C++ (Cpp) snd_receive_fd Examples

Example #1

File: pcm_shm.c Project: xenyinzen/lx_toolset

static long snd_pcm_shm_action_fd(snd_pcm_t *pcm, int *fd)
{
	snd_pcm_shm_t *shm = pcm->private_data;
	int err;
	char buf[1];
	volatile snd_pcm_shm_ctrl_t *ctrl = shm->ctrl;

	if (ctrl->hw.changed || ctrl->appl.changed)
		return -EBADFD;
	err = write(shm->socket, buf, 1);
	if (err != 1)
		return -EBADFD;
	err = snd_receive_fd(shm->socket, buf, 1, fd);
	if (err != 1)
		return -EBADFD;
	if (ctrl->cmd) {
		SNDERR("Server has not done the cmd");
		return -EBADFD;
	}
	if (ctrl->hw.changed) {
		err = snd_pcm_shm_new_rbptr(pcm, shm, &pcm->hw, &ctrl->hw);
		if (err < 0)
			return err;
		ctrl->hw.changed = 0;
	}
	if (ctrl->appl.changed) {
		err = snd_pcm_shm_new_rbptr(pcm, shm, &pcm->appl, &ctrl->appl);
		if (err < 0)
			return err;
		ctrl->appl.changed = 0;
	}
	return ctrl->result;
}

Example #2

File: control_shm.c Project: 11Alex11/CS488-A5

static int snd_ctl_shm_action_fd(snd_ctl_t *ctl, int *fd)
{
	snd_ctl_shm_t *shm = ctl->private_data;
	int err;
	char buf[1];
	volatile snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
	err = write(shm->socket, buf, 1);
	if (err != 1)
		return -EBADFD;
	err = snd_receive_fd(shm->socket, buf, 1, fd);
	if (err != 1)
		return -EBADFD;
	if (ctrl->cmd) {
		SNDERR("Server has not done the cmd");
		return -EBADFD;
	}
	return ctrl->result;
}

Example #3

File: pcm_direct.c Project: Distrotech/alsa-lib

int snd_pcm_direct_client_connect(snd_pcm_direct_t *dmix)
{
	int ret;
	unsigned char buf;

	ret = make_local_socket(dmix->shmptr->socket_name, 0, -1, -1);
	if (ret < 0)
		return ret;
	dmix->comm_fd = ret;

	ret = snd_receive_fd(dmix->comm_fd, &buf, 1, &dmix->hw_fd);
	if (ret < 1 || buf != 'A') {
		close(dmix->comm_fd);
		dmix->comm_fd = -1;
		return ret;
	}

	dmix->client = 1;
	return 0;
}