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Diffstat (limited to 'ipc/kdbus/queue.h')
| -rw-r--r-- | ipc/kdbus/queue.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/ipc/kdbus/queue.h b/ipc/kdbus/queue.h new file mode 100644 index 000000000..bf686d182 --- /dev/null +++ b/ipc/kdbus/queue.h @@ -0,0 +1,84 @@ +/* + * Copyright (C) 2013-2015 Kay Sievers + * Copyright (C) 2013-2015 Greg Kroah-Hartman <gregkh@linuxfoundation.org> + * Copyright (C) 2013-2015 Daniel Mack <daniel@zonque.org> + * Copyright (C) 2013-2015 David Herrmann <dh.herrmann@gmail.com> + * Copyright (C) 2013-2015 Linux Foundation + * Copyright (C) 2014-2015 Djalal Harouni <tixxdz@opendz.org> + * + * kdbus is free software; you can redistribute it and/or modify it under + * the terms of the GNU Lesser General Public License as published by the + * Free Software Foundation; either version 2.1 of the License, or (at + * your option) any later version. + */ + +#ifndef __KDBUS_QUEUE_H +#define __KDBUS_QUEUE_H + +#include <linux/list.h> +#include <linux/rbtree.h> + +struct kdbus_conn; +struct kdbus_pool_slice; +struct kdbus_reply; +struct kdbus_staging; +struct kdbus_user; + +/** + * struct kdbus_queue - a connection's message queue + * @msg_list: List head for kdbus_queue_entry objects + * @msg_prio_queue: RB tree root for messages, sorted by priority + * @msg_prio_highest: Link to the RB node referencing the message with the + * highest priority in the tree. + */ +struct kdbus_queue { + struct list_head msg_list; + struct rb_root msg_prio_queue; + struct rb_node *msg_prio_highest; +}; + +/** + * struct kdbus_queue_entry - messages waiting to be read + * @entry: Entry in the connection's list + * @prio_node: Entry in the priority queue tree + * @prio_entry: Queue tree node entry in the list of one priority + * @priority: Message priority + * @dst_name_id: The sequence number of the name this message is + * addressed to, 0 for messages sent to an ID + * @conn: Connection this entry is queued on + * @gaps: Gaps object to fill message gaps at RECV time + * @user: User used for accounting + * @slice: Slice in the receiver's pool for the message + * @reply: The reply block if a reply to this message is expected + */ +struct kdbus_queue_entry { + struct list_head entry; + struct rb_node prio_node; + struct list_head prio_entry; + + s64 priority; + u64 dst_name_id; + + struct kdbus_conn *conn; + struct kdbus_gaps *gaps; + struct kdbus_user *user; + struct kdbus_pool_slice *slice; + struct kdbus_reply *reply; +}; + +void kdbus_queue_init(struct kdbus_queue *queue); +struct kdbus_queue_entry *kdbus_queue_peek(struct kdbus_queue *queue, + s64 priority, bool use_priority); + +struct kdbus_queue_entry *kdbus_queue_entry_new(struct kdbus_conn *src, + struct kdbus_conn *dst, + struct kdbus_staging *s); +void kdbus_queue_entry_free(struct kdbus_queue_entry *entry); +int kdbus_queue_entry_install(struct kdbus_queue_entry *entry, + u64 *return_flags, bool install_fds); +void kdbus_queue_entry_enqueue(struct kdbus_queue_entry *entry, + struct kdbus_reply *reply); +int kdbus_queue_entry_move(struct kdbus_queue_entry *entry, + struct kdbus_conn *dst); + +#endif /* __KDBUS_QUEUE_H */ |