IOObject.h revision 353358 
1//===-- IOObject.h ----------------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef liblldb_Host_Common_IOObject_h_
10#define liblldb_Host_Common_IOObject_h_
11
12#include <stdarg.h>
13#include <stdio.h>
14#include <sys/types.h>
15
16#include "lldb/lldb-private.h"
17
18namespace lldb_private {
19
20class IOObject {
21public:
22  enum FDType {
23    eFDTypeFile,   // Other FD requiring read/write
24    eFDTypeSocket, // Socket requiring send/recv
25  };
26
27  // TODO: On Windows this should be a HANDLE, and wait should use
28  // WaitForMultipleObjects
29  typedef int WaitableHandle;
30  static const WaitableHandle kInvalidHandleValue;
31
32  IOObject(FDType type, bool should_close)
33      : m_fd_type(type), m_should_close_fd(should_close) {}
34  virtual ~IOObject();
35
36  virtual Status Read(void *buf, size_t &num_bytes) = 0;
37  virtual Status Write(const void *buf, size_t &num_bytes) = 0;
38  virtual bool IsValid() const = 0;
39  virtual Status Close() = 0;
40
41  FDType GetFdType() const { return m_fd_type; }
42
43  virtual WaitableHandle GetWaitableHandle() = 0;
44
45protected:
46  FDType m_fd_type;
47  bool m_should_close_fd; // True if this class should close the file descriptor
48                          // when it goes away.
49
50private:
51  DISALLOW_COPY_AND_ASSIGN(IOObject);
52};
53} // namespace lldb_private
54
55#endif
56