FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/os/freebsd/spl/sys/taskq.h

     /*
      * CDDL HEADER START
      *
      * The contents of this file are subject to the terms of the
      * Common Development and Distribution License (the "License").
      * You may not use this file except in compliance with the License.
      *
      * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      * or https://opensource.org/licenses/CDDL-1.0.
     * See the License for the specific language governing permissions
     * and limitations under the License.
     *
     * When distributing Covered Code, include this CDDL HEADER in each
     * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     * If applicable, add the following below this CDDL HEADER, with the
     * fields enclosed by brackets "[]" replaced with your own identifying
     * information: Portions Copyright [yyyy] [name of copyright owner]
     *
     * CDDL HEADER END
     */
    /*
     * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
     * Use is subject to license terms.
     */
    
    #ifndef _SYS_TASKQ_H
    #define _SYS_TASKQ_H
    
    #ifdef _KERNEL
    
    #include <sys/types.h>
    #include <sys/proc.h>
    #include <sys/taskqueue.h>
    #include <sys/thread.h>
    #include <sys/ck.h>
    
    #ifdef  __cplusplus
    extern "C" {
    #endif
    
    #define TASKQ_NAMELEN   31
    
    typedef struct taskq {
            struct taskqueue        *tq_queue;
    } taskq_t;
    
    typedef uintptr_t taskqid_t;
    typedef void (task_func_t)(void *);
    
    typedef struct taskq_ent {
            struct task      tqent_task;
            struct timeout_task tqent_timeout_task;
            task_func_t     *tqent_func;
            void            *tqent_arg;
            taskqid_t tqent_id;
            CK_LIST_ENTRY(taskq_ent) tqent_hash;
            uint8_t tqent_type;
            uint8_t tqent_registered;
            uint8_t tqent_cancelled;
            volatile uint32_t tqent_rc;
    } taskq_ent_t;
    
    /*
     * Public flags for taskq_create(): bit range 0-15
     */
    #define TASKQ_PREPOPULATE       0x0001  /* Prepopulate with threads and data */
    #define TASKQ_CPR_SAFE          0x0002  /* Use CPR safe protocol */
    #define TASKQ_DYNAMIC           0x0004  /* Use dynamic thread scheduling */
    #define TASKQ_THREADS_CPU_PCT   0x0008  /* number of threads as % of ncpu */
    #define TASKQ_DC_BATCH          0x0010  /* Taskq uses SDC in batch mode */
    
    /*
     * Flags for taskq_dispatch. TQ_SLEEP/TQ_NOSLEEP should be same as
     * KM_SLEEP/KM_NOSLEEP.
     */
    #define TQ_SLEEP        0x00    /* Can block for memory */
    #define TQ_NOSLEEP      0x01    /* cannot block for memory; may fail */
    #define TQ_NOQUEUE      0x02    /* Do not enqueue if can't dispatch */
    #define TQ_NOALLOC      0x04    /* cannot allocate memory; may fail */
    #define TQ_FRONT        0x08    /* Put task at the front of the queue */
    
    #define TASKQID_INVALID         ((taskqid_t)0)
    
    #define taskq_init_ent(x)
    extern taskq_t *system_taskq;
    /* Global dynamic task queue for long delay */
    extern taskq_t *system_delay_taskq;
    
    extern taskqid_t taskq_dispatch(taskq_t *, task_func_t, void *, uint_t);
    extern taskqid_t taskq_dispatch_delay(taskq_t *, task_func_t, void *,
        uint_t, clock_t);
    extern void taskq_dispatch_ent(taskq_t *, task_func_t, void *, uint_t,
        taskq_ent_t *);
    extern int taskq_empty_ent(taskq_ent_t *);
    taskq_t *taskq_create(const char *, int, pri_t, int, int, uint_t);
    taskq_t *taskq_create_instance(const char *, int, int, pri_t, int, int, uint_t);
    taskq_t *taskq_create_proc(const char *, int, pri_t, int, int,
        struct proc *, uint_t);
    taskq_t *taskq_create_sysdc(const char *, int, int, int,
       struct proc *, uint_t, uint_t);
   void    nulltask(void *);
   extern void taskq_destroy(taskq_t *);
   extern void taskq_wait_id(taskq_t *, taskqid_t);
   extern void taskq_wait_outstanding(taskq_t *, taskqid_t);
   extern void taskq_wait(taskq_t *);
   extern int taskq_cancel_id(taskq_t *, taskqid_t);
   extern int taskq_member(taskq_t *, kthread_t *);
   extern taskq_t *taskq_of_curthread(void);
   void    taskq_suspend(taskq_t *);
   int     taskq_suspended(taskq_t *);
   void    taskq_resume(taskq_t *);
   
   #ifdef  __cplusplus
   }
   #endif
   
   #endif /* _KERNEL */
   
   #ifdef _STANDALONE
   typedef int taskq_ent_t;
   #define taskq_init_ent(x)
   #endif /* _STANDALONE */
   
   #endif  /* _SYS_TASKQ_H */

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