129 lines
2.5 KiB
C
129 lines
2.5 KiB
C
/*
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* Copyright (C) 2012 Tobias Brunner
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <pthread.h>
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#include <library.h>
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#include <utils/debug.h>
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#include "spinlock.h"
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#include "mutex.h"
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#include "lock_profiler.h"
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typedef struct private_spinlock_t private_spinlock_t;
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/**
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* private data
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*/
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struct private_spinlock_t {
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/**
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* public functions
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*/
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spinlock_t public;
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#ifdef HAVE_PTHREAD_SPIN_INIT
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/**
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* wrapped pthread spin lock
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*/
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pthread_spinlock_t spinlock;
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/**
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* profiling info, if enabled (the mutex below does profile itself)
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*/
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lock_profile_t profile;
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#else /* HAVE_PTHREAD_SPIN_INIT */
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/**
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* use a mutex if spin locks are not available
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*/
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mutex_t *mutex;
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#endif /* HAVE_PTHREAD_SPIN_INIT */
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};
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METHOD(spinlock_t, lock, void,
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private_spinlock_t *this)
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{
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#ifdef HAVE_PTHREAD_SPIN_INIT
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int err;
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profiler_start(&this->profile);
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err = pthread_spin_lock(&this->spinlock);
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if (err)
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{
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DBG1(DBG_LIB, "!!! SPIN LOCK LOCK ERROR: %s !!!", strerror(err));
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}
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profiler_end(&this->profile);
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#else
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this->mutex->lock(this->mutex);
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#endif
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}
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METHOD(spinlock_t, unlock, void,
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private_spinlock_t *this)
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{
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#ifdef HAVE_PTHREAD_SPIN_INIT
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int err;
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err = pthread_spin_unlock(&this->spinlock);
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if (err)
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{
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DBG1(DBG_LIB, "!!! SPIN LOCK UNLOCK ERROR: %s !!!", strerror(err));
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}
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#else
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this->mutex->unlock(this->mutex);
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#endif
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}
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METHOD(spinlock_t, destroy, void,
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private_spinlock_t *this)
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{
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#ifdef HAVE_PTHREAD_SPIN_INIT
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profiler_cleanup(&this->profile);
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pthread_spin_destroy(&this->spinlock);
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#else
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this->mutex->destroy(this->mutex);
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#endif
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free(this);
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}
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/*
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* Described in header
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*/
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spinlock_t *spinlock_create()
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{
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private_spinlock_t *this;
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INIT(this,
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.public = {
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.lock = _lock,
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.unlock = _unlock,
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.destroy = _destroy,
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},
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);
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#ifdef HAVE_PTHREAD_SPIN_INIT
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pthread_spin_init(&this->spinlock, PTHREAD_PROCESS_PRIVATE);
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profiler_init(&this->profile);
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#else
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this->mutex = mutex_create(MUTEX_TYPE_DEFAULT);
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#endif
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return &this->public;
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}
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