/usr/include/directfb/fusion/ref.h is in libdirectfb-dev 1.7.7-8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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(c) Copyright 2012-2013 DirectFB integrated media GmbH
(c) Copyright 2001-2013 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 Shimokawa <andi@directfb.org>,
Marek Pikarski <mass@directfb.org>,
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__REF_H__
#define __FUSION__REF_H__
#include <direct/thread.h>
#include <fusion/types.h>
#include <fusion/call.h>
#include <fusion/lock.h>
typedef struct {
/* multi app */
struct {
int id;
FusionWorldShared *shared;
FusionID creator;
/* builtin impl */
struct {
int local;
int global;
FusionSkirmish lock;
FusionCall *call;
int call_arg;
} builtin;
bool user;
} multi;
/* single app */
struct {
int refs;
DirectWaitQueue cond;
DirectMutex lock;
int dead;
bool destroyed;
int locked;
FusionCall *call;
int call_arg;
} single;
} FusionRef;
/*
* Initialize.
*/
DirectResult FUSION_API fusion_ref_init (FusionRef *ref,
const char *name,
const FusionWorld *world);
DirectResult FUSION_API fusion_ref_init2 (FusionRef *ref,
const char *name,
bool user,
const FusionWorld *world);
DirectResult FUSION_API fusion_ref_set_name (FusionRef *ref,
const char *name);
/*
* Lock, increase, unlock.
*/
DirectResult FUSION_API fusion_ref_up (FusionRef *ref, bool global);
/*
* Lock, decrease, unlock.
*/
DirectResult FUSION_API fusion_ref_down (FusionRef *ref, bool global);
/*
* Catch reference
*/
DirectResult FUSION_API fusion_ref_catch (FusionRef *ref);
/*
* Throw reference
*/
DirectResult FUSION_API fusion_ref_throw (FusionRef *ref, FusionID catcher);
/*
* Get the current reference count. Meant for debugging only.
* This value is not reliable, because no locking will be performed
* and the value may change after or even while returning it.
*/
DirectResult FUSION_API fusion_ref_stat (FusionRef *ref, int *refs);
/*
* Wait for zero and lock.
*/
DirectResult FUSION_API fusion_ref_zero_lock (FusionRef *ref);
/*
* Check for zero and lock if true.
*/
DirectResult FUSION_API fusion_ref_zero_trylock (FusionRef *ref);
/*
* Unlock the counter.
* Only to be called after successful zero_lock or zero_trylock.
*/
DirectResult FUSION_API fusion_ref_unlock (FusionRef *ref);
/*
* Have the call executed when reference counter reaches zero.
*/
DirectResult FUSION_API fusion_ref_watch (FusionRef *ref,
FusionCall *call,
int call_arg);
/*
* Inherit local reference count from another reference.
*
* The local count of the other reference (and its inherited references) is added to this reference.
*/
DirectResult FUSION_API fusion_ref_inherit (FusionRef *ref,
FusionRef *from);
DirectResult FUSION_API fusion_ref_set_sync (FusionRef *ref);
/*
* Deinitialize.
* Can be called after successful zero_lock or zero_trylock
* so that waiting fusion_ref_up calls return with DR_DESTROYED.
*/
DirectResult FUSION_API fusion_ref_destroy (FusionRef *ref);
typedef enum {
FUSION_REF_PERMIT_NONE = 0x00000000,
FUSION_REF_PERMIT_REF_UNREF_LOCAL = 0x00000001,
FUSION_REF_PERMIT_REF_UNREF_GLOBAL = 0x00000002,
FUSION_REF_PERMIT_ZERO_LOCK_UNLOCK = 0x00000004,
FUSION_REF_PERMIT_WATCH = 0x00000008,
FUSION_REF_PERMIT_INHERIT = 0x00000010,
FUSION_REF_PERMIT_DESTROY = 0x00000020,
FUSION_REF_PERMIT_CATCH = 0x00000040,
FUSION_REF_PERMIT_THROW = 0x00000080,
FUSION_REF_PERMIT_ALL = 0x000000FF
} FusionRefPermissions;
/*
* Give permissions to another fusionee to use the reference.
*/
DirectResult FUSION_API fusion_ref_add_permissions( FusionRef *ref,
FusionID fusion_id,
FusionRefPermissions permissions );
#endif
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