#ifndef LLVM_SUPPORT_ALLOCATOR_H
#define LLVM_SUPPORT_ALLOCATOR_H
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringRef.h"
#include "llvm/Support/AlignOf.h"
+#include "llvm/Support/DataTypes.h"
#include "llvm/Support/MathExtras.h"
-#include "llvm/System/DataTypes.h"
#include <algorithm>
#include <cassert>
-#include <cstdlib>
#include <cstddef>
+#include <cstdlib>
namespace llvm {
+template <typename T> struct ReferenceAdder { typedef T& result; };
+template <typename T> struct ReferenceAdder<T&> { typedef T result; };
class MallocAllocator {
public:
public:
MallocSlabAllocator() : Allocator() { }
virtual ~MallocSlabAllocator();
- virtual MemSlab *Allocate(size_t Size);
- virtual void Deallocate(MemSlab *Slab);
+ virtual MemSlab *Allocate(size_t Size) LLVM_OVERRIDE;
+ virtual void Deallocate(MemSlab *Slab) LLVM_OVERRIDE;
};
/// BumpPtrAllocator - This allocator is useful for containers that need
/// allocating memory, and never deletes it until the entire block is dead. This
/// makes allocation speedy, but must only be used when the trade-off is ok.
class BumpPtrAllocator {
- BumpPtrAllocator(const BumpPtrAllocator &); // do not implement
- void operator=(const BumpPtrAllocator &); // do not implement
+ BumpPtrAllocator(const BumpPtrAllocator &) LLVM_DELETED_FUNCTION;
+ void operator=(const BumpPtrAllocator &) LLVM_DELETED_FUNCTION;
/// SlabSize - Allocate data into slabs of this size unless we get an
/// allocation above SizeThreshold.
/// allocate a separate slab.
size_t SizeThreshold;
+ /// \brief the default allocator used if one is not provided
+ MallocSlabAllocator DefaultSlabAllocator;
+
/// Allocator - The underlying allocator we use to get slabs of memory. This
/// defaults to MallocSlabAllocator, which wraps malloc, but it could be
/// changed to use a custom allocator.
/// one.
void DeallocateSlabs(MemSlab *Slab);
- static MallocSlabAllocator DefaultSlabAllocator;
-
template<typename T> friend class SpecificBumpPtrAllocator;
public:
- BumpPtrAllocator(size_t size = 4096, size_t threshold = 4096,
- SlabAllocator &allocator = DefaultSlabAllocator);
+ BumpPtrAllocator(size_t size = 4096, size_t threshold = 4096);
+ BumpPtrAllocator(size_t size, size_t threshold, SlabAllocator &allocator);
~BumpPtrAllocator();
/// Reset - Deallocate all but the current slab and reset the current pointer
unsigned GetNumSlabs() const;
void PrintStats() const;
+
+
+ /// Allocate space and copy content into it.
+ void *allocateCopy(const void *Src, size_t Size, size_t Alignment=1) {
+ void *P = Allocate(Size, Alignment);
+ memcpy(P, Src, Size);
+ return P;
+ }
+
+ /// Allocate space for an array of type T, and use std::copy()
+ /// to copy the array contents.
+ template <typename T>
+ typename enable_if<isPodLike<T>, T*>::type
+ allocateCopy(const T Src[], size_t Num) {
+ T *P = Allocate<T>(Num);
+ std::copy(Src, &Src[Num], P);
+ return P;
+ }
+
+ /// Copy a StringRef by allocating copy in BumpPtrAllocator.
+ StringRef allocateCopy(StringRef Str) {
+ size_t Length = Str.size();
+ char *P = allocateCopy<char>(Str.data(), Length);
+ return StringRef(P, Length);
+ }
+
+ /// Copy a ArrayRef<T> by allocating copy in BumpPtrAllocator.
+ template <typename T>
+ typename enable_if<isPodLike<T>, ArrayRef<T> >::type
+ allocateCopy(ArrayRef<T> Src) {
+ size_t Length = Src.size();
+ T *P = allocateCopy<T>(Src.data(), Length);
+ return makeArrayRef(P, Length);
+ }
+
+ /// Compute the total physical memory allocated by this allocator.
+ size_t getTotalMemory() const;
};
/// SpecificBumpPtrAllocator - Same as BumpPtrAllocator but allows only
class SpecificBumpPtrAllocator {
BumpPtrAllocator Allocator;
public:
- SpecificBumpPtrAllocator(size_t size = 4096, size_t threshold = 4096,
- SlabAllocator &allocator = BumpPtrAllocator::DefaultSlabAllocator)
+ SpecificBumpPtrAllocator(size_t size = 4096, size_t threshold = 4096)
+ : Allocator(size, threshold) {}
+ SpecificBumpPtrAllocator(size_t size, size_t threshold,
+ SlabAllocator &allocator)
: Allocator(size, threshold, allocator) {}
~SpecificBumpPtrAllocator() {