g ++ __thread =非平凡的构造函数 [英] g++ __thread = non-trivial constructor

问题描述

我想使用__thread修饰符作为g ++中C ++ 11的thread_local的替代。不幸的是，我的本地线程变量没有简单的构造函数（它必须设置一个整数组件的值）。
我想要使用这种构造：

  __ thread MyVariable * var; 
 
 __thread MyVariable * MyClass :: var = nullptr; 
  

每次我想要获取var的访问权限时，我都会检查它是否已分配：

  if（var == nullptr）
 var = new MyVariable（42）; 
  

但是我不知道，如何以这种方式自由分配内存。

解决方案

__ thread 存储说明符无法处理带有不平凡构造函数和析构函数的对象。 >

对于具有不平凡构造函数和析构函数的对象，您可能喜欢使用 boost :: thread_specfic_ptr<> 。当线程在相应的线程特定对象上终止 boost :: thread_specfic_ptr<> 调用 delete 。

I'd like to use __thread modifier, as a substitution for thread_local from C++11, in g++. Unfortunately my local thread variable doesn't have trivial constructor (it has to set the value of one integer components). I think about using this kind of construction:

__thread MyVariable *var;

__thread MyVariable* MyClass::var = nullptr;

End every time I'd like to get an acces to var I check if it was allocated:

if(var == nullptr)
   var = new MyVariable(42);

But I have no idea, how to free allocated in this way memory.

解决方案

__thread storage specifier can not handle objects with non-trivial constructors and destructors.

For objects with non-trivial constructors and destructors you may like to use boost::thread_specfic_ptr<>. When a thread terminates boost::thread_specfic_ptr<> invokes delete on the corresponding thread-specific object.

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