kmem_slab_simple.h

Go to the documentation of this file.

// AUTOMATICALLY GENERATED -- DO NOT EDIT!         -*- c++ -*-

#ifndef kmem_slab_simple_h
#define kmem_slab_simple_h

#include <stddef.h>             // size_t
#include "helping_lock.h"       // Helping_lock

#include "slab_cache_anon.h"            // slab_cache_anon

//
// INTERFACE definition follows 
//


class Kmem_slab_simple : public slab_cache_anon
{
  // DATA
  Helping_lock _lock;

public:  
  // We only support slab size == PAGE_SIZE.
  Kmem_slab_simple(unsigned elem_size, unsigned alignment);
  
  ~Kmem_slab_simple();
  
  // We overwrite some of slab_cache_anon's functions to faciliate locking.
  void * alloc();               // request initialized member from cache
  
  void free(void *cache_entry); // return initialized member to cache
  
  bool reap();
  
  void * operator new(size_t size);
  
  void operator delete(void *block, size_t size);

protected:  
  // Specializations providing their own block_alloc()/block_free() can
  // also request slab sizes larger than one page.
  Kmem_slab_simple(unsigned long slab_size, unsigned elem_size, unsigned alignment);

private:  
  // Callback functions called by our super class, slab_cache_anon, to
  // allocate or free blocks
  virtual void * block_alloc(unsigned long size, unsigned long);
  
  virtual void block_free(void *block, unsigned long);
};

#endif // kmem_slab_simple_h

---