1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * The enclosed is a private interface between system libraries and 29 * the kernel. It should not be used in any other way. It may be 30 * changed without notice in a minor release of Solaris. 31 */ 32 33 #ifndef _SYS_SCHEDCTL_H 34 #define _SYS_SCHEDCTL_H 35 36 #pragma ident "%Z%%M% %I% %E% SMI" 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 #if !defined(_ASM) 43 44 #include <sys/types.h> 45 #include <sys/processor.h> 46 47 /* 48 * This "public" portion of the sc_shared data is used by libsched/libc. 49 */ 50 typedef struct sc_public { 51 volatile short sc_nopreempt; 52 volatile short sc_yield; 53 } sc_public_t; 54 55 /* 56 * The private portion of the sc_shared data is for 57 * use by user-level threading support code in libc. 58 * Java has a contract to look at sc_state and sc_cpu (PSARC/2005/351). 59 */ 60 typedef struct sc_shared { 61 volatile ushort_t sc_state; /* current LWP state */ 62 volatile char sc_sigblock; /* all signals blocked */ 63 volatile uchar_t sc_flgs; /* set only by curthread; see below */ 64 volatile processorid_t sc_cpu; /* last CPU on which LWP ran */ 65 volatile char sc_cid; /* scheduling class id */ 66 volatile char sc_cpri; /* class priority, -128..127 */ 67 volatile uchar_t sc_priority; /* dispatch priority, 0..255 */ 68 char sc_pad; 69 sc_public_t sc_preemptctl; /* preemption control data */ 70 } sc_shared_t; 71 72 /* sc_flgs */ 73 #define SC_PARK_FLG 0x01 /* calling lwp_park() */ 74 #define SC_CANCEL_FLG 0x02 /* cancel pending and not disabled */ 75 #define SC_EINTR_FLG 0x04 /* EINTR returned due to SC_CANCEL_FLG */ 76 77 /* 78 * Possible state settings. These are same as the kernel thread states 79 * except there is no zombie state. 80 */ 81 #define SC_FREE 0x00 82 #define SC_SLEEP 0x01 83 #define SC_RUN 0x02 84 #define SC_ONPROC 0x04 85 #define SC_STOPPED 0x10 86 #define SC_WAIT 0x20 87 88 /* preemption control settings */ 89 #define SC_MAX_TICKS 2 /* max time preemption can be blocked */ 90 91 #ifdef _KERNEL 92 caddr_t schedctl(void); 93 void schedctl_init(void); 94 void schedctl_lwp_cleanup(kthread_t *); 95 void schedctl_proc_cleanup(void); 96 int schedctl_get_nopreempt(kthread_t *); 97 void schedctl_set_nopreempt(kthread_t *, short); 98 void schedctl_set_yield(kthread_t *, short); 99 void schedctl_set_cidpri(kthread_t *); 100 int schedctl_sigblock(kthread_t *); 101 void schedctl_finish_sigblock(kthread_t *); 102 int schedctl_cancel_pending(void); 103 void schedctl_cancel_eintr(void); 104 int schedctl_is_park(void); 105 void schedctl_set_park(void); 106 void schedctl_unpark(void); 107 #endif /* _KERNEL */ 108 109 #endif /* !defined(_ASM) */ 110 111 #ifdef __cplusplus 112 } 113 #endif 114 115 #endif /* _SYS_SCHEDCTL_H */ 116