void iio_buffer_destroy(struct iio_buffer *buffer)
{
iio_device_close(buffer->dev);
if (!buffer->dev_is_high_speed)
free(buffer->buffer);
free(buffer->mask);
free(buffer);
}
static void local_shutdown(struct iio_context *ctx)
{
/* Free the backend data stored in every device structure */
unsigned int i;
for (i = 0; i < ctx->nb_devices; i++) {
struct iio_device *dev = ctx->devices[i];
iio_device_close(dev);
local_free_pdata(dev);
}
free(ctx->pdata);
}
struct iio_buffer * iio_device_create_buffer(const struct iio_device *dev,
size_t samples_count, bool cyclic)
{
int ret = -EINVAL;
struct iio_buffer *buf;
unsigned int sample_size = iio_device_get_sample_size(dev);
if (!sample_size)
goto err_set_errno;
buf = malloc(sizeof(*buf));
if (!buf) {
ret = -ENOMEM;
goto err_set_errno;
}
buf->dev_sample_size = sample_size;
buf->length = sample_size * samples_count;
buf->dev = dev;
buf->mask = calloc(dev->words, sizeof(*buf->mask));
if (!buf->mask) {
ret = -ENOMEM;
goto err_free_buf;
}
/* Set the default channel mask to the one used by the device.
* While input buffers will erase this as soon as the refill function
* is used, it is useful for output buffers, as it permits
* iio_buffer_foreach_sample to be used. */
memcpy(buf->mask, dev->mask, dev->words * sizeof(*buf->mask));
ret = iio_device_open(dev, samples_count, cyclic);
if (ret < 0)
goto err_free_mask;
buf->dev_is_high_speed = device_is_high_speed(dev);
if (buf->dev_is_high_speed) {
/* Dequeue the first buffer, so that buf->buffer is correctly
* initialized */
buf->buffer = NULL;
if (iio_device_is_tx(dev)) {
ret = dev->ctx->ops->get_buffer(dev, &buf->buffer,
buf->length, buf->mask, dev->words);
if (ret < 0)
goto err_close_device;
}
} else {
buf->buffer = malloc(buf->length);
if (!buf->buffer) {
ret = -ENOMEM;
goto err_close_device;
}
}
buf->sample_size = iio_device_get_sample_size_mask(dev,
buf->mask, dev->words);
buf->data_length = buf->length;
return buf;
err_close_device:
iio_device_close(dev);
err_free_mask:
free(buf->mask);
err_free_buf:
free(buf);
err_set_errno:
errno = -ret;
return NULL;
}
