std::defer_lock_t, std::try_to_lock_t, std::adopt_lock_t

 

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struct defer_lock_t { };		(since C++11)
struct try_to_lock_t { };		(since C++11)
struct adopt_lock_t { };		(since C++11)

std::defer_lock_t, std::try_to_lock_t and std::adopt_lock_t are empty struct tag types used to specify locking strategy.

Type	Effect(s)
defer_lock_t	do not acquire ownership of the mutex
try_to_t	try to acquire ownership of the mutex without blocking
adopt_lock_t	assume the calling thread already has ownership of the mutex

See also

defer_lock try_to_lock adopt_lock	tag constants used to specify locking strategy (constant)