mirror of https://gitee.com/bigwinds/arangodb
126 lines
5.1 KiB
C
126 lines
5.1 KiB
C
////////////////////////////////////////////////////////////////////////////////
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/// @brief primary hash index functionality
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2014 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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/// @author Martin Schoenert
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/// @author Copyright 2014, ArangoDB GmbH, Cologne, Germany
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/// @author Copyright 2006-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef ARANGODB_VOC_BASE_PRIMARY__INDEX_H
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#define ARANGODB_VOC_BASE_PRIMARY__INDEX_H 1
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#include "Basics/Common.h"
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#include "Basics/hashes.h"
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#include "Basics/locks.h"
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struct TRI_doc_mptr_t;
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// -----------------------------------------------------------------------------
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// --SECTION-- public types
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief associative array of pointers
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////////////////////////////////////////////////////////////////////////////////
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typedef struct TRI_primary_index_s {
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uint64_t _nrAlloc; // the size of the table
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uint64_t _nrUsed; // the number of used entries
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void** _table; // the table itself
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}
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TRI_primary_index_t;
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors and destructors
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief initialises the index
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////////////////////////////////////////////////////////////////////////////////
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int TRI_InitPrimaryIndex (TRI_primary_index_t*);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief destroys the index, but does not free the pointer
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////////////////////////////////////////////////////////////////////////////////
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void TRI_DestroyPrimaryIndex (TRI_primary_index_t*);
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// -----------------------------------------------------------------------------
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// --SECTION-- public functions
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @brief hash the key
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////////////////////////////////////////////////////////////////////////////////
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static inline uint64_t TRI_HashKeyPrimaryIndex (char const* key) {
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return TRI_FnvHashString(key);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief hash the key
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////////////////////////////////////////////////////////////////////////////////
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static inline uint64_t TRI_HashKeyPrimaryIndex (char const* key,
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size_t length) {
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return TRI_FnvHashPointer(static_cast<void const*>(key), length);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief lookups an element given a key
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////////////////////////////////////////////////////////////////////////////////
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void* TRI_LookupByKeyPrimaryIndex (TRI_primary_index_t*,
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char const* key);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief adds an key/element to the index
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/// returns a status code, and *found will contain a found element (if any)
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////////////////////////////////////////////////////////////////////////////////
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int TRI_InsertKeyPrimaryIndex (TRI_primary_index_t*,
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struct TRI_doc_mptr_t const*,
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void const**);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief removes a key/element from the index
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////////////////////////////////////////////////////////////////////////////////
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void* TRI_RemoveKeyPrimaryIndex (TRI_primary_index_t*,
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char const* key);
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#endif
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @page\\|// --SECTION--\\|/// @\\}"
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// End:
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