| /* |
| * 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. |
| */ |
| |
| /** |
| * @author Intel, Mikhail Y. Fursov |
| * |
| */ |
| |
| #ifndef _ARENA_H_ |
| #define _ARENA_H_ |
| |
| #ifdef unix |
| #include <unistd.h> |
| #endif |
| #include "open/types.h" |
| |
| |
| namespace Jitrino { |
| |
| typedef struct Arena { |
| struct Arena *next_arena; // next arena |
| char *next_byte; // next byte available in arena |
| char *last_byte; // end of arena space |
| char bytes[1]; // start of arena space |
| } Arena; |
| |
| #define ARENA_HEADER_SIZE ((sizeof(struct Arena *)+sizeof(char *)+sizeof(char *) + BITS_TO_CLEAR) & ~BITS_TO_CLEAR); |
| |
| static const U_32 default_arena_size = 1024; |
| // |
| // give empty space of memory, make it into an arena of given size. |
| // |
| Arena *init_arena(void *space, Arena *next_arena,size_t size); |
| // |
| // malloc (free) an arena from the global (thread-safe) heap |
| // |
| Arena *alloc_arena(Arena *next,size_t size); |
| void free_arena(Arena *a); |
| // |
| // allocates and return space from Arena |
| // |
| void *arena_alloc_space(Arena *arena,size_t size); |
| |
| } //namespace Jitrino |
| |
| #endif // _ARENA_H_ |
