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_
31 #include <pthread.h>
33 struct pthread_internal_t {
34 struct pthread_internal_t* next;
35 struct pthread_internal_t* prev;
37 pid_t tid;
39 void** tls;
41 pthread_attr_t attr;
43 __pthread_cleanup_t* cleanup_stack;
45 void* (*start_routine)(void*);
46 void* start_routine_arg;
47 void* return_value;
49 void* alternate_signal_stack;
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 };
59 __LIBC_HIDDEN__ int __init_thread(pthread_internal_t* thread, bool add_to_thread_list);
60 __LIBC_HIDDEN__ void __init_tls(pthread_internal_t* thread);
61 __LIBC_HIDDEN__ void __init_alternate_signal_stack(pthread_internal_t*);
62 __LIBC_HIDDEN__ void _pthread_internal_add(pthread_internal_t* thread);
63 __LIBC_HIDDEN__ pthread_internal_t* __get_thread(void);
65 __LIBC_HIDDEN__ void pthread_key_clean_all(void);
66 __LIBC_HIDDEN__ void _pthread_internal_remove_locked(pthread_internal_t* thread);
68 /* Has the thread been detached by a pthread_join or pthread_detach call? */
69 #define PTHREAD_ATTR_FLAG_DETACHED 0x00000001
71 /* Was the thread's stack allocated by the user rather than by us? */
72 #define PTHREAD_ATTR_FLAG_USER_ALLOCATED_STACK 0x00000002
74 /* Has the thread been joined by another thread? */
75 #define PTHREAD_ATTR_FLAG_JOINED 0x00000004
77 /* Is this the main thread? */
78 #define PTHREAD_ATTR_FLAG_MAIN_THREAD 0x80000000
80 /*
81 * Traditionally we give threads a 1MiB stack. When we started
82 * allocating per-thread alternate signal stacks to ease debugging of
83 * stack overflows, we subtracted the same amount we were using there
84 * from the default thread stack size. This should keep memory usage
85 * roughly constant.
86 */
87 #define PTHREAD_STACK_SIZE_DEFAULT ((1 * 1024 * 1024) - SIGSTKSZ)
89 __LIBC_HIDDEN__ extern pthread_internal_t* gThreadList;
90 __LIBC_HIDDEN__ extern pthread_mutex_t gThreadListLock;
92 __LIBC_HIDDEN__ int __timespec_from_absolute(timespec*, const timespec*, clockid_t);
94 /* needed by fork.c */
95 __LIBC_HIDDEN__ extern void __timer_table_start_stop(int);
96 __LIBC_HIDDEN__ extern void __bionic_atfork_run_prepare();
97 __LIBC_HIDDEN__ extern void __bionic_atfork_run_child();
98 __LIBC_HIDDEN__ extern void __bionic_atfork_run_parent();
100 #endif /* _PTHREAD_INTERNAL_H_ */