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lock_guard Class

 

The latest version of this topic can be found at lock_guard Class.

Represents a template that can be instantiated to create an object whose destructor unlocks a mutex.

Syntax

template <class Mutex>
class lock_guard;

Remarks

The template argument Mutex must name a mutex type.

Members

Public Typedefs

Name Description
lock_guard::mutex_type Synonym for the template argument Mutex.

Public Constructors

Name Description
lock_guard::lock_guard Constructor Constructs a lock_guard object.
lock_guard::~lock_guard Destructor Unlocks the mutex that was passed to the constructor.

Requirements

Header: mutex

Namespace: std

lock_guard::lock_guard Constructor

Constructs a lock_guard object.

explicit lock_guard(mutex_type& Mtx);

lock_guard(mutex_type& Mtx, adopt_lock_t);

Parameters

Mtx
A mutex type object.

Remarks

The first constructor constructs an object of type lock_guard and locks Mtx. If Mtx is not a recursive mutex, it must be unlocked when this constructor is called.

The second constructor does not lock Mtx. Mtx must be locked when this constructor is called. The constructor throws no exceptions.

lock_guard::~lock_guard Destructor

Unlocks the mutex that was passed to the constructor.

~lock_guard() noexcept;

Remarks

If the mutex does not exist when the destructor runs, the behavior is undefined.

See Also

Header Files Reference
<mutex>