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SERVER-6405: start moving delete code into collection structure
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| // record_store.cpp | ||
|
|
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| /** | ||
| * Copyright (C) 2013 10gen Inc. | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero General Public License, version 3, | ||
| * as published by the Free Software Foundation. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Affero General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| * | ||
| * As a special exception, the copyright holders give permission to link the | ||
| * code of portions of this program with the OpenSSL library under certain | ||
| * conditions as described in each individual source file and distribute | ||
| * linked combinations including the program with the OpenSSL library. You | ||
| * must comply with the GNU Affero General Public License in all respects for | ||
| * all of the code used other than as permitted herein. If you modify file(s) | ||
| * with this exception, you may extend this exception to your version of the | ||
| * file(s), but you are not obligated to do so. If you do not wish to do so, | ||
| * delete this exception statement from your version. If you delete this | ||
| * exception statement from all source files in the program, then also delete | ||
| * it in the license file. | ||
| */ | ||
|
|
||
| #include "mongo/db/structure/record_store.h" | ||
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| #include "mongo/db/storage/extent.h" | ||
| #include "mongo/db/structure/collection.h" | ||
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| #include "mongo/db/pdfile.h" // XXX-ERH | ||
|
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| namespace mongo { | ||
|
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| RecordStore::RecordStore() { | ||
| _collection = NULL; | ||
| _details = NULL; | ||
| } | ||
|
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| void RecordStore::init( CollectionTemp* collection) { | ||
| _collection = collection; | ||
| _details = _collection->_details; | ||
| _isSystemIndexes = _collection->ns().coll() == "system.indexes"; | ||
| } | ||
|
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| void RecordStore::deallocRecord( const DiskLoc& dl, Record* todelete ) { | ||
| ExtentManager* em = _collection->getExtentManager(); | ||
|
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| /* remove ourself from the record next/prev chain */ | ||
| { | ||
| if ( todelete->prevOfs() != DiskLoc::NullOfs ) { | ||
| DiskLoc prev = em->getPrevRecordInExtent( dl ); | ||
| Record* prevRecord = em->recordFor( prev ); | ||
| getDur().writingInt( prevRecord->nextOfs() ) = todelete->nextOfs(); | ||
| } | ||
|
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| if ( todelete->nextOfs() != DiskLoc::NullOfs ) { | ||
| DiskLoc next = em->getNextRecord( dl ); | ||
| Record* nextRecord = em->recordFor( next ); | ||
| getDur().writingInt( nextRecord->prevOfs() ) = todelete->prevOfs(); | ||
| } | ||
| } | ||
|
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| /* remove ourself from extent pointers */ | ||
| { | ||
| Extent *e = getDur().writing( todelete->myExtent(dl) ); | ||
| if ( e->firstRecord == dl ) { | ||
| if ( todelete->nextOfs() == DiskLoc::NullOfs ) | ||
| e->firstRecord.Null(); | ||
| else | ||
| e->firstRecord.set(dl.a(), todelete->nextOfs() ); | ||
| } | ||
| if ( e->lastRecord == dl ) { | ||
| if ( todelete->prevOfs() == DiskLoc::NullOfs ) | ||
| e->lastRecord.Null(); | ||
| else | ||
| e->lastRecord.set(dl.a(), todelete->prevOfs() ); | ||
| } | ||
| } | ||
|
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| /* add to the free list */ | ||
| { | ||
| _details->incrementStats( -1 * todelete->netLength(), -1 ); | ||
|
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| if ( _isSystemIndexes ) { | ||
| /* temp: if in system.indexes, don't reuse, and zero out: we want to be | ||
| careful until validated more, as IndexDetails has pointers | ||
| to this disk location. so an incorrectly done remove would cause | ||
| a lot of problems. | ||
| */ | ||
| memset( getDur().writingPtr(todelete, todelete->lengthWithHeaders() ), | ||
| 0, todelete->lengthWithHeaders() ); | ||
| } | ||
| else { | ||
| DEV { | ||
| unsigned long long *p = reinterpret_cast<unsigned long long *>( todelete->data() ); | ||
| *getDur().writing(p) = 0; | ||
| } | ||
| _details->addDeletedRec((DeletedRecord*)todelete, dl); | ||
| } | ||
| } | ||
|
|
||
| } | ||
|
|
||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| // record_store.h | ||
|
|
||
| /** | ||
| * Copyright (C) 2013 10gen Inc. | ||
| * | ||
| * This program is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero General Public License, version 3, | ||
| * as published by the Free Software Foundation. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU Affero General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| * | ||
| * As a special exception, the copyright holders give permission to link the | ||
| * code of portions of this program with the OpenSSL library under certain | ||
| * conditions as described in each individual source file and distribute | ||
| * linked combinations including the program with the OpenSSL library. You | ||
| * must comply with the GNU Affero General Public License in all respects for | ||
| * all of the code used other than as permitted herein. If you modify file(s) | ||
| * with this exception, you may extend this exception to your version of the | ||
| * file(s), but you are not obligated to do so. If you do not wish to do so, | ||
| * delete this exception statement from your version. If you delete this | ||
| * exception statement from all source files in the program, then also delete | ||
| * it in the license file. | ||
| */ | ||
|
|
||
| #pragma once | ||
|
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| #include "mongo/db/namespace_details.h" | ||
|
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| namespace mongo { | ||
|
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| class CollectionTemp; | ||
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| class RecordStore { | ||
| public: | ||
| RecordStore(); | ||
|
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| void init( CollectionTemp* collection ); | ||
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| void deallocRecord( const DiskLoc& dl, Record* todelete ); | ||
|
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| private: | ||
| CollectionTemp* _collection; | ||
| NamespaceDetails* _details; | ||
| bool _isSystemIndexes; | ||
| }; | ||
|
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| } |