Handles with generation

handle.c

#define HANDLE_SIZE 32
#define HANDLE_GEN_BITS 8

static const uint32_t handleIndexMask32 = (1 << (32 - HANDLE_GEN_BITS)) - 1;
static const uint32_t handleGenMask32 = ((1 << HANDLE_GEN_BITS) - 1);
static const uint32_t handleGenShift32 = (32 - HANDLE_GEN_BITS);

#define _handleIndex32(HANDLE) ((ui_u32)((HANDLE) & handleIndexMask32))
#define handleGeneration32(HANDLE) ((ui_u8)(((HANDLE) >> handleGenShift32) & handleGenMask32))
#define handleSameGeneration32(HANDLE, GENERATION) (((uint8_t)(((HANDLE) >> handleGenShift32) & handleGenShift32)) == (GENERATION % 255))
#define handleMake32(GENERATION, INDEX) ((ui_u32) ((((ui_u32)(GENERATION) & handleGenMask32) << handleGenShift32) | ((ui_u32)(INDEX) & handleIndexMask32)))

// index starts from 1 so if the handles is zero it can be counted as invalid
#define handleIndex32(WHANDLE) (_handleIndex32(WHANDLE.id) - 1)