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ab17ecd107
This may improve the waiting of `Region->MMLock` while trying to refill the freelist. Instead of always waiting on the completion of `populateFreeListAndPopBatch()` or `releaseToOSMaybe()`, `pushBlocks()` also refills the freelist. This increases the chance of earlier return from `popBatches()`. The support of condition variable hasn't been done for all platforms. Therefore, add another `popBatchWithCV()` and it can be configured in the allocator configuration by setting `Primary::UseConditionVariable` and the desired `ConditionVariableT`. Reviewed By: cferris Differential Revision: https://reviews.llvm.org/D156146
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
//===-- condition_variable_base.h -------------------------------*- C++ -*-===//
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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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#ifndef SCUDO_CONDITION_VARIABLE_BASE_H_
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#define SCUDO_CONDITION_VARIABLE_BASE_H_
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#include "mutex.h"
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#include "thread_annotations.h"
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namespace scudo {
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template <typename Derived> class ConditionVariableBase {
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public:
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constexpr ConditionVariableBase() = default;
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void bindTestOnly(HybridMutex &Mutex) {
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#if SCUDO_DEBUG
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boundMutex = &Mutex;
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#else
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(void)Mutex;
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#endif
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}
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void notifyAll(HybridMutex &M) REQUIRES(M) {
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#if SCUDO_DEBUG
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CHECK_EQ(&M, boundMutex);
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#endif
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getDerived()->notifyAllImpl(M);
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}
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void wait(HybridMutex &M) REQUIRES(M) {
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#if SCUDO_DEBUG
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CHECK_EQ(&M, boundMutex);
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#endif
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getDerived()->waitImpl(M);
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}
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protected:
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Derived *getDerived() { return static_cast<Derived *>(this); }
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#if SCUDO_DEBUG
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// Because thread-safety analysis doesn't support pointer aliasing, we are not
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// able to mark the proper annotations without false positive. Instead, we
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// pass the lock and do the same-lock check separately.
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HybridMutex *boundMutex = nullptr;
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#endif
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};
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} // namespace scudo
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#endif // SCUDO_CONDITION_VARIABLE_BASE_H_
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