IOHandlerProcessSTDIOWindows.h

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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#ifndef LIBLLDB_PLUGINS_PROCESS_WINDOWS_COMMON_IO_HANDLER_PROCESS_STDIO_WINDOWS_H_
#define LIBLLDB_PLUGINS_PROCESS_WINDOWS_COMMON_IO_HANDLER_PROCESS_STDIO_WINDOWS_H_
 
#include "lldb/Core/IOHandler.h"
#include "lldb/Host/File.h"
#include "lldb/Target/Process.h"
 
using HANDLE = void *;
 
using namespace lldb_private;
 
class IOHandlerProcessSTDIOWindows : public IOHandler {
public:
  IOHandlerProcessSTDIOWindows(Process *process);
 
  ~IOHandlerProcessSTDIOWindows() override;
 
  void SetIsRunning(bool running);
 
  /// Peek the console for input. If it has any, drain the pipe until text input
  /// is found or the pipe is empty.
  ///
  /// \param hStdin
  ///     The handle to the standard input's pipe.
  ///
  /// \return
  ///     true if the pipe has text input.
  llvm::Expected<bool> ConsoleHasTextInput(const HANDLE hStdin);
 
  void Run() override;
 
  void Cancel() override;
 
  bool Interrupt() override;
 
  void GotEOF() override {}
 
private:
  enum ControlOp : char {
    eControlOpQuit = 'q',
    eControlOpInterrupt = 'i',
    eControlOpNone = 0,
  };
 
  Process *m_process;
  /// Read from this file (usually actual STDIN for LLDB)
  NativeFile m_read_file;
  HANDLE m_interrupt_event =
      reinterpret_cast<HANDLE>(static_cast<intptr_t>(-1));
  std::atomic<ControlOp> m_pending_op{eControlOpNone};
  std::mutex m_mutex;
  bool m_is_running = false;
};
 
#endif // LIBLLDB_PLUGINS_PROCESS_WINDOWS_COMMON_IO_HANDLER_PROCESS_STDIO_WINDOWS_H_