[thread.lock.shared.locking] (original) (raw)

32 Concurrency support library [thread]

32.6 Mutual exclusion [thread.mutex]

32.6.5 Locks [thread.lock]

32.6.5.5 Class template shared_lock [thread.lock.shared]

32.6.5.5.3 Locking [thread.lock.shared.locking]

Effects: As if by pm->lock_shared().

Postconditions: owns == true.

Throws: Any exception thrown by pm->lock_shared().

Error conditions:

• operation_not_permitted — if pm is nullptr.
• resource_deadlock_would_occur — if on entry owns istrue.

Effects: As if by pm->try_lock_shared().

Postconditions: owns == res, where res is the value returned by the call to pm->try_lock_shared().

Returns: The value returned by the call to pm->try_lock_shared().

Throws: Any exception thrown by pm->try_lock_shared().

Error conditions:

• operation_not_permitted — if pm is nullptr.
• resource_deadlock_would_occur — if on entry owns istrue.

Effects: As if by pm->try_lock_shared_until(abs_time).

Postconditions: owns == res, where res is the value returned by the call to pm->try_lock_shared_until(abs_time).

Returns: The value returned by the call topm->try_lock_shared_until(abs_time).

Throws: Any exception thrown by pm->try_lock_shared_until(abs_time).

Error conditions:

• operation_not_permitted — if pm is nullptr.
• resource_deadlock_would_occur — if on entry owns istrue.

Effects: As if by pm->try_lock_shared_for(rel_time).

Postconditions: owns == res, where res is the value returned by the call to pm->try_lock_shared_for(rel_time).

Returns: The value returned by the call to pm->try_lock_shared_for(rel_time).

Throws: Any exception thrown by pm->try_lock_shared_for(rel_time).

Error conditions:

• operation_not_permitted — if pm is nullptr.
• resource_deadlock_would_occur — if on entry owns istrue.

Effects: As if by pm->unlock_shared().

Postconditions: owns == false.

Error conditions:

• operation_not_permitted — if on entry owns isfalse.