169 lines
4.5 KiB
C++
169 lines
4.5 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 <limits>
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#include <boost/thread.hpp>
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#include <boost/utility/value_init.hpp>
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namespace epee
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{
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#define STD_TRY_BEGIN() try {
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#define STD_TRY_CATCH(where_, ret_val) \
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} \
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catch (const std::exception &e) \
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{ \
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LOG_ERROR("EXCEPTION: " << where_ << ", mes: "<< e.what()); \
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return ret_val; \
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} \
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catch (...) \
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{ \
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LOG_ERROR("EXCEPTION: " << where_ ); \
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return ret_val; \
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}
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#define AUTO_VAL_INIT(v) boost::value_initialized<decltype(v)>()
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namespace misc_utils
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{
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template<typename t_type>
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t_type get_max_t_val(t_type t)
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{
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return (std::numeric_limits<t_type>::max)();
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}
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template<typename t_iterator>
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t_iterator move_it_forward(t_iterator it, size_t count)
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{
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while(count--)
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it++;
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return it;
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}
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template<typename t_iterator>
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t_iterator move_it_backward(t_iterator it, size_t count)
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{
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while(count--)
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it--;
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return it;
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}
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// TEMPLATE STRUCT less
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template<class _Ty>
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struct less_as_pod
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: public std::binary_function<_Ty, _Ty, bool>
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{ // functor for operator<
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bool operator()(const _Ty& _Left, const _Ty& _Right) const
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{ // apply operator< to operands
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return memcmp(&_Left, &_Right, sizeof(_Left)) < 0;
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}
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};
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template<class _Ty>
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bool is_less_as_pod(const _Ty& _Left, const _Ty& _Right)
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{ // apply operator< to operands
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return memcmp(&_Left, &_Right, sizeof(_Left)) < 0;
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}
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inline
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bool sleep_no_w(long ms )
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{
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boost::this_thread::sleep(
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boost::get_system_time() +
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boost::posix_time::milliseconds( std::max<long>(ms,0) ) );
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return true;
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}
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template<class type_vec_type>
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type_vec_type median(std::vector<type_vec_type> &v)
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{
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if(v.empty())
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return boost::value_initialized<type_vec_type>();
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if(v.size() == 1)
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return v[0];
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size_t n = (v.size()) / 2;
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std::sort(v.begin(), v.end());
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//nth_element(v.begin(), v.begin()+n-1, v.end());
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if(v.size()%2)
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{//1, 3, 5...
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return v[n];
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}else
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{//2, 4, 6...
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return (v[n-1] + v[n])/2;
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}
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}
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/************************************************************************/
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/* */
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/************************************************************************/
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struct call_befor_die_base
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{
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virtual ~call_befor_die_base(){}
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};
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typedef boost::shared_ptr<call_befor_die_base> auto_scope_leave_caller;
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template<class t_scope_leave_handler>
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struct call_befor_die: public call_befor_die_base
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{
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t_scope_leave_handler m_func;
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call_befor_die(t_scope_leave_handler f):m_func(f)
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{}
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~call_befor_die()
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{
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try { m_func(); }
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catch (...) { /* ignore */ }
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}
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};
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template<class t_scope_leave_handler>
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auto_scope_leave_caller create_scope_leave_handler(t_scope_leave_handler f)
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{
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auto_scope_leave_caller slc(new call_befor_die<t_scope_leave_handler>(f));
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return slc;
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}
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template<typename T> struct struct_init: T
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{
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struct_init(): T{} {}
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};
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}
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}
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