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// -*- C++ -*- // // Copyright (C) 2009-2013 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING3. If not see // <http://www.gnu.org/licenses/>. /** @file profile/impl/profiler_hash_func.h * @brief Data structures to represent profiling traces. */ // Written by Lixia Liu and Silvius Rus. #ifndef _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H #define _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H 1 #include "profile/impl/profiler.h" #include "profile/impl/profiler_node.h" #include "profile/impl/profiler_trace.h" namespace __gnu_profile { /** @brief A hash performance instrumentation line in the object table. */ class __hashfunc_info : public __object_info_base { public: __hashfunc_info() : _M_longest_chain(0), _M_accesses(0), _M_hops(0) { } __hashfunc_info(const __hashfunc_info& __o) : __object_info_base(__o), _M_longest_chain(__o._M_longest_chain), _M_accesses(__o._M_accesses), _M_hops(__o._M_hops) { } __hashfunc_info(__stack_t __stack) : __object_info_base(__stack), _M_longest_chain(0), _M_accesses(0), _M_hops(0) { } virtual ~__hashfunc_info() { } void __merge(const __hashfunc_info& __o) { _M_longest_chain = std::max(_M_longest_chain, __o._M_longest_chain); _M_accesses += __o._M_accesses; _M_hops += __o._M_hops; } void __destruct(std::size_t __chain, std::size_t __accesses, std::size_t __hops) { _M_longest_chain = std::max(_M_longest_chain, __chain); _M_accesses += __accesses; _M_hops += __hops; } void __write(FILE* __f) const { std::fprintf(__f, "%Zu %Zu %Zu\n", _M_hops, _M_accesses, _M_longest_chain); } float __magnitude() const { return static_cast<float>(_M_hops); } std::string __advice() const { return "change hash function"; } private: std::size_t _M_longest_chain; std::size_t _M_accesses; std::size_t _M_hops; }; /** @brief A hash performance instrumentation line in the stack table. */ class __hashfunc_stack_info : public __hashfunc_info { public: __hashfunc_stack_info(const __hashfunc_info& __o) : __hashfunc_info(__o) { } }; /** @brief Hash performance instrumentation producer. */ class __trace_hash_func : public __trace_base<__hashfunc_info, __hashfunc_stack_info> { public: __trace_hash_func() : __trace_base<__hashfunc_info, __hashfunc_stack_info>() { __id = "hash-distr"; } ~__trace_hash_func() {} // Insert a new node at construct with object, callstack and initial size. void __insert(__object_t __obj, __stack_t __stack) { __add_object(__obj, __hashfunc_info(__stack)); } // Call at destruction/clean to set container final size. void __destruct(const void* __obj, std::size_t __chain, std::size_t __accesses, std::size_t __hops) { if (!__is_on()) return; // First find the item from the live objects and update the informations. __hashfunc_info* __objs = __get_object_info(__obj); if (!__objs) return; __objs->__destruct(__chain, __accesses, __hops); __retire_object(__obj); } }; inline void __trace_hash_func_init() { _GLIBCXX_PROFILE_DATA(_S_hash_func) = new __trace_hash_func(); } inline void __trace_hash_func_report(FILE* __f, __warning_vector_t& __warnings) { if (_GLIBCXX_PROFILE_DATA(_S_hash_func)) { _GLIBCXX_PROFILE_DATA(_S_hash_func)->__collect_warnings(__warnings); _GLIBCXX_PROFILE_DATA(_S_hash_func)->__write(__f); } } inline void __trace_hash_func_construct(const void* __obj) { if (!__profcxx_init()) return; _GLIBCXX_PROFILE_DATA(_S_hash_func)->__insert(__obj, __get_stack()); } inline void __trace_hash_func_destruct(const void* __obj, std::size_t __chain, std::size_t __accesses, std::size_t __hops) { if (!__profcxx_init()) return; _GLIBCXX_PROFILE_DATA(_S_hash_func)->__destruct(__obj, __chain, __accesses, __hops); } } // namespace __gnu_profile #endif /* _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H */
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