Annotation of src/lib/libpthread/pthread_attr.c, Revision 1.13
1.13 ! christos 1: /* $NetBSD: pthread_attr.c,v 1.12 2009/01/18 12:14:16 lukem Exp $ */
1.1 nathanw 2:
3: /*-
1.10 ad 4: * Copyright (c) 2001, 2002, 2003, 2008 The NetBSD Foundation, Inc.
1.1 nathanw 5: * All rights reserved.
6: *
7: * This code is derived from software contributed to The NetBSD Foundation
8: * by Nathan J. Williams.
9: *
10: * Redistribution and use in source and binary forms, with or without
11: * modification, are permitted provided that the following conditions
12: * are met:
13: * 1. Redistributions of source code must retain the above copyright
14: * notice, this list of conditions and the following disclaimer.
15: * 2. Redistributions in binary form must reproduce the above copyright
16: * notice, this list of conditions and the following disclaimer in the
17: * documentation and/or other materials provided with the distribution.
18: *
19: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29: * POSSIBILITY OF SUCH DAMAGE.
30: */
31:
32: #include <sys/cdefs.h>
1.13 ! christos 33: __RCSID("$NetBSD: pthread_attr.c,v 1.12 2009/01/18 12:14:16 lukem Exp $");
1.1 nathanw 34:
35: #include <errno.h>
36: #include <stdio.h>
37: #include <stdlib.h>
38: #include <string.h>
39: #include <unistd.h>
40:
41: #include "pthread.h"
42: #include "pthread_int.h"
43:
1.7 christos 44: static struct pthread_attr_private *pthread__attr_init_private(
45: pthread_attr_t *);
1.1 nathanw 46:
47: static struct pthread_attr_private *
48: pthread__attr_init_private(pthread_attr_t *attr)
49: {
50: struct pthread_attr_private *p;
51:
52: if ((p = attr->pta_private) != NULL)
53: return p;
54:
55: p = malloc(sizeof(*p));
56: if (p != NULL) {
57: memset(p, 0, sizeof(*p));
58: attr->pta_private = p;
1.10 ad 59: p->ptap_policy = SCHED_OTHER;
1.1 nathanw 60: }
61: return p;
62: }
63:
64:
65: int
66: pthread_attr_init(pthread_attr_t *attr)
67: {
68:
69: attr->pta_magic = PT_ATTR_MAGIC;
70: attr->pta_flags = 0;
71: attr->pta_private = NULL;
72:
73: return 0;
74: }
75:
76:
77: int
78: pthread_attr_destroy(pthread_attr_t *attr)
79: {
80: struct pthread_attr_private *p;
81:
82: if ((p = attr->pta_private) != NULL)
83: free(p);
84:
85: return 0;
86: }
87:
88:
89: int
90: pthread_attr_get_np(pthread_t thread, pthread_attr_t *attr)
91: {
92: struct pthread_attr_private *p;
93:
94: p = pthread__attr_init_private(attr);
95: if (p == NULL)
96: return ENOMEM;
97:
98: attr->pta_flags = thread->pt_flags &
99: (PT_FLAG_DETACHED | PT_FLAG_SCOPE_SYSTEM | PT_FLAG_EXPLICIT_SCHED);
100:
101: p->ptap_namearg = thread->pt_name;
102: p->ptap_stackaddr = thread->pt_stack.ss_sp;
103: p->ptap_stacksize = thread->pt_stack.ss_size;
104: p->ptap_guardsize = (size_t)sysconf(_SC_PAGESIZE);
1.10 ad 105: return pthread_getschedparam(thread, &p->ptap_policy, &p->ptap_sp);
1.1 nathanw 106: }
107:
108:
109: int
110: pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate)
111: {
112:
113: if (attr->pta_flags & PT_FLAG_DETACHED)
114: *detachstate = PTHREAD_CREATE_DETACHED;
115: else
116: *detachstate = PTHREAD_CREATE_JOINABLE;
117:
118: return 0;
119: }
120:
121:
122: int
123: pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate)
124: {
125:
126: switch (detachstate) {
127: case PTHREAD_CREATE_JOINABLE:
128: attr->pta_flags &= ~PT_FLAG_DETACHED;
129: break;
130: case PTHREAD_CREATE_DETACHED:
131: attr->pta_flags |= PT_FLAG_DETACHED;
132: break;
133: default:
134: return EINVAL;
135: }
136:
137: return 0;
138: }
139:
140:
141: int
142: pthread_attr_getguardsize(const pthread_attr_t *attr, size_t *guard)
143: {
144: struct pthread_attr_private *p;
145:
146: if ((p = attr->pta_private) == NULL)
147: *guard = (size_t)sysconf(_SC_PAGESIZE);
148: else
149: *guard = p->ptap_guardsize;
150:
151: return 0;
152: }
153:
154:
155: int
156: pthread_attr_setguardsize(pthread_attr_t *attr, size_t guard)
157: {
158: struct pthread_attr_private *p;
159:
160: p = pthread__attr_init_private(attr);
161: if (p == NULL)
162: return ENOMEM;
163:
164: p->ptap_guardsize = guard;
165:
166: return 0;
167: }
168:
169:
170: int
171: pthread_attr_getinheritsched(const pthread_attr_t *attr, int *inherit)
172: {
173:
174: if (attr->pta_flags & PT_FLAG_EXPLICIT_SCHED)
175: *inherit = PTHREAD_EXPLICIT_SCHED;
176: else
177: *inherit = PTHREAD_INHERIT_SCHED;
178:
179: return 0;
180: }
181:
182:
183: int
184: pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit)
185: {
186:
187: switch (inherit) {
188: case PTHREAD_INHERIT_SCHED:
189: attr->pta_flags &= ~PT_FLAG_EXPLICIT_SCHED;
190: break;
191: case PTHREAD_EXPLICIT_SCHED:
192: attr->pta_flags |= PT_FLAG_EXPLICIT_SCHED;
193: break;
194: default:
195: return EINVAL;
196: }
197:
198: return 0;
199: }
200:
201:
202: int
203: pthread_attr_getscope(const pthread_attr_t *attr, int *scope)
204: {
205:
206: if (attr->pta_flags & PT_FLAG_SCOPE_SYSTEM)
207: *scope = PTHREAD_SCOPE_SYSTEM;
208: else
209: *scope = PTHREAD_SCOPE_PROCESS;
210:
211: return 0;
212: }
213:
214:
215: int
216: pthread_attr_setscope(pthread_attr_t *attr, int scope)
217: {
218:
219: switch (scope) {
220: case PTHREAD_SCOPE_PROCESS:
221: attr->pta_flags &= ~PT_FLAG_SCOPE_SYSTEM;
222: break;
223: case PTHREAD_SCOPE_SYSTEM:
224: attr->pta_flags |= PT_FLAG_SCOPE_SYSTEM;
225: break;
226: default:
227: return EINVAL;
228: }
229:
230: return 0;
231: }
232:
233:
234: int
235: pthread_attr_setschedparam(pthread_attr_t *attr,
1.10 ad 236: const struct sched_param *param)
1.1 nathanw 237: {
1.10 ad 238: struct pthread_attr_private *p;
239: int error;
1.1 nathanw 240:
241: if (param == NULL)
242: return EINVAL;
1.10 ad 243: p = pthread__attr_init_private(attr);
244: if (p == NULL)
245: return ENOMEM;
246: error = pthread__checkpri(param->sched_priority);
247: if (error == 0)
248: p->ptap_sp = *param;
249: return error;
1.1 nathanw 250: }
251:
252:
253: int
254: pthread_attr_getschedparam(const pthread_attr_t *attr,
1.10 ad 255: struct sched_param *param)
1.1 nathanw 256: {
1.10 ad 257: struct pthread_attr_private *p;
1.1 nathanw 258:
259: if (param == NULL)
260: return EINVAL;
1.10 ad 261: p = attr->pta_private;
262: if (p == NULL)
1.11 ad 263: memset(param, 0, sizeof(*param));
264: else
265: *param = p->ptap_sp;
1.1 nathanw 266: return 0;
267: }
268:
269:
270: int
1.10 ad 271: pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
1.4 nathanw 272: {
1.10 ad 273: struct pthread_attr_private *p;
274:
1.4 nathanw 275:
1.10 ad 276: switch (policy) {
277: case SCHED_OTHER:
278: case SCHED_FIFO:
279: case SCHED_RR:
280: p = pthread__attr_init_private(attr);
281: if (p == NULL)
282: return ENOMEM;
283: p->ptap_policy = policy;
284: return 0;
285: default:
1.4 nathanw 286: return ENOTSUP;
1.10 ad 287: }
1.4 nathanw 288: }
289:
290:
291: int
1.10 ad 292: pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy)
1.4 nathanw 293: {
1.10 ad 294: struct pthread_attr_private *p;
1.4 nathanw 295:
1.10 ad 296: p = attr->pta_private;
297: if (p == NULL) {
298: *policy = SCHED_OTHER;
299: return 0;
300: }
301: *policy = p->ptap_policy;
1.4 nathanw 302: return 0;
303: }
304:
305:
306: int
1.1 nathanw 307: pthread_attr_getstack(const pthread_attr_t *attr, void **addr, size_t *size)
308: {
309: struct pthread_attr_private *p;
310:
311: if ((p = attr->pta_private) == NULL) {
312: *addr = NULL;
1.6 ad 313: *size = pthread__stacksize;
1.1 nathanw 314: } else {
315: *addr = p->ptap_stackaddr;
316: *size = p->ptap_stacksize;
317: }
318:
319: return 0;
320: }
321:
322:
323: int
324: pthread_attr_setstack(pthread_attr_t *attr, void *addr, size_t size)
325: {
326: struct pthread_attr_private *p;
327:
328: p = pthread__attr_init_private(attr);
329: if (p == NULL)
330: return ENOMEM;
331:
332: p->ptap_stackaddr = addr;
333: p->ptap_stacksize = size;
334:
335: return 0;
336: }
337:
338:
339: int
340: pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *size)
341: {
342: struct pthread_attr_private *p;
343:
344: if ((p = attr->pta_private) == NULL)
1.6 ad 345: *size = pthread__stacksize;
1.1 nathanw 346: else
347: *size = p->ptap_stacksize;
348:
349: return 0;
350: }
351:
352:
353: int
354: pthread_attr_setstacksize(pthread_attr_t *attr, size_t size)
355: {
356: struct pthread_attr_private *p;
357:
1.12 lukem 358: if (size < (size_t)sysconf(_SC_THREAD_STACK_MIN))
1.9 ad 359: return EINVAL;
360:
1.1 nathanw 361: p = pthread__attr_init_private(attr);
362: if (p == NULL)
363: return ENOMEM;
364:
365: p->ptap_stacksize = size;
366:
367: return 0;
368: }
369:
370:
371: int
372: pthread_attr_getstackaddr(const pthread_attr_t *attr, void **addr)
373: {
374: struct pthread_attr_private *p;
375:
376: if ((p = attr->pta_private) == NULL)
377: *addr = NULL;
378: else
379: *addr = p->ptap_stackaddr;
380:
381: return 0;
382: }
383:
384:
385: int
386: pthread_attr_setstackaddr(pthread_attr_t *attr, void *addr)
387: {
388: struct pthread_attr_private *p;
389:
390: p = pthread__attr_init_private(attr);
391: if (p == NULL)
392: return ENOMEM;
393:
394: p->ptap_stackaddr = addr;
395:
396: return 0;
397: }
398:
399:
400: int
401: pthread_attr_getname_np(const pthread_attr_t *attr, char *name, size_t len,
402: void **argp)
403: {
404: struct pthread_attr_private *p;
405:
406: if ((p = attr->pta_private) == NULL) {
407: name[0] = '\0';
408: if (argp != NULL)
409: *argp = NULL;
410: } else {
411: strlcpy(name, p->ptap_name, len);
412: if (argp != NULL)
413: *argp = p->ptap_namearg;
414: }
415:
416: return 0;
417: }
418:
419:
420: int
421: pthread_attr_setname_np(pthread_attr_t *attr, const char *name, void *arg)
422: {
423: struct pthread_attr_private *p;
424: int namelen;
425:
426: p = pthread__attr_init_private(attr);
427: if (p == NULL)
428: return ENOMEM;
429:
430: namelen = snprintf(p->ptap_name, PTHREAD_MAX_NAMELEN_NP, name, arg);
431: if (namelen >= PTHREAD_MAX_NAMELEN_NP) {
432: p->ptap_name[0] = '\0';
433: return EINVAL;
434: }
435: p->ptap_namearg = arg;
436:
1.3 christos 437: return 0;
438: }
439:
440: int
441: pthread_attr_setcreatesuspend_np(pthread_attr_t *attr)
442: {
443: attr->pta_flags |= PT_FLAG_SUSPENDED;
1.1 nathanw 444: return 0;
445: }
1.13 ! christos 446:
! 447: int
! 448: pthread_getattr_np(pthread_t thread, pthread_attr_t *attr)
! 449: {
! 450: int error;
! 451: if ((error = pthread_attr_init(attr)) != 0)
! 452: return error;
! 453: if ((error = pthread_attr_get_np(thread, attr)) != 0) {
! 454: (void)pthread_attr_destroy(attr);
! 455: return error;
! 456: }
! 457: return 0;
! 458: }
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