| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| /*------------------------------------------------------------------------- |
| * |
| * cdbchunkpool.h |
| * |
| * Allocates chunks of a fixed size from an underlying AsetDirectContext, |
| * and keeps a freelist for recycling them. |
| * |
| *------------------------------------------------------------------------- |
| */ |
| #ifndef CDBCHUNKPOOL_H |
| #define CDBCHUNKPOOL_H |
| |
| #include "cdb/cdbptrbuf.h" /* CdbPtrBuf */ |
| |
| typedef struct CdbChunkPool |
| { |
| Size bytesperchunk; /* chunk size in bytes */ |
| Size nchunk; /* current num chunks (in use + free) */ |
| CdbPtrBuf freechunks; /* collection of chunk ptrs to reuse */ |
| MemoryContext chunkcontext; /* alloc new chunks from this context */ |
| |
| /* |
| * Some extra storage is allocated following the struct to accommodate |
| * the first few pointers of the 'freechunks' collection. |
| */ |
| } CdbChunkPool; |
| |
| |
| CdbChunkPool * |
| CdbChunkPool_Create(Size bytesperchunk, |
| MemoryContext parentcontext, |
| const char *chunkcontextname); |
| |
| void |
| CdbChunkPool_Destroy(CdbChunkPool *pool); |
| |
| void * |
| CdbChunkPool_Alloc(CdbChunkPool *pool); |
| |
| void |
| CdbChunkPool_Free(CdbChunkPool *pool, void *chunk); |
| |
| Size |
| CdbChunkPool_GetCurrentSpace(CdbChunkPool *pool); |
| |
| #endif /* CDBCHUNKPOOL_H */ |