1//===-- PThreadEvent.h ------------------------------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10//  Created by Greg Clayton on 6/16/07.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef __PThreadEvent_h__
15#define __PThreadEvent_h__
16#include "PThreadMutex.h"
17#include "PThreadCondition.h"
18#include <stdint.h>
19#include <time.h>
20
21class PThreadEvent
22{
23public:
24                PThreadEvent        (uint32_t bits = 0, uint32_t validBits = 0);
25                ~PThreadEvent       ();
26
27    uint32_t    NewEventBit         ();
28    void        FreeEventBits       (const uint32_t mask);
29
30    void        ReplaceEventBits    (const uint32_t bits);
31    uint32_t    GetEventBits        () const;
32    void        SetEvents           (const uint32_t mask);
33    void        ResetEvents         (const uint32_t mask);
34    // Wait for events to be set or reset. These functions take an optional
35    // timeout value. If timeout is NULL an infinite timeout will be used.
36    uint32_t    WaitForSetEvents    (const uint32_t mask, const struct timespec *timeout_abstime = NULL) const;
37    uint32_t    WaitForEventsToReset(const uint32_t mask, const struct timespec *timeout_abstime = NULL) const;
38
39    uint32_t    GetResetAckMask () const { return m_reset_ack_mask; }
40    uint32_t    SetResetAckMask (uint32_t mask) { return m_reset_ack_mask = mask; }
41    uint32_t    WaitForResetAck (const uint32_t mask, const struct timespec *timeout_abstime = NULL) const;
42protected:
43    //----------------------------------------------------------------------
44    // pthread condition and mutex variable to controll access and allow
45    // blocking between the main thread and the spotlight index thread.
46    //----------------------------------------------------------------------
47    mutable PThreadMutex        m_mutex;
48    mutable PThreadCondition    m_set_condition;
49    mutable PThreadCondition    m_reset_condition;
50    uint32_t            m_bits;
51    uint32_t            m_validBits;
52    uint32_t            m_reset_ack_mask;
53private:
54    PThreadEvent(const PThreadEvent&);  // Outlaw copy contructor
55    PThreadEvent& operator=(const PThreadEvent& rhs);
56
57};
58
59#endif // #ifndef __PThreadEvent_h__
60