pthread_internal.h revision 36fa67bcdd90f18a3c68f8637ae836762407fa51 
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#include <sys/cdefs.h>
34
35__BEGIN_DECLS
36
37typedef struct pthread_internal_t
38{
39    struct pthread_internal_t*  next;
40    struct pthread_internal_t*  prev;
41    pthread_attr_t              attr;
42    pid_t                       tid;
43    bool                        allocated_on_heap;
44    pthread_cond_t              join_cond;
45    int                         join_count;
46    void*                       return_value;
47    int                         internal_flags;
48    __pthread_cleanup_t*        cleanup_stack;
49    void**                      tls;         /* thread-local storage area */
50
51    /*
52     * The dynamic linker implements dlerror(3), which makes it hard for us to implement this
53     * per-thread buffer by simply using malloc(3) and free(3).
54     */
55#define __BIONIC_DLERROR_BUFFER_SIZE 512
56    char dlerror_buffer[__BIONIC_DLERROR_BUFFER_SIZE];
57} pthread_internal_t;
58
59int _init_thread(pthread_internal_t* thread, bool add_to_thread_list);
60void __init_tls(pthread_internal_t* thread);
61void _pthread_internal_add(pthread_internal_t* thread);
62pthread_internal_t* __get_thread(void);
63
64__LIBC_HIDDEN__ void pthread_key_clean_all(void);
65__LIBC_HIDDEN__ void _pthread_internal_remove_locked(pthread_internal_t* thread);
66
67#define PTHREAD_ATTR_FLAG_DETACHED      0x00000001
68#define PTHREAD_ATTR_FLAG_USER_STACK    0x00000002
69
70__LIBC_HIDDEN__ extern pthread_internal_t* gThreadList;
71__LIBC_HIDDEN__ extern pthread_mutex_t gThreadListLock;
72
73/* needed by posix-timers.c */
74
75static __inline__ void timespec_add( struct timespec*  a, const struct timespec*  b )
76{
77    a->tv_sec  += b->tv_sec;
78    a->tv_nsec += b->tv_nsec;
79    if (a->tv_nsec >= 1000000000) {
80        a->tv_nsec -= 1000000000;
81        a->tv_sec  += 1;
82    }
83}
84
85static  __inline__ void timespec_sub( struct timespec*  a, const struct timespec*  b )
86{
87    a->tv_sec  -= b->tv_sec;
88    a->tv_nsec -= b->tv_nsec;
89    if (a->tv_nsec < 0) {
90        a->tv_nsec += 1000000000;
91        a->tv_sec  -= 1;
92    }
93}
94
95static  __inline__ void timespec_zero( struct timespec*  a )
96{
97    a->tv_sec = a->tv_nsec = 0;
98}
99
100static  __inline__ int timespec_is_zero( const struct timespec*  a )
101{
102    return (a->tv_sec == 0 && a->tv_nsec == 0);
103}
104
105static  __inline__ int timespec_cmp( const struct timespec*  a, const struct timespec*  b )
106{
107    if (a->tv_sec  < b->tv_sec)  return -1;
108    if (a->tv_sec  > b->tv_sec)  return +1;
109    if (a->tv_nsec < b->tv_nsec) return -1;
110    if (a->tv_nsec > b->tv_nsec) return +1;
111    return 0;
112}
113
114static  __inline__ int timespec_cmp0( const struct timespec*  a )
115{
116    if (a->tv_sec < 0) return -1;
117    if (a->tv_sec > 0) return +1;
118    if (a->tv_nsec < 0) return -1;
119    if (a->tv_nsec > 0) return +1;
120    return 0;
121}
122
123extern int  __pthread_cond_timedwait(pthread_cond_t*,
124                                     pthread_mutex_t*,
125                                     const struct timespec*,
126                                     clockid_t);
127
128extern int  __pthread_cond_timedwait_relative(pthread_cond_t*,
129                                              pthread_mutex_t*,
130                                              const struct timespec*);
131
132/* needed by fork.c */
133extern void __timer_table_start_stop(int  stop);
134extern void __bionic_atfork_run_prepare();
135extern void __bionic_atfork_run_child();
136extern void __bionic_atfork_run_parent();
137
138__END_DECLS
139
140#endif /* _PTHREAD_INTERNAL_H_ */
141