63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/*
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* \brief Linux kernel API
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* \author Norman Feske
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* \author Sebastian Sumpf
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* \author Josef Soentgen
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* \author Christian Helmuth
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* \date 2014-08-21
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*
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* Based on the prototypes found in the Linux kernel's 'include/'.
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*/
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/*
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* Copyright (C) 2014-2017 Genode Labs GmbH
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*
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* This file is distributed under the terms of the GNU General Public License
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* version 2.
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*/
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/*******************
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** linux/mutex.h **
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*******************/
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struct mutex
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{
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int state;
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void *holder;
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void *waiters;
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unsigned counter;
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unsigned id; /* for debugging */
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};
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#define DEFINE_MUTEX(mutexname) \
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struct mutex lx_mutex_ ## mutexname; \
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void lx_mutex_init_ ## mutexname(void) \
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{ mutex_init(&lx_mutex_ ## mutexname); }
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/*
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* Note, you must define a rename for 'mutexname' in lx_emul.h and explicitly
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* call the LX_MUTEX_INIT() initializer on startup.
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*
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* lx_emul.h:
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*
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* LX_MUTEX_INIT_DECLARE(mutexname)
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* #define mutexname LX_MUTEX(mutexname)
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*
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* lx_emul.cc:
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*
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* LX_MUTEX_INIT(mutexname);
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*/
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#define LX_MUTEX(mutexname) lx_mutex_ ## mutexname
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#define LX_MUTEX_INIT(mutexname) lx_mutex_init_ ## mutexname()
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#define LX_MUTEX_INIT_DECLARE(mutexname) extern void LX_MUTEX_INIT(mutexname)
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void mutex_init(struct mutex *m);
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void mutex_destroy(struct mutex *m);
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void mutex_lock(struct mutex *m);
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void mutex_unlock(struct mutex *m);
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int mutex_trylock(struct mutex *m);
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int mutex_is_locked(struct mutex *m);
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/* special case in net/wireless/util.c:1357 */
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#define mutex_lock_nested(lock, subclass) mutex_lock(lock)
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