6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
//===-- LockFileBase.h ------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLDB_HOST_LOCKFILEBASE_H
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#define LLDB_HOST_LOCKFILEBASE_H
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#include "lldb/Utility/Status.h"
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#include <functional>
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namespace lldb_private {
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class LockFileBase {
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public:
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virtual ~LockFileBase() = default;
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bool IsLocked() const;
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Status WriteLock(const uint64_t start, const uint64_t len);
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Status TryWriteLock(const uint64_t start, const uint64_t len);
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Status ReadLock(const uint64_t start, const uint64_t len);
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Status TryReadLock(const uint64_t start, const uint64_t len);
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Status Unlock();
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protected:
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using Locker = std::function<Status(const uint64_t, const uint64_t)>;
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LockFileBase(int fd);
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virtual bool IsValidFile() const;
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virtual Status DoWriteLock(const uint64_t start, const uint64_t len) = 0;
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virtual Status DoTryWriteLock(const uint64_t start, const uint64_t len) = 0;
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virtual Status DoReadLock(const uint64_t start, const uint64_t len) = 0;
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virtual Status DoTryReadLock(const uint64_t start, const uint64_t len) = 0;
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virtual Status DoUnlock() = 0;
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Status DoLock(const Locker &locker, const uint64_t start, const uint64_t len);
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int m_fd; // not owned.
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bool m_locked;
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uint64_t m_start;
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uint64_t m_len;
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};
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}
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#endif
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