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 
21 class PThreadEvent
22 {
23 public:
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 
GetResetAckMask()39     uint32_t    GetResetAckMask () const { return m_reset_ack_mask; }
SetResetAckMask(uint32_t 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;
42 protected:
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;
53 private:
54     PThreadEvent(const PThreadEvent&);  // Outlaw copy contructor
55     PThreadEvent& operator=(const PThreadEvent& rhs);
56 
57 };
58 
59 #endif // #ifndef __PThreadEvent_h__
60