1 //===-- LockFileBase.h ------------------------------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef liblldb_Host_LockFileBase_h_
11 #define liblldb_Host_LockFileBase_h_
13 #include "lldb/Core/Error.h"
17 namespace lldb_private {
21 virtual ~LockFileBase() = default;
23 bool IsLocked() const;
25 Error WriteLock(const uint64_t start, const uint64_t len);
26 Error TryWriteLock(const uint64_t start, const uint64_t len);
28 Error ReadLock(const uint64_t start, const uint64_t len);
29 Error TryReadLock(const uint64_t start, const uint64_t len);
34 using Locker = std::function<Error(const uint64_t, const uint64_t)>;
38 virtual bool IsValidFile() const;
40 virtual Error DoWriteLock(const uint64_t start, const uint64_t len) = 0;
41 virtual Error DoTryWriteLock(const uint64_t start, const uint64_t len) = 0;
43 virtual Error DoReadLock(const uint64_t start, const uint64_t len) = 0;
44 virtual Error DoTryReadLock(const uint64_t start, const uint64_t len) = 0;
46 virtual Error DoUnlock() = 0;
48 Error DoLock(const Locker &locker, const uint64_t start, const uint64_t len);
50 int m_fd; // not owned.