1 //===-- PipePosix.h ---------------------------------------------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef liblldb_Host_posix_PipePosix_h_
11 #define liblldb_Host_posix_PipePosix_h_
12 #if defined(__cplusplus)
13 
14 #include "lldb/Host/PipeBase.h"
15 
16 namespace lldb_private {
17 
18 //----------------------------------------------------------------------
19 /// @class PipePosix PipePosix.h "lldb/Host/posix/PipePosix.h"
20 /// A posix-based implementation of Pipe, a class that abtracts
21 ///        unix style pipes.
22 ///
23 /// A class that abstracts the LLDB core from host pipe functionality.
24 //----------------------------------------------------------------------
25 class PipePosix : public PipeBase {
26 public:
27   static int kInvalidDescriptor;
28 
29   PipePosix();
30   PipePosix(lldb::pipe_t read, lldb::pipe_t write);
31   PipePosix(const PipePosix &) = delete;
32   PipePosix(PipePosix &&pipe_posix);
33   PipePosix &operator=(const PipePosix &) = delete;
34   PipePosix &operator=(PipePosix &&pipe_posix);
35 
36   ~PipePosix() override;
37 
38   Status CreateNew(bool child_process_inherit) override;
39   Status CreateNew(llvm::StringRef name, bool child_process_inherit) override;
40   Status CreateWithUniqueName(llvm::StringRef prefix,
41                               bool child_process_inherit,
42                               llvm::SmallVectorImpl<char> &name) override;
43   Status OpenAsReader(llvm::StringRef name,
44                       bool child_process_inherit) override;
45   Status
46   OpenAsWriterWithTimeout(llvm::StringRef name, bool child_process_inherit,
47                           const std::chrono::microseconds &timeout) override;
48 
49   bool CanRead() const override;
50   bool CanWrite() const override;
51 
GetReadPipe()52   lldb::pipe_t GetReadPipe() const override {
53     return lldb::pipe_t(GetReadFileDescriptor());
54   }
GetWritePipe()55   lldb::pipe_t GetWritePipe() const override {
56     return lldb::pipe_t(GetWriteFileDescriptor());
57   }
58 
59   int GetReadFileDescriptor() const override;
60   int GetWriteFileDescriptor() const override;
61   int ReleaseReadFileDescriptor() override;
62   int ReleaseWriteFileDescriptor() override;
63   void CloseReadFileDescriptor() override;
64   void CloseWriteFileDescriptor() override;
65 
66   // Close both descriptors
67   void Close() override;
68 
69   Status Delete(llvm::StringRef name) override;
70 
71   Status Write(const void *buf, size_t size, size_t &bytes_written) override;
72   Status ReadWithTimeout(void *buf, size_t size,
73                          const std::chrono::microseconds &timeout,
74                          size_t &bytes_read) override;
75 
76 private:
77   int m_fds[2];
78 };
79 
80 } // namespace lldb_private
81 
82 #endif // #if defined(__cplusplus)
83 #endif // liblldb_Host_posix_PipePosix_h_
84