190 lines
6.3 KiB
C
190 lines
6.3 KiB
C
/*-
|
|
* Copyright (c) 2000 Doug Rabson
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _SYS_TASKQUEUE_H_
|
|
#define _SYS_TASKQUEUE_H_
|
|
|
|
#ifndef _KERNEL
|
|
#error "no user-servicable parts inside"
|
|
#endif
|
|
|
|
#include <sys/queue.h>
|
|
#include <sys/_task.h>
|
|
#include <sys/_callout.h>
|
|
|
|
struct taskqueue;
|
|
struct thread;
|
|
|
|
struct timeout_task {
|
|
struct taskqueue *q;
|
|
struct task t;
|
|
struct callout c;
|
|
int f;
|
|
};
|
|
|
|
/*
|
|
* A notification callback function which is called from
|
|
* taskqueue_enqueue(). The context argument is given in the call to
|
|
* taskqueue_create(). This function would normally be used to allow the
|
|
* queue to arrange to run itself later (e.g., by scheduling a software
|
|
* interrupt or waking a kernel thread).
|
|
*/
|
|
typedef void (*taskqueue_enqueue_fn)(void *context);
|
|
|
|
struct taskqueue *taskqueue_create(const char *name, int mflags,
|
|
taskqueue_enqueue_fn enqueue,
|
|
void *context);
|
|
int taskqueue_start_threads(struct taskqueue **tqp, int count, int pri,
|
|
const char *name, ...) __printflike(4, 5);
|
|
int taskqueue_enqueue(struct taskqueue *queue, struct task *task);
|
|
int taskqueue_enqueue_timeout(struct taskqueue *queue,
|
|
struct timeout_task *timeout_task, int ticks);
|
|
int taskqueue_cancel(struct taskqueue *queue, struct task *task,
|
|
u_int *pendp);
|
|
int taskqueue_cancel_timeout(struct taskqueue *queue,
|
|
struct timeout_task *timeout_task, u_int *pendp);
|
|
void taskqueue_drain(struct taskqueue *queue, struct task *task);
|
|
void taskqueue_drain_timeout(struct taskqueue *queue,
|
|
struct timeout_task *timeout_task);
|
|
void taskqueue_free(struct taskqueue *queue);
|
|
void taskqueue_run(struct taskqueue *queue);
|
|
void taskqueue_block(struct taskqueue *queue);
|
|
void taskqueue_unblock(struct taskqueue *queue);
|
|
int taskqueue_member(struct taskqueue *queue, struct thread *td);
|
|
|
|
#define TASK_INITIALIZER(priority, func, context) \
|
|
{ .ta_pending = 0, \
|
|
.ta_priority = (priority), \
|
|
.ta_func = (func), \
|
|
.ta_context = (context) }
|
|
|
|
/*
|
|
* Functions for dedicated thread taskqueues
|
|
*/
|
|
void taskqueue_thread_loop(void *arg);
|
|
void taskqueue_thread_enqueue(void *context);
|
|
|
|
/*
|
|
* Initialise a task structure.
|
|
*/
|
|
#define TASK_INIT(task, priority, func, context) do { \
|
|
(task)->ta_pending = 0; \
|
|
(task)->ta_priority = (priority); \
|
|
(task)->ta_func = (func); \
|
|
(task)->ta_context = (context); \
|
|
} while (0)
|
|
|
|
void _timeout_task_init(struct taskqueue *queue,
|
|
struct timeout_task *timeout_task, int priority, task_fn_t func,
|
|
void *context);
|
|
#define TIMEOUT_TASK_INIT(queue, timeout_task, priority, func, context) \
|
|
_timeout_task_init(queue, timeout_task, priority, func, context);
|
|
|
|
/*
|
|
* Declare a reference to a taskqueue.
|
|
*/
|
|
#define TASKQUEUE_DECLARE(name) \
|
|
extern struct taskqueue *taskqueue_##name
|
|
|
|
/*
|
|
* Define and initialise a global taskqueue that uses sleep mutexes.
|
|
*/
|
|
#define TASKQUEUE_DEFINE(name, enqueue, context, init) \
|
|
\
|
|
struct taskqueue *taskqueue_##name; \
|
|
\
|
|
static void \
|
|
taskqueue_define_##name(void *arg) \
|
|
{ \
|
|
taskqueue_##name = \
|
|
taskqueue_create(#name, M_WAITOK, (enqueue), (context)); \
|
|
init; \
|
|
} \
|
|
\
|
|
SYSINIT(taskqueue_##name, SI_SUB_CONFIGURE, SI_ORDER_SECOND, \
|
|
taskqueue_define_##name, NULL); \
|
|
\
|
|
struct __hack
|
|
#define TASKQUEUE_DEFINE_THREAD(name) \
|
|
TASKQUEUE_DEFINE(name, taskqueue_thread_enqueue, &taskqueue_##name, \
|
|
taskqueue_start_threads(&taskqueue_##name, 1, PWAIT, \
|
|
"%s taskq", #name))
|
|
|
|
/*
|
|
* Define and initialise a global taskqueue that uses spin mutexes.
|
|
*/
|
|
#define TASKQUEUE_FAST_DEFINE(name, enqueue, context, init) \
|
|
\
|
|
struct taskqueue *taskqueue_##name; \
|
|
\
|
|
static void \
|
|
taskqueue_define_##name(void *arg) \
|
|
{ \
|
|
taskqueue_##name = \
|
|
taskqueue_create_fast(#name, M_WAITOK, (enqueue), \
|
|
(context)); \
|
|
init; \
|
|
} \
|
|
\
|
|
SYSINIT(taskqueue_##name, SI_SUB_CONFIGURE, SI_ORDER_SECOND, \
|
|
taskqueue_define_##name, NULL); \
|
|
\
|
|
struct __hack
|
|
#define TASKQUEUE_FAST_DEFINE_THREAD(name) \
|
|
TASKQUEUE_FAST_DEFINE(name, taskqueue_thread_enqueue, \
|
|
&taskqueue_##name, taskqueue_start_threads(&taskqueue_##name \
|
|
1, PWAIT, "%s taskq", #name))
|
|
|
|
/*
|
|
* These queues are serviced by software interrupt handlers. To enqueue
|
|
* a task, call taskqueue_enqueue(taskqueue_swi, &task) or
|
|
* taskqueue_enqueue(taskqueue_swi_giant, &task).
|
|
*/
|
|
TASKQUEUE_DECLARE(swi_giant);
|
|
TASKQUEUE_DECLARE(swi);
|
|
|
|
/*
|
|
* This queue is serviced by a kernel thread. To enqueue a task, call
|
|
* taskqueue_enqueue(taskqueue_thread, &task).
|
|
*/
|
|
TASKQUEUE_DECLARE(thread);
|
|
|
|
/*
|
|
* Queue for swi handlers dispatched from fast interrupt handlers.
|
|
* These are necessarily different from the above because the queue
|
|
* must be locked with spinlocks since sleep mutex's cannot be used
|
|
* from a fast interrupt handler context.
|
|
*/
|
|
TASKQUEUE_DECLARE(fast);
|
|
int taskqueue_enqueue_fast(struct taskqueue *queue, struct task *task);
|
|
struct taskqueue *taskqueue_create_fast(const char *name, int mflags,
|
|
taskqueue_enqueue_fn enqueue,
|
|
void *context);
|
|
|
|
#endif /* !_SYS_TASKQUEUE_H_ */
|