1 //===--- Allocator.h - Simple memory allocation abstraction -----*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines the MallocAllocator and BumpPtrAllocator interfaces.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_SUPPORT_ALLOCATOR_H
15 #define LLVM_SUPPORT_ALLOCATOR_H
17 #include "llvm/Support/AlignOf.h"
22 class MallocAllocator {
29 void *Allocate(size_t Size, size_t /*Alignment*/) { return malloc(Size); }
32 T *Allocate() { return static_cast<T*>(malloc(sizeof(T))); }
34 void Deallocate(void *Ptr) { free(Ptr); }
36 void PrintStats() const {}
39 /// BumpPtrAllocator - This allocator is useful for containers that need very
40 /// simple memory allocation strategies. In particular, this just keeps
41 /// allocating memory, and never deletes it until the entire block is dead. This
42 /// makes allocation speedy, but must only be used when the trade-off is ok.
43 class BumpPtrAllocator {
51 void *Allocate(size_t Size, size_t Alignment);
55 return static_cast<T*>(Allocate(sizeof(T),AlignOf<T>::Alignment));
58 void Deallocate(void */*Ptr*/) {}
60 void PrintStats() const;
63 } // end namespace llvm