{
    lldb::tid_t cur_tid = Host::GetCurrentThreadID();
    StreamString &out_stream = FindStreamForThread(cur_tid);
    m_callback (out_stream.GetData(), m_baton);
    out_stream.Clear();
}

size_t
StreamCallback::Write (const void *s, size_t length)
{
    lldb::tid_t cur_tid = Host::GetCurrentThreadID();
    FindStreamForThread(cur_tid).Write (s, length);
    return length;
}