23f750b068
Also simplifies the Darwin implementation of gettid, because apparently libbacktrace had a better way of doing it. Change-Id: I9e14f9176b167405a5aaa5b8a0db0327c7126271
109 lines
3 KiB
C
109 lines
3 KiB
C
/*
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** Copyright (C) 2007, The Android Open Source Project
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**
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** Licensed under the Apache License, Version 2.0 (the "License");
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** you may not use this file except in compliance with the License.
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** You may obtain a copy of the License at
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**
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** http://www.apache.org/licenses/LICENSE-2.0
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**
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** Unless required by applicable law or agreed to in writing, software
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** distributed under the License is distributed on an "AS IS" BASIS,
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** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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** See the License for the specific language governing permissions and
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** limitations under the License.
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*/
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#include "cutils/threads.h"
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// For gettid.
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#if defined(__APPLE__)
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#include "AvailabilityMacros.h" // For MAC_OS_X_VERSION_MAX_ALLOWED
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#include <stdint.h>
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#include <stdlib.h>
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#include <sys/syscall.h>
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#include <sys/time.h>
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#include <unistd.h>
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#elif defined(__linux__) && !defined(__ANDROID__)
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#include <syscall.h>
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#include <unistd.h>
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#elif defined(_WIN32)
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#include <windows.h>
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#endif
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// No definition needed for Android because we'll just pick up bionic's copy.
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#ifndef __ANDROID__
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pid_t gettid() {
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#if defined(__APPLE__)
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return syscall(SYS_thread_selfid);
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#elif defined(__linux__)
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return syscall(__NR_gettid);
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#elif defined(_WIN32)
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return GetCurrentThreadId();
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#endif
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}
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#endif // __ANDROID__
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#if !defined(_WIN32)
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void* thread_store_get( thread_store_t* store )
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{
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if (!store->has_tls)
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return NULL;
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return pthread_getspecific( store->tls );
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}
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extern void thread_store_set( thread_store_t* store,
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void* value,
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thread_store_destruct_t destroy)
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{
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pthread_mutex_lock( &store->lock );
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if (!store->has_tls) {
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if (pthread_key_create( &store->tls, destroy) != 0) {
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pthread_mutex_unlock(&store->lock);
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return;
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}
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store->has_tls = 1;
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}
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pthread_mutex_unlock( &store->lock );
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pthread_setspecific( store->tls, value );
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}
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#else /* !defined(_WIN32) */
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void* thread_store_get( thread_store_t* store )
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{
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if (!store->has_tls)
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return NULL;
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return (void*) TlsGetValue( store->tls );
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}
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void thread_store_set( thread_store_t* store,
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void* value,
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thread_store_destruct_t destroy )
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{
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/* XXX: can't use destructor on thread exit */
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if (!store->lock_init) {
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store->lock_init = -1;
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InitializeCriticalSection( &store->lock );
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store->lock_init = -2;
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} else while (store->lock_init != -2) {
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Sleep(10); /* 10ms */
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}
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EnterCriticalSection( &store->lock );
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if (!store->has_tls) {
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store->tls = TlsAlloc();
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if (store->tls == TLS_OUT_OF_INDEXES) {
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LeaveCriticalSection( &store->lock );
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return;
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}
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store->has_tls = 1;
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}
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LeaveCriticalSection( &store->lock );
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TlsSetValue( store->tls, value );
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}
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#endif /* !defined(_WIN32) */
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