84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
|
|
// or more contributor license agreements. See the NOTICE file
|
|
// distributed with this work for additional information
|
|
// regarding copyright ownership. The ASF licenses this file
|
|
// to you under the Apache License, Version 2.0 (the
|
|
// "License"); you may not use this file except in compliance
|
|
// with the License. You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing,
|
|
// software distributed under the License is distributed on an
|
|
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
// KIND, either express or implied. See the License for the
|
|
// specific language governing permissions and limitations
|
|
// under the License.
|
|
#include "runtime/threadlocal.h"
|
|
|
|
#include <pthread.h>
|
|
|
|
#include <memory>
|
|
#include <ostream>
|
|
|
|
#include "common/logging.h"
|
|
#include "gutil/once.h"
|
|
#include "util/errno.h"
|
|
|
|
namespace doris {
|
|
|
|
// One key used by the entire process to attach destructors on thread exit.
|
|
static pthread_key_t destructors_key;
|
|
|
|
// The above key must only be initialized once per process.
|
|
static GoogleOnceType once = GOOGLE_ONCE_INIT;
|
|
|
|
namespace {
|
|
|
|
// List of destructors for all thread locals instantiated on a given thread.
|
|
struct PerThreadDestructorList {
|
|
void (*destructor)(void*);
|
|
void* arg;
|
|
PerThreadDestructorList* next;
|
|
};
|
|
|
|
} // anonymous namespace
|
|
|
|
// Call all the destructors associated with all THREAD_LOCAL instances in this
|
|
// thread.
|
|
static void invoke_destructors(void* t) {
|
|
PerThreadDestructorList* d = reinterpret_cast<PerThreadDestructorList*>(t);
|
|
while (d != nullptr) {
|
|
d->destructor(d->arg);
|
|
PerThreadDestructorList* next = d->next;
|
|
delete d;
|
|
d = next;
|
|
}
|
|
}
|
|
|
|
// This key must be initialized only once.
|
|
static void create_key() {
|
|
int ret = pthread_key_create(&destructors_key, &invoke_destructors);
|
|
// Linux supports up to 1024 keys, we will use only one for all thread locals.
|
|
CHECK_EQ(0, ret) << "pthread_key_create() failed, cannot add destructor to thread: "
|
|
<< "error " << ret << ": " << errno_to_string(ret);
|
|
}
|
|
|
|
// Adds a destructor to the list.
|
|
void add_destructor(void (*destructor)(void*), void* arg) {
|
|
GoogleOnceInit(&once, &create_key);
|
|
|
|
// Returns NULL if nothing is set yet.
|
|
std::unique_ptr<PerThreadDestructorList> p(new PerThreadDestructorList());
|
|
p->destructor = destructor;
|
|
p->arg = arg;
|
|
p->next = reinterpret_cast<PerThreadDestructorList*>(pthread_getspecific(destructors_key));
|
|
int ret = pthread_setspecific(destructors_key, p.release());
|
|
// The only time this check should fail is if we are out of memory, or if
|
|
// somehow key creation failed, which should be caught by the above CHECK.
|
|
CHECK_EQ(0, ret) << "pthread_setspecific() failed, cannot update destructor list: "
|
|
<< "error " << ret << ": " << errno_to_string(ret);
|
|
}
|
|
|
|
} // namespace doris
|