97206d5727
This renames the LLDB error class to Status, as discussed on the lldb-dev mailing list. A change of this magnitude cannot easily be done without find and replace, but that has potential to catch unwanted occurrences of common strings such as "Error". Every effort was made to find all the obvious things such as the word "Error" appearing in a string, etc, but it's possible there are still some lingering occurences left around. Hopefully nothing too serious. llvm-svn: 302872
83 lines
2.2 KiB
C++
83 lines
2.2 KiB
C++
//===-- LockFileBase.cpp ----------------------------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "lldb/Host/LockFileBase.h"
|
|
|
|
using namespace lldb;
|
|
using namespace lldb_private;
|
|
|
|
namespace {
|
|
|
|
Status AlreadyLocked() { return Status("Already locked"); }
|
|
|
|
Status NotLocked() { return Status("Not locked"); }
|
|
}
|
|
|
|
LockFileBase::LockFileBase(int fd)
|
|
: m_fd(fd), m_locked(false), m_start(0), m_len(0) {}
|
|
|
|
bool LockFileBase::IsLocked() const { return m_locked; }
|
|
|
|
Status LockFileBase::WriteLock(const uint64_t start, const uint64_t len) {
|
|
return DoLock([&](const uint64_t start,
|
|
const uint64_t len) { return DoWriteLock(start, len); },
|
|
start, len);
|
|
}
|
|
|
|
Status LockFileBase::TryWriteLock(const uint64_t start, const uint64_t len) {
|
|
return DoLock([&](const uint64_t start,
|
|
const uint64_t len) { return DoTryWriteLock(start, len); },
|
|
start, len);
|
|
}
|
|
|
|
Status LockFileBase::ReadLock(const uint64_t start, const uint64_t len) {
|
|
return DoLock([&](const uint64_t start,
|
|
const uint64_t len) { return DoReadLock(start, len); },
|
|
start, len);
|
|
}
|
|
|
|
Status LockFileBase::TryReadLock(const uint64_t start, const uint64_t len) {
|
|
return DoLock([&](const uint64_t start,
|
|
const uint64_t len) { return DoTryReadLock(start, len); },
|
|
start, len);
|
|
}
|
|
|
|
Status LockFileBase::Unlock() {
|
|
if (!IsLocked())
|
|
return NotLocked();
|
|
|
|
const auto error = DoUnlock();
|
|
if (error.Success()) {
|
|
m_locked = false;
|
|
m_start = 0;
|
|
m_len = 0;
|
|
}
|
|
return error;
|
|
}
|
|
|
|
bool LockFileBase::IsValidFile() const { return m_fd != -1; }
|
|
|
|
Status LockFileBase::DoLock(const Locker &locker, const uint64_t start,
|
|
const uint64_t len) {
|
|
if (!IsValidFile())
|
|
return Status("File is invalid");
|
|
|
|
if (IsLocked())
|
|
return AlreadyLocked();
|
|
|
|
const auto error = locker(start, len);
|
|
if (error.Success()) {
|
|
m_locked = true;
|
|
m_start = start;
|
|
m_len = len;
|
|
}
|
|
|
|
return error;
|
|
}
|