C++

參考

<mutex>

物件
<mutex>

std::adopt_lock

constexpr adopt_lock_t adopt_lock {};
Adopt lock
Value used as possible argument to the constructor of unique_lock or lock_guard.

unique_lock objects constructed with adopt_lock do not lock the mutex object on construction, assuming instead that it is already locked by the current thread.

該值是一個編譯時常量，不攜帶任何狀態，僅用於區分建構函式簽名。

adopt_lock_t is an empty class.

另見

defer_lock
Defer lock (object)
try_to_lock
嘗試鎖定 (object)