| Qore Programming Language - C/C++ Library 1.0.8

QoreCounter.h
1 /* -*- mode: c++; indent-tabs-mode: nil -*- */
2 /*
3 QoreCounter.h
4
5 Qore Programming Language
6
7 Copyright (C) 2005 - 2017 Qore Technologies, s.r.o.
8
9 Permission is hereby granted, free of charge, to any person obtaining a
10 copy of this software and associated documentation files (the "Software"),
11 to deal in the Software without restriction, including without limitation
12 the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 and/or sell copies of the Software, and to permit persons to whom the
14 Software is furnished to do so, subject to the following conditions:
15
16 The above copyright notice and this permission notice shall be included in
17 all copies or substantial portions of the Software.
18
19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
24 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
25 DEALINGS IN THE SOFTWARE.
26
27 Note that the Qore library is released under a choice of three open-source
28 licenses: MIT (as above), LGPL 2+, or GPL 2+; see README-LICENSE for more
29 information.
30 */
31
32 #ifndef _QORE_QORECOUNTER_H
33
34 #define _QORE_QORECOUNTER_H
35
36 #include <qore/Qore.h>
37 #include <qore/QoreCondition.h>
38
40 class QoreCounter {
41 private:
43 struct qore_counter_private* priv;
44
46 DLLLOCAL QoreCounter(const QoreCounter&);
47
49 DLLLOCAL QoreCounter& operator=(const QoreCounter&);
50
51 public:
53 DLLEXPORT QoreCounter(int nc = 0);
54
56 DLLEXPORT ~QoreCounter();
57
59 DLLEXPORT void destructor(ExceptionSink* xsink);
60
62
66 DLLEXPORT int inc();
67
69
77 DLLEXPORT int dec(ExceptionSink* xsink);
78
80
87 DLLEXPORT int waitForZero(ExceptionSink* xsink, int timeout_ms = 0);
88
90 DLLEXPORT int getCount() const;
91
93 DLLEXPORT int getWaiting() const;
94
95 // internal use only - for internal counters
96 DLLLOCAL void waitForZero();
97 DLLLOCAL void dec();
98 };
99
100 #endif
QoreCounter
a simple thread-safe counter object; objects can block on it until the counter reaches zero ...
Definition: QoreCounter.h:40
QoreCounter::~QoreCounter
DLLEXPORT ~QoreCounter()
destroys the object and frees all memory
QoreCounter::dec
DLLEXPORT int dec(ExceptionSink *xsink)
decrements the counter and wakes up any threads if the counter reaches 0
QoreCounter::getCount
DLLEXPORT int getCount() const
returns the current count
ExceptionSink
container for holding Qore-language exception information and also for registering a "thread_exit" ca...
Definition: ExceptionSink.h:48
Qore.h
QoreCounter::inc
DLLEXPORT int inc()
increments the counter
QoreCounter::destructor
DLLEXPORT void destructor(ExceptionSink *xsink)
throws a Qore-language exception if there are any waiting threads and wakes them all up ...
QoreCounter::waitForZero
DLLEXPORT int waitForZero(ExceptionSink *xsink, int timeout_ms=0)
blocks the calling thread until the counter reaches 0
QoreCounter::getWaiting
DLLEXPORT int getWaiting() const
returns the number of threads blocked on this object