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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
51 lines
1.5 KiB
PHP
51 lines
1.5 KiB
PHP
//= llvm/Support/Unix/RWMutex.inc - Unix Reader/Writer Mutual Exclusion Lock =//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the Unix specific (non-pthread) RWMutex class.
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//
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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//=== WARNING: Implementation here must contain only generic UNIX code that
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//=== is guaranteed to work on *all* UNIX variants.
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Mutex.h"
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namespace llvm {
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using namespace sys;
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// This naive implementation treats readers the same as writers. This
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// will therefore deadlock if a thread tries to acquire a read lock
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// multiple times.
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RWMutexImpl::RWMutexImpl() : data_(new MutexImpl(false)) { }
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RWMutexImpl::~RWMutexImpl() {
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delete static_cast<MutexImpl *>(data_);
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}
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bool RWMutexImpl::reader_acquire() {
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return static_cast<MutexImpl *>(data_)->acquire();
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}
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bool RWMutexImpl::reader_release() {
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return static_cast<MutexImpl *>(data_)->release();
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}
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bool RWMutexImpl::writer_acquire() {
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return static_cast<MutexImpl *>(data_)->acquire();
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}
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bool RWMutexImpl::writer_release() {
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return static_cast<MutexImpl *>(data_)->release();
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}
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}
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