================ @@ -0,0 +1,88 @@ +//===-- Alarm.h -------------------------------------------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#ifndef LLDB_HOST_ALARM_H +#define LLDB_HOST_ALARM_H + +#include "lldb/Host/HostThread.h" +#include "lldb/lldb-types.h" +#include "llvm/Support/Chrono.h" + +namespace lldb_private { + +class Alarm { +public: + using Handle = uint64_t; + using Callback = std::function<void()>; + using TimePoint = llvm::sys::TimePoint<>; + using Duration = std::chrono::milliseconds; + + Alarm(Duration timeout, bool run_callback_on_exit = false); + ~Alarm(); + + Handle Create(Callback callback); + bool Restart(Handle handle); + bool Cancel(Handle handle); + + static constexpr Handle INVALID_HANDLE = 0; + +private: + /// Helper functions to start, stop and check the status of the alarm thread. + /// @{ + void StartAlarmThread(); + void StopAlarmThread(); + bool AlarmThreadRunning(); + /// @} + + /// Return an unique, monotonically increasing handle. + static Handle GetNextUniqueHandle(); + + TimePoint GetNextExpiration() const; + + /// Alarm entry. + struct Entry { + Handle handle; + Callback callback; + TimePoint expiration; + + Entry(Callback callback, TimePoint expiration); + bool operator==(const Entry &rhs) { return handle == rhs.handle; } + }; + + /// List of alarm entries. + std::vector<Entry> m_entries; + + /// Timeout between when an alarm is created and when it fires. + Duration m_timeout; + + /// The alarm thread. + /// @{ + HostThread m_alarm_thread; + lldb::thread_result_t AlarmThread(); + /// @} + + /// Synchronize access between the alarm thread and the main thread. + std::mutex m_alarm_mutex; + + /// Condition variable used to wake up the alarm thread. + std::condition_variable m_alarm_cv; + + /// Flag to signal the alarm thread that something changed and we need to + // recompute the next alarm. ---------------- chelcassanova wrote:
nit: missing third slash for doxygen? https://github.com/llvm/llvm-project/pull/84854 _______________________________________________ lldb-commits mailing list lldb-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits
