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Intel Threading Building Blocks
book

Intel Threading Building Blocks

by James Reinders
July 2007
Intermediate to advanced content levelIntermediate to advanced
332 pages
10h 4m
English
O'Reilly Media, Inc.
Content preview from Intel Threading Building Blocks

Name

const_accessor — Provides read-only access to a pair in a concurrent_hash_map.

Synopsis

#include "tbb/concurrent_hash_map.h"

template<typename Key, typename T, typename HashCompare> class concurrent_hash_
map<Key,T,HashCompare>::const_accessor;

Description

A const_accessor permits read-only access to a key-value pair in a concurrent_hash_map.

Members

	namespace tbb {
	    template<typename Key, typename T, typename HashCompare>
	    class concurrent_hash_map<Key,T,HashCompare>::const_accessor {
	    public:
	        // types
	        typedef const std::pair<const Key,T> value_type;
	        // construction and destruction
	        const_accessor();
	        ~const_accessor();

	        // inspection
	        bool empty() const;
	        const value_type& operator*() const;
	        const value_type* operator->() const;

	        // early release
	        void release();
	};
}
bool empty() const

Returns: true if the instance points to nothing; false if the instance points to a key-value pair.

void release()

Effects: if the instance contains a key-value pair, releases the implied lock on the pair and sets the instance to point to nothing. Otherwise, does nothing.

constvalue_type&operator*() const

Effects: raises an assertion failure if empty() is true and TBB_DO_ASSERT is defined as nonzero.

Returns: const reference to a key-value pair.

constvalue_type*operator->() const

Returns: &operator*()*

const_accessor()

Effects: constructs a const_accessor that points to nothing.

~const_accessor

Effects: if pointing to a key-value pair, releases the implied lock on the pair.

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Publisher Resources

ISBN: 9780596514808Errata Page