# C++ concepts: TimedLockable

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< cpp‎ | concept

The `TimedLockable` concept describes the characteristics of types that provide timed exclusive blocking semantics for execution agents (i.e. threads).

### Requirements

For type `L` to be `TimedLockable`, the following conditions have to be satisfied for an object `m` of type `L`:

Expression | Requires | Effects
--- | --- | ---
m.try_lock_for(duration) |  | Blocks for the provided duration the resource `m`.
m.try_lock_until(time_limit) |  | Blocks the resource `m` until the provided time limit point is reached.

### See also

- Thread support library
- `TimedMutex`
- `Lockable`
- `BasicLockable`

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