alloc.h

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#ifndef ARCH_ALLOCATOR_HEADER
#define ARCH_ALLOCATOR_HEADER
#include <stddef.h>
#include "conf.h"
#include "arax_types.h"
#include <utils/bitmap.h>
 
#ifdef __cplusplus
extern "C" {
#endif /* ifdef __cplusplus */
 
typedef void *arch_alloc_state;
 
/*
 * TODO:Add canarry
 */
struct arch_alloc_s
{
    #ifdef ALLOC_STATS
    size_t allocs[2];   // < Number of arch_alloc_allocate(failed/successfull).
    size_t frees;       // < Number of arch_alloc_free.
    size_t alloc_ns[2]; // < Cumulative nanoseconds spend in alloc(failed/successful).
    size_t free_ns;     // < Cumulative nanoseconds spend in free.
    #else
    // This padd is necessary as empty struct have sizeof == 1 in C++, but 0 in C
    char   padd;
    #endif
};

int arch_alloc_init_once(arch_alloc_s *alloc, size_t size);

void arch_alloc_init_always(arch_alloc_s *alloc);

void* arch_alloc_allocate(arch_alloc_s *alloc, size_t size);
 
void _arch_alloc_free(arch_alloc_s *alloc, void *mem);

#define arch_alloc_free(ALLOC, MEM)  \
    ({                              \
        _arch_alloc_free(ALLOC, MEM); \
        MEM = 0;                    \
    })

void arch_alloc_exit(arch_alloc_s *alloc);
 
typedef struct
{
    size_t total_bytes; // <Bytes available for user data AND allocator metadata.
    size_t used_bytes;  // <Bytes used for user data AND allocator metadata.
    #ifdef ALLOC_STATS
    size_t allocs[2];   // < Number of arch_alloc_allocate(failed/successful).
    size_t frees;       // < Number of arch_alloc_free.
    size_t alloc_ns[2]; // < Cumulative nanoseconds spend in alloc(failed/successful).
    size_t free_ns;     // < Cumulative nanoseconds spend in free.
    #endif
} arch_alloc_stats_s;
 
arch_alloc_stats_s arch_alloc_stats(arch_alloc_s *alloc);
 
void arch_alloc_inspect(arch_alloc_s *alloc, void (*inspector)(void *start, void *end, size_t size,
  void *arg), void *arg);

void* arax_mmap(size_t s);

void* arax_ummap(void *a, size_t s);

arch_alloc_s* arch_alloc_create_sub_alloc(arch_alloc_s *parent);
 
utils_bitmap_s* arch_alloc_get_bitmap();
#ifdef __cplusplus
}
#endif /* ifdef __cplusplus */
 
#endif /* ifndef ARCH_ALLOCATOR_HEADER */