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 29#ifndef _PTHREAD_H_ 30#define _PTHREAD_H_ 31 32#include <limits.h> 33#include <bits/pthread_types.h> 34#include <sched.h> 35#include <sys/cdefs.h> 36#include <sys/types.h> 37#include <time.h> 38 39__BEGIN_DECLS 40 41enum { 42 PTHREAD_MUTEX_NORMAL = 0, 43 PTHREAD_MUTEX_RECURSIVE = 1, 44 PTHREAD_MUTEX_ERRORCHECK = 2, 45 46 PTHREAD_MUTEX_ERRORCHECK_NP = PTHREAD_MUTEX_ERRORCHECK, 47 PTHREAD_MUTEX_RECURSIVE_NP = PTHREAD_MUTEX_RECURSIVE, 48 49 PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL 50}; 51 52#define PTHREAD_MUTEX_INITIALIZER { { ((PTHREAD_MUTEX_NORMAL & 3) << 14) } } 53#define PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP { { ((PTHREAD_MUTEX_RECURSIVE & 3) << 14) } } 54#define PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP { { ((PTHREAD_MUTEX_ERRORCHECK & 3) << 14) } } 55 56#define PTHREAD_COND_INITIALIZER { { 0 } } 57#if __ANDROID_API__ >= __ANDROID_API_L__ 58#define PTHREAD_COND_INITIALIZER_MONOTONIC_NP { { 1 << 1 } } 59#endif 60 61#define PTHREAD_RWLOCK_INITIALIZER { { 0 } } 62 63enum { 64 PTHREAD_RWLOCK_PREFER_READER_NP = 0, 65 PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP = 1, 66}; 67 68#define PTHREAD_ONCE_INIT 0 69 70#if __ANDROID_API__ >= __ANDROID_API_N__ 71#define PTHREAD_BARRIER_SERIAL_THREAD -1 72#endif 73 74#if defined(__LP64__) 75#define PTHREAD_STACK_MIN (4 * PAGE_SIZE) 76#else 77#define PTHREAD_STACK_MIN (2 * PAGE_SIZE) 78#endif 79 80#define PTHREAD_CREATE_DETACHED 1 81#define PTHREAD_CREATE_JOINABLE 0 82 83#define PTHREAD_EXPLICIT_SCHED 0 84#define PTHREAD_INHERIT_SCHED 1 85 86#define PTHREAD_PRIO_NONE 0 87#define PTHREAD_PRIO_INHERIT 1 88 89#define PTHREAD_PROCESS_PRIVATE 0 90#define PTHREAD_PROCESS_SHARED 1 91 92#define PTHREAD_SCOPE_SYSTEM 0 93#define PTHREAD_SCOPE_PROCESS 1 94 95int pthread_atfork(void (*__prepare)(void), void (*__parent)(void), void (*__child)(void)) __INTRODUCED_IN(12); 96 97int pthread_attr_destroy(pthread_attr_t* __attr); 98int pthread_attr_getdetachstate(const pthread_attr_t* __attr, int* __state); 99int pthread_attr_getguardsize(const pthread_attr_t* __attr, size_t* __size); 100int pthread_attr_getinheritsched(const pthread_attr_t* __attr, int* __flag); 101int pthread_attr_getschedparam(const pthread_attr_t* __attr, struct sched_param* __param); 102int pthread_attr_getschedpolicy(const pthread_attr_t* __attr, int* __policy); 103int pthread_attr_getscope(const pthread_attr_t* __attr, int* __scope); 104int pthread_attr_getstack(const pthread_attr_t* __attr, void** __addr, size_t* __size); 105int pthread_attr_getstacksize(const pthread_attr_t* __attr, size_t* __size); 106int pthread_attr_init(pthread_attr_t* __attr); 107int pthread_attr_setdetachstate(pthread_attr_t* __attr, int __state); 108int pthread_attr_setguardsize(pthread_attr_t* __attr, size_t __size); 109int pthread_attr_setinheritsched(pthread_attr_t* __attr, int __flag); 110int pthread_attr_setschedparam(pthread_attr_t* __attr, const struct sched_param* __param); 111int pthread_attr_setschedpolicy(pthread_attr_t* __attr, int __policy); 112int pthread_attr_setscope(pthread_attr_t* __attr, int __scope); 113int pthread_attr_setstack(pthread_attr_t* __attr, void* __addr, size_t __size); 114int pthread_attr_setstacksize(pthread_attr_t* __addr, size_t __size); 115 116int pthread_condattr_destroy(pthread_condattr_t* __attr); 117int pthread_condattr_getclock(const pthread_condattr_t* __attr, clockid_t* __clock) __INTRODUCED_IN(21); 118int pthread_condattr_getpshared(const pthread_condattr_t* __attr, int* __shared); 119int pthread_condattr_init(pthread_condattr_t* __attr); 120int pthread_condattr_setclock(pthread_condattr_t* __attr, clockid_t __clock) __INTRODUCED_IN(21); 121int pthread_condattr_setpshared(pthread_condattr_t* __attr, int __shared); 122 123int pthread_cond_broadcast(pthread_cond_t* __cond); 124int pthread_cond_destroy(pthread_cond_t* __cond); 125int pthread_cond_init(pthread_cond_t* __cond, const pthread_condattr_t* __attr); 126int pthread_cond_signal(pthread_cond_t* __cond); 127int pthread_cond_timedwait(pthread_cond_t* __cond, pthread_mutex_t* __mutex, const struct timespec* __timeout); 128/* 129 * Condition variables use CLOCK_REALTIME by default for their timeouts, however that is 130 * typically inappropriate, since that clock can change dramatically, causing the timeout to 131 * either expire earlier or much later than intended. 132 * Condition variables have an initialization option to use CLOCK_MONOTONIC, and in addition, 133 * Android provides this API to use CLOCK_MONOTONIC on a condition variable for this single wait 134 * no matter how it was initialized. 135 */ 136int pthread_cond_timedwait_monotonic_np(pthread_cond_t* __cond, pthread_mutex_t* __mutex, 137 const struct timespec* __timeout) __INTRODUCED_IN_64(28); 138int pthread_cond_wait(pthread_cond_t* __cond, pthread_mutex_t* __mutex); 139 140int pthread_create(pthread_t* __pthread_ptr, pthread_attr_t const* __attr, void* (*__start_routine)(void*), void*); 141int pthread_detach(pthread_t __pthread); 142void pthread_exit(void* __return_value) __noreturn; 143 144int pthread_equal(pthread_t __lhs, pthread_t __rhs); 145 146int pthread_getattr_np(pthread_t __pthread, pthread_attr_t* __attr); 147 148int pthread_getcpuclockid(pthread_t __pthread, clockid_t* __clock); 149 150int pthread_getschedparam(pthread_t __pthread, int* __policy, struct sched_param* __param); 151 152void* pthread_getspecific(pthread_key_t __key); 153 154pid_t pthread_gettid_np(pthread_t __pthread) __INTRODUCED_IN(21); 155 156int pthread_join(pthread_t __pthread, void** __return_value_ptr); 157 158int pthread_key_create(pthread_key_t* __key_ptr, void (*__key_destructor)(void*)); 159int pthread_key_delete(pthread_key_t __key); 160 161int pthread_mutexattr_destroy(pthread_mutexattr_t* __attr); 162int pthread_mutexattr_getpshared(const pthread_mutexattr_t* __attr, int* __shared); 163int pthread_mutexattr_gettype(const pthread_mutexattr_t* __attr, int* __type); 164int pthread_mutexattr_getprotocol(const pthread_mutexattr_t* __attr, int* __protocol) __INTRODUCED_IN(28); 165int pthread_mutexattr_init(pthread_mutexattr_t* __attr); 166int pthread_mutexattr_setpshared(pthread_mutexattr_t* __attr, int __shared); 167int pthread_mutexattr_settype(pthread_mutexattr_t* __attr, int __type); 168int pthread_mutexattr_setprotocol(pthread_mutexattr_t* __attr, int __protocol) __INTRODUCED_IN(28); 169 170int pthread_mutex_destroy(pthread_mutex_t* __mutex); 171int pthread_mutex_init(pthread_mutex_t* __mutex, const pthread_mutexattr_t* __attr); 172int pthread_mutex_lock(pthread_mutex_t* __mutex); 173int pthread_mutex_timedlock(pthread_mutex_t* __mutex, const struct timespec* __timeout) 174 __INTRODUCED_IN(21); 175 176/* 177 * POSIX only supports using pthread_mutex_timedlock() with CLOCK_REALTIME, however that is 178 * typically inappropriate, since that clock can change dramatically, causing the timeout to 179 * either expire earlier or much later than intended. 180 * This function is added to use a timespec based on CLOCK_MONOTONIC that does not suffer 181 * from this issue. 182 */ 183int pthread_mutex_timedlock_monotonic_np(pthread_mutex_t* __mutex, const struct timespec* __timeout) 184 __INTRODUCED_IN(28); 185int pthread_mutex_trylock(pthread_mutex_t* __mutex); 186int pthread_mutex_unlock(pthread_mutex_t* __mutex); 187 188#if __ANDROID_API__ < 21 189/* 190 * Cruft for supporting old API levels. Pre-L we didn't have the proper POSIX 191 * APIs for things, but instead had some locally grown, artisan equivalents. 192 * Keep exposing the old prototypes on old API levels so we don't regress 193 * functionality. 194 * 195 * See the following bugs: 196 * * https://github.com/android-ndk/ndk/issues/420 197 * * https://github.com/android-ndk/ndk/issues/423 198 * * https://stackoverflow.com/q/44580542/632035 199 */ 200int pthread_mutex_lock_timeout_np(pthread_mutex_t* __mutex, unsigned __timeout_ms); 201int pthread_cond_timeout_np(pthread_cond_t* __cond, pthread_mutex_t* __mutex, unsigned __timeout_ms); 202int pthread_cond_timedwait_relative_np(pthread_cond_t* __cond, pthread_mutex_t* __mutex, const struct timespec* __relative_timeout); 203#endif 204 205int pthread_once(pthread_once_t* __once, void (*__init_routine)(void)); 206 207int pthread_rwlockattr_init(pthread_rwlockattr_t* __attr); 208int pthread_rwlockattr_destroy(pthread_rwlockattr_t* __attr); 209int pthread_rwlockattr_getpshared(const pthread_rwlockattr_t* __attr, int* __shared); 210int pthread_rwlockattr_setpshared(pthread_rwlockattr_t* __attr, int __shared); 211int pthread_rwlockattr_getkind_np(const pthread_rwlockattr_t* __attr, int* __kind) 212 __INTRODUCED_IN(23); 213int pthread_rwlockattr_setkind_np(pthread_rwlockattr_t* __attr, int __kind) __INTRODUCED_IN(23); 214 215int pthread_rwlock_destroy(pthread_rwlock_t* __rwlock); 216int pthread_rwlock_init(pthread_rwlock_t* __rwlock, const pthread_rwlockattr_t* __attr); 217int pthread_rwlock_rdlock(pthread_rwlock_t* __rwlock); 218int pthread_rwlock_timedrdlock(pthread_rwlock_t* __rwlock, const struct timespec* __timeout); 219/* See the comment on pthread_mutex_timedlock_monotonic_np for usage of this function. */ 220int pthread_rwlock_timedrdlock_monotonic_np(pthread_rwlock_t* __rwlock, 221 const struct timespec* __timeout) __INTRODUCED_IN(28); 222int pthread_rwlock_timedwrlock(pthread_rwlock_t* __rwlock, const struct timespec* __timeout); 223/* See the comment on pthread_mutex_timedlock_monotonic_np for usage of this function. */ 224int pthread_rwlock_timedwrlock_monotonic_np(pthread_rwlock_t* __rwlock, 225 const struct timespec* __timeout) __INTRODUCED_IN(28); 226int pthread_rwlock_tryrdlock(pthread_rwlock_t* __rwlock); 227int pthread_rwlock_trywrlock(pthread_rwlock_t* __rwlock); 228int pthread_rwlock_unlock(pthread_rwlock_t* __rwlock); 229int pthread_rwlock_wrlock(pthread_rwlock_t* __rwlock); 230 231#if __ANDROID_API__ >= __ANDROID_API_N__ 232int pthread_barrierattr_init(pthread_barrierattr_t* __attr) __INTRODUCED_IN(24); 233int pthread_barrierattr_destroy(pthread_barrierattr_t* __attr) __INTRODUCED_IN(24); 234int pthread_barrierattr_getpshared(const pthread_barrierattr_t* __attr, int* __shared) __INTRODUCED_IN(24); 235int pthread_barrierattr_setpshared(pthread_barrierattr_t* __attr, int __shared) __INTRODUCED_IN(24); 236#endif 237 238#if __ANDROID_API__ >= __ANDROID_API_N__ 239int pthread_barrier_init(pthread_barrier_t* __barrier, const pthread_barrierattr_t* __attr, unsigned __count) __INTRODUCED_IN(24); 240int pthread_barrier_destroy(pthread_barrier_t* __barrier) __INTRODUCED_IN(24); 241int pthread_barrier_wait(pthread_barrier_t* __barrier) __INTRODUCED_IN(24); 242#endif 243 244#if __ANDROID_API__ >= __ANDROID_API_N__ 245int pthread_spin_destroy(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24); 246int pthread_spin_init(pthread_spinlock_t* __spinlock, int __shared) __INTRODUCED_IN(24); 247int pthread_spin_lock(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24); 248int pthread_spin_trylock(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24); 249int pthread_spin_unlock(pthread_spinlock_t* __spinlock) __INTRODUCED_IN(24); 250#endif 251 252pthread_t pthread_self(void) __attribute_const__; 253 254#if defined(__USE_GNU) 255int pthread_getname_np(pthread_t __pthread, char* __buf, size_t __n) __INTRODUCED_IN(26); 256#endif 257/* TODO: this should be __USE_GNU too. */ 258int pthread_setname_np(pthread_t __pthread, const char* __name); 259 260int pthread_setschedparam(pthread_t __pthread, int __policy, const struct sched_param* __param); 261int pthread_setschedprio(pthread_t __pthread, int __priority) __INTRODUCED_IN(28); 262 263int pthread_setspecific(pthread_key_t __key, const void* __value); 264 265typedef void (*__pthread_cleanup_func_t)(void*); 266 267typedef struct __pthread_cleanup_t { 268 struct __pthread_cleanup_t* __cleanup_prev; 269 __pthread_cleanup_func_t __cleanup_routine; 270 void* __cleanup_arg; 271} __pthread_cleanup_t; 272 273void __pthread_cleanup_push(__pthread_cleanup_t* c, __pthread_cleanup_func_t, void*); 274void __pthread_cleanup_pop(__pthread_cleanup_t*, int); 275 276/* Believe or not, the definitions of pthread_cleanup_push and 277 * pthread_cleanup_pop below are correct. Posix states that these 278 * can be implemented as macros that might introduce opening and 279 * closing braces, and that using setjmp/longjmp/return/break/continue 280 * between them results in undefined behavior. 281 */ 282#define pthread_cleanup_push(routine, arg) \ 283 do { \ 284 __pthread_cleanup_t __cleanup; \ 285 __pthread_cleanup_push( &__cleanup, (routine), (arg) ); \ 286 287#define pthread_cleanup_pop(execute) \ 288 __pthread_cleanup_pop( &__cleanup, (execute)); \ 289 } while (0); \ 290 291__END_DECLS 292 293#endif 294