Allocator.cpp revision 36b56886974eae4f9c5ebc96befd3e7bfe5de338 
1//===--- Allocator.cpp - Simple memory allocation abstraction -------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the BumpPtrAllocator interface.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Support/Allocator.h"
15#include "llvm/Support/Compiler.h"
16#include "llvm/Support/DataTypes.h"
17#include "llvm/Support/Memory.h"
18#include "llvm/Support/Recycler.h"
19#include "llvm/Support/raw_ostream.h"
20#include <cstring>
21
22namespace llvm {
23
24SlabAllocator::~SlabAllocator() { }
25
26MallocSlabAllocator::~MallocSlabAllocator() { }
27
28MemSlab *MallocSlabAllocator::Allocate(size_t Size) {
29  MemSlab *Slab = (MemSlab*)Allocator.Allocate(Size, 0);
30  Slab->Size = Size;
31  Slab->NextPtr = 0;
32  return Slab;
33}
34
35void MallocSlabAllocator::Deallocate(MemSlab *Slab) {
36  Allocator.Deallocate(Slab);
37}
38
39void BumpPtrAllocatorBase::PrintStats() const {
40  unsigned NumSlabs = 0;
41  size_t TotalMemory = 0;
42  for (MemSlab *Slab = CurSlab; Slab != 0; Slab = Slab->NextPtr) {
43    TotalMemory += Slab->Size;
44    ++NumSlabs;
45  }
46
47  errs() << "\nNumber of memory regions: " << NumSlabs << '\n'
48         << "Bytes used: " << BytesAllocated << '\n'
49         << "Bytes allocated: " << TotalMemory << '\n'
50         << "Bytes wasted: " << (TotalMemory - BytesAllocated)
51         << " (includes alignment, etc)\n";
52}
53
54size_t BumpPtrAllocatorBase::getTotalMemory() const {
55  size_t TotalMemory = 0;
56  for (MemSlab *Slab = CurSlab; Slab != 0; Slab = Slab->NextPtr) {
57    TotalMemory += Slab->Size;
58  }
59  return TotalMemory;
60}
61
62void PrintRecyclerStats(size_t Size,
63                        size_t Align,
64                        size_t FreeListSize) {
65  errs() << "Recycler element size: " << Size << '\n'
66         << "Recycler element alignment: " << Align << '\n'
67         << "Number of elements free for recycling: " << FreeListSize << '\n';
68}
69
70}
71