mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
66374a14ea
This allows an elegant design in which we can still allocate RawSyntax nodes using a bump allocator but are able to automatically free that buffer once the last RawSyntax node within that buffer is freed. This also resolves a memory leak of RawSyntax nodes that was caused by ParserUnit not freeing its underlying ASTContext.
46 lines
1.3 KiB
C++
46 lines
1.3 KiB
C++
//===--- SyntaxArena.h - Syntax Tree Memory Allocation ----------*- C++ -*-===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines SyntaxArena that is Memory manager for Syntax nodes.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef SWIFT_SYNTAX_SYNTAXARENA_H
|
|
#define SWIFT_SYNTAX_SYNTAXARENA_H
|
|
|
|
#include "llvm/ADT/IntrusiveRefCntPtr.h"
|
|
#include "llvm/Support/Allocator.h"
|
|
|
|
namespace swift {
|
|
namespace syntax {
|
|
|
|
/// Memory manager for Syntax nodes.
|
|
class SyntaxArena : public llvm::ThreadSafeRefCountedBase<SyntaxArena> {
|
|
SyntaxArena(const SyntaxArena &) = delete;
|
|
void operator=(const SyntaxArena &) = delete;
|
|
|
|
llvm::BumpPtrAllocator Allocator;
|
|
|
|
public:
|
|
SyntaxArena() {}
|
|
|
|
llvm::BumpPtrAllocator &getAllocator() { return Allocator; }
|
|
void *Allocate(size_t size, size_t alignment) {
|
|
return Allocator.Allocate(size, alignment);
|
|
}
|
|
};
|
|
|
|
} // namespace syntax
|
|
} // namespace swift
|
|
|
|
#endif
|