arena_p.h

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// Software Rendering Pipeline (SRP) library
// Licensed under GNU GPLv3
 
#pragma once
 
#include <stddef.h>
#include "srp/context.h"
 
#define SRP_DEFAULT_ARENA_CAPACITY (1024 * 1024)  // 1 MiB
 
typedef struct SRPArenaBlock {
    struct SRPArenaBlock* next;  
    size_t capacity;             
    size_t used;                 
    unsigned char data[];        
} SRPArenaBlock;
 
typedef struct SRPArena {
    SRPArenaBlock* head;     
    SRPArenaBlock* current;  
    size_t pageSize;         
} SRPArena;
 
SRPArena* newArena(size_t capacity);
 
void freeArena(SRPArena* this);
 
void* arenaAlloc(SRPArena* this, size_t size);
 
void* arenaCalloc(SRPArena* this, size_t size);
 
void arenaReset(SRPArena* this);
 
// Macros to manipulate context-stored arena
#define ARENA_ALLOC(size) (arenaAlloc(srpContext.arena, (size)))
#define ARENA_CALLOC(size) (arenaCalloc(srpContext.arena, (size)))
#define ARENA_RESET() (arenaReset(srpContext.arena))