Showing content from https://cplusplus.com/TimedLockable below:
concept
TimedLockable
Timed lockable type
A timed lockable type is a Lockable type that supports try_lock_for and try_lock_until.
Types The standard library defines the following TimedLockable types:
Requirements A value m is of a TimedLockable type if the following expressions are well-formed:
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m.lock()
-
- Effects: Block until a lock can be acquired for the current execution agent. If an exception is thrown, then a lock shall not have been acquired for the current execution agent.
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m.unlock()
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- Requires: The current execution agent shall hold a lock on m.
- Effects: Releases a lock on m held by the current execution agent.
- Throws: Nothing.
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m.try_lock()
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- Effects: Attempts to acquire a lock for the current execution agent without blocking. If an exception is thrown, then a lock shall not have been acquired for the current execution agent.
- Return type:
bool
- Returns:
true if the lock was acquired, false otherwise.
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m.try_lock_for(rel_time)
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- Effects: Attempts to acquire a lock for the current execution agent within the relative timeout specified by rel_time. The function shall not return within the timeout specified by rel_time unless it has obtained a lock on m for the current execution agent. If an exception is thrown then a lock shall not have been acquired for the current execution agent.
- Return type:
bool
- Returns:
true if the lock was acquired, false otherwise.
-
m.try_lock_until(abs_time)
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- Effects: Attempts to acquire a lock for the current execution agent before the absolute timeout specified by abs_time. The function shall not return before the timeout specified by abs_time unless it has obtained a lock on m for the current execution agent. If an exception is thrown then a lock shall not have been acquired for the current execution agent.
- Return type:
bool
- Returns:
true if the lock was acquired, false otherwise.
Where:
value description m A TimedLockable type rel_time A value of an instantiation of duration abs_time A value of an instantiation of time_point
See also
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BasicLockable
-
Basic lockable type (concept)
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Lockable
-
Lockable type (mutex type) (concept)
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