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969ed3d10f
command line driver, including the lldb prompt being output by editline, the asynchronous process output & error messages, and asynchronous messages written by target stop-hooks. As part of this it introduces a new Stream class, StreamAsynchronousIO. A StreamAsynchronousIO object is created with a broadcaster, who will eventually broadcast the stream's data for a listener to handle, and an event type indicating what type of event the broadcaster will broadcast. When the Write method is called on a StreamAsynchronousIO object, the data is appended to an internal string. When the Flush method is called on a StreamAsynchronousIO object, it broadcasts it's data string and clears the string. Anything in lldb-core that needs to generate asynchronous output for the end-user should use the StreamAsynchronousIO objects. I have also added a new notification type for InputReaders, to let them know that a asynchronous output has been written. This is to allow the input readers to, for example, refresh their prompts and lines, if desired. I added the case statements to all the input readers to catch this notification, but I haven't added any code for handling them yet (except to the IOChannel input reader). llvm-svn: 130721
53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
//===-- StreamBroadcast.cpp -------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include <stdio.h>
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#include "lldb/lldb-private.h"
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#include "lldb/Core/Broadcaster.h"
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#include "lldb/Core/Event.h"
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#include "lldb/Core/StreamAsynchronousIO.h"
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using namespace lldb;
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using namespace lldb_private;
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StreamAsynchronousIO::StreamAsynchronousIO (Broadcaster &broadcaster, uint32_t broadcast_event_type) :
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Stream (0, 4, eByteOrderBig),
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m_broadcaster (broadcaster),
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m_broadcast_event_type (broadcast_event_type),
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m_accumulated_data ()
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{
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}
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StreamAsynchronousIO::~StreamAsynchronousIO ()
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{
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}
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void
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StreamAsynchronousIO::Flush ()
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{
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if (m_accumulated_data.GetSize() > 0)
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{
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std::auto_ptr<EventDataBytes> data_bytes_ap (new EventDataBytes);
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// Let's swap the bytes to avoid LARGE string copies.
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data_bytes_ap->SwapBytes (m_accumulated_data.GetString());
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EventSP new_event_sp (new Event (m_broadcast_event_type, data_bytes_ap.release()));
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m_broadcaster.BroadcastEvent (new_event_sp);
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m_accumulated_data.Clear();
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}
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}
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int
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StreamAsynchronousIO::Write (const void *s, size_t length)
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{
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m_accumulated_data.Write (s, length);
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return length;
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}
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