C++ named requirements: Lockable (since C++11)
From cppreference.net
C++
C++ named requirements
|
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
The Lockable requirements extends the BasicLockable requirements to include attempted locking.
Contents |
Requirements
For type
L
to be
Lockable
, it must meet the above condition as well as the following:
| Expression | Effects | Return value |
|---|---|---|
| m. try_lock ( ) | Attempts to acquire the lock for the current execution agent (thread, process, task) without blocking. If an exception is thrown, no lock is obtained. | true if the lock was acquired, false otherwise |
Notes
The
try_lock
member functions obtains a non-shared lock on
m
on success.
Standard library
The following standard library types satisfy Lockable requirements:
|
(C++11)
|
provides basic mutual exclusion facility
(class) |
|
(C++11)
|
provides mutual exclusion facility which can be locked recursively by the same thread
(class) |
|
(C++11)
|
provides mutual exclusion facility which can be locked recursively
by the same thread and implements locking with a timeout (class) |
|
(C++17)
|
provides shared mutual exclusion facility
(class) |
|
(C++14)
|
provides shared mutual exclusion facility and implements locking with a timeout
(class) |
|
(C++11)
|
provides mutual exclusion facility which implements locking with a timeout
(class) |