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 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 #ifndef _SYS_MACHLOCK_H
27 #define _SYS_MACHLOCK_H
28
29 #pragma ident "%Z%%M% %I% %E% SMI"
30
31 #ifndef _ASM
32 #include <sys/types.h>
33 #include <sys/time.h>
34 #endif /* _ASM */
35
36 #ifdef __cplusplus
37 extern "C" {
38 #endif
39
40 #ifndef _ASM
41
42 #ifdef _KERNEL
43
44 extern void lock_set(lock_t *lp);
45 extern int lock_try(lock_t *lp);
46 extern int lock_spin_try(lock_t *lp);
47 extern int ulock_try(lock_t *lp);
48 extern void lock_clear(lock_t *lp);
49 extern void ulock_clear(lock_t *lp);
50 extern void lock_set_spl(lock_t *lp, int new_pil, ushort_t *old_pil);
59
60 typedef lock_t disp_lock_t; /* dispatcher lock type */
61
62 /*
63 * SPIN_LOCK() macro indicates whether lock is implemented as a spin lock or
64 * an adaptive mutex, depending on what interrupt levels use it.
65 */
66 #define SPIN_LOCK(pl) ((pl) > ipltospl(LOCK_LEVEL))
67
68 /*
69 * Macro to control loops which spin on a lock and then check state
70 * periodically. Its passed an integer, and returns a boolean value
71 * that if true indicates its a good time to get the scheduler lock and
72 * check the state of the current owner of the lock.
73 */
74 #define LOCK_SAMPLE_INTERVAL(i) (((i) & 0xff) == 0)
75
76 /*
77 * Externs for CLOCK_LOCK and clock resolution
78 */
79 extern volatile int hres_lock;
80 extern hrtime_t hrtime_base;
81 extern int clock_res;
82
83 #endif /* _ASM */
84
85 /*
86 * The definitions of the symbolic interrupt levels:
87 *
88 * CLOCK_LEVEL => The level at which one must be to block the clock.
89 *
90 * LOCK_LEVEL => The highest level at which one may block (and thus the
91 * highest level at which one may acquire adaptive locks)
92 * Also the highest level at which one may be preempted.
93 *
94 * DISP_LEVEL => The level at which one must be to perform dispatcher
95 * operations.
96 *
97 * The constraints on the platform:
98 *
99 * - CLOCK_LEVEL must be less than or equal to LOCK_LEVEL
|
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 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 * Copyright 2016 Joyent, Inc.
25 */
26
27 #ifndef _SYS_MACHLOCK_H
28 #define _SYS_MACHLOCK_H
29
30 #ifndef _ASM
31 #include <sys/types.h>
32 #include <sys/time.h>
33 #endif /* _ASM */
34
35 #ifdef __cplusplus
36 extern "C" {
37 #endif
38
39 #ifndef _ASM
40
41 #ifdef _KERNEL
42
43 extern void lock_set(lock_t *lp);
44 extern int lock_try(lock_t *lp);
45 extern int lock_spin_try(lock_t *lp);
46 extern int ulock_try(lock_t *lp);
47 extern void lock_clear(lock_t *lp);
48 extern void ulock_clear(lock_t *lp);
49 extern void lock_set_spl(lock_t *lp, int new_pil, ushort_t *old_pil);
58
59 typedef lock_t disp_lock_t; /* dispatcher lock type */
60
61 /*
62 * SPIN_LOCK() macro indicates whether lock is implemented as a spin lock or
63 * an adaptive mutex, depending on what interrupt levels use it.
64 */
65 #define SPIN_LOCK(pl) ((pl) > ipltospl(LOCK_LEVEL))
66
67 /*
68 * Macro to control loops which spin on a lock and then check state
69 * periodically. Its passed an integer, and returns a boolean value
70 * that if true indicates its a good time to get the scheduler lock and
71 * check the state of the current owner of the lock.
72 */
73 #define LOCK_SAMPLE_INTERVAL(i) (((i) & 0xff) == 0)
74
75 /*
76 * Externs for CLOCK_LOCK and clock resolution
77 */
78 extern volatile uint32_t hres_lock;
79 extern hrtime_t hrtime_base;
80 extern int clock_res;
81
82 #endif /* _ASM */
83
84 /*
85 * The definitions of the symbolic interrupt levels:
86 *
87 * CLOCK_LEVEL => The level at which one must be to block the clock.
88 *
89 * LOCK_LEVEL => The highest level at which one may block (and thus the
90 * highest level at which one may acquire adaptive locks)
91 * Also the highest level at which one may be preempted.
92 *
93 * DISP_LEVEL => The level at which one must be to perform dispatcher
94 * operations.
95 *
96 * The constraints on the platform:
97 *
98 * - CLOCK_LEVEL must be less than or equal to LOCK_LEVEL
|