forked from OSchip/llvm-project
71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
//===--- Allocator.cpp - Simple memory allocation abstraction -------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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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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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the BumpPtrAllocator interface.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Allocator.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/DataTypes.h"
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#include "llvm/Support/Memory.h"
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#include "llvm/Support/Recycler.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cstring>
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namespace llvm {
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SlabAllocator::~SlabAllocator() { }
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MallocSlabAllocator::~MallocSlabAllocator() { }
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MemSlab *MallocSlabAllocator::Allocate(size_t Size) {
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MemSlab *Slab = (MemSlab*)Allocator.Allocate(Size, 0);
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Slab->Size = Size;
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Slab->NextPtr = 0;
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return Slab;
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}
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void MallocSlabAllocator::Deallocate(MemSlab *Slab) {
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Allocator.Deallocate(Slab);
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}
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void BumpPtrAllocatorBase::PrintStats() const {
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unsigned NumSlabs = 0;
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size_t TotalMemory = 0;
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for (MemSlab *Slab = CurSlab; Slab != 0; Slab = Slab->NextPtr) {
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TotalMemory += Slab->Size;
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++NumSlabs;
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}
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errs() << "\nNumber of memory regions: " << NumSlabs << '\n'
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<< "Bytes used: " << BytesAllocated << '\n'
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<< "Bytes allocated: " << TotalMemory << '\n'
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<< "Bytes wasted: " << (TotalMemory - BytesAllocated)
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<< " (includes alignment, etc)\n";
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}
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size_t BumpPtrAllocatorBase::getTotalMemory() const {
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size_t TotalMemory = 0;
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for (MemSlab *Slab = CurSlab; Slab != 0; Slab = Slab->NextPtr) {
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TotalMemory += Slab->Size;
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}
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return TotalMemory;
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}
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void PrintRecyclerStats(size_t Size,
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size_t Align,
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size_t FreeListSize) {
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errs() << "Recycler element size: " << Size << '\n'
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<< "Recycler element alignment: " << Align << '\n'
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<< "Number of elements free for recycling: " << FreeListSize << '\n';
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}
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}
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