blob: ea9dc08aaca818129eea390c6716605c4f83f99c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*
Copyright (c) 2009-2012 250bpm s.r.o.
Copyright (c) 2007-2009 iMatix Corporation
Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
This file is part of Crossroads I/O project.
Crossroads I/O 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 3 of the License, or
(at your option) any later version.
Crossroads is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __XS_MAILBOX_HPP_INCLUDED__
#define __XS_MAILBOX_HPP_INCLUDED__
#include "signaler.hpp"
#include "config.hpp"
#include "command.hpp"
#include "ypipe.hpp"
#include "mutex.hpp"
#include "fd.hpp"
namespace xs
{
// Mailbox stores a list of commands sent to a particular object.
// Multiple threads can send commands to the mailbox in parallel.
// Only a single thread can read commands from the mailbox.
typedef struct
{
// The pipe to store actual commands.
typedef ypipe_t <command_t, command_pipe_granularity> cpipe_t;
cpipe_t cpipe;
// Signaler to pass signals from writer thread to reader thread.
signaler_t signaler;
// There's only one thread receiving from the mailbox, but there
// is arbitrary number of threads sending. Given that ypipe requires
// synchronised access on both of its endpoints, we have to synchronise
// the sending side.
mutex_t sync;
// True if the underlying pipe is active, ie. when we are allowed to
// read commands from it.
bool active;
} mailbox_t;
int mailbox_init (mailbox_t *self_);
void mailbox_close (mailbox_t *self_);
fd_t mailbox_fd (mailbox_t *self_);
void mailbox_send (mailbox_t *self_, const command_t &cmd_);
int mailbox_recv (mailbox_t *self_, command_t *cmd_, int timeout_);
}
#endif
|
