1. thread類主要方法

不支持 CopyConstructible or CopyAssignable,
支持 MoveConstructible and MoveAssignable.

• 構(gòu)造函數(shù)
  默認(rèn)構(gòu)造函數(shù)：構(gòu)造一個(gè)任何線程不執(zhí)行的線程對象。
  thread() noexcept;

初始化函數(shù)：
template <class Fn, class… Args> explicit thread (Fn&& fn, Args&&… args);

拷貝構(gòu)造函數(shù)是被禁用的：thread (const thread&) = delete;

• join MainThread 被阻塞，直到child thread 線程執(zhí)行完畢。

• joinable 是否是join

• detach 分離線程對象

• get_id 獲取線程 ID，返回一個(gè)類型為 std::thread::id 的對象。

• swap 交換兩個(gè)線程對象所代表的底層句柄(underlying handles)。

• native_handle

• hardware_concurrency [static]

• 析構(gòu) ~thread()
  {
  if (joinable())
  std::terminate();
  }

• operator=

1.1

class thread{public:thread() noexcept = default;template<typename _Callable, typename... _Args,typename = _Require<__not_same<_Callable>>>explicitthread(_Callable&& __f, _Args&&... __args){static_assert( __is_invocable<typename decay<_Callable>::type,typename decay<_Args>::type...>::value,"std::thread arguments must be invocable after conversion to rvalues");~thread(){if (joinable())std::terminate();}thread(const thread&) = delete;thread(thread&& __t) noexcept{ swap(__t); }thread& operator=(const thread&) = delete;thread& operator=(thread&& __t) noexcept{if (joinable())std::terminate();swap(__t);return *this;}voidswap(thread& __t) noexcept{ std::swap(_M_id, __t._M_id); }booljoinable() const noexcept{ return !(_M_id == id()); }voidjoin();voiddetach();thread::idget_id() const noexcept{ return _M_id; }// Returns a value that hints at the number of hardware thread contexts.static unsigned inthardware_concurrency() noexcept; ... }inline void thread::join() {if (this_thread::get_id() == get_id())boost::throw_exception(thread_resource_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost thread: trying joining itself"));BOOST_THREAD_VERIFY_PRECONDITION( join_noexcept(),thread_resource_error(static_cast<int>(system::errc::invalid_argument), "boost thread: thread not joinable"));}

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