std::lock_guard::lock_guard

 

C++

Language

Standard library headers

Concepts

Utilities library

Strings library

Containers library

Algorithms library

Iterators library

Numerics library

Input/output library

Localizations library

Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

 

Thread support library

Threads
thread (C++11)
this_thread namespace
get_id (C++11) yield (C++11)	sleep_for (C++11) sleep_until (C++11)
Mutual exclusion
mutex (C++11) timed_mutex (C++11) shared_timed_mutex (C++14)	recursive_mutex (C++11) recursive_timed_mutex (C++11)
Generic lock management
lock_guard (C++11) unique_lock (C++11) shared_lock (C++14) defer_lock_ttry_to_lock_tadopt_lock_t (C++11)(C++11)(C++11)	lock (C++11) try_lock (C++11) defer_locktry_to_lockadopt_lock (C++11)(C++11)(C++11) once_flag (C++11) call_once (C++11)
Condition variables
condition_variable (C++11)
condition_variable_any (C++11)
notify_all_at_thread_exit (C++11)
cv_status (C++11)
Futures
promise (C++11) future (C++11) shared_future (C++11) packaged_task (C++11) async (C++11)	launch (C++11) future_status (C++11) future_error (C++11) future_category (C++11) future_errc (C++11)

 

std::lock_guard

Member functions

lock_guard::lock_guard

lock_guard::~lock_guard

 

explicit lock_guard( mutex_type& m );	(1)	(since C++11)
lock_guard( mutex_type& m, std::adopt_lock_t t );	(2)	(since C++11)
lock_guard( const lock_guard& ) = delete;	(3)	(since C++11)

Acquires ownership of the given mutex m.

1) If m is not a recursive mutex, requires that the current thread does not own m. Effectively calls m.lock().

2) Requires that the current thread owns m.

3) Copy constructor is deleted.

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

Parameters

m	-	mutex to acquire ownership of
t	-	tag parameter used to select non-locking version of the constructor