sched.h revision 1.5.18.2
1 1.5.18.2 pgoyette /* $NetBSD: sched.h,v 1.5.18.2 2018/11/26 01:52:49 pgoyette Exp $ */ 2 1.2 riastrad 3 1.2 riastrad /*- 4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc. 5 1.2 riastrad * All rights reserved. 6 1.2 riastrad * 7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation 8 1.2 riastrad * by Taylor R. Campbell. 9 1.2 riastrad * 10 1.2 riastrad * Redistribution and use in source and binary forms, with or without 11 1.2 riastrad * modification, are permitted provided that the following conditions 12 1.2 riastrad * are met: 13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright 14 1.2 riastrad * notice, this list of conditions and the following disclaimer. 15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright 16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the 17 1.2 riastrad * documentation and/or other materials provided with the distribution. 18 1.2 riastrad * 19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE. 30 1.2 riastrad */ 31 1.2 riastrad 32 1.2 riastrad #ifndef _LINUX_SCHED_H_ 33 1.2 riastrad #define _LINUX_SCHED_H_ 34 1.2 riastrad 35 1.3 riastrad #include <sys/param.h> 36 1.3 riastrad #include <sys/kernel.h> 37 1.2 riastrad #include <sys/proc.h> 38 1.2 riastrad 39 1.5.18.1 pgoyette #include <asm/param.h> 40 1.5.18.1 pgoyette #include <asm/barrier.h> 41 1.5.18.1 pgoyette #include <asm/processor.h> 42 1.5.18.1 pgoyette #include <linux/errno.h> 43 1.5.18.1 pgoyette 44 1.3 riastrad #define TASK_COMM_LEN MAXCOMLEN 45 1.3 riastrad 46 1.5.18.1 pgoyette #define MAX_SCHEDULE_TIMEOUT (INT_MAX/2) /* paranoia */ 47 1.5.18.1 pgoyette 48 1.2 riastrad #define current curproc 49 1.2 riastrad 50 1.2 riastrad static inline pid_t 51 1.2 riastrad task_pid_nr(struct proc *p) 52 1.2 riastrad { 53 1.2 riastrad return p->p_pid; 54 1.2 riastrad } 55 1.2 riastrad 56 1.3 riastrad static inline long 57 1.3 riastrad schedule_timeout_uninterruptible(long timeout) 58 1.3 riastrad { 59 1.5 nonaka long remain; 60 1.3 riastrad int start, end; 61 1.3 riastrad 62 1.4 nonaka if (cold) { 63 1.5.18.2 pgoyette unsigned us; 64 1.5.18.2 pgoyette if (hz <= 1000) { 65 1.5.18.2 pgoyette unsigned ms = hztoms(MIN(timeout, mstohz(INT_MAX))); 66 1.5.18.2 pgoyette us = MIN(ms, INT_MAX/1000)*1000; 67 1.5.18.2 pgoyette } else if (hz <= 1000000) { 68 1.5.18.2 pgoyette us = MIN(timeout, (INT_MAX/1000000)/hz)*hz*1000000; 69 1.5.18.2 pgoyette } else { 70 1.5.18.2 pgoyette us = timeout/(1000000/hz); 71 1.5.18.2 pgoyette } 72 1.5.18.2 pgoyette DELAY(us); 73 1.4 nonaka return 0; 74 1.4 nonaka } 75 1.4 nonaka 76 1.3 riastrad start = hardclock_ticks; 77 1.5.18.2 pgoyette /* Caller is expected to loop anyway, so no harm in truncating. */ 78 1.5.18.2 pgoyette (void)kpause("loonix", false /*!intr*/, MIN(timeout, INT_MAX), NULL); 79 1.3 riastrad end = hardclock_ticks; 80 1.3 riastrad 81 1.5 nonaka remain = timeout - (end - start); 82 1.5 nonaka return remain > 0 ? remain : 0; 83 1.3 riastrad } 84 1.3 riastrad 85 1.5.18.1 pgoyette static inline void 86 1.5.18.1 pgoyette cond_resched(void) 87 1.5.18.1 pgoyette { 88 1.5.18.1 pgoyette 89 1.5.18.1 pgoyette if (curcpu()->ci_schedstate.spc_flags & SPCF_SHOULDYIELD) 90 1.5.18.1 pgoyette preempt(); 91 1.5.18.1 pgoyette } 92 1.5.18.1 pgoyette 93 1.2 riastrad #endif /* _LINUX_SCHED_H_ */ 94
Indexes created Tue Sep 30 17:09:57 GMT 2025