1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#pragma once
#include <cstdint> // uint64_t
#ifdef _WIN32
#include <sysinfoapi.h> // GetSystemTimeAsFileTime
#else
#include <sys/time.h> // gettimeofday
#endif
namespace epee
{
namespace math_helper
{
template<typename get_interval, bool start_immediate = true>
class once_a_time
{
uint64_t get_time() const
{
#ifdef _WIN32
FILETIME fileTime;
GetSystemTimeAsFileTime(&fileTime);
unsigned __int64 present = 0;
present |= fileTime.dwHighDateTime;
present = present << 32;
present |= fileTime.dwLowDateTime;
present /= 10; // mic-sec
return present;
#else
struct timeval tv;
gettimeofday(&tv, NULL);
return tv.tv_sec * 1000000 + tv.tv_usec;
#endif
}
void set_next_interval()
{
m_interval = get_interval()();
}
public:
once_a_time()
{
m_last_worked_time = 0;
if(!start_immediate)
m_last_worked_time = get_time();
set_next_interval();
}
void trigger()
{
m_last_worked_time = 0;
}
template<class functor_t>
bool do_call(functor_t functr)
{
uint64_t current_time = get_time();
if(current_time - m_last_worked_time > m_interval)
{
bool res = functr();
m_last_worked_time = get_time();
set_next_interval();
return res;
}
return true;
}
private:
uint64_t m_last_worked_time;
uint64_t m_interval;
};
template<uint64_t N> struct get_constant_interval { public: uint64_t operator()() const { return N; } };
template<int default_interval, bool start_immediate = true>
class once_a_time_seconds: public once_a_time<get_constant_interval<default_interval * (uint64_t)1000000>, start_immediate> {};
template<int default_interval, bool start_immediate = true>
class once_a_time_milliseconds: public once_a_time<get_constant_interval<default_interval * (uint64_t)1000>, start_immediate> {};
template<typename get_interval, bool start_immediate = true>
class once_a_time_seconds_range: public once_a_time<get_interval, start_immediate> {};
}
}
|
