Padded slot for Sync_bounded_queue, aligning the struct to cache line size to minimize false sharing in concurrent access. More...

#include <padded_slot.h>

Public Attributes
T	element {}
	The stored element in the queue slot. More...

bool	validity {false}
	Validity flag: true if the slot contains an element ready for consumption, false if empty. More...

Mutex_tp	validity_mt
	Mutex protecting access to the element and flags. More...

Cv_tp	producer_cv
	Condition variable for producers waiting for the slot to become free (full queue). More...

Cv_tp	consumer_cv
	Condition variable for consumers waiting for the slot to be filled (empty queue). More...

Detailed Description

template<typename T, typename Mutex_tp, typename Cv_tp, size_t cache_line_size_tp = hardware_destructive_interference_size>
struct mysql::concurrency::detail::Padded_slot< T, Mutex_tp, Cv_tp, cache_line_size_tp >

Padded slot for Sync_bounded_queue, aligning the struct to cache line size to minimize false sharing in concurrent access.

Holds an element, validity flag, mutex, and condition variables for producer-consumer synchronization. Each slot is padded to prevent adjacent slots from sharing cache lines, reducing contention in multi-threaded environments.

Template Parameters

T	Element type.
Mutex_tp	Mutex type
Cv_tp	Condition variable type
cache_line_size_tp	Padding size (default: hardware_destructive_interference_size).

See also: Sync_bounded_queue