Lock striping concurrent access policy. More...

#include <cds/intrusive/striped_set/striping_policy.h>

Public Types
typedef Lock	lock_type
	lock type

typedef Alloc	allocator_type
	allocator type

typedef cds::sync::lock_array< lock_type, cds::sync::pow2_select_policy, allocator_type >	lock_array_type
	lock array type

Public Member Functions
	striping (size_t nLockCount)
	Constructor. More...

size_t	lock_count () const
	Returns lock array size. More...

Detailed Description

template<class Lock = std::mutex, class Alloc = CDS_DEFAULT_ALLOCATOR>
class cds::intrusive::striped_set::striping< Lock, Alloc >

Lock striping concurrent access policy.

This is one of available opt::mutex_policy option type for StripedSet

Lock striping is very simple technique. The set consists of the bucket table and the array of locks. Initially, the capacity of lock array and bucket table is the same. When set is resized, bucket table capacity will be doubled but lock array will not. The lock i protects each bucket j, where j = i mod L , where L - the size of lock array.

The policy contains an internal array of Lock locks.

Template arguments:

Lock - the type of mutex. The default is std::mutex. The mutex type should be default-constructible. Note that a spin-lock is not so good suitable for lock striping for performance reason.
Alloc - allocator type used for lock array memory allocation. Default is CDS_DEFAULT_ALLOCATOR.

Constructor & Destructor Documentation

◆ striping()

template<class Lock = std::mutex, class Alloc = CDS_DEFAULT_ALLOCATOR>

cds::intrusive::striped_set::striping< Lock, Alloc >::striping ( size_t nLockCount )

inline

Constructor.

Parameters

nLockCount The size of lock array. Must be power of two.

Member Function Documentation

◆ lock_count()

template<class Lock = std::mutex, class Alloc = CDS_DEFAULT_ALLOCATOR>

size_t cds::intrusive::striped_set::striping< Lock, Alloc >::lock_count ( ) const

inline

Returns lock array size.

Lock array size is unchanged during striped object lifetime

The documentation for this class was generated from the following file:

cds/intrusive/striped_set/striping_policy.h

Public Types