box2d_sys 0.2.1

Bindings for Box2D v3.0
Documentation 
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// SPDX-FileCopyrightText: 2023 Erin Catto
// SPDX-License-Identifier: MIT

#pragma once

#include "array.h"

typedef struct b2IdPool
{
	b2IntArray freeArray;
	int nextIndex;
} b2IdPool;

b2IdPool b2CreateIdPool();
void b2DestroyIdPool( b2IdPool* pool );

int b2AllocId( b2IdPool* pool );
void b2FreeId( b2IdPool* pool, int id );
void b2ValidateFreeId( b2IdPool* pool, int id );

static inline int b2GetIdCount( b2IdPool* pool )
{
	return pool->nextIndex - pool->freeArray.count;
}

static inline int b2GetIdCapacity( b2IdPool* pool )
{
	return pool->nextIndex;
}

static inline int b2GetIdBytes( b2IdPool* pool )
{
	return b2IntArray_ByteCount(&pool->freeArray);
}