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100 lines
2.3 KiB
100 lines
2.3 KiB
/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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#pragma once
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#if !defined(_WIN32)
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#include <pthread.h>
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#else
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#include <mutex> // NOLINT
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#endif // !_WIN32
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#include "paddle/fluid/platform/enforce.h"
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namespace paddle {
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namespace framework {
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#if !defined(_WIN32)
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struct RWLock {
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RWLock() { pthread_rwlock_init(&lock_, nullptr); }
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~RWLock() { pthread_rwlock_destroy(&lock_); }
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inline void RDLock() {
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PADDLE_ENFORCE_EQ(pthread_rwlock_rdlock(&lock_), 0,
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"acquire read lock failed");
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}
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inline void WRLock() {
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PADDLE_ENFORCE_EQ(pthread_rwlock_wrlock(&lock_), 0,
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"acquire write lock failed");
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}
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inline void UNLock() {
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PADDLE_ENFORCE_EQ(pthread_rwlock_unlock(&lock_), 0, "unlock failed");
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}
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private:
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pthread_rwlock_t lock_;
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};
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// TODO(paddle-dev): Support RWLock for WIN32 for correctness.
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#else
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// https://stackoverflow.com/questions/7125250/making-pthread-rwlock-wrlock-recursive
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// In windows, rw_lock seems like a hack. Use empty object and do nothing.
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struct RWLock {
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// FIXME(minqiyang): use mutex here to do fake lock
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inline void RDLock() { mutex_.lock(); }
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inline void WRLock() { mutex_.lock(); }
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inline void UNLock() { mutex_.unlock(); }
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private:
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std::mutex mutex_;
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};
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#endif
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class AutoWRLock {
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public:
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explicit AutoWRLock(RWLock* rw_lock) : lock_(rw_lock) { Lock(); }
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~AutoWRLock() { UnLock(); }
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private:
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inline void Lock() { lock_->WRLock(); }
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inline void UnLock() { lock_->UNLock(); }
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private:
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RWLock* lock_;
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};
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class AutoRDLock {
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public:
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explicit AutoRDLock(RWLock* rw_lock) : lock_(rw_lock) { Lock(); }
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~AutoRDLock() { UnLock(); }
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private:
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inline void Lock() { lock_->RDLock(); }
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inline void UnLock() { lock_->UNLock(); }
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private:
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RWLock* lock_;
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};
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} // namespace framework
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} // namespace paddle
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