114 lines
3.3 KiB
C
114 lines
3.3 KiB
C
/*
|
|
* runqueue.c - a simple task queueing/completion tracking helper
|
|
*
|
|
* Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#ifndef __LIBUBOX_RUNQUEUE_H
|
|
#define __LIBUBOX_RUNQUEUE_H
|
|
|
|
#include "list.h"
|
|
#include "safe_list.h"
|
|
#include "uloop.h"
|
|
|
|
struct runqueue;
|
|
struct runqueue_task;
|
|
struct runqueue_task_type;
|
|
|
|
struct runqueue {
|
|
struct safe_list tasks_active;
|
|
struct safe_list tasks_inactive;
|
|
struct uloop_timeout timeout;
|
|
|
|
int running_tasks;
|
|
int max_running_tasks;
|
|
bool stopped;
|
|
bool empty;
|
|
|
|
/* called when the runqueue is emptied */
|
|
void (*empty_cb)(struct runqueue *q);
|
|
};
|
|
|
|
struct runqueue_task_type {
|
|
const char *name;
|
|
|
|
/*
|
|
* called when a task is requested to run
|
|
*
|
|
* The task is removed from the list before this callback is run. It
|
|
* can re-arm itself using runqueue_task_add.
|
|
*/
|
|
void (*run)(struct runqueue *q, struct runqueue_task *t);
|
|
|
|
/*
|
|
* called to request cancelling a task
|
|
*
|
|
* int type is used as an optional hint for the method to be used when
|
|
* cancelling the task, e.g. a signal number for processes. Calls
|
|
* runqueue_task_complete when done.
|
|
*/
|
|
void (*cancel)(struct runqueue *q, struct runqueue_task *t, int type);
|
|
|
|
/*
|
|
* called to kill a task. must not make any calls to runqueue_task_complete,
|
|
* it has already been removed from the list.
|
|
*/
|
|
void (*kill)(struct runqueue *q, struct runqueue_task *t);
|
|
};
|
|
|
|
struct runqueue_task {
|
|
struct safe_list list;
|
|
const struct runqueue_task_type *type;
|
|
struct runqueue *q;
|
|
|
|
void (*complete)(struct runqueue *q, struct runqueue_task *t);
|
|
|
|
struct uloop_timeout timeout;
|
|
int run_timeout;
|
|
int cancel_timeout;
|
|
int cancel_type;
|
|
|
|
bool queued;
|
|
bool running;
|
|
bool cancelled;
|
|
};
|
|
|
|
struct runqueue_process {
|
|
struct runqueue_task task;
|
|
struct uloop_process proc;
|
|
};
|
|
|
|
void runqueue_init(struct runqueue *q);
|
|
void runqueue_cancel(struct runqueue *q);
|
|
void runqueue_cancel_active(struct runqueue *q);
|
|
void runqueue_cancel_pending(struct runqueue *q);
|
|
void runqueue_kill(struct runqueue *q);
|
|
|
|
void runqueue_stop(struct runqueue *q);
|
|
void runqueue_resume(struct runqueue *q);
|
|
|
|
void runqueue_task_add(struct runqueue *q, struct runqueue_task *t, bool running);
|
|
void runqueue_task_complete(struct runqueue_task *t);
|
|
|
|
void runqueue_task_cancel(struct runqueue_task *t, int type);
|
|
void runqueue_task_kill(struct runqueue_task *t);
|
|
|
|
void runqueue_process_add(struct runqueue *q, struct runqueue_process *p, pid_t pid);
|
|
|
|
/* to be used only from runqueue_process callbacks */
|
|
void runqueue_process_cancel_cb(struct runqueue *q, struct runqueue_task *t, int type);
|
|
void runqueue_process_kill_cb(struct runqueue *q, struct runqueue_task *t);
|
|
|
|
#endif
|