pthread_internal.h revision 4cf13952175a793fed4646d7d7396364874b0909 
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    void*                       return_value;
46    int                         internal_flags;
47    __pthread_cleanup_t*        cleanup_stack;
48    void**                      tls;         /* thread-local storage area */
49
50    void* alternate_signal_stack;
51
52    /*
53     * The dynamic linker implements dlerror(3), which makes it hard for us to implement this
54     * per-thread buffer by simply using malloc(3) and free(3).
55     */
56#define __BIONIC_DLERROR_BUFFER_SIZE 512
57    char dlerror_buffer[__BIONIC_DLERROR_BUFFER_SIZE];
58} pthread_internal_t;
59
60int _init_thread(pthread_internal_t* thread, bool add_to_thread_list);
61void __init_tls(pthread_internal_t* thread);
62void _pthread_internal_add(pthread_internal_t* thread);
63pthread_internal_t* __get_thread(void);
64
65__LIBC_HIDDEN__ void pthread_key_clean_all(void);
66__LIBC_HIDDEN__ void _pthread_internal_remove_locked(pthread_internal_t* thread);
67
68/* Has the thread been detached by a pthread_join or pthread_detach call? */
69#define PTHREAD_ATTR_FLAG_DETACHED      0x00000001
70
71/* Was the thread's stack allocated by the user rather than by us? */
72#define PTHREAD_ATTR_FLAG_USER_STACK    0x00000002
73
74/* Has the thread been joined by another thread? */
75#define PTHREAD_ATTR_FLAG_JOINED        0x00000004
76
77/* Has the thread already exited but not been joined? */
78#define PTHREAD_ATTR_FLAG_ZOMBIE        0x00000008
79
80__LIBC_HIDDEN__ extern pthread_internal_t* gThreadList;
81__LIBC_HIDDEN__ extern pthread_mutex_t gThreadListLock;
82
83/* needed by fork.c */
84extern void __timer_table_start_stop(int  stop);
85extern void __bionic_atfork_run_prepare();
86extern void __bionic_atfork_run_child();
87extern void __bionic_atfork_run_parent();
88
89__END_DECLS
90
91#endif /* _PTHREAD_INTERNAL_H_ */
92