tbb::interface4::concurrent_hash_map< Key, T, HashCompare, Allocator >::bucket_accessor Class Reference

bucket accessor is to find, rehash, acquire a lock, and access a bucket

#include <concurrent_hash_map.h>

Inheritance diagram for tbb::interface4::concurrent_hash_map< Key, T, HashCompare, Allocator >::bucket_accessor:

List of all members.

Public Member Functions
void	acquire (concurrent_hash_map *base, const hashcode_t h, bool writer=false)
	find a bucket by masked hashcode, optionally rehash, and acquire the lock
	bucket_accessor (concurrent_hash_map *base, const hashcode_t h, bool writer=false)
bool	is_writer ()
	check whether bucket is locked for write
bucket *	operator() ()
	get bucket pointer
bool	upgrade_to_writer ()

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Detailed Description

template<typename Key, typename T, typename HashCompare, typename Allocator>
class tbb::interface4::concurrent_hash_map< Key, T, HashCompare, Allocator >::bucket_accessor

Definition at line 630 of file concurrent_hash_map.h.

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Constructor & Destructor Documentation

template<typename Key , typename T , typename HashCompare , typename Allocator >

tbb::interface4::concurrent_hash_map< Key, T, HashCompare, Allocator >::bucket_accessor::bucket_accessor	(	concurrent_hash_map *	base,
		const hashcode_t	h,
		bool	writer = false
	)			[inline]

Definition at line 634 of file concurrent_hash_map.h.

: public bucket::scoped_t {

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Member Function Documentation

template<typename Key , typename T , typename HashCompare , typename Allocator >

void tbb::interface4::concurrent_hash_map< Key, T, HashCompare, Allocator >::bucket_accessor::acquire	(	concurrent_hash_map *	base,
		const hashcode_t	h,
		bool	writer = false
	)			[inline]

Definition at line 636 of file concurrent_hash_map.h.

References tbb::acquire.

          :
        bucket_accessor( concurrent_hash_map *base, const hashcode_t h, bool writer = false ) { acquire( base, h, writer ); }
        inline void acquire( concurrent_hash_map *base, const hashcode_t h, bool writer = false ) {
            my_b = base->get_bucket( h );
#if TBB_USE_THREADING_TOOLS
            // TODO: actually, notification is unnecessary here, just hiding double-check
            if( itt_load_pointer_with_acquire_v3(&my_b->node_list) == internal::rehash_req
#else
            if( __TBB_load_with_acquire(my_b->node_list) == internal::rehash_req
#endif
                && try_acquire( my_b->mutex, /*write=*/true ) )
            {
                if( my_b->node_list == internal::rehash_req ) base->rehash_bucket( my_b, h ); //recursive rehashing
                my_is_writer = true;

template<typename Key , typename T , typename HashCompare , typename Allocator >

bool tbb::interface4::concurrent_hash_map< Key, T, HashCompare, Allocator >::bucket_accessor::is_writer

(

)

[inline]

Definition at line 653 of file concurrent_hash_map.h.

Referenced by tbb::interface4::concurrent_hash_map< Key, T, HashCompare, Allocator >::lookup().

template<typename Key , typename T , typename HashCompare , typename Allocator >

bucket* tbb::interface4::concurrent_hash_map< Key, T, HashCompare, Allocator >::bucket_accessor::operator()

(

)

[inline]

Definition at line 655 of file concurrent_hash_map.h.

{ return my_is_writer; }

template<typename Key , typename T , typename HashCompare , typename Allocator >

bool tbb::interface4::concurrent_hash_map< Key, T, HashCompare, Allocator >::bucket_accessor::upgrade_to_writer

(

)

[inline]

Definition at line 657 of file concurrent_hash_map.h.

Referenced by tbb::interface4::concurrent_hash_map< Key, T, HashCompare, Allocator >::lookup().

{ return my_is_writer; }

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

• concurrent_hash_map.h