kern_kthread.c (52140) | kern_kthread.c (55539) |
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1/* 2 * Copyright (c) 1999 Peter Wemm <peter@FreeBSD.org> 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 unchanged lines hidden (view full) --- 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * | 1/* 2 * Copyright (c) 1999 Peter Wemm <peter@FreeBSD.org> 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 unchanged lines hidden (view full) --- 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * |
26 * $FreeBSD: head/sys/kern/kern_kthread.c 52140 1999-10-11 20:33:17Z luoqi $ | 26 * $FreeBSD: head/sys/kern/kern_kthread.c 55539 2000-01-07 08:36:44Z luoqi $ |
27 */ 28 29#include <sys/param.h> 30#include <sys/systm.h> 31#include <sys/proc.h> 32#include <sys/kthread.h> | 27 */ 28 29#include <sys/param.h> 30#include <sys/systm.h> 31#include <sys/proc.h> 32#include <sys/kthread.h> |
33#include <sys/signalvar.h> |
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33#include <sys/unistd.h> 34#include <sys/wait.h> 35 36#include <machine/stdarg.h> 37 38/* 39 * Start a kernel process. This is called after a fork() call in 40 * mi_startup() in the file kern/init_main.c. --- 51 unchanged lines hidden (view full) --- 92} 93 94void 95kthread_exit(int ecode) 96{ 97 exit1(curproc, W_EXITCODE(ecode, 0)); 98} 99 | 34#include <sys/unistd.h> 35#include <sys/wait.h> 36 37#include <machine/stdarg.h> 38 39/* 40 * Start a kernel process. This is called after a fork() call in 41 * mi_startup() in the file kern/init_main.c. --- 51 unchanged lines hidden (view full) --- 93} 94 95void 96kthread_exit(int ecode) 97{ 98 exit1(curproc, W_EXITCODE(ecode, 0)); 99} 100 |
101/* 102 * Advise a kernel process to suspend (or resume) in its main loop. 103 * Participation is voluntary. 104 */ 105int 106suspend_kproc(struct proc *p, int timo) 107{ 108 /* 109 * Make sure this is indeed a system process and we can safely 110 * use the p_siglist field. 111 */ 112 if ((p->p_flag & P_SYSTEM) == 0) 113 return (EINVAL); 114 SIGADDSET(p->p_siglist, SIGSTOP); 115 return tsleep((caddr_t)&p->p_siglist, PPAUSE, "suspkp", timo); 116} 117 118int 119resume_kproc(struct proc *p) 120{ 121 /* 122 * Make sure this is indeed a system process and we can safely 123 * use the p_siglist field. 124 */ 125 if ((p->p_flag & P_SYSTEM) == 0) 126 return (EINVAL); 127 SIGDELSET(p->p_siglist, SIGSTOP); 128 wakeup((caddr_t)&p->p_siglist); 129 return (0); 130} 131 132void 133kproc_suspend_loop(struct proc *p) 134{ 135 while (SIGISMEMBER(p->p_siglist, SIGSTOP)) { 136 wakeup((caddr_t)&p->p_siglist); 137 tsleep((caddr_t)&p->p_siglist, PPAUSE, "kpsusp", 0); 138 } 139} |
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