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/*
* MessagePack for C memory pool implementation
*
* Copyright (C) 2008-2010 FURUHASHI Sadayuki
*
* Licensed 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.
*/
#ifndef MSGPACK_ZONE_H
#define MSGPACK_ZONE_H
#include "sysdep.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @defgroup msgpack_zone Memory zone
* @ingroup msgpack
* @{
*/
typedef struct msgpack_zone_finalizer {
void (*func)(void* data);
void* data;
} msgpack_zone_finalizer;
typedef struct msgpack_zone_finalizer_array {
msgpack_zone_finalizer* tail;
msgpack_zone_finalizer* end;
msgpack_zone_finalizer* array;
} msgpack_zone_finalizer_array;
struct msgpack_zone_chunk;
typedef struct msgpack_zone_chunk msgpack_zone_chunk;
typedef struct msgpack_zone_chunk_list {
size_t free;
char* ptr;
msgpack_zone_chunk* head;
} msgpack_zone_chunk_list;
typedef struct msgpack_zone {
msgpack_zone_chunk_list chunk_list;
msgpack_zone_finalizer_array finalizer_array;
size_t chunk_size;
} msgpack_zone;
#ifndef MSGPACK_ZONE_CHUNK_SIZE
#define MSGPACK_ZONE_CHUNK_SIZE 8192
#endif
MSGPACK_DLLEXPORT
bool msgpack_zone_init(msgpack_zone* zone, size_t chunk_size);
MSGPACK_DLLEXPORT
void msgpack_zone_destroy(msgpack_zone* zone);
MSGPACK_DLLEXPORT
msgpack_zone* msgpack_zone_new(size_t chunk_size);
MSGPACK_DLLEXPORT
void msgpack_zone_free(msgpack_zone* zone);
static inline void* msgpack_zone_malloc(msgpack_zone* zone, size_t size);
static inline void* msgpack_zone_malloc_no_align(msgpack_zone* zone, size_t size);
static inline bool msgpack_zone_push_finalizer(msgpack_zone* zone,
void (*func)(void* data), void* data);
static inline void msgpack_zone_swap(msgpack_zone* a, msgpack_zone* b);
MSGPACK_DLLEXPORT
bool msgpack_zone_is_empty(msgpack_zone* zone);
MSGPACK_DLLEXPORT
void msgpack_zone_clear(msgpack_zone* zone);
/** @} */
#ifndef MSGPACK_ZONE_ALIGN
#define MSGPACK_ZONE_ALIGN sizeof(void*)
#endif
MSGPACK_DLLEXPORT
void* msgpack_zone_malloc_expand(msgpack_zone* zone, size_t size);
static inline void* msgpack_zone_malloc_no_align(msgpack_zone* zone, size_t size)
{
char* ptr;
msgpack_zone_chunk_list* cl = &zone->chunk_list;
if(zone->chunk_list.free < size) {
return msgpack_zone_malloc_expand(zone, size);
}
ptr = cl->ptr;
cl->free -= size;
cl->ptr += size;
return ptr;
}
static inline void* msgpack_zone_malloc(msgpack_zone* zone, size_t size)
{
char* aligned =
(char*)(
(size_t)(
zone->chunk_list.ptr + (MSGPACK_ZONE_ALIGN - 1)
) / MSGPACK_ZONE_ALIGN * MSGPACK_ZONE_ALIGN
);
size_t adjusted_size = size + (aligned - zone->chunk_list.ptr);
if(zone->chunk_list.free >= adjusted_size) {
zone->chunk_list.free -= adjusted_size;
zone->chunk_list.ptr += adjusted_size;
return aligned;
}
{
void* ptr = msgpack_zone_malloc_expand(zone, size + (MSGPACK_ZONE_ALIGN - 1));
if (ptr) {
return (char*)((size_t)(ptr) / MSGPACK_ZONE_ALIGN * MSGPACK_ZONE_ALIGN);
}
}
return NULL;
}
bool msgpack_zone_push_finalizer_expand(msgpack_zone* zone,
void (*func)(void* data), void* data);
static inline bool msgpack_zone_push_finalizer(msgpack_zone* zone,
void (*func)(void* data), void* data)
{
msgpack_zone_finalizer_array* const fa = &zone->finalizer_array;
msgpack_zone_finalizer* fin = fa->tail;
if(fin == fa->end) {
return msgpack_zone_push_finalizer_expand(zone, func, data);
}
fin->func = func;
fin->data = data;
++fa->tail;
return true;
}
static inline void msgpack_zone_swap(msgpack_zone* a, msgpack_zone* b)
{
msgpack_zone tmp = *a;
*a = *b;
*b = tmp;
}
#ifdef __cplusplus
}
#endif
#endif /* msgpack/zone.h */
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