StackAllocator.h

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#ifndef included_StackAllocator
#define included_StackAllocator
 
 
#include <cstdint>
#include <functional>
#include <stdlib.h>
 
 
class StackAllocator
{
public:
    explicit StackAllocator( size_t bytes,
                             size_t blockSize                          = 1024,
                             std::function<void *( size_t )> allocator = ::malloc,
                             std::function<void( void * )> deallocator = ::free );
 
    StackAllocator();
 
    ~StackAllocator();
 
    // Copy/assignment constructors
    StackAllocator( const StackAllocator & ) = delete;
    StackAllocator &operator=( const StackAllocator & ) = delete;
    StackAllocator( StackAllocator && );
    StackAllocator &operator=( StackAllocator && );
 
    void *allocate( size_t bytes );
 
    void deallocate( void *p, size_t bytes );
 
    static constexpr bool isLIFO() { return true; }
 
private:
    // Member data
    uint8_t d_blockSize;  // Blocksize stored as 2^n
    uint32_t d_available; // Number of blocks availible
    uint32_t d_N;         // Number of current allocations
    uint32_t d_capacity;  // Number of available allocations
    void *d_memory;       // Raw memory pointer
    void **d_ptr;         // Array of pointers allocated
    std::function<void *( size_t )> d_allocator;
    std::function<void( void * )> d_deallocator;
};
 
 
#endif