102 lines
2.3 KiB
C
102 lines
2.3 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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* $FreeBSD$
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*/
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/*
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* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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void
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dtrace_vtime_enable(void)
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{
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dtrace_vtime_state_t state, nstate = 0;
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do {
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state = dtrace_vtime_active;
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switch (state) {
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case DTRACE_VTIME_INACTIVE:
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nstate = DTRACE_VTIME_ACTIVE;
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break;
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case DTRACE_VTIME_INACTIVE_TNF:
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nstate = DTRACE_VTIME_ACTIVE_TNF;
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break;
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case DTRACE_VTIME_ACTIVE:
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case DTRACE_VTIME_ACTIVE_TNF:
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panic("DTrace virtual time already enabled");
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/*NOTREACHED*/
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}
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} while (dtrace_cas32((uint32_t *)&dtrace_vtime_active,
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state, nstate) != state);
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}
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void
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dtrace_vtime_disable(void)
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{
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dtrace_vtime_state_t state, nstate = 0;
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do {
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state = dtrace_vtime_active;
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switch (state) {
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case DTRACE_VTIME_ACTIVE:
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nstate = DTRACE_VTIME_INACTIVE;
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break;
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case DTRACE_VTIME_ACTIVE_TNF:
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nstate = DTRACE_VTIME_INACTIVE_TNF;
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break;
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case DTRACE_VTIME_INACTIVE:
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case DTRACE_VTIME_INACTIVE_TNF:
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panic("DTrace virtual time already disabled");
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/*NOTREACHED*/
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}
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} while (dtrace_cas32((uint32_t *)&dtrace_vtime_active,
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state, nstate) != state);
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}
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void
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dtrace_vtime_switch(kthread_t *next)
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{
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dtrace_icookie_t cookie;
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hrtime_t ts;
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cookie = dtrace_interrupt_disable();
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ts = dtrace_gethrtime();
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if (curthread->t_dtrace_start != 0) {
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curthread->t_dtrace_vtime += ts - curthread->t_dtrace_start;
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curthread->t_dtrace_start = 0;
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}
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if (next != NULL)
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next->t_dtrace_start = ts;
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dtrace_interrupt_enable(cookie);
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}
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