NAME¶

std::scoped_lock::scoped_lock - std::scoped_lock::scoped_lock

Synopsis¶

explicit scoped_lock( MutexTypes&... m ); (1) (since C++17)
scoped_lock( std::adopt_lock_t, MutexTypes&... m ); (2) (since C++17)
scoped_lock( const scoped_lock& ) = delete; (3) (since C++17)

Acquires ownership of the given mutexes m.

1) If sizeof...(MutexTypes) == 0, does nothing. Otherwise, if sizeof...(MutexTypes)
== 1, effectively calls m.lock(). Otherwise, effectively calls std::lock(m...).
2) Acquires ownership of the mutexes m... without attempting to lock any of them.
The behavior is undefined unless the current thread holds a non-shared lock (i.e., a
lock acquired by lock, try_lock, try_lock_for, or try_lock_until) on each object in
m....
3) Copy constructor is deleted.

The behavior is undefined if m is destroyed before the scoped_lock object is.

Parameters¶

m - mutexes to acquire ownership of

Exceptions¶

1) Throws any exceptions thrown by m.lock().
2) Throws nothing.

Defect reports

The following behavior-changing defect reports were applied retroactively to
previously published C++ standards.

DR Applied to Behavior as published Correct behavior
P0739R0 C++17 adopt_lock_t parameter was last, impeding class moved to first
template argument deduction