Defined in header <mutex> | ||
|---|---|---|
class recursive_mutex; | (since C++11) |
The recursive_mutex class is a synchronization primitive that can be used to protect shared data from being simultaneously accessed by multiple threads.
recursive_mutex offers exclusive, recursive ownership semantics:
recursive_mutex for a period of time that starts when it successfully calls either lock or try_lock. During this period, the thread may make additional calls to lock or try_lock. The period of ownership ends when the thread makes a matching number of calls to unlock. recursive_mutex, all other threads will block (for calls to lock) or receive a false return value (for try_lock) if they attempt to claim ownership of the recursive_mutex. recursive_mutex may be locked is unspecified, but after that number is reached, calls to lock will throw std::system_error and calls to try_lock will return false. The behavior of a program is undefined if a recursive_mutex is destroyed while still owned by some thread. The recursive_mutex class satisfies all requirements of Mutex and StandardLayoutType.
| Member type | Definition |
|---|---|
native_handle_type(optional) | implementation-defined |
| constructs the mutex (public member function) |
|
| destroys the mutex (public member function) |
|
| operator=
[deleted] | not copy-assignable (public member function) |
Locking |
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| locks the mutex, blocks if the mutex is not available (public member function) |
|
| tries to lock the mutex, returns if the mutex is not available (public member function) |
|
| unlocks the mutex (public member function) |
|
Native handle |
|
| returns the underlying implementation-defined native handle object (public member function) |
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