/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#ifndef _NXT_MEM_POOL_H_INCLUDED_
#define _NXT_MEM_POOL_H_INCLUDED_
#define NXT_MEM_POOL_MIN_EXT_SIZE nxt_pagesize
typedef void (*nxt_mem_pool_cleanup_handler_t)(void *data);
typedef struct nxt_mem_pool_cleanup_s nxt_mem_pool_cleanup_t;
typedef struct nxt_mem_pool_cache_s nxt_mem_pool_cache_t;
typedef struct nxt_mem_pool_chunk_s nxt_mem_pool_chunk_t;
typedef struct nxt_mem_pool_ext_s nxt_mem_pool_ext_t;
struct nxt_mem_pool_cleanup_s {
nxt_mem_pool_cleanup_handler_t handler;
void *data;
nxt_mem_pool_cleanup_t *next;
};
struct nxt_mem_pool_ext_s {
void *data;
nxt_mem_pool_ext_t *next;
};
struct nxt_mem_pool_chunk_s {
u_char *free;
u_char *end;
nxt_mem_pool_chunk_t *next;
uint32_t fails; /* 8 bits */
};
struct nxt_mem_pool_cache_s {
uint32_t size;
uint32_t nalloc;
void *free;
nxt_mem_pool_cache_t *next;
};
struct nxt_mem_pool_s {
nxt_mem_pool_chunk_t chunk;
uint32_t min_ext_size;
uint32_t chunk_size;
nxt_mem_pool_chunk_t *current;
nxt_mem_pool_ext_t *ext;
nxt_mem_pool_cache_t *cache;
nxt_mem_pool_cleanup_t *cleanup;
#if (NXT_DEBUG)
nxt_pid_t pid;
nxt_tid_t tid;
#endif
};
NXT_EXPORT nxt_mem_pool_t *nxt_mem_pool_create(size_t size)
NXT_MALLOC_LIKE;
NXT_EXPORT void nxt_mem_pool_destroy(nxt_mem_pool_t *mp);
/*
* Generic aligned allocation, suitable for struct allocations
* without "long double" and SIMD values.
*/
#define \
nxt_mem_alloc(mp, size) \
nxt_mem_align((mp), NXT_ALIGNMENT, (size))
NXT_EXPORT void *nxt_mem_align(nxt_mem_pool_t *mp, size_t alignment,
size_t size)
NXT_MALLOC_LIKE;
NXT_EXPORT void *nxt_mem_zalign(nxt_mem_pool_t *mp, size_t alignment,
size_t size)
NXT_MALLOC_LIKE;
NXT_EXPORT void *nxt_mem_nalloc(nxt_mem_pool_t *mp, size_t size)
NXT_MALLOC_LIKE;
NXT_EXPORT void *nxt_mem_zalloc(nxt_mem_pool_t *mp, size_t size)
NXT_MALLOC_LIKE;
/*
* nxt_mem_buf() is intended to allocate I/O buffers.
* Unix network buffers usually have no size restrictions, so
* NXT_MEM_BUF_CUTBACK and NXT_MEM_BUF_USABLE options allow to
* utilize better allocated memory (details in unix/nxt_malloc.h).
* Windows locks buffers in kernel memory on page basis for both
* network and file operations, so nxt_mem_buf() should minimize
* number of allocated pages. However, these allocations are not
* necessary page-aligned.
*/
#define NXT_MEM_BUF_CUTBACK 1
#define NXT_MEM_BUF_USABLE 2
NXT_EXPORT void *nxt_mem_buf(nxt_mem_pool_t *mp, size_t *sizep,
nxt_uint_t flags);
/*
* Aligned allocation, suitable for generic allocations compatible
* with malloc() alignment.
*/
#define \
nxt_mem_malloc(mp, size) \
nxt_mem_align((mp), NXT_MAX_ALIGNMENT, (size))
NXT_EXPORT nxt_int_t nxt_mem_free(nxt_mem_pool_t *mp, void *p);
NXT_EXPORT nxt_mem_pool_cleanup_t *nxt_mem_pool_cleanup(nxt_mem_pool_t *mp,
size_t size);
NXT_EXPORT void *nxt_mem_cache_alloc0(nxt_mem_pool_t *mp, size_t size)
NXT_MALLOC_LIKE;
NXT_EXPORT void *nxt_mem_cache_zalloc0(nxt_mem_pool_t *mp, size_t size)
NXT_MALLOC_LIKE;
NXT_EXPORT void nxt_mem_cache_free0(nxt_mem_pool_t *mp, void *p, size_t size);
NXT_EXPORT void *nxt_mem_lvlhsh_alloc(void *ctx, size_t size,
nxt_uint_t nalloc);
NXT_EXPORT void nxt_mem_lvlhsh_free(void *ctx, void *p, size_t size);
#if (NXT_DEBUG)
#define \
nxt_mem_pool_debug_lock(_mp, _tid) \
(_mp->tid) = _tid
#else
#define \
nxt_mem_pool_debug_lock(_mp, _tid)
#endif
#endif /* _NXT_MEM_POOL_H_INCLUDED_ */
