mirror of https://github.com/monero-project/monero
111 lines
3.5 KiB
C++
111 lines
3.5 KiB
C++
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Andrey N. Sabelnikov nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#pragma once
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#include <cstdint> // uint64_t
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#ifdef _WIN32
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#include <sysinfoapi.h> // GetSystemTimeAsFileTime
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#else
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#include <sys/time.h> // gettimeofday
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#endif
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namespace epee
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{
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namespace math_helper
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{
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template<typename get_interval, bool start_immediate = true>
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class once_a_time
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{
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uint64_t get_time() const
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{
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#ifdef _WIN32
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FILETIME fileTime;
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GetSystemTimeAsFileTime(&fileTime);
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unsigned __int64 present = 0;
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present |= fileTime.dwHighDateTime;
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present = present << 32;
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present |= fileTime.dwLowDateTime;
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present /= 10; // mic-sec
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return present;
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#else
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return tv.tv_sec * 1000000 + tv.tv_usec;
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#endif
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}
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void set_next_interval()
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{
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m_interval = get_interval()();
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}
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public:
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once_a_time()
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{
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m_last_worked_time = 0;
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if(!start_immediate)
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m_last_worked_time = get_time();
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set_next_interval();
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}
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void trigger()
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{
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m_last_worked_time = 0;
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}
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template<class functor_t>
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bool do_call(functor_t functr)
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{
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uint64_t current_time = get_time();
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if(current_time - m_last_worked_time > m_interval)
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{
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bool res = functr();
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m_last_worked_time = get_time();
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set_next_interval();
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return res;
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}
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return true;
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}
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private:
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uint64_t m_last_worked_time;
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uint64_t m_interval;
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};
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template<uint64_t N> struct get_constant_interval { public: uint64_t operator()() const { return N; } };
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template<int default_interval, bool start_immediate = true>
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class once_a_time_seconds: public once_a_time<get_constant_interval<default_interval * (uint64_t)1000000>, start_immediate> {};
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template<int default_interval, bool start_immediate = true>
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class once_a_time_milliseconds: public once_a_time<get_constant_interval<default_interval * (uint64_t)1000>, start_immediate> {};
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template<typename get_interval, bool start_immediate = true>
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class once_a_time_seconds_range: public once_a_time<get_interval, start_immediate> {};
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}
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}
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