view src/core/ngx_thread_pool.h @ 6445:c9d680b00744

Cache: added watermark to reduce IO load when keys_zone is full. When a keys_zone is full then each next request to the cache is penalized. That is, the cache has to evict older files to get a slot from the keys_zone synchronously. The patch introduces new behavior in this scenario. Manager will try to maintain available free slots in the keys_zone by cleaning old files in the background.
author Dmitry Volyntsev <xeioex@nginx.com>
date Fri, 18 Mar 2016 15:08:21 +0300
parents 466bd63b63d1
children
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/*
 * Copyright (C) Nginx, Inc.
 * Copyright (C) Valentin V. Bartenev
 */


#ifndef _NGX_THREAD_POOL_H_INCLUDED_
#define _NGX_THREAD_POOL_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_event.h>


struct ngx_thread_task_s {
    ngx_thread_task_t   *next;
    ngx_uint_t           id;
    void                *ctx;
    void               (*handler)(void *data, ngx_log_t *log);
    ngx_event_t          event;
};


typedef struct ngx_thread_pool_s  ngx_thread_pool_t;


ngx_thread_pool_t *ngx_thread_pool_add(ngx_conf_t *cf, ngx_str_t *name);
ngx_thread_pool_t *ngx_thread_pool_get(ngx_cycle_t *cycle, ngx_str_t *name);

ngx_thread_task_t *ngx_thread_task_alloc(ngx_pool_t *pool, size_t size);
ngx_int_t ngx_thread_task_post(ngx_thread_pool_t *tp, ngx_thread_task_t *task);


#endif /* _NGX_THREAD_POOL_H_INCLUDED_ */