mirror of https://gitee.com/bigwinds/arangodb
739 lines
25 KiB
C++
739 lines
25 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief primary collection
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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 2004-2013 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 triAGENS GmbH, Cologne, Germany
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///
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/// @author Dr. Frank Celler
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/// @author Copyright 2011-2013, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "primary-collection.h"
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#include "BasicsC/conversions.h"
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#include "BasicsC/files.h"
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#include "BasicsC/hashes.h"
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#include "BasicsC/logging.h"
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#include "BasicsC/tri-strings.h"
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#include "VocBase/key-generator.h"
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#include "VocBase/server.h"
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#include "VocBase/voc-shaper.h"
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// -----------------------------------------------------------------------------
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// --SECTION-- private functions
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup VocBase
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief hashes the document id
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////////////////////////////////////////////////////////////////////////////////
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static uint64_t HashKeyHeader (TRI_associative_pointer_t* array, void const* key) {
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return TRI_FnvHashString((char const*) key);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief hashes the document header
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////////////////////////////////////////////////////////////////////////////////
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static uint64_t HashElementDocument (TRI_associative_pointer_t* array, void const* element) {
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TRI_doc_mptr_t const* e = static_cast<TRI_doc_mptr_t const*>(element);
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return TRI_FnvHashString((char const*) e->_key);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief compares a document id and a document
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////////////////////////////////////////////////////////////////////////////////
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static bool IsEqualKeyDocument (TRI_associative_pointer_t* array, void const* key, void const* element) {
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TRI_doc_mptr_t const* e = static_cast<TRI_doc_mptr_t const*>(element);
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char const * k = static_cast<char const*>(key);
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return (strcmp(k, e->_key) == 0);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief hashes a datafile identifier
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////////////////////////////////////////////////////////////////////////////////
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static uint64_t HashKeyDatafile (TRI_associative_pointer_t* array, void const* key) {
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TRI_voc_fid_t const* k = static_cast<TRI_voc_fid_t const*>(key);
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return *k;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief hashes a datafile identifier
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////////////////////////////////////////////////////////////////////////////////
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static uint64_t HashElementDatafile (TRI_associative_pointer_t* array, void const* element) {
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TRI_doc_datafile_info_t const* e = static_cast<TRI_doc_datafile_info_t const*>(element);
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return e->_fid;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief compares a datafile identifier and a datafile info
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////////////////////////////////////////////////////////////////////////////////
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static bool IsEqualKeyElementDatafile (TRI_associative_pointer_t* array, void const* key, void const* element) {
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TRI_voc_fid_t const* k = static_cast<TRI_voc_fid_t const*>(key);
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TRI_doc_datafile_info_t const* e = static_cast<TRI_doc_datafile_info_t const*>(element);
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return *k == e->_fid;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief debug output for datafile information
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////////////////////////////////////////////////////////////////////////////////
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static void DebugDatafileInfoDatafile (TRI_primary_collection_t* primary,
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TRI_datafile_t* datafile) {
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TRI_doc_datafile_info_t* dfi;
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printf("FILE '%s'\n", datafile->getName(datafile));
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dfi = TRI_FindDatafileInfoPrimaryCollection(primary, datafile->_fid, false);
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if (dfi == NULL) {
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printf(" no info\n\n");
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}
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else {
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printf(" number alive: %llu\n", (unsigned long long) dfi->_numberAlive);
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printf(" size alive: %llu\n", (unsigned long long) dfi->_sizeAlive);
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printf(" number dead: %llu\n", (unsigned long long) dfi->_numberDead);
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printf(" size dead: %llu\n", (unsigned long long) dfi->_sizeDead);
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printf(" number shapes: %llu\n", (unsigned long long) dfi->_numberShapes);
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printf(" size shapes: %llu\n", (unsigned long long) dfi->_sizeShapes);
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printf(" number attributes: %llu\n", (unsigned long long) dfi->_numberAttributes);
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printf(" size attributes: %llu\n", (unsigned long long) dfi->_sizeAttributes);
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printf(" numberdeletion: %llu\n", (unsigned long long) dfi->_numberDeletion);
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printf("\n");
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief debug output for datafile information
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////////////////////////////////////////////////////////////////////////////////
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static void DebugDatafileInfoPrimaryCollection (TRI_primary_collection_t* primary) {
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size_t n;
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// journals
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n = primary->base._journals._length;
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if (n > 0) {
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printf("JOURNALS (%d)\n-----------------------------\n", (int) n);
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for (size_t i = 0; i < n; ++i) {
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TRI_datafile_t* datafile = static_cast<TRI_datafile_t*>(primary->base._journals._buffer[i]);
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DebugDatafileInfoDatafile(primary, datafile);
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}
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}
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// compactors
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n = primary->base._compactors._length;
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if (n > 0) {
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printf("COMPACTORS (%d)\n-----------------------------\n", (int) n);
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for (size_t i = 0; i < n; ++i) {
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TRI_datafile_t* datafile = static_cast<TRI_datafile_t*>(primary->base._compactors._buffer[i]);
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DebugDatafileInfoDatafile(primary, datafile);
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}
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}
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// datafiles
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n = primary->base._datafiles._length;
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if (n > 0) {
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printf("DATAFILES (%d)\n-----------------------------\n", (int) n);
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for (size_t i = 0; i < n; ++i) {
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TRI_datafile_t* datafile = static_cast<TRI_datafile_t*>(primary->base._datafiles._buffer[i]);
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DebugDatafileInfoDatafile(primary, datafile);
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief creates a compactor file
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////////////////////////////////////////////////////////////////////////////////
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static TRI_datafile_t* CreateCompactor (TRI_primary_collection_t* primary,
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TRI_voc_fid_t fid,
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TRI_voc_size_t maximalSize) {
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TRI_col_header_marker_t cm;
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TRI_collection_t* collection;
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TRI_datafile_t* journal;
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TRI_df_marker_t* position;
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int res;
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collection = &primary->base;
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if (collection->_info._isVolatile) {
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// in-memory collection
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journal = TRI_CreateDatafile(NULL, fid, maximalSize, true);
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}
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else {
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char* jname;
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char* number;
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char* filename;
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number = TRI_StringUInt64(fid);
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jname = TRI_Concatenate3String("compaction-", number, ".db");
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filename = TRI_Concatenate2File(collection->_directory, jname);
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TRI_FreeString(TRI_CORE_MEM_ZONE, number);
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TRI_FreeString(TRI_CORE_MEM_ZONE, jname);
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if (TRI_ExistsFile(filename)) {
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// remove any existing temporary file first
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TRI_UnlinkFile(filename);
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}
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journal = TRI_CreateDatafile(filename, fid, maximalSize, true);
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TRI_FreeString(TRI_CORE_MEM_ZONE, filename);
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}
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if (journal == NULL) {
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if (TRI_errno() == TRI_ERROR_OUT_OF_MEMORY_MMAP) {
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collection->_lastError = TRI_set_errno(TRI_ERROR_OUT_OF_MEMORY_MMAP);
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collection->_state = TRI_COL_STATE_READ;
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}
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else {
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collection->_lastError = TRI_set_errno(TRI_ERROR_ARANGO_NO_JOURNAL);
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collection->_state = TRI_COL_STATE_WRITE_ERROR;
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}
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return NULL;
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}
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LOG_TRACE("created new compactor '%s'", journal->getName(journal));
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// create a collection header, still in the temporary file
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res = TRI_ReserveElementDatafile(journal, sizeof(TRI_col_header_marker_t), &position, maximalSize);
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if (res != TRI_ERROR_NO_ERROR) {
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collection->_lastError = journal->_lastError;
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LOG_ERROR("cannot create document header in compactor '%s': %s", journal->getName(journal), TRI_last_error());
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TRI_FreeDatafile(journal);
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return NULL;
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}
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TRI_InitMarker((char*) &cm, TRI_COL_MARKER_HEADER, sizeof(TRI_col_header_marker_t));
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cm.base._tick = (TRI_voc_tick_t) fid;
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cm._type = (TRI_col_type_t) collection->_info._type;
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cm._cid = collection->_info._cid;
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res = TRI_WriteCrcElementDatafile(journal, position, &cm.base, sizeof(cm), false);
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if (res != TRI_ERROR_NO_ERROR) {
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collection->_lastError = journal->_lastError;
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LOG_ERROR("cannot create document header in compactor '%s': %s", journal->getName(journal), TRI_last_error());
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TRI_FreeDatafile(journal);
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return NULL;
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}
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assert(fid == journal->_fid);
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return journal;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief creates a journal
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////////////////////////////////////////////////////////////////////////////////
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static TRI_datafile_t* CreateJournal (TRI_primary_collection_t* primary,
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TRI_voc_size_t maximalSize) {
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TRI_col_header_marker_t cm;
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TRI_collection_t* collection;
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TRI_datafile_t* journal;
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TRI_df_marker_t* position;
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TRI_voc_fid_t fid;
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int res;
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collection = &primary->base;
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fid = (TRI_voc_fid_t) TRI_NewTickServer();
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if (collection->_info._isVolatile) {
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// in-memory collection
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journal = TRI_CreateDatafile(NULL, fid, maximalSize, true);
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}
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else {
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char* jname;
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char* number;
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char* filename;
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// construct a suitable filename (which is temporary at the beginning)
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number = TRI_StringUInt64(fid);
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jname = TRI_Concatenate3String("temp-", number, ".db");
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filename = TRI_Concatenate2File(collection->_directory, jname);
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TRI_FreeString(TRI_CORE_MEM_ZONE, number);
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TRI_FreeString(TRI_CORE_MEM_ZONE, jname);
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journal = TRI_CreateDatafile(filename, fid, maximalSize, true);
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TRI_FreeString(TRI_CORE_MEM_ZONE, filename);
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}
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if (journal == NULL) {
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if (TRI_errno() == TRI_ERROR_OUT_OF_MEMORY_MMAP) {
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collection->_lastError = TRI_set_errno(TRI_ERROR_OUT_OF_MEMORY_MMAP);
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collection->_state = TRI_COL_STATE_READ;
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}
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else {
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collection->_lastError = TRI_set_errno(TRI_ERROR_ARANGO_NO_JOURNAL);
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collection->_state = TRI_COL_STATE_WRITE_ERROR;
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}
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return NULL;
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}
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LOG_TRACE("created new journal '%s'", journal->getName(journal));
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// create a collection header, still in the temporary file
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res = TRI_ReserveElementDatafile(journal, sizeof(TRI_col_header_marker_t), &position, maximalSize);
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if (res != TRI_ERROR_NO_ERROR) {
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collection->_lastError = journal->_lastError;
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LOG_ERROR("cannot create document header in journal '%s': %s", journal->getName(journal), TRI_last_error());
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TRI_FreeDatafile(journal);
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return NULL;
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}
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TRI_InitMarker((char*) &cm, TRI_COL_MARKER_HEADER, sizeof(TRI_col_header_marker_t));
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cm.base._tick = (TRI_voc_tick_t) fid;
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cm._type = (TRI_col_type_t) collection->_info._type;
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cm._cid = collection->_info._cid;
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res = TRI_WriteCrcElementDatafile(journal, position, &cm.base, sizeof(cm), true);
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if (res != TRI_ERROR_NO_ERROR) {
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collection->_lastError = journal->_lastError;
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LOG_ERROR("cannot create document header in journal '%s': %s", journal->getName(journal), TRI_last_error());
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TRI_FreeDatafile(journal);
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return NULL;
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}
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assert(fid == journal->_fid);
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// if a physical file, we can rename it from the temporary name to the correct name
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if (journal->isPhysical(journal)) {
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char* jname;
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char* number;
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char* filename;
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bool ok;
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// and use the correct name
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number = TRI_StringUInt64(journal->_fid);
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jname = TRI_Concatenate3String("journal-", number, ".db");
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filename = TRI_Concatenate2File(collection->_directory, jname);
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TRI_FreeString(TRI_CORE_MEM_ZONE, number);
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TRI_FreeString(TRI_CORE_MEM_ZONE, jname);
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ok = TRI_RenameDatafile(journal, filename);
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if (! ok) {
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LOG_ERROR("failed to rename the journal to '%s': %s", filename, TRI_last_error());
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TRI_FreeDatafile(journal);
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TRI_FreeString(TRI_CORE_MEM_ZONE, filename);
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return NULL;
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}
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else {
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LOG_TRACE("renamed journal from %s to '%s'", journal->getName(journal), filename);
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}
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TRI_FreeString(TRI_CORE_MEM_ZONE, filename);
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}
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TRI_PushBackVectorPointer(&collection->_journals, journal);
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return journal;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief closes a journal
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///
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/// Note that the caller must hold a lock protecting the _datafiles and
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/// _journals entry.
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////////////////////////////////////////////////////////////////////////////////
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static bool CloseJournalPrimaryCollection (TRI_primary_collection_t* primary,
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size_t position,
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bool compactor) {
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TRI_collection_t* collection;
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TRI_vector_pointer_t* vector;
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int res;
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collection = &primary->base;
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// either use a journal or a compactor
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if (compactor) {
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vector = &collection->_compactors;
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}
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else {
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vector = &collection->_journals;
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}
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// no journal at this position
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if (vector->_length <= position) {
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TRI_set_errno(TRI_ERROR_ARANGO_NO_JOURNAL);
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return false;
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}
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// seal and rename datafile
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TRI_datafile_t* journal = static_cast<TRI_datafile_t*>(vector->_buffer[position]);
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res = TRI_SealDatafile(journal);
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if (res != TRI_ERROR_NO_ERROR) {
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LOG_ERROR("failed to seal datafile '%s': %s", journal->getName(journal), TRI_last_error());
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if (! compactor) {
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TRI_RemoveVectorPointer(vector, position);
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TRI_PushBackVectorPointer(&collection->_datafiles, journal);
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}
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return false;
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}
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if (! compactor && journal->isPhysical(journal)) {
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// rename the file
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char* dname;
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char* filename;
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char* number;
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bool ok;
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number = TRI_StringUInt64(journal->_fid);
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dname = TRI_Concatenate3String("datafile-", number, ".db");
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filename = TRI_Concatenate2File(collection->_directory, dname);
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TRI_FreeString(TRI_CORE_MEM_ZONE, dname);
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TRI_FreeString(TRI_CORE_MEM_ZONE, number);
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ok = TRI_RenameDatafile(journal, filename);
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if (! ok) {
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LOG_ERROR("failed to rename datafile '%s' to '%s': %s", journal->getName(journal), filename, TRI_last_error());
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TRI_RemoveVectorPointer(vector, position);
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TRI_PushBackVectorPointer(&collection->_datafiles, journal);
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TRI_FreeString(TRI_CORE_MEM_ZONE, filename);
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return false;
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}
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TRI_FreeString(TRI_CORE_MEM_ZONE, filename);
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LOG_TRACE("closed file '%s'", journal->getName(journal));
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}
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if (! compactor) {
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TRI_RemoveVectorPointer(vector, position);
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TRI_PushBackVectorPointer(&collection->_datafiles, journal);
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}
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief free an assoc array of datafile infos
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////////////////////////////////////////////////////////////////////////////////
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static void FreeDatafileInfo (TRI_doc_datafile_info_t* dfi) {
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TRI_Free(TRI_UNKNOWN_MEM_ZONE, dfi);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief size of a primary collection
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///
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/// the caller must have read-locked the collection!
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////////////////////////////////////////////////////////////////////////////////
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static TRI_voc_size_t Count (TRI_primary_collection_t* primary) {
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return (TRI_voc_size_t) primary->_numberDocuments;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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// -----------------------------------------------------------------------------
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// --SECTION-- constructors and destructors
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// -----------------------------------------------------------------------------
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|
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup VocBase
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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|
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////////////////////////////////////////////////////////////////////////////////
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/// @brief initialises a primary collection
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////////////////////////////////////////////////////////////////////////////////
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|
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int TRI_InitPrimaryCollection (TRI_primary_collection_t* primary,
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TRI_shaper_t* shaper) {
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int res;
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primary->_shaper = shaper;
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primary->_capConstraint = NULL;
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primary->_keyGenerator = NULL;
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primary->_numberDocuments = 0;
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primary->_lastCompaction = 0.0;
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primary->size = Count;
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res = TRI_InitAssociativePointer(&primary->_datafileInfo,
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TRI_UNKNOWN_MEM_ZONE,
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HashKeyDatafile,
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HashElementDatafile,
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IsEqualKeyElementDatafile,
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NULL);
|
|
|
|
if (res != TRI_ERROR_NO_ERROR) {
|
|
return res;
|
|
}
|
|
|
|
res = TRI_InitAssociativePointer(&primary->_primaryIndex,
|
|
TRI_UNKNOWN_MEM_ZONE,
|
|
HashKeyHeader,
|
|
HashElementDocument,
|
|
IsEqualKeyDocument,
|
|
NULL);
|
|
|
|
if (res != TRI_ERROR_NO_ERROR) {
|
|
TRI_DestroyAssociativePointer(&primary->_datafileInfo);
|
|
|
|
return res;
|
|
}
|
|
|
|
TRI_InitBarrierList(&primary->_barrierList, primary);
|
|
|
|
TRI_InitReadWriteLock(&primary->_lock);
|
|
TRI_InitReadWriteLock(&primary->_compactionLock);
|
|
|
|
return TRI_ERROR_NO_ERROR;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief destroys a primary collection
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_DestroyPrimaryCollection (TRI_primary_collection_t* primary) {
|
|
size_t i, n;
|
|
|
|
if (primary->_keyGenerator != NULL) {
|
|
TRI_FreeKeyGenerator(primary->_keyGenerator);
|
|
}
|
|
|
|
TRI_DestroyReadWriteLock(&primary->_compactionLock);
|
|
TRI_DestroyReadWriteLock(&primary->_lock);
|
|
|
|
TRI_DestroyAssociativePointer(&primary->_primaryIndex);
|
|
|
|
if (primary->_shaper != NULL) {
|
|
TRI_FreeVocShaper(primary->_shaper);
|
|
}
|
|
|
|
n = primary->_datafileInfo._nrAlloc;
|
|
|
|
for (i = 0; i < n; ++i) {
|
|
TRI_doc_datafile_info_t* dfi = static_cast<TRI_doc_datafile_info_t*>(primary->_datafileInfo._table[i]);
|
|
|
|
if (dfi != NULL) {
|
|
FreeDatafileInfo(dfi);
|
|
}
|
|
}
|
|
|
|
TRI_DestroyAssociativePointer(&primary->_datafileInfo);
|
|
|
|
TRI_DestroyBarrierList(&primary->_barrierList);
|
|
|
|
TRI_DestroyCollection(&primary->base);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// --SECTION-- protected functions
|
|
// -----------------------------------------------------------------------------
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @addtogroup VocBase
|
|
/// @{
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief removes a datafile description
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_RemoveDatafileInfoPrimaryCollection (TRI_primary_collection_t* primary,
|
|
TRI_voc_fid_t fid) {
|
|
TRI_RemoveKeyAssociativePointer(&primary->_datafileInfo, &fid);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief finds a datafile description
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
TRI_doc_datafile_info_t* TRI_FindDatafileInfoPrimaryCollection (TRI_primary_collection_t* primary,
|
|
TRI_voc_fid_t fid,
|
|
bool create) {
|
|
TRI_doc_datafile_info_t const* found = static_cast<TRI_doc_datafile_info_t const*>(TRI_LookupByKeyAssociativePointer(&primary->_datafileInfo, &fid));
|
|
|
|
if (found != NULL) {
|
|
return const_cast<TRI_doc_datafile_info_t*>(found);
|
|
}
|
|
|
|
if (! create) {
|
|
return NULL;
|
|
}
|
|
|
|
// allocate and set to 0
|
|
TRI_doc_datafile_info_t* dfi = static_cast<TRI_doc_datafile_info_t*>(TRI_Allocate(TRI_UNKNOWN_MEM_ZONE, sizeof(TRI_doc_datafile_info_t), true));
|
|
|
|
if (dfi == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
dfi->_fid = fid;
|
|
|
|
TRI_InsertKeyAssociativePointer(&primary->_datafileInfo, &fid, dfi, true);
|
|
|
|
return dfi;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief creates a journal
|
|
///
|
|
/// Note that the caller must hold a lock protecting the _journals entry.
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
TRI_datafile_t* TRI_CreateJournalPrimaryCollection (TRI_primary_collection_t* primary,
|
|
TRI_voc_size_t size) {
|
|
return CreateJournal(primary, size);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief closes a journal
|
|
///
|
|
/// Note that the caller must hold a lock protecting the _datafiles and
|
|
/// _journals entry.
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool TRI_CloseJournalPrimaryCollection (TRI_primary_collection_t* primary,
|
|
size_t position) {
|
|
return CloseJournalPrimaryCollection(primary, position, false);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief creates a new compactor file
|
|
///
|
|
/// Note that the caller must hold a lock protecting the _journals entry.
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
TRI_datafile_t* TRI_CreateCompactorPrimaryCollection (TRI_primary_collection_t* primary,
|
|
TRI_voc_fid_t fid,
|
|
TRI_voc_size_t maximalSize) {
|
|
return CreateCompactor(primary, fid, maximalSize);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief closes an existing compactor file
|
|
///
|
|
/// Note that the caller must hold a lock protecting the _datafiles and
|
|
/// _journals entry.
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
bool TRI_CloseCompactorPrimaryCollection (TRI_primary_collection_t* primary,
|
|
size_t position) {
|
|
return CloseJournalPrimaryCollection(primary, position, true);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief dump information about all datafiles of a collection
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void TRI_DebugDatafileInfoPrimaryCollection (TRI_primary_collection_t* primary) {
|
|
DebugDatafileInfoPrimaryCollection(primary);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief iterate over all documents in the collection, using a user-defined
|
|
/// callback function. Returns the total number of documents in the collection
|
|
///
|
|
/// The user can abort the iteration by return "false" from the callback
|
|
/// function.
|
|
///
|
|
/// Note: the function will not acquire any locks. It is the task of the caller
|
|
/// to ensure the collection is properly locked
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
size_t TRI_DocumentIteratorPrimaryCollection (TRI_primary_collection_t* primary,
|
|
void* data,
|
|
bool (*callback)(TRI_doc_mptr_t const*, TRI_primary_collection_t*, void*)) {
|
|
if (primary->_primaryIndex._nrUsed > 0) {
|
|
void** ptr = primary->_primaryIndex._table;
|
|
void** end = ptr + primary->_primaryIndex._nrAlloc;
|
|
|
|
for (; ptr < end; ++ptr) {
|
|
if (*ptr) {
|
|
TRI_doc_mptr_t const* d = (TRI_doc_mptr_t const*) *ptr;
|
|
|
|
if (! callback(d, primary, data)) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return (size_t) primary->_primaryIndex._nrUsed;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @}
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Local Variables:
|
|
// mode: outline-minor
|
|
// outline-regexp: "/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|/// @page\\|// --SECTION--\\|/// @\\}"
|
|
// End:
|