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Diffstat (limited to 'Source/DirectFB/lib/fusion/lock.h')
| -rwxr-xr-x | Source/DirectFB/lib/fusion/lock.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/Source/DirectFB/lib/fusion/lock.h b/Source/DirectFB/lib/fusion/lock.h new file mode 100755 index 0000000..d5071bb --- /dev/null +++ b/Source/DirectFB/lib/fusion/lock.h @@ -0,0 +1,122 @@ +/* + (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__LOCK_H__ +#define __FUSION__LOCK_H__ + +#include <pthread.h> + +#include <fusion/types.h> + +#include <direct/messages.h> +#include <direct/util.h> + + +typedef union { + /* multi app */ + struct { + int id; + const FusionWorldShared *shared; + /* builtin impl */ + struct { + unsigned int locked; + pid_t owner; + DirectLink *waiting; + bool requested; + bool destroyed; + } builtin; + } multi; + + /* single app */ + struct { + pthread_mutex_t lock; + pthread_cond_t cond; + int count; + } single; +} FusionSkirmish; + +/* + * Initialize. + */ +DirectResult fusion_skirmish_init ( FusionSkirmish *skirmish, + const char *name, + const FusionWorld *world ); + +/* + * Lock. + */ +DirectResult fusion_skirmish_prevail( FusionSkirmish *skirmish ); + +/* + * Try lock. + */ +DirectResult fusion_skirmish_swoop ( FusionSkirmish *skirmish ); + +/* + * Find out how many times current thread has acquired lock. + */ +DirectResult fusion_skirmish_lock_count( FusionSkirmish *skirmish, int *lock_count ); + +/* + * Unlock. + */ +DirectResult fusion_skirmish_dismiss( FusionSkirmish *skirmish ); + +/* + * Deinitialize. + */ +DirectResult fusion_skirmish_destroy( FusionSkirmish *skirmish ); + +/* + * Wait & Notify. + * + * Must be locked! + */ +DirectResult fusion_skirmish_wait ( FusionSkirmish *skirmish, + unsigned int timeout ); +DirectResult fusion_skirmish_notify ( FusionSkirmish *skirmish ); + + +#if D_DEBUG_ENABLED +#define FUSION_SKIRMISH_ASSERT(skirmish) \ + do { \ + int lock_count; \ + \ + D_ASSERT( skirmish != NULL ); \ + \ + D_ASSERT( fusion_skirmish_lock_count( skirmish, &lock_count ) == DR_OK ); \ + D_ASSERT( lock_count > 0 ); \ + } while (0) +#else +#define FUSION_SKIRMISH_ASSERT(skirmish) \ + do { \ + } while (0) +#endif + +#endif + |