pthread_internal.h revision d0c884d3595ecca03c3e70de9909c090cd5f9cae 
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
33__BEGIN_DECLS
34
35typedef struct pthread_internal_t
36{
37    struct pthread_internal_t*  next;
38    struct pthread_internal_t** pref;
39    pthread_attr_t              attr;
40    pid_t                       kernel_id;
41    pthread_cond_t              join_cond;
42    int                         join_count;
43    void*                       return_value;
44    int                         internal_flags;
45    __pthread_cleanup_t*        cleanup_stack;
46    void**                      tls;         /* thread-local storage area */
47} pthread_internal_t;
48
49extern int _init_thread(pthread_internal_t * thread, pid_t kernel_id, pthread_attr_t * attr, void * stack_base);
50
51/* needed by posix-timers.c */
52
53static __inline__ void timespec_add( struct timespec*  a, const struct timespec*  b )
54{
55    a->tv_sec  += b->tv_sec;
56    a->tv_nsec += b->tv_nsec;
57    if (a->tv_nsec >= 1000000000) {
58        a->tv_nsec -= 1000000000;
59        a->tv_sec  += 1;
60    }
61}
62
63static  __inline__ void timespec_sub( struct timespec*  a, const struct timespec*  b )
64{
65    a->tv_sec  -= b->tv_sec;
66    a->tv_nsec -= b->tv_nsec;
67    if (a->tv_nsec < 0) {
68        a->tv_nsec += 1000000000;
69        a->tv_sec  -= 1;
70    }
71}
72
73static  __inline__ void timespec_zero( struct timespec*  a )
74{
75    a->tv_sec = a->tv_nsec = 0;
76}
77
78static  __inline__ int timespec_is_zero( const struct timespec*  a )
79{
80    return (a->tv_sec == 0 && a->tv_nsec == 0);
81}
82
83static  __inline__ int timespec_cmp( const struct timespec*  a, const struct timespec*  b )
84{
85    if (a->tv_sec  < b->tv_sec)  return -1;
86    if (a->tv_sec  > b->tv_sec)  return +1;
87    if (a->tv_nsec < b->tv_nsec) return -1;
88    if (a->tv_nsec > b->tv_nsec) return +1;
89    return 0;
90}
91
92static  __inline__ int timespec_cmp0( const struct timespec*  a )
93{
94    if (a->tv_sec < 0) return -1;
95    if (a->tv_sec > 0) return +1;
96    if (a->tv_nsec < 0) return -1;
97    if (a->tv_nsec > 0) return +1;
98    return 0;
99}
100
101extern int  __pthread_cond_timedwait(pthread_cond_t*,
102                                     pthread_mutex_t*,
103                                     const struct timespec*,
104                                     clockid_t);
105
106extern int  __pthread_cond_timedwait_relative(pthread_cond_t*,
107                                              pthread_mutex_t*,
108                                              const struct timespec*);
109
110/* needed by fork.c */
111extern void __timer_table_start_stop(int  stop);
112extern void __bionic_atfork_run_prepare();
113extern void __bionic_atfork_run_child();
114extern void __bionic_atfork_run_parent();
115
116__END_DECLS
117
118#endif /* _PTHREAD_INTERNAL_H_ */
119