Function av_refstruct_pool_alloc_ext_c

libavutil/refstruct.c:340–386

}

AVRefStructPool *av_refstruct_pool_alloc_ext_c(size_t size, unsigned flags,
                                               AVRefStructOpaque opaque,
                                               int  (*init_cb)(AVRefStructOpaque opaque, void *obj),
                                               void (*reset_cb)(AVRefStructOpaque opaque, void *obj),
                                               void (*free_entry_cb)(AVRefStructOpaque opaque, void *obj),
                                               void (*free_cb)(AVRefStructOpaque opaque))
{
    AVRefStructPool *pool = av_refstruct_alloc_ext(sizeof(*pool), 0, NULL,
                                                   refstruct_pool_uninit);
    int err;

    if (!pool)
        return NULL;
    get_refcount(pool)->free = pool_unref;

    pool->size          = size;
    pool->opaque        = opaque;
    pool->init_cb       = init_cb;
    pool->reset_cb      = reset_cb;
    pool->free_entry_cb = free_entry_cb;
    pool->free_cb       = free_cb;
#define COMMON_FLAGS AV_REFSTRUCT_POOL_FLAG_NO_ZEROING
    pool->entry_flags   = flags & COMMON_FLAGS;
    // Filter out nonsense combinations to avoid checks later.
    if (!pool->reset_cb)
        flags &= ~AV_REFSTRUCT_POOL_FLAG_RESET_ON_INIT_ERROR;
    if (!pool->free_entry_cb)
        flags &= ~AV_REFSTRUCT_POOL_FLAG_FREE_ON_INIT_ERROR;
    pool->pool_flags    = flags;

    if (flags & AV_REFSTRUCT_POOL_FLAG_ZERO_EVERY_TIME) {
        // We will zero the buffer before every use, so zeroing
        // upon allocating the buffer is unnecessary.
        pool->entry_flags |= AV_REFSTRUCT_FLAG_NO_ZEROING;
    }

    atomic_init(&pool->refcount, 1);

    err = ff_mutex_init(&pool->mutex, NULL);
    if (err) {
        // Don't call av_refstruct_uninit() on pool, as it hasn't been properly
        // set up and is just a POD right now.
        av_free(get_refcount(pool));
        return NULL;
    }
    return pool;
}