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/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#ifndef _NXT_WORK_QUEUE_H_INCLUDED_
#define _NXT_WORK_QUEUE_H_INCLUDED_
typedef struct nxt_work_s nxt_work_t;
struct nxt_task_s {
nxt_thread_t *thread;
nxt_log_t *log;
uint32_t ident;
nxt_work_t *next_work;
/* TODO: exception_handler, prev/next task, subtasks. */
};
#define nxt_task_next_ident() \
((uint32_t) nxt_atomic_fetch_add(&nxt_task_ident, 1) & 0x3FFFFFFF)
/*
* A work handler with just the obj and data arguments instead
* of pointer to a possibly large a work struct allows to call
* the handler not only via a work queue but also directly.
* The only obj argument is enough for the most cases except the
* source filters, so the data argument has been introduced and
* is used where appropriate.
*/
//typedef void (*nxt_work_handler_t)(nxt_task_t *task, void *obj, void *data);
struct nxt_work_s {
nxt_work_t *next;
nxt_work_handler_t handler;
nxt_task_t *task;
void *obj;
void *data;
};
typedef struct nxt_work_queue_chunk_s nxt_work_queue_chunk_t;
struct nxt_work_queue_chunk_s {
nxt_work_queue_chunk_t *next;
nxt_work_t work;
};
typedef struct {
nxt_work_t *next;
nxt_work_t *spare;
nxt_work_queue_chunk_t *chunk;
size_t chunk_size;
} nxt_work_queue_cache_t;
typedef struct nxt_work_queue_s nxt_work_queue_t;
struct nxt_work_queue_s {
nxt_work_t *head;
nxt_work_t *tail;
nxt_work_queue_cache_t *cache;
#if (NXT_DEBUG)
const char *name;
int32_t pid;
nxt_tid_t tid;
#endif
};
typedef struct {
nxt_thread_spinlock_t lock;
nxt_work_t *head;
nxt_work_t *tail;
nxt_work_queue_cache_t cache;
} nxt_locked_work_queue_t;
NXT_EXPORT void nxt_work_queue_cache_create(nxt_work_queue_cache_t *cache,
size_t chunk_size);
NXT_EXPORT void nxt_work_queue_cache_destroy(nxt_work_queue_cache_t *cache);
NXT_EXPORT void nxt_work_queue_add(nxt_work_queue_t *wq,
nxt_work_handler_t handler, nxt_task_t *task, void *obj, void *data);
NXT_EXPORT nxt_work_handler_t nxt_work_queue_pop(nxt_work_queue_t *wq,
nxt_task_t **task, void **obj, void **data);
#define nxt_work_set(_work, _handler, _task, _obj, _data) \
do { \
nxt_work_t *work = _work; \
\
work->handler = _handler; \
work->task = _task; \
work->obj = _obj; \
work->data = _data; \
} while (0)
#if (NXT_DEBUG)
NXT_EXPORT void nxt_work_queue_name(nxt_work_queue_t *wq, const char *name);
NXT_EXPORT void nxt_work_queue_thread_adopt(nxt_work_queue_t *wq);
#else
#define nxt_work_queue_name(_wq, _name)
#define nxt_work_queue_thread_adopt(_wq)
#endif
NXT_EXPORT void nxt_locked_work_queue_add(nxt_locked_work_queue_t *lwq,
nxt_work_t *work);
NXT_EXPORT nxt_work_handler_t nxt_locked_work_queue_pop(
nxt_locked_work_queue_t *lwq, nxt_task_t **task, void **obj, void **data);
NXT_EXPORT void nxt_locked_work_queue_move(nxt_thread_t *thr,
nxt_locked_work_queue_t *lwq, nxt_work_queue_t *wq);
#endif /* _NXT_WORK_QUEUE_H_INCLUDED_ */
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