/usr/include/directfb/fusion/fusion.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__FUSION_H__
#define __FUSION__FUSION_H__
#include <sys/types.h>
#include <direct/list.h>
#include <fusion/types.h>
typedef enum {
FER_ANY,
FER_MASTER,
FER_SLAVE
} FusionEnterRole;
typedef enum {
FFA_CLOSE,
FFA_FORK
} FusionForkAction;
typedef enum {
FFS_PREPARE,
FFS_PARENT,
FFS_CHILD
} FusionForkState;
typedef void (*FusionForkCallback) ( FusionForkAction action, FusionForkState state );
typedef void (*FusionLeaveCallback)( FusionWorld *world,
FusionID fusion_id,
void *ctx );
typedef void (*FusionDispatchCleanupFunc)( void *ctx );
typedef struct {
DirectLink link;
FusionDispatchCleanupFunc func;
void *ctx;
} FusionDispatchCleanup;
DirectResult FUSION_API fusion_dispatch_cleanup_add ( FusionWorld *world,
FusionDispatchCleanupFunc func,
void *ctx,
FusionDispatchCleanup **ret_cleanup );
DirectResult FUSION_API fusion_dispatch_cleanup_remove( FusionWorld *world,
FusionDispatchCleanup *cleanup );
/*
* Enters a fusion world by joining or creating it.
*
* If <b>world_index</b> is negative, the next free index is used to create a new world.
* Otherwise the world with the specified index is joined or created.
*/
DirectResult FUSION_API fusion_enter( int world_index,
int abi_version,
FusionEnterRole role,
FusionWorld **ret_world );
/*
* Exits the fusion world.
*
* If 'emergency' is true the function won't join but kill the dispatcher thread.
*/
DirectResult FUSION_API fusion_exit( FusionWorld *world,
bool emergency );
int FUSION_API fusion_fd( const FusionWorld *world );
DirectResult FUSION_API fusion_dispatch( FusionWorld *world,
size_t buf_size );
DirectResult FUSION_API fusion_stop_dispatcher( FusionWorld *world,
bool emergency );
/*
* Sets the fork() action of the calling Fusionee within the world.
*/
void FUSION_API fusion_world_set_fork_action( FusionWorld *world,
FusionForkAction action );
/*
* Gets the current fork() action.
*/
FusionForkAction FUSION_API fusion_world_get_fork_action( FusionWorld *world );
/*
* Registers a callback called upon fork().
*/
void FUSION_API fusion_world_set_fork_callback( FusionWorld *world,
FusionForkCallback callback );
/*
* Registers a callback called when a slave exits.
*/
void FUSION_API fusion_world_set_leave_callback( FusionWorld *world,
FusionLeaveCallback callback,
void *ctx );
/*
* Return the index of the specified world.
*/
int FUSION_API fusion_world_index( const FusionWorld *world );
/*
* Return the own Fusion ID within the specified world.
*/
FusionID FUSION_API fusion_id( const FusionWorld *world );
/*
* Return if the world is a multi application world.
*/
bool FUSION_API fusion_is_multi( const FusionWorld *world );
/*
* Return the thread ID of the Fusion Dispatcher within the specified world.
*/
pid_t FUSION_API fusion_dispatcher_tid( const FusionWorld *world );
/*
* Return true if this process is the master.
*/
bool FUSION_API fusion_master( const FusionWorld *world );
/*
* Wait until all pending messages are processed.
*/
DirectResult FUSION_API fusion_sync( const FusionWorld *world );
/*
* Unblock slaves from entering. Must be called once after fusion_enter as master.
*/
DirectResult FUSION_API fusion_world_activate( FusionWorld *world );
/*
* Sends a signal to one or more fusionees and optionally waits
* for their processes to terminate.
*
* A fusion_id of zero means all fusionees but the calling one.
* A timeout of zero means infinite waiting while a negative value
* means no waiting at all.
*/
DirectResult FUSION_API fusion_kill( FusionWorld *world,
FusionID fusion_id,
int signal,
int timeout_ms );
/* Check if a pointer points to the shared memory. */
bool FUSION_API fusion_is_shared( FusionWorld *world,
const void *ptr );
const char * FUSION_API fusion_get_tmpfs( FusionWorld *world );
/*
* Get the executable path of the Fusionee
*
* Returns DR_LIMITEXCEEDED when buf_size too small,
* with the required number of bytes returned in ret_size.
*/
DirectResult FUSION_API fusion_get_fusionee_path( const FusionWorld *world,
FusionID fusion_id,
char *buf,
size_t buf_size,
size_t *ret_size );
DirectResult FUSION_API fusion_get_fusionee_pid( const FusionWorld *world,
FusionID fusion_id,
pid_t *ret_pid );
DirectResult FUSION_API fusion_world_set_root( FusionWorld *world,
void *root );
void * FUSION_API fusion_world_get_root( FusionWorld *world );
#endif
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