/boost/lockfree/queue.hpp：错误：静态断言失败：（的boost :: has_​​trivial_destructor＆LT; T＆GT; ::值） [英] /boost/lockfree/queue.hpp: error: static assertion failed: (boost::has_trivial_destructor<T>::value)

问题描述

我想在这个文件替换的boost :: lockfree ::队列为的std ::队列 <一href=\"https://github.com/zaphoyd/websocketpp/blob/experimental/examples/broadcast_server/broadcast_server.cpp\" rel=\"nofollow\">https://github.com/zaphoyd/websocketpp/blob/experimental/examples/broadcast_server/broadcast_server.cpp

我已经添加了的#include＆LT;升压/ lockfree / queue.hpp＆GT; ;更改后的行 130 ，的std ::队列＆LT;作用＆gt; m_actions; ，到的boost :: lockfree ::队列＆LT;作用＆gt; m_actions; ;除去具有锁定做的所有行;并且更改后的行 103 ， m_actions.pop（）; ，到 m_actions.pop（一）;

我得到这些错误，当我 scons的broadcast_server_lockfree 在项目的根后添加 broadcast_server_lockfree = SConscript（'＃/ broadcast_server_lockfree / SConscript'，variant_dir = builddir +'broadcast_server_lockfree'，重复= 0）来项目的根的 SConstruct ，并使用 broadcast_server 的 SConstruct 在 broadcast_server_lockfree 目录：

 根@服务器：〜/ websocketpp-实验＃scons的broadcast_server_lockfree
scons的：读SConscript文件...
C ++ 11的构建环境部分启用
scons的：读完SConscript文件。
scons的：建筑的目标...
scons的：建筑相关VariantDir目标：构建/发布/ broadcast_server_lockfree
G ++ -o建立/释放/​​ broadcast_server_lockfree / broadcast_server_lockfree.o -c -std =的C ++ 0x -Wall -Wcast对齐-isystem /根/ boost_1_53_0 -DNDEBUG -D_WEBSOCKETPP_CPP11_MEMORY_ -D_WEBSOCKETPP_CPP11_FUNCTIONAL_ -D_WEBSOCKETPP_CPP11_SYSTEM_ERROR_ -D_WEBSOCKETPP_CPP11_RANDOM_DEVICE_ -D_WEBSOCKETPP_NOEXCEPT_ -I。 broadcast_server_lockfree / broadcast_server_lockfree.cpp
10：0文件从broadcast_server_lockfree / broadcast_server_lockfree.cpp包括：
/root/boost_1_53_0/boost/lockfree/queue.hpp：在实例类boost :: lockfree ::队列＆lt;作用＆GT;'：
broadcast_server_lockfree / broadcast_server_lockfree.cpp：139：36：从这里需要
/root/boost_1_53_0/boost/lockfree/queue.hpp:79:5：错误：静态断言失败：（的boost :: has_​​trivial_destructor＆LT; T＆GT; ::值）
/root/boost_1_53_0/boost/lockfree/queue.hpp:83:5：错误：静态断言失败：（的boost :: has_​​trivial_assign＆LT; T＆GT; ::值）
broadcast_server_lockfree / broadcast_server_lockfree.cpp：在成员函数'无效broadcast_server :: process_messages（）：
broadcast_server_lockfree / broadcast_server_lockfree.cpp：111：34：错误：'类boost :: lockfree ::队列＆lt;作用＆GT;'没有成员名为'前'
broadcast_server_lockfree / broadcast_server_lockfree.cpp：117：55：错误：'m_connection_lock在此范围未声明
broadcast_server_lockfree / broadcast_server_lockfree.cpp：120：55：错误：'m_connection_lock在此范围未声明
broadcast_server_lockfree / broadcast_server_lockfree.cpp：123：55：错误：'m_connection_lock在此范围未声明
10：0文件从broadcast_server_lockfree / broadcast_server_lockfree.cpp包括：
/root/boost_1_53_0/boost/lockfree/queue.hpp：在提振:: lockfree ::队列＆LT的实例; T，A0，A1，A2＆GT; ::〜队列（）与T =动作; A0 =的boost ::参数:: void_; A1 =的boost ::参数:: void_; A2 =的boost ::参数:: void_]：
broadcast_server_lockfree / broadcast_server_lockfree.cpp：41：24：从这里需要
/root/boost_1_53_0/boost/lockfree/queue.hpp:229:11：错误：调用没有匹配的函数行动::行动（）
/root/boost_1_53_0/boost/lockfree/queue.hpp:229:11：注意：考生：
broadcast_server_lockfree / broadcast_server_lockfree.cpp：32：5：注意：动作::动作（ACTION_TYPE，websocketpp ::端点＆LT; websocketpp ::连接＆LT; websocketpp ::配置:: ASIO＆gt;中websocketpp ::配置:: ASIO＆GT; :: message_ptr）
broadcast_server_lockfree / broadcast_server_lockfree.cpp：32：5：注意：考生预计2个参数，提供0
broadcast_server_lockfree / broadcast_server_lockfree.cpp：31：5：注意：动作::动作（ACTION_TYPE，websocketpp :: connection_hdl）
broadcast_server_lockfree / broadcast_server_lockfree.cpp：31：5：注意：考生预计2个参数，提供0
broadcast_server_lockfree / broadcast_server_lockfree.cpp：30：8：注意：动作::动作（const的行动和放大器;）
broadcast_server_lockfree / broadcast_server_lockfree.cpp：30：8：注意：考生预计1参数，提供0
10：0文件从broadcast_server_lockfree / broadcast_server_lockfree.cpp包括：
/root/boost_1_53_0/boost/lockfree/queue.hpp：在实例化的boost :: lockfree ::队列＆LT; T，A0，A1，A2＆GT; ::节点::节点（升压:: lockfree ::队列＆LT; T， A0，A1，A2＆GT; ::节点:: handle_type）与T =动作; A0 =的boost ::参数:: void_; A1 =的boost ::参数:: void_; A2 =的boost ::参数:: void_;提高:: lockfree ::队列＆LT; T，A0，A1，A2＆GT; ::节点:: handle_type =提振:: lockfree ::队列＆LT;作用＆gt; ::节点*]：
/root/boost_1_53_0/boost/lockfree/detail/freelist.hpp:82:13：从'要求T *的boost :: lockfree ::详细:: freelist_stack LT＆; T，和的Alloc GT; ::结构（常量ArgumentType＆安培;）与布尔ThreadSafe的= TRUE;布尔界= FALSE; ArgumentType =提振:: lockfree ::队列＆LT;作用＆gt; ::节点。*; T =的boost :: lockfree ::队列＆LT;作用＆gt; ::节点; ALLOC =的std ::分配器＆LT;提高:: lockfree ::队列＆LT;作用＆gt; ::节点＆GT;]
/root/boost_1_53_0/boost/lockfree/queue.hpp:126:75：从'无效升压所需:: lockfree ::队列＆LT; T，A0，A1，A2＆GT; ::初始化（）与T =动作; A0 =的boost ::参数:: void_; A1 =的boost ::参数:: void_; A2 =的boost ::参数:: void_]'
/root/boost_1_53_0/boost/lockfree/queue.hpp:166:9：从'升压所需:: lockfree ::队列＆LT; T，A0，A1，A2＆GT; ::队列（）与T =动作; A0 =的boost ::参数:: void_; A1 =的boost ::参数:: void_; A2 =的boost ::参数:: void_]'
broadcast_server_lockfree / broadcast_server_lockfree.cpp：41：24：从这里需要
/root/boost_1_53_0/boost/lockfree/queue.hpp:109:52：错误：调用没有匹配的函数行动::行动（）
/root/boost_1_53_0/boost/lockfree/queue.hpp:109:52：注意：考生：
broadcast_server_lockfree / broadcast_server_lockfree.cpp：32：5：注意：动作::动作（ACTION_TYPE，websocketpp ::端点＆LT; websocketpp ::连接＆LT; websocketpp ::配置:: ASIO＆gt;中websocketpp ::配置:: ASIO＆GT; :: message_ptr）
broadcast_server_lockfree / broadcast_server_lockfree.cpp：32：5：注意：考生预计2个参数，提供0
broadcast_server_lockfree / broadcast_server_lockfree.cpp：31：5：注意：动作::动作（ACTION_TYPE，websocketpp :: connection_hdl）
broadcast_server_lockfree / broadcast_server_lockfree.cpp：31：5：注意：考生预计2个参数，提供0
broadcast_server_lockfree / broadcast_server_lockfree.cpp：30：8：注意：动作::动作（const的行动和放大器;）
broadcast_server_lockfree / broadcast_server_lockfree.cpp：30：8：注意：考生预计1参数，提供0
scons的：*** [建立/释放/​​ broadcast_server_lockfree / broadcast_server_lockfree.o]错误1
scons的：建筑终止，因为错误的。
 

我知道旁边没有关​​于C ++和对错误的搜索已经产生了什么（因为我不知道我在读什么）。

这里的的boost :: lockfree ::队列例如，如果它帮助。 http://boost-sandbox.sourceforge.net/doc/html/lockfree /examples.html

请告诉我如何纠正这一点。

动作

 结构动作{
    行动（ACTION_TYPE T，connection_hdl H）：类型（T），高密度脂蛋白（H）{}
    行动（ACTION_TYPE T，服务器:: message_ptr M）：类型（T），味精（M）{}    ACTION_TYPE类型;
    websocketpp :: connection_hdl HDL;
    服务器:: message_ptr味精;
};
 

解决方案

从文档：

的 T必须有一个拷贝构造函数，一个微不足道的赋值运算符和析构函数琐碎的

因此​​，你的动作类必须如下所示：

 集体诉讼
{
上市：
    行动（const的行动和放大器; RHS）{...}
    //隐式定义的析构函数自身和所有成员变量
    //隐式定义的操作符=自身和所有成员变量};
 

的 static_assert s的抱怨，因为你的析构函数和运算符= 都不会隐编译器定义（或本是的行动至少有一个成员变量的情况下）。

编辑：我有一个快速浏览一下回购 - 我似乎无法找到 connection_hdl ，并没有 message_ptr 在模板＆LT; typename的终点＆GT;级服务器。无论哪种方式， websocketpp之一:: connection_hdl HDL 或服务器:: message_ptr味精不满足上述条件。只是掉入一lockfree队列，而不是使用的std ::队列可能是一个不平凡的任务，这将需要一些改动。

I'm trying to substitute boost::lockfree::queue for std::queue in this file https://github.com/zaphoyd/websocketpp/blob/experimental/examples/broadcast_server/broadcast_server.cpp

I've added #include <boost/lockfree/queue.hpp>; changed line 130, std::queue<action> m_actions;, to boost::lockfree::queue<action> m_actions;; removed all lines having to do with locking; and changed line 103, m_actions.pop();, to m_actions.pop(a);.

I get these errors when I scons broadcast_server_lockfree in the project root after adding broadcast_server_lockfree = SConscript('#/broadcast_server_lockfree/SConscript',variant_dir = builddir + 'broadcast_server_lockfree',duplicate = 0) to the project root's SConstruct and using broadcast_server's SConstruct in the broadcast_server_lockfree directory:

root@server:~/websocketpp-experimental# scons broadcast_server_lockfree
scons: Reading SConscript files ...
C++11 build environment partially enabled
scons: done reading SConscript files.
scons: Building targets ...
scons: building associated VariantDir targets: build/release/broadcast_server_lockfree
g++ -o build/release/broadcast_server_lockfree/broadcast_server_lockfree.o -c -std=c++0x -Wall -Wcast-align -isystem /root/boost_1_53_0 -DNDEBUG -D_WEBSOCKETPP_CPP11_MEMORY_ -D_WEBSOCKETPP_CPP11_FUNCTIONAL_ -D_WEBSOCKETPP_CPP11_SYSTEM_ERROR_ -D_WEBSOCKETPP_CPP11_RANDOM_DEVICE_ -D_WEBSOCKETPP_NOEXCEPT_ -I. broadcast_server_lockfree/broadcast_server_lockfree.cpp
In file included from broadcast_server_lockfree/broadcast_server_lockfree.cpp:10:0:
/root/boost_1_53_0/boost/lockfree/queue.hpp: In instantiation of 'class boost::lockfree::queue<action>':
broadcast_server_lockfree/broadcast_server_lockfree.cpp:139:36:   required from here
/root/boost_1_53_0/boost/lockfree/queue.hpp:79:5: error: static assertion failed: (boost::has_trivial_destructor<T>::value)
/root/boost_1_53_0/boost/lockfree/queue.hpp:83:5: error: static assertion failed: (boost::has_trivial_assign<T>::value)
broadcast_server_lockfree/broadcast_server_lockfree.cpp: In member function 'void broadcast_server::process_messages()':
broadcast_server_lockfree/broadcast_server_lockfree.cpp:111:34: error: 'class boost::lockfree::queue<action>' has no member named 'front'
broadcast_server_lockfree/broadcast_server_lockfree.cpp:117:55: error: 'm_connection_lock' was not declared in this scope
broadcast_server_lockfree/broadcast_server_lockfree.cpp:120:55: error: 'm_connection_lock' was not declared in this scope
broadcast_server_lockfree/broadcast_server_lockfree.cpp:123:55: error: 'm_connection_lock' was not declared in this scope
In file included from broadcast_server_lockfree/broadcast_server_lockfree.cpp:10:0:
/root/boost_1_53_0/boost/lockfree/queue.hpp: In instantiation of 'boost::lockfree::queue<T, A0, A1, A2>::~queue() [with T = action; A0 = boost::parameter::void_; A1 = boost::parameter::void_; A2 = boost::parameter::void_]':
broadcast_server_lockfree/broadcast_server_lockfree.cpp:41:24:   required from here
/root/boost_1_53_0/boost/lockfree/queue.hpp:229:11: error: no matching function for call to 'action::action()'
/root/boost_1_53_0/boost/lockfree/queue.hpp:229:11: note: candidates are:
broadcast_server_lockfree/broadcast_server_lockfree.cpp:32:5: note: action::action(action_type, websocketpp::endpoint<websocketpp::connection<websocketpp::config::asio>, websocketpp::config::asio>::message_ptr)
broadcast_server_lockfree/broadcast_server_lockfree.cpp:32:5: note:   candidate expects 2 arguments, 0 provided
broadcast_server_lockfree/broadcast_server_lockfree.cpp:31:5: note: action::action(action_type, websocketpp::connection_hdl)
broadcast_server_lockfree/broadcast_server_lockfree.cpp:31:5: note:   candidate expects 2 arguments, 0 provided
broadcast_server_lockfree/broadcast_server_lockfree.cpp:30:8: note: action::action(const action&)
broadcast_server_lockfree/broadcast_server_lockfree.cpp:30:8: note:   candidate expects 1 argument, 0 provided
In file included from broadcast_server_lockfree/broadcast_server_lockfree.cpp:10:0:
/root/boost_1_53_0/boost/lockfree/queue.hpp: In instantiation of 'boost::lockfree::queue<T, A0, A1, A2>::node::node(boost::lockfree::queue<T, A0, A1, A2>::node::handle_type) [with T = action; A0 = boost::parameter::void_; A1 = boost::parameter::void_; A2 = boost::parameter::void_; boost::lockfree::queue<T, A0, A1, A2>::node::handle_type = boost::lockfree::queue<action>::node*]':
/root/boost_1_53_0/boost/lockfree/detail/freelist.hpp:82:13:   required from 'T* boost::lockfree::detail::freelist_stack<T, Alloc>::construct(const ArgumentType&) [with bool ThreadSafe = true; bool Bounded = false; ArgumentType = boost::lockfree::queue<action>::node*; T = boost::lockfree::queue<action>::node; Alloc = std::allocator<boost::lockfree::queue<action>::node>]'
/root/boost_1_53_0/boost/lockfree/queue.hpp:126:75:   required from 'void boost::lockfree::queue<T, A0, A1, A2>::initialize() [with T = action; A0 = boost::parameter::void_; A1 = boost::parameter::void_; A2 = boost::parameter::void_]'
/root/boost_1_53_0/boost/lockfree/queue.hpp:166:9:   required from 'boost::lockfree::queue<T, A0, A1, A2>::queue() [with T = action; A0 = boost::parameter::void_; A1 = boost::parameter::void_; A2 = boost::parameter::void_]'
broadcast_server_lockfree/broadcast_server_lockfree.cpp:41:24:   required from here
/root/boost_1_53_0/boost/lockfree/queue.hpp:109:52: error: no matching function for call to 'action::action()'
/root/boost_1_53_0/boost/lockfree/queue.hpp:109:52: note: candidates are:
broadcast_server_lockfree/broadcast_server_lockfree.cpp:32:5: note: action::action(action_type, websocketpp::endpoint<websocketpp::connection<websocketpp::config::asio>, websocketpp::config::asio>::message_ptr)
broadcast_server_lockfree/broadcast_server_lockfree.cpp:32:5: note:   candidate expects 2 arguments, 0 provided
broadcast_server_lockfree/broadcast_server_lockfree.cpp:31:5: note: action::action(action_type, websocketpp::connection_hdl)
broadcast_server_lockfree/broadcast_server_lockfree.cpp:31:5: note:   candidate expects 2 arguments, 0 provided
broadcast_server_lockfree/broadcast_server_lockfree.cpp:30:8: note: action::action(const action&)
broadcast_server_lockfree/broadcast_server_lockfree.cpp:30:8: note:   candidate expects 1 argument, 0 provided
scons: *** [build/release/broadcast_server_lockfree/broadcast_server_lockfree.o] Error 1
scons: building terminated because of errors.

I know next to nothing about c++, and searches on the error have yielded nothing (since I have no idea what I'm reading).

Here's the boost::lockfree::queue example if it helps. http://boost-sandbox.sourceforge.net/doc/html/lockfree/examples.html

Please show me how to correct this.

action

struct action {
    action(action_type t, connection_hdl h) : type(t), hdl(h) {}
    action(action_type t, server::message_ptr m) : type(t), msg(m) {}

    action_type type;
    websocketpp::connection_hdl hdl;
    server::message_ptr msg;
};

解决方案

From the docs:

T must have a copy constructor, a trivial assignment operator, and a trivial destructor.

Thus your action class must look like the following:

class action
{
public:
    action(const action& rhs) { ... }
    //Implicitly defined destructor for itself and all member variables
    //Implicitly defined operator= for itself and all member variables

};

The static_asserts are complaining because your destructor and operator= are not implicitly defined by the compiler (or this is the case for at least one member variable of action).

Edit: I've had a quick look at the repo - I can't seem to find connection_hdl, and there is no message_ptr in template <typename endpoint> class server. Either way, one of websocketpp::connection_hdl hdl or server::message_ptr msg does not satisfy the above conditions. Just "dropping in" a lockfree queue instead of using a std::queue is likely a non-trivial task which will require a number of changes.

这篇关于/boost/lockfree/queue.hpp：错误：静态断言失败：（的boost :: has_​​trivial_destructor＆LT; T＆GT; ::值）的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！