1//===-- PThreadEvent.h ------------------------------------------*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9//  Created by Greg Clayton on 6/16/07.
10//
11//===----------------------------------------------------------------------===//
12
13#ifndef LLDB_TOOLS_DEBUGSERVER_SOURCE_PTHREADEVENT_H
14#define LLDB_TOOLS_DEBUGSERVER_SOURCE_PTHREADEVENT_H
15#include "PThreadCondition.h"
16#include "PThreadMutex.h"
17#include <cstdint>
18#include <ctime>
19
20class PThreadEvent {
21public:
22  PThreadEvent(uint32_t bits = 0, uint32_t validBits = 0);
23  ~PThreadEvent();
24
25  uint32_t NewEventBit();
26  void FreeEventBits(const uint32_t mask);
27
28  void ReplaceEventBits(const uint32_t bits);
29  uint32_t GetEventBits() const;
30  void SetEvents(const uint32_t mask);
31  void ResetEvents(const uint32_t mask);
32  // Wait for events to be set or reset. These functions take an optional
33  // timeout value. If timeout is NULL an infinite timeout will be used.
34  uint32_t
35  WaitForSetEvents(const uint32_t mask,
36                   const struct timespec *timeout_abstime = NULL) const;
37  uint32_t
38  WaitForEventsToReset(const uint32_t mask,
39                       const struct timespec *timeout_abstime = NULL) const;
40
41  uint32_t GetResetAckMask() const { return m_reset_ack_mask; }
42  uint32_t SetResetAckMask(uint32_t mask) { return m_reset_ack_mask = mask; }
43  uint32_t WaitForResetAck(const uint32_t mask,
44                           const struct timespec *timeout_abstime = NULL) const;
45
46protected:
47  // pthread condition and mutex variable to control access and allow
48  // blocking between the main thread and the spotlight index thread.
49  mutable PThreadMutex m_mutex;
50  mutable PThreadCondition m_set_condition;
51  mutable PThreadCondition m_reset_condition;
52  uint32_t m_bits;
53  uint32_t m_validBits;
54  uint32_t m_reset_ack_mask;
55
56private:
57  PThreadEvent(const PThreadEvent &) = delete;
58  PThreadEvent &operator=(const PThreadEvent &rhs) = delete;
59};
60
61#endif // LLDB_TOOLS_DEBUGSERVER_SOURCE_PTHREADEVENT_H
62