pthread_internal.h revision 5419b9474753d25dff947c7740532f86d130c0be
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 36typedef 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 kernel_id; 42 pthread_cond_t join_cond; 43 int join_count; 44 void* return_value; 45 int internal_flags; 46 __pthread_cleanup_t* cleanup_stack; 47 void** tls; /* thread-local storage area */ 48 49 /* 50 * The dynamic linker implements dlerror(3), which makes it hard for us to implement this 51 * per-thread buffer by simply using malloc(3) and free(3). 52 */ 53#define __BIONIC_DLERROR_BUFFER_SIZE 512 54 char dlerror_buffer[__BIONIC_DLERROR_BUFFER_SIZE]; 55} pthread_internal_t; 56 57int _init_thread(pthread_internal_t* thread, pid_t kernel_id, pthread_attr_t* attr, 58 void* stack_base, bool add_to_thread_list); 59void _pthread_internal_add( pthread_internal_t* thread ); 60pthread_internal_t* __get_thread(void); 61 62/* needed by posix-timers.c */ 63 64static __inline__ void timespec_add( struct timespec* a, const struct timespec* b ) 65{ 66 a->tv_sec += b->tv_sec; 67 a->tv_nsec += b->tv_nsec; 68 if (a->tv_nsec >= 1000000000) { 69 a->tv_nsec -= 1000000000; 70 a->tv_sec += 1; 71 } 72} 73 74static __inline__ void timespec_sub( 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 < 0) { 79 a->tv_nsec += 1000000000; 80 a->tv_sec -= 1; 81 } 82} 83 84static __inline__ void timespec_zero( struct timespec* a ) 85{ 86 a->tv_sec = a->tv_nsec = 0; 87} 88 89static __inline__ int timespec_is_zero( const struct timespec* a ) 90{ 91 return (a->tv_sec == 0 && a->tv_nsec == 0); 92} 93 94static __inline__ int timespec_cmp( const struct timespec* a, const struct timespec* b ) 95{ 96 if (a->tv_sec < b->tv_sec) return -1; 97 if (a->tv_sec > b->tv_sec) return +1; 98 if (a->tv_nsec < b->tv_nsec) return -1; 99 if (a->tv_nsec > b->tv_nsec) return +1; 100 return 0; 101} 102 103static __inline__ int timespec_cmp0( const struct timespec* a ) 104{ 105 if (a->tv_sec < 0) return -1; 106 if (a->tv_sec > 0) return +1; 107 if (a->tv_nsec < 0) return -1; 108 if (a->tv_nsec > 0) return +1; 109 return 0; 110} 111 112extern int __pthread_cond_timedwait(pthread_cond_t*, 113 pthread_mutex_t*, 114 const struct timespec*, 115 clockid_t); 116 117extern int __pthread_cond_timedwait_relative(pthread_cond_t*, 118 pthread_mutex_t*, 119 const struct timespec*); 120 121/* needed by fork.c */ 122extern void __timer_table_start_stop(int stop); 123extern void __bionic_atfork_run_prepare(); 124extern void __bionic_atfork_run_child(); 125extern void __bionic_atfork_run_parent(); 126 127__END_DECLS 128 129#endif /* _PTHREAD_INTERNAL_H_ */ 130