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