llvm/llvm/include/llvm/Support/PerThreadBumpPtrAllocator.h

//===- PerThreadBumpPtrAllocator.h ------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_PERTHREADBUMPPTRALLOCATOR_H
#define LLVM_SUPPORT_PERTHREADBUMPPTRALLOCATOR_H

#include "llvm/Support/Allocator.h"
#include "llvm/Support/Parallel.h"

namespace llvm {
namespace parallel {

/// PerThreadAllocator is used in conjunction with ThreadPoolExecutor to allow
/// per-thread allocations. It wraps a possibly thread-unsafe allocator,
/// e.g. BumpPtrAllocator. PerThreadAllocator must be used with only main thread
/// or threads created by ThreadPoolExecutor, as it utilizes getThreadIndex,
/// which is set by ThreadPoolExecutor. To work properly, ThreadPoolExecutor
/// should be initialized before PerThreadAllocator is created.
/// TODO: The same approach might be implemented for ThreadPool.

template <typename AllocatorTy>
class PerThreadAllocator
    : public AllocatorBase<PerThreadAllocator<AllocatorTy>> { … };

PerThreadBumpPtrAllocator;

} // end namespace parallel
} // end namespace llvm

#endif // LLVM_SUPPORT_PERTHREADBUMPPTRALLOCATOR_H