core/seq/seq_clientmgr.c

48 /* dynamically allocated client numbers (both kernel drivers and user space) */
323 /* create a user client */
328 	struct snd_seq_user_client *user;
348 	user = &client->data.user;
349 	user->fifo = NULL;
350 	user->fifo_pool_size = 0;
353 		user->fifo_pool_size = SNDRV_SEQ_DEFAULT_CLIENT_EVENTS;
354 		user->fifo = snd_seq_fifo_new(user->fifo_pool_size);
355 		if (user->fifo == NULL) {
371 	user->file = file;
373 	client->data.user.owner = get_pid(task_pid(current));
381 /* delete a user client */
388 		if (client->data.user.fifo)
389 			snd_seq_fifo_delete(&client->data.user.fifo);
393 		put_pid(client->data.user.owner);
414  *	-EINVAL	no enough user-space buffer to write the whole event
415  *	-EFAULT	seg. fault during copy to user space
439 	fifo = client->data.user.fifo;
556  * If the receiver client is a user client, the original event is
632 		if (!dest->data.user.fifo)
634 		return snd_seq_fifo_event_in(dest->data.user.fifo, event);
987  *	-EFAULT	seg. fault during copy from user space
1026 		/* Read in the event header from the user */
1073 			/* set user space pointer */
1125 	    client->data.user.fifo) {
1128 		if (snd_seq_fifo_poll_wait(client->data.user.fifo, file, wait))
1236 		info->pid = pid_vnr(cptr->data.user.owner);
1460  * send an subscription notify event to user client:
1461  * client must be user client.
1863 		info->input_pool = cptr->data.user.fifo_pool_size;
1865 		info->input_free = snd_seq_fifo_unused_cells(cptr->data.user.fifo);
1901 	if (client->type == USER_CLIENT && client->data.user.fifo != NULL &&
1904 	    info->input_pool != client->data.user.fifo_pool_size) {
1906 		rc = snd_seq_fifo_resize(client->data.user.fifo, info->input_pool);
1909 		client->data.user.fifo_pool_size = info->input_pool;
1931 		 * No restrictions so for a user client we can clear
1934 		if (client->type == USER_CLIENT && client->data.user.fifo)
1935 			snd_seq_fifo_clear(client->data.user.fifo);
2694 		if (client->type == USER_CLIENT && client->data.user.fifo &&
2695 		    client->data.user.fifo->pool) {
2697 			snd_seq_info_pool(buffer, client->data.user.fifo->pool, "    ");