/usr/include/directfb/fusion/property.h is in libdirectfb-dev 1.2.10.0-8+deb9u1.
This file is owned by root:root, with mode 0o644.
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(c) Copyright 2001-2008 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
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