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1 /*
2  * Copyright (C) 2008 The Android Open Source Project
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  *  * Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  *  * Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in
12  *    the documentation and/or other materials provided with the
13  *    distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19  * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22  * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #include <pthread.h>
30 
31 #include "pthread_internal.h"
32 
33 #define DEFAULT_STACK_SIZE (1024 * 1024)
34 
pthread_attr_init(pthread_attr_t * attr)35 int pthread_attr_init(pthread_attr_t* attr) {
36   attr->flags = 0;
37   attr->stack_base = NULL;
38   attr->stack_size = DEFAULT_STACK_SIZE;
39   attr->guard_size = PAGE_SIZE;
40   attr->sched_policy = SCHED_NORMAL;
41   attr->sched_priority = 0;
42   return 0;
43 }
44 
pthread_attr_destroy(pthread_attr_t * attr)45 int pthread_attr_destroy(pthread_attr_t* attr) {
46   memset(attr, 0x42, sizeof(pthread_attr_t));
47   return 0;
48 }
49 
pthread_attr_setdetachstate(pthread_attr_t * attr,int state)50 int pthread_attr_setdetachstate(pthread_attr_t* attr, int state) {
51   if (state == PTHREAD_CREATE_DETACHED) {
52     attr->flags |= PTHREAD_ATTR_FLAG_DETACHED;
53   } else if (state == PTHREAD_CREATE_JOINABLE) {
54     attr->flags &= ~PTHREAD_ATTR_FLAG_DETACHED;
55   } else {
56     return EINVAL;
57   }
58   return 0;
59 }
60 
pthread_attr_getdetachstate(pthread_attr_t const * attr,int * state)61 int pthread_attr_getdetachstate(pthread_attr_t const* attr, int* state) {
62   *state = (attr->flags & PTHREAD_ATTR_FLAG_DETACHED) ? PTHREAD_CREATE_DETACHED : PTHREAD_CREATE_JOINABLE;
63   return 0;
64 }
65 
pthread_attr_setschedpolicy(pthread_attr_t * attr,int policy)66 int pthread_attr_setschedpolicy(pthread_attr_t* attr, int policy) {
67   attr->sched_policy = policy;
68   return 0;
69 }
70 
pthread_attr_getschedpolicy(pthread_attr_t const * attr,int * policy)71 int pthread_attr_getschedpolicy(pthread_attr_t const* attr, int* policy) {
72   *policy = attr->sched_policy;
73   return 0;
74 }
75 
pthread_attr_setschedparam(pthread_attr_t * attr,struct sched_param const * param)76 int pthread_attr_setschedparam(pthread_attr_t * attr, struct sched_param const* param) {
77   attr->sched_priority = param->sched_priority;
78   return 0;
79 }
80 
pthread_attr_getschedparam(pthread_attr_t const * attr,struct sched_param * param)81 int pthread_attr_getschedparam(pthread_attr_t const* attr, struct sched_param* param) {
82   param->sched_priority = attr->sched_priority;
83   return 0;
84 }
85 
pthread_attr_setstacksize(pthread_attr_t * attr,size_t stack_size)86 int pthread_attr_setstacksize(pthread_attr_t* attr, size_t stack_size) {
87   if ((stack_size & (PAGE_SIZE - 1) || stack_size < PTHREAD_STACK_MIN)) {
88     return EINVAL;
89   }
90   attr->stack_size = stack_size;
91   return 0;
92 }
93 
pthread_attr_getstacksize(pthread_attr_t const * attr,size_t * stack_size)94 int pthread_attr_getstacksize(pthread_attr_t const* attr, size_t* stack_size) {
95   *stack_size = attr->stack_size;
96   return 0;
97 }
98 
pthread_attr_setstackaddr(pthread_attr_t *,void *)99 int pthread_attr_setstackaddr(pthread_attr_t*, void*) {
100   // This was removed from POSIX.1-2008, and is not implemented on bionic.
101   // Needed for ABI compatibility with the NDK.
102   return ENOSYS;
103 }
104 
pthread_attr_getstackaddr(pthread_attr_t const * attr,void ** stack_addr)105 int pthread_attr_getstackaddr(pthread_attr_t const* attr, void** stack_addr) {
106   // This was removed from POSIX.1-2008.
107   // Needed for ABI compatibility with the NDK.
108   *stack_addr = (char*)attr->stack_base + attr->stack_size;
109   return 0;
110 }
111 
pthread_attr_setstack(pthread_attr_t * attr,void * stack_base,size_t stack_size)112 int pthread_attr_setstack(pthread_attr_t* attr, void* stack_base, size_t stack_size) {
113   if ((stack_size & (PAGE_SIZE - 1) || stack_size < PTHREAD_STACK_MIN)) {
114     return EINVAL;
115   }
116   if ((uint32_t)stack_base & (PAGE_SIZE - 1)) {
117     return EINVAL;
118   }
119   attr->stack_base = stack_base;
120   attr->stack_size = stack_size;
121   return 0;
122 }
123 
pthread_attr_getstack(pthread_attr_t const * attr,void ** stack_base,size_t * stack_size)124 int pthread_attr_getstack(pthread_attr_t const* attr, void** stack_base, size_t* stack_size) {
125   *stack_base = attr->stack_base;
126   *stack_size = attr->stack_size;
127   return 0;
128 }
129 
pthread_attr_setguardsize(pthread_attr_t * attr,size_t guard_size)130 int pthread_attr_setguardsize(pthread_attr_t* attr, size_t guard_size) {
131   if (guard_size & (PAGE_SIZE - 1) || guard_size < PAGE_SIZE) {
132     return EINVAL;
133   }
134   attr->guard_size = guard_size;
135   return 0;
136 }
137 
pthread_attr_getguardsize(pthread_attr_t const * attr,size_t * guard_size)138 int pthread_attr_getguardsize(pthread_attr_t const* attr, size_t* guard_size) {
139   *guard_size = attr->guard_size;
140   return 0;
141 }
142 
pthread_getattr_np(pthread_t thid,pthread_attr_t * attr)143 int pthread_getattr_np(pthread_t thid, pthread_attr_t* attr) {
144   pthread_internal_t* thread = (pthread_internal_t*) thid;
145   *attr = thread->attr;
146   return 0;
147 }
148 
pthread_attr_setscope(pthread_attr_t *,int scope)149 int pthread_attr_setscope(pthread_attr_t* , int scope) {
150   if (scope == PTHREAD_SCOPE_SYSTEM) {
151     return 0;
152   }
153   if (scope == PTHREAD_SCOPE_PROCESS) {
154     return ENOTSUP;
155   }
156   return EINVAL;
157 }
158 
pthread_attr_getscope(pthread_attr_t const *)159 int pthread_attr_getscope(pthread_attr_t const*) {
160   return PTHREAD_SCOPE_SYSTEM;
161 }
162