sys/dev/drm/include/linux/sched.h

   1 /*-
   2  * Copyright (c) 2015-2017 François Tigeot
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice unmodified, this list of conditions, and the following
  10  *    disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #ifndef _LINUX_SCHED_H_
  28 #define _LINUX_SCHED_H_
  29
  30 #include <sys/param.h>
  31 #include <sys/systm.h>
  32 #include <sys/proc.h>
  33 #include <sys/sched.h>
  34 #include <sys/signal2.h>
  35
  36 #include <linux/time.h>
  37
  38 #define TASK_RUNNING            0
  39 #define TASK_INTERRUPTIBLE      1
  40 #define TASK_UNINTERRUPTIBLE    2
  41
  42 /*
  43  * schedule_timeout - sleep until timeout
  44  * @timeout: timeout value in jiffies
  45  */
  46 static inline long
  47 schedule_timeout(signed long timeout)
  48 {
  49         static int dummy;
  50
  51         if (timeout < 0) {
  52                 kprintf("schedule_timeout(): timeout cannot be negative\n");
  53                 return 0;
  54         }
  55
  56         tsleep(&dummy, 0, "lstim", timeout);
  57
  58         return 0;
  59 }
  60
  61 #define TASK_COMM_LEN   MAXCOMLEN
  62
  63 #define signal_pending(lp)      CURSIG(lp)
  64
  65 /*
  66  * local_clock: fast time source, monotonic on the same cpu
  67  */
  68 static inline uint64_t
  69 local_clock(void)
  70 {
  71         struct timespec ts;
  72
  73         getnanouptime(&ts);
  74         return (ts.tv_sec * NSEC_PER_SEC) + ts.tv_nsec;
  75 }
  76
  77 #endif  /* _LINUX_SCHED_H_ */