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