Function autoMemoryFreed

app/redis-6.2.6/src/module.c:1061–1089

Mark an object as freed in the auto release queue, so that users can still * free things manually if they want. * * The function returns 1 if the object was actually found in the auto memory * pool, otherwise 0 is returned. */

 * The function returns 1 if the object was actually found in the auto memory
 * pool, otherwise 0 is returned. */
int autoMemoryFreed(RedisModuleCtx *ctx, int type, void *ptr) {
    if (!(ctx->flags & REDISMODULE_CTX_AUTO_MEMORY)) return 0;

    int count = (ctx->amqueue_used+1)/2;
    for (int j = 0; j < count; j++) {
        for (int side = 0; side < 2; side++) {
            /* For side = 0 check right side of the array, for
             * side = 1 check the left side instead (zig-zag scanning). */
            int i = (side == 0) ? (ctx->amqueue_used - 1 - j) : j;
            if (ctx->amqueue[i].type == type &&
                ctx->amqueue[i].ptr == ptr)
            {
                ctx->amqueue[i].type = REDISMODULE_AM_FREED;

                /* Switch the freed element and the last element, to avoid growing
                 * the queue unnecessarily if we allocate/free in a loop */
                if (i != ctx->amqueue_used-1) {
                    ctx->amqueue[i] = ctx->amqueue[ctx->amqueue_used-1];
                }

                /* Reduce the size of the queue because we either moved the top
                 * element elsewhere or freed it */
                ctx->amqueue_used--;
                return 1;
            }
        }
    }
    return 0;
}

/* Release all the objects in queue. */
void autoMemoryCollect(RedisModuleCtx *ctx) {