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9f617d64c5
I'm about to add. This is similar to, but necessarily different than, the STL allocator class. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31285 91177308-0d34-0410-b5e6-96231b3b80d8
49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
//===--- Allocator.h - Simple memory allocation abstraction -----*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Chris Lattner and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the MallocAllocator and BumpPtrAllocator interfaces.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_ALLOCATOR_H
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#define LLVM_SUPPORT_ALLOCATOR_H
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#include <cstdlib>
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namespace llvm {
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class MallocAllocator {
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public:
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MallocAllocator() {}
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~MallocAllocator() {}
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void *Allocate(unsigned Size, unsigned Alignment) { return malloc(Size); }
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void Deallocate(void *Ptr) { free(Ptr); }
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void PrintStats() const {}
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};
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/// BumpPtrAllocator - This allocator is useful for containers that need very
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/// simple memory allocation strategies. In particular, this just keeps
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/// allocating memory, and never deletes it until the entire block is dead. This
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/// makes allocation speedy, but must only be used when the trade-off is ok.
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class BumpPtrAllocator {
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void *TheMemory;
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public:
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BumpPtrAllocator();
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~BumpPtrAllocator();
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void *Allocate(unsigned Size, unsigned Alignment);
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void Deallocate(void *Ptr) {}
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void PrintStats() const;
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};
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} // end namespace clang
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#endif
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