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      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 
     37 typedef 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 
     60 int _init_thread(pthread_internal_t* thread, bool add_to_thread_list);
     61 void __init_tls(pthread_internal_t* thread);
     62 void _pthread_internal_add(pthread_internal_t* thread);
     63 pthread_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 */
     84 extern void __timer_table_start_stop(int  stop);
     85 extern void __bionic_atfork_run_prepare();
     86 extern void __bionic_atfork_run_child();
     87 extern void __bionic_atfork_run_parent();
     88 
     89 __END_DECLS
     90 
     91 #endif /* _PTHREAD_INTERNAL_H_ */
     92