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/* Copyright (c) 2013-2019, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file workqueue.h
* \brief Header for workqueue.c
**/
#ifndef TOR_WORKQUEUE_H
#define TOR_WORKQUEUE_H
#include "lib/cc/torint.h"
/** A replyqueue is used to tell the main thread about the outcome of
* work that we queued for the workers. */
typedef struct replyqueue_s replyqueue_t;
/** A thread-pool manages starting threads and passing work to them. */
typedef struct threadpool_s threadpool_t;
/** A workqueue entry represents a request that has been passed to a thread
* pool. */
typedef struct workqueue_entry_s workqueue_entry_t;
/** Possible return value from a work function: */
typedef enum workqueue_reply_t {
WQ_RPL_REPLY = 0, /** indicates success */
WQ_RPL_ERROR = 1, /** indicates fatal error */
WQ_RPL_SHUTDOWN = 2, /** indicates thread is shutting down */
} workqueue_reply_t;
/** Possible priorities for work. Lower numeric values are more important. */
typedef enum workqueue_priority_t {
WQ_PRI_HIGH = 0,
WQ_PRI_MED = 1,
WQ_PRI_LOW = 2,
} workqueue_priority_t;
workqueue_entry_t *threadpool_queue_work_priority(threadpool_t *pool,
workqueue_priority_t prio,
workqueue_reply_t (*fn)(void *,
void *),
void (*reply_fn)(void *),
void *arg);
workqueue_entry_t *threadpool_queue_work(threadpool_t *pool,
workqueue_reply_t (*fn)(void *,
void *),
void (*reply_fn)(void *),
void *arg);
int threadpool_queue_update(threadpool_t *pool,
void *(*dup_fn)(void *),
workqueue_reply_t (*fn)(void *, void *),
void (*free_fn)(void *),
void *arg);
void *workqueue_entry_cancel(workqueue_entry_t *pending_work);
threadpool_t *threadpool_new(int n_threads,
replyqueue_t *replyqueue,
void *(*new_thread_state_fn)(void*),
void (*free_thread_state_fn)(void*),
void *arg);
replyqueue_t *threadpool_get_replyqueue(threadpool_t *tp);
replyqueue_t *replyqueue_new(uint32_t alertsocks_flags);
void replyqueue_process(replyqueue_t *queue);
struct event_base;
int threadpool_register_reply_event(threadpool_t *tp,
void (*cb)(threadpool_t *tp));
#endif /* !defined(TOR_WORKQUEUE_H) */
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