98 lines
3.5 KiB
C++
98 lines
3.5 KiB
C++
/*
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* Copyright (C) 2008 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "pthread_internal.h"
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#include "private/bionic_futex.h"
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#include "private/bionic_pthread.h"
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#include "private/bionic_tls.h"
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#include "private/ScopedPthreadMutexLocker.h"
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pthread_internal_t* gThreadList = NULL;
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pthread_mutex_t gThreadListLock = PTHREAD_MUTEX_INITIALIZER;
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void _pthread_internal_remove_locked(pthread_internal_t* thread) {
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if (thread->next != NULL) {
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thread->next->prev = thread->prev;
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}
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if (thread->prev != NULL) {
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thread->prev->next = thread->next;
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} else {
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gThreadList = thread->next;
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}
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// The main thread is not heap-allocated. See __libc_init_tls for the declaration,
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// and __libc_init_common for the point where it's added to the thread list.
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if ((thread->attr.flags & PTHREAD_ATTR_FLAG_MAIN_THREAD) == 0) {
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free(thread);
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}
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}
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void _pthread_internal_add(pthread_internal_t* thread) {
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ScopedPthreadMutexLocker locker(&gThreadListLock);
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// We insert at the head.
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thread->next = gThreadList;
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thread->prev = NULL;
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if (thread->next != NULL) {
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thread->next->prev = thread;
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}
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gThreadList = thread;
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}
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pthread_internal_t* __get_thread(void) {
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return reinterpret_cast<pthread_internal_t*>(__get_tls()[TLS_SLOT_THREAD_ID]);
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}
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pid_t __pthread_gettid(pthread_t t) {
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return reinterpret_cast<pthread_internal_t*>(t)->tid;
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}
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// Initialize 'ts' with the difference between 'abstime' and the current time
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// according to 'clock'. Returns -1 if abstime already expired, or 0 otherwise.
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int __timespec_to_absolute(timespec* ts, const timespec* abstime, clockid_t clock) {
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clock_gettime(clock, ts);
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ts->tv_sec = abstime->tv_sec - ts->tv_sec;
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ts->tv_nsec = abstime->tv_nsec - ts->tv_nsec;
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if (ts->tv_nsec < 0) {
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ts->tv_sec--;
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ts->tv_nsec += 1000000000;
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}
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if ((ts->tv_nsec < 0) || (ts->tv_sec < 0)) {
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return -1;
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}
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return 0;
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}
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int __futex_wake_ex(volatile void* ftx, int pshared, int val) {
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return __futex_syscall3(ftx, pshared ? FUTEX_WAKE : FUTEX_WAKE_PRIVATE, val);
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}
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int __futex_wait_ex(volatile void* ftx, int pshared, int val, const timespec* timeout) {
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return __futex_syscall4(ftx, pshared ? FUTEX_WAIT : FUTEX_WAIT_PRIVATE, val, timeout);
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}
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