2006-10-29 22:08:03 +00:00
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//===--- 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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2007-12-29 19:59:42 +00:00
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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2006-10-29 22:08:03 +00:00
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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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2007-10-17 21:10:21 +00:00
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#include "llvm/Support/AlignOf.h"
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2006-10-29 22:08:03 +00:00
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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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2007-09-05 21:41:34 +00:00
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void Reset() {}
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2008-06-24 17:49:26 +00:00
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2008-06-26 18:11:45 +00:00
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void *Allocate(size_t Size, size_t /*Alignment*/) { return malloc(Size); }
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2007-10-17 21:10:21 +00:00
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template <typename T>
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2008-06-24 17:49:26 +00:00
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T *Allocate() { return static_cast<T*>(malloc(sizeof(T))); }
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2007-10-17 21:10:21 +00:00
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2006-10-29 22:08:03 +00:00
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void Deallocate(void *Ptr) { free(Ptr); }
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2008-06-24 17:49:26 +00:00
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2006-10-29 22:08:03 +00:00
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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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2007-09-05 21:41:34 +00:00
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void Reset();
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2008-06-24 17:49:26 +00:00
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2008-05-05 18:30:58 +00:00
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void *Allocate(size_t Size, size_t Alignment);
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2007-10-17 21:10:21 +00:00
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template <typename T>
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2008-06-24 17:49:26 +00:00
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T *Allocate() {
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return static_cast<T*>(Allocate(sizeof(T),AlignOf<T>::Alignment));
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2007-10-17 21:10:21 +00:00
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}
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2008-07-07 18:34:27 +00:00
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void Deallocate(void * /*Ptr*/) {}
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2008-06-24 17:49:26 +00:00
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2006-10-29 22:08:03 +00:00
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void PrintStats() const;
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};
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2007-12-14 15:11:58 +00:00
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} // end namespace llvm
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2006-10-29 22:08:03 +00:00
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#endif
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