1 /* $NetBSD: thread.c,v 1.1 2024/02/18 20:57:56 christos Exp $ */
2
3 /*
4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
5 *
6 * SPDX-License-Identifier: MPL-2.0
7 *
8 * This Source Code Form is subject to the terms of the Mozilla Public
9 * License, v. 2.0. If a copy of the MPL was not distributed with this
10 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
11 *
12 * See the COPYRIGHT file distributed with this work for additional
13 * information regarding copyright ownership.
14 */
15
16 /*! \file */
17
18 #if defined(HAVE_SCHED_H)
19 #include <sched.h>
20 #endif /* if defined(HAVE_SCHED_H) */
21
22 #if defined(HAVE_CPUSET_H)
23 #include <sys/cpuset.h>
24 #include <sys/param.h>
25 #endif /* if defined(HAVE_CPUSET_H) */
26
27 #if defined(HAVE_SYS_PROCSET_H)
28 #include <sys/processor.h>
29 #include <sys/procset.h>
30 #include <sys/types.h>
31 #endif /* if defined(HAVE_SYS_PROCSET_H) */
32
33 #include <isc/strerr.h>
34 #include <isc/thread.h>
35 #include <isc/util.h>
36
37 #include "trampoline_p.h"
38
39 #ifndef THREAD_MINSTACKSIZE
40 #define THREAD_MINSTACKSIZE (1024U * 1024)
41 #endif /* ifndef THREAD_MINSTACKSIZE */
42
43 #define _FATAL(r, f) \
44 { \
45 char strbuf[ISC_STRERRORSIZE]; \
46 strerror_r(r, strbuf, sizeof(strbuf)); \
47 isc_error_fatal(__FILE__, __LINE__, f " failed: %s", strbuf); \
48 }
49
50 void
isc_thread_create(isc_threadfunc_t func,isc_threadarg_t arg,isc_thread_t * thread)51 isc_thread_create(isc_threadfunc_t func, isc_threadarg_t arg,
52 isc_thread_t *thread) {
53 pthread_attr_t attr;
54 isc__trampoline_t *trampoline_arg;
55
56 trampoline_arg = isc__trampoline_get(func, arg);
57
58 #if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
59 defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
60 size_t stacksize;
61 #endif /* if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
62 * defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE) */
63 int ret;
64
65 pthread_attr_init(&attr);
66
67 #if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
68 defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE)
69 ret = pthread_attr_getstacksize(&attr, &stacksize);
70 if (ret != 0) {
71 _FATAL(ret, "pthread_attr_getstacksize()");
72 }
73
74 if (stacksize < THREAD_MINSTACKSIZE) {
75 ret = pthread_attr_setstacksize(&attr, THREAD_MINSTACKSIZE);
76 if (ret != 0) {
77 _FATAL(ret, "pthread_attr_setstacksize()");
78 }
79 }
80 #endif /* if defined(HAVE_PTHREAD_ATTR_GETSTACKSIZE) && \
81 * defined(HAVE_PTHREAD_ATTR_SETSTACKSIZE) */
82
83 ret = pthread_create(thread, &attr, isc__trampoline_run,
84 trampoline_arg);
85 if (ret != 0) {
86 _FATAL(ret, "pthread_create()");
87 }
88
89 pthread_attr_destroy(&attr);
90
91 return;
92 }
93
94 void
isc_thread_join(isc_thread_t thread,isc_threadresult_t * result)95 isc_thread_join(isc_thread_t thread, isc_threadresult_t *result) {
96 int ret = pthread_join(thread, result);
97 if (ret != 0) {
98 _FATAL(ret, "pthread_join()");
99 }
100 }
101
102 void
isc_thread_setname(isc_thread_t thread,const char * name)103 isc_thread_setname(isc_thread_t thread, const char *name) {
104 #if defined(HAVE_PTHREAD_SETNAME_NP) && !defined(__APPLE__)
105 /*
106 * macOS has pthread_setname_np but only works on the
107 * current thread so it's not used here
108 */
109 #if defined(__NetBSD__)
110 (void)pthread_setname_np(thread, name, NULL);
111 #else /* if defined(__NetBSD__) */
112 (void)pthread_setname_np(thread, name);
113 #endif /* if defined(__NetBSD__) */
114 #elif defined(HAVE_PTHREAD_SET_NAME_NP)
115 (void)pthread_set_name_np(thread, name);
116 #else /* if defined(HAVE_PTHREAD_SETNAME_NP) && !defined(__APPLE__) */
117 UNUSED(thread);
118 UNUSED(name);
119 #endif /* if defined(HAVE_PTHREAD_SETNAME_NP) && !defined(__APPLE__) */
120 }
121
122 void
isc_thread_yield(void)123 isc_thread_yield(void) {
124 #if defined(HAVE_SCHED_YIELD)
125 sched_yield();
126 #elif defined(HAVE_PTHREAD_YIELD)
127 pthread_yield();
128 #elif defined(HAVE_PTHREAD_YIELD_NP)
129 pthread_yield_np();
130 #endif /* if defined(HAVE_SCHED_YIELD) */
131 }
132