Changes in directory llvm/include/llvm/Support:
Allocator.h added (r1.1)
---
Log message:
Add a new llvm::Allocator abstraction, which will be used by a container
I'm about to add. This is similar to, but necessarily different than, the
STL allocator class.
---
Diffs of the changes: (+48 -0)
Allocator.h | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 48 insertions(+)
Index: llvm/include/llvm/Support/Allocator.h
diff -c /dev/null llvm/include/llvm/Support/Allocator.h:1.1
*** /dev/null Sun Oct 29 16:08:13 2006
--- llvm/include/llvm/Support/Allocator.h Sun Oct 29 16:08:03 2006
***************
*** 0 ****
--- 1,48 ----
+ //===--- Allocator.h - Simple memory allocation abstraction -----*- C++
-*-===//
+ //
+ // The LLVM Compiler Infrastructure
+ //
+ // This file was developed by Chris Lattner and is distributed under
+ // the University of Illinois Open Source License. See LICENSE.TXT for
details.
+ //
+
//===----------------------------------------------------------------------===//
+ //
+ // This file defines the MallocAllocator and BumpPtrAllocator interfaces.
+ //
+
//===----------------------------------------------------------------------===//
+
+ #ifndef LLVM_SUPPORT_ALLOCATOR_H
+ #define LLVM_SUPPORT_ALLOCATOR_H
+
+ #include <cstdlib>
+
+ namespace llvm {
+
+ class MallocAllocator {
+ public:
+ MallocAllocator() {}
+ ~MallocAllocator() {}
+
+ void *Allocate(unsigned Size, unsigned Alignment) { return malloc(Size); }
+ void Deallocate(void *Ptr) { free(Ptr); }
+ void PrintStats() const {}
+ };
+
+ /// BumpPtrAllocator - This allocator is useful for containers that need very
+ /// simple memory allocation strategies. In particular, this just keeps
+ /// 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 {
+ void *TheMemory;
+ public:
+ BumpPtrAllocator();
+ ~BumpPtrAllocator();
+
+ void *Allocate(unsigned Size, unsigned Alignment);
+ void Deallocate(void *Ptr) {}
+ void PrintStats() const;
+ };
+
+ } // end namespace clang
+
+ #endif
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