Apache HTTP Server 版本 2.4
Apache HTTP Server 版本 2.4
| 描述 | 基于槽的共享内存提供程序。 |
|---|---|
| 状态 | 扩展 |
| 模块标识符 | slotmem_plain_module |
| 源文件 | mod_slotmem_plain.c |
mod_slotmem_plain 是一个内存提供程序，它提供创建和访问一个简单的内存段的功能，其中数据集以“槽”的形式组织。
如果需要在线程和进程之间共享内存，更好的提供程序是 mod_slotmem_shm。
mod_slotmem_plain 提供以下 API 函数
/* call the callback on all worker slots */ apr_status_t doall(ap_slotmem_instance_t *s, ap_slotmem_callback_fn_t *func, void *data, apr_pool_t *pool) /* create a new slotmem with each item size is item_size */ apr_status_t create(ap_slotmem_instance_t **new, const char *name, apr_size_t item_size, unsigned int item_num, ap_slotmem_type_t type, apr_pool_t *pool) /* attach to an existing slotmem */ apr_status_t attach(ap_slotmem_instance_t **new, const char *name, apr_size_t *item_size, unsigned int *item_num, apr_pool_t *pool) /* get the direct pointer to the memory associated with this worker slot */ apr_status_t dptr(ap_slotmem_instance_t *s, unsigned int item_id, void **mem) /* get/read the memory from this slot to dest */ apr_status_t get(ap_slotmem_instance_t *s, unsigned int item_id, unsigned char *dest, apr_size_t dest_len) /* put/write the data from src to this slot */ apr_status_t put(ap_slotmem_instance_t *slot, unsigned int item_id, unsigned char *src, apr_size_t src_len) /* return the total number of slots in the segment */ unsigned int num_slots(ap_slotmem_instance_t *s) /* return the total data size, in bytes, of a slot in the segment */ apr_size_t slot_size(ap_slotmem_instance_t *s) /* grab or allocate the first free slot and mark as in-use (does not do any data copying) */ apr_status_t grab(ap_slotmem_instance_t *s, unsigned int *item_id) /* forced grab or allocate the specified slot and mark as in-use (does not do any data copying) */ apr_status_t fgrab(ap_slotmem_instance_t *s, unsigned int item_id) /* release or free a slot and mark as not in-use (does not do any data copying) */ apr_status_t release(ap_slotmem_instance_t *s, unsigned int item_id)
