pthread_internal.h revision 6f94de3ca49e4ea147b1c59e5818fa175846518f 
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
36typedef 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                       kernel_id;
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
58int _init_thread(pthread_internal_t* thread, pid_t kernel_id, const pthread_attr_t* attr,
59                 void* stack_base, bool add_to_thread_list);
60void _pthread_internal_add( pthread_internal_t*  thread );
61pthread_internal_t* __get_thread(void);
62
63__LIBC_HIDDEN__ void pthread_key_clean_all(void);
64
65extern pthread_internal_t* gThreadList;
66extern pthread_mutex_t gThreadListLock;
67
68/* needed by posix-timers.c */
69
70static __inline__ void timespec_add( struct timespec*  a, const struct timespec*  b )
71{
72    a->tv_sec  += b->tv_sec;
73    a->tv_nsec += b->tv_nsec;
74    if (a->tv_nsec >= 1000000000) {
75        a->tv_nsec -= 1000000000;
76        a->tv_sec  += 1;
77    }
78}
79
80static  __inline__ void timespec_sub( struct timespec*  a, const struct timespec*  b )
81{
82    a->tv_sec  -= b->tv_sec;
83    a->tv_nsec -= b->tv_nsec;
84    if (a->tv_nsec < 0) {
85        a->tv_nsec += 1000000000;
86        a->tv_sec  -= 1;
87    }
88}
89
90static  __inline__ void timespec_zero( struct timespec*  a )
91{
92    a->tv_sec = a->tv_nsec = 0;
93}
94
95static  __inline__ int timespec_is_zero( const struct timespec*  a )
96{
97    return (a->tv_sec == 0 && a->tv_nsec == 0);
98}
99
100static  __inline__ int timespec_cmp( const struct timespec*  a, const struct timespec*  b )
101{
102    if (a->tv_sec  < b->tv_sec)  return -1;
103    if (a->tv_sec  > b->tv_sec)  return +1;
104    if (a->tv_nsec < b->tv_nsec) return -1;
105    if (a->tv_nsec > b->tv_nsec) return +1;
106    return 0;
107}
108
109static  __inline__ int timespec_cmp0( const struct timespec*  a )
110{
111    if (a->tv_sec < 0) return -1;
112    if (a->tv_sec > 0) return +1;
113    if (a->tv_nsec < 0) return -1;
114    if (a->tv_nsec > 0) return +1;
115    return 0;
116}
117
118extern int  __pthread_cond_timedwait(pthread_cond_t*,
119                                     pthread_mutex_t*,
120                                     const struct timespec*,
121                                     clockid_t);
122
123extern int  __pthread_cond_timedwait_relative(pthread_cond_t*,
124                                              pthread_mutex_t*,
125                                              const struct timespec*);
126
127/* needed by fork.c */
128extern void __timer_table_start_stop(int  stop);
129extern void __bionic_atfork_run_prepare();
130extern void __bionic_atfork_run_child();
131extern void __bionic_atfork_run_parent();
132
133__END_DECLS
134
135#endif /* _PTHREAD_INTERNAL_H_ */
136