1 //===-- LockFileBase.cpp ----------------------------------------*- 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 #include "lldb/Host/LockFileBase.h"
13 using namespace lldb_private;
17 Error AlreadyLocked() { return Error("Already locked"); }
19 Error NotLocked() { return Error("Not locked"); }
22 LockFileBase::LockFileBase(int fd)
23 : m_fd(fd), m_locked(false), m_start(0), m_len(0) {}
25 bool LockFileBase::IsLocked() const { return m_locked; }
27 Error LockFileBase::WriteLock(const uint64_t start, const uint64_t len) {
28 return DoLock([&](const uint64_t start,
29 const uint64_t len) { return DoWriteLock(start, len); },
33 Error LockFileBase::TryWriteLock(const uint64_t start, const uint64_t len) {
34 return DoLock([&](const uint64_t start,
35 const uint64_t len) { return DoTryWriteLock(start, len); },
39 Error LockFileBase::ReadLock(const uint64_t start, const uint64_t len) {
40 return DoLock([&](const uint64_t start,
41 const uint64_t len) { return DoReadLock(start, len); },
45 Error LockFileBase::TryReadLock(const uint64_t start, const uint64_t len) {
46 return DoLock([&](const uint64_t start,
47 const uint64_t len) { return DoTryReadLock(start, len); },
51 Error LockFileBase::Unlock() {
55 const auto error = DoUnlock();
56 if (error.Success()) {
64 bool LockFileBase::IsValidFile() const { return m_fd != -1; }
66 Error LockFileBase::DoLock(const Locker &locker, const uint64_t start,
69 return Error("File is invalid");
72 return AlreadyLocked();
74 const auto error = locker(start, len);
75 if (error.Success()) {