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
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
/*
(c) Copyright 2001-2009 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Hundt <andi@fischlustig.de>,
Sven Neumann <neo@directfb.org>,
Ville Syrjälä <syrjala@sci.fi> and
Claudio Ciccani <klan@users.sf.net>.
This library 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 of the License, or (at your option) any later version.
This library 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 library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#ifndef __FUSION__PROPERTY_H__
#define __FUSION__PROPERTY_H__
#include <pthread.h>
#include <fusion/types.h>
typedef enum {
FUSION_PROPERTY_AVAILABLE,
FUSION_PROPERTY_LEASED,
FUSION_PROPERTY_PURCHASED
} FusionPropertyState;
typedef union {
/* multi app */
struct {
int id;
const FusionWorldShared *shared;
/* builtin impl */
struct {
FusionPropertyState state;
pid_t owner;
bool requested;
bool destroyed;
} builtin;
} multi;
/* single app */
struct {
pthread_mutex_t lock;
pthread_cond_t cond;
FusionPropertyState state;
} single;
} FusionProperty;
/*
* Initializes the property
*/
DirectResult fusion_property_init (FusionProperty *property,
const FusionWorld *world);
/*
* Lease the property causing others to wait before leasing or purchasing.
*
* Waits as long as property is leased by another party.
* Returns DR_BUSY if property is/gets purchased by another party.
*
* Succeeds if property is available,
* puts the property into 'leased' state.
*/
DirectResult fusion_property_lease (FusionProperty *property);
/*
* Purchase the property disallowing others to lease or purchase it.
*
* Waits as long as property is leased by another party.
* Returns DR_BUSY if property is/gets purchased by another party.
*
* Succeeds if property is available,
* puts the property into 'purchased' state and wakes up any waiting party.
*/
DirectResult fusion_property_purchase (FusionProperty *property);
/*
* Cede the property allowing others to lease or purchase it.
*
* Puts the property into 'available' state and wakes up one waiting party.
*/
DirectResult fusion_property_cede (FusionProperty *property);
/*
* Kills the owner of the property.
*
* Tries to make a purchased property available again by killing
* the process that purchased it.
*/
DirectResult fusion_property_holdup (FusionProperty *property);
/*
* Destroys the property
*/
DirectResult fusion_property_destroy (FusionProperty *property);
#endif
|
