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 #ifndef _PTHREAD_INTERNAL_H_
29 #define _PTHREAD_INTERNAL_H_
30
31 #include <pthread.h>
32 #include <stdbool.h>
33
34 __BEGIN_DECLS
35
36 typedef struct pthread_internal_t
37 {
38 struct pthread_internal_t* next;
39 struct pthread_internal_t* prev;
40 pthread_attr_t attr;
41 pid_t tid;
42 bool allocated_on_heap;
43 pthread_cond_t join_cond;
44 int join_count;
45 void* return_value;
46 int internal_flags;
47 __pthread_cleanup_t* cleanup_stack;
48 void** tls; /* thread-local storage area */
49
50 /*
51 * The dynamic linker implements dlerror(3), which makes it hard for us to implement this
52 * per-thread buffer by simply using malloc(3) and free(3).
53 */
54 #define __BIONIC_DLERROR_BUFFER_SIZE 512
55 char dlerror_buffer[__BIONIC_DLERROR_BUFFER_SIZE];
56 } pthread_internal_t;
57
58 int _init_thread(pthread_internal_t* thread, bool add_to_thread_list);
59 void __init_tls(pthread_internal_t* thread);
60 void _pthread_internal_add(pthread_internal_t* thread);
61 pthread_internal_t* __get_thread(void);
62
63 __LIBC_HIDDEN__ void pthread_key_clean_all(void);
64 __LIBC_HIDDEN__ void _pthread_internal_remove_locked(pthread_internal_t* thread);
65
66 #define PTHREAD_ATTR_FLAG_DETACHED 0x00000001
67 #define PTHREAD_ATTR_FLAG_USER_STACK 0x00000002
68
69 __LIBC_HIDDEN__ extern pthread_internal_t* gThreadList;
70 __LIBC_HIDDEN__ extern pthread_mutex_t gThreadListLock;
71
72 /* needed by posix-timers.c */
73
timespec_add(struct timespec * a,const struct timespec * b)74 static __inline__ void timespec_add( struct timespec* a, const struct timespec* b )
75 {
76 a->tv_sec += b->tv_sec;
77 a->tv_nsec += b->tv_nsec;
78 if (a->tv_nsec >= 1000000000) {
79 a->tv_nsec -= 1000000000;
80 a->tv_sec += 1;
81 }
82 }
83
timespec_sub(struct timespec * a,const struct timespec * b)84 static __inline__ void timespec_sub( struct timespec* a, const struct timespec* b )
85 {
86 a->tv_sec -= b->tv_sec;
87 a->tv_nsec -= b->tv_nsec;
88 if (a->tv_nsec < 0) {
89 a->tv_nsec += 1000000000;
90 a->tv_sec -= 1;
91 }
92 }
93
timespec_zero(struct timespec * a)94 static __inline__ void timespec_zero( struct timespec* a )
95 {
96 a->tv_sec = a->tv_nsec = 0;
97 }
98
timespec_is_zero(const struct timespec * a)99 static __inline__ int timespec_is_zero( const struct timespec* a )
100 {
101 return (a->tv_sec == 0 && a->tv_nsec == 0);
102 }
103
timespec_cmp(const struct timespec * a,const struct timespec * b)104 static __inline__ int timespec_cmp( const struct timespec* a, const struct timespec* b )
105 {
106 if (a->tv_sec < b->tv_sec) return -1;
107 if (a->tv_sec > b->tv_sec) return +1;
108 if (a->tv_nsec < b->tv_nsec) return -1;
109 if (a->tv_nsec > b->tv_nsec) return +1;
110 return 0;
111 }
112
timespec_cmp0(const struct timespec * a)113 static __inline__ int timespec_cmp0( const struct timespec* a )
114 {
115 if (a->tv_sec < 0) return -1;
116 if (a->tv_sec > 0) return +1;
117 if (a->tv_nsec < 0) return -1;
118 if (a->tv_nsec > 0) return +1;
119 return 0;
120 }
121
122 extern int __pthread_cond_timedwait(pthread_cond_t*,
123 pthread_mutex_t*,
124 const struct timespec*,
125 clockid_t);
126
127 extern int __pthread_cond_timedwait_relative(pthread_cond_t*,
128 pthread_mutex_t*,
129 const struct timespec*);
130
131 /* needed by fork.c */
132 extern void __timer_table_start_stop(int stop);
133 extern void __bionic_atfork_run_prepare();
134 extern void __bionic_atfork_run_child();
135 extern void __bionic_atfork_run_parent();
136
137 __END_DECLS
138
139 #endif /* _PTHREAD_INTERNAL_H_ */
140