sctp_process_lock.h

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/*-
 * Copyright (c) 2001-2007, by Cisco Systems, Inc. All rights reserved.
 * Copyright (c) 2008-2011, by Randall Stewart. All rights reserved.
 * Copyright (c) 2008-2011, by Michael Tuexen. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * a) Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * b) Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the distribution.
 *
 * c) Neither the name of Cisco Systems, Inc. nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifndef __sctp_process_lock_h__
#define __sctp_process_lock_h__

/*
 * Need to yet define five atomic fuctions or
 * their equivalant.
 * - atomic_add_int(&foo, val) - add atomically the value
 * - atomic_fetchadd_int(&foo, val) - does same as atomic_add_int
 *                    but value it was is returned.
 * - atomic_subtract_int(&foo, val) - can be made from atomic_add_int()
 *
 * - atomic_cmpset_int(&foo, value, newvalue) - Does a set of newvalue
 *                          in foo if and only if
 *                          foo is value. Returns 0
 *                          on success.
 */

#ifdef SCTP_PER_SOCKET_LOCKING
/*
 * per socket level locking
 */

#if defined(__Userspace_os_Windows)
/* Lock for INFO stuff */
#define SCTP_INP_INFO_LOCK_INIT()
#define SCTP_INP_INFO_RLOCK()
#define SCTP_INP_INFO_RUNLOCK()
#define SCTP_INP_INFO_WLOCK()
#define SCTP_INP_INFO_WUNLOCK()
#define SCTP_INP_INFO_LOCK_DESTROY()
#define SCTP_IPI_COUNT_INIT()
#define SCTP_IPI_COUNT_DESTROY()
#else
#define SCTP_INP_INFO_LOCK_INIT()
#define SCTP_INP_INFO_RLOCK()
#define SCTP_INP_INFO_RUNLOCK()
#define SCTP_INP_INFO_WLOCK()
#define SCTP_INP_INFO_WUNLOCK()
#define SCTP_INP_INFO_LOCK_DESTROY()
#define SCTP_IPI_COUNT_INIT()
#define SCTP_IPI_COUNT_DESTROY()
#endif

#define SCTP_TCB_SEND_LOCK_INIT(_tcb)
#define SCTP_TCB_SEND_LOCK_DESTROY(_tcb)
#define SCTP_TCB_SEND_LOCK(_tcb)
#define SCTP_TCB_SEND_UNLOCK(_tcb)

/* Lock for INP */
#define SCTP_INP_LOCK_INIT(_inp)
#define SCTP_INP_LOCK_DESTROY(_inp)

#define SCTP_INP_RLOCK(_inp)
#define SCTP_INP_RUNLOCK(_inp)
#define SCTP_INP_WLOCK(_inp)
#define SCTP_INP_WUNLOCK(_inep)
#define SCTP_INP_INCR_REF(_inp)
#define SCTP_INP_DECR_REF(_inp)

#define SCTP_ASOC_CREATE_LOCK_INIT(_inp)
#define SCTP_ASOC_CREATE_LOCK_DESTROY(_inp)
#define SCTP_ASOC_CREATE_LOCK(_inp)
#define SCTP_ASOC_CREATE_UNLOCK(_inp)

#define SCTP_INP_READ_INIT(_inp)
#define SCTP_INP_READ_DESTROY(_inp)
#define SCTP_INP_READ_LOCK(_inp)
#define SCTP_INP_READ_UNLOCK(_inp)

/* Lock for TCB */
#define SCTP_TCB_LOCK_INIT(_tcb)
#define SCTP_TCB_LOCK_DESTROY(_tcb)
#define SCTP_TCB_LOCK(_tcb)
#define SCTP_TCB_TRYLOCK(_tcb) 1
#define SCTP_TCB_UNLOCK(_tcb)
#define SCTP_TCB_UNLOCK_IFOWNED(_tcb)
#define SCTP_TCB_LOCK_ASSERT(_tcb)

#else
/*
 * per tcb level locking
 */
#define SCTP_IPI_COUNT_INIT()

#if defined(__Userspace_os_Windows)
#define SCTP_WQ_ADDR_INIT() \
        InitializeCriticalSection(&SCTP_BASE_INFO(wq_addr_mtx))
#define SCTP_WQ_ADDR_DESTROY() \
    DeleteCriticalSection(&SCTP_BASE_INFO(wq_addr_mtx))
#define SCTP_WQ_ADDR_LOCK() \
        EnterCriticalSection(&SCTP_BASE_INFO(wq_addr_mtx))
#define SCTP_WQ_ADDR_UNLOCK() \
        LeaveCriticalSection(&SCTP_BASE_INFO(wq_addr_mtx))


#define SCTP_INP_INFO_LOCK_INIT() \
    InitializeCriticalSection(&SCTP_BASE_INFO(ipi_ep_mtx))
#define SCTP_INP_INFO_LOCK_DESTROY() \
    DeleteCriticalSection(&SCTP_BASE_INFO(ipi_ep_mtx))
#define SCTP_INP_INFO_RLOCK() \
    EnterCriticalSection(&SCTP_BASE_INFO(ipi_ep_mtx))
#define SCTP_INP_INFO_TRYLOCK() \
        TryEnterCriticalSection(&SCTP_BASE_INFO(ipi_ep_mtx))
#define SCTP_INP_INFO_WLOCK() \
    EnterCriticalSection(&SCTP_BASE_INFO(ipi_ep_mtx))
#define SCTP_INP_INFO_RUNLOCK() \
    LeaveCriticalSection(&SCTP_BASE_INFO(ipi_ep_mtx))
#define SCTP_INP_INFO_WUNLOCK() \
    LeaveCriticalSection(&SCTP_BASE_INFO(ipi_ep_mtx))

#define SCTP_IP_PKTLOG_INIT() \
        InitializeCriticalSection(&SCTP_BASE_INFO(ipi_pktlog_mtx))
#define SCTP_IP_PKTLOG_DESTROY () \
    DeleteCriticalSection(&SCTP_BASE_INFO(ipi_pktlog_mtx))
#define SCTP_IP_PKTLOG_LOCK() \
        EnterCriticalSection(&SCTP_BASE_INFO(ipi_pktlog_mtx))
#define SCTP_IP_PKTLOG_UNLOCK() \
    LeaveCriticalSection(&SCTP_BASE_INFO(ipi_pktlog_mtx))

/*
 * The INP locks we will use for locking an SCTP endpoint, so for example if
 * we want to change something at the endpoint level for example random_store
 * or cookie secrets we lock the INP level.
 */
#define SCTP_INP_READ_INIT(_inp) \
    InitializeCriticalSection(&(_inp)->inp_rdata_mtx)
#define SCTP_INP_READ_DESTROY(_inp) \
    DeleteCriticalSection(&(_inp)->inp_rdata_mtx)
#define SCTP_INP_READ_LOCK(_inp) \
    EnterCriticalSection(&(_inp)->inp_rdata_mtx)
#define SCTP_INP_READ_UNLOCK(_inp) \
    LeaveCriticalSection(&(_inp)->inp_rdata_mtx)

#define SCTP_INP_LOCK_INIT(_inp) \
    InitializeCriticalSection(&(_inp)->inp_mtx)

#define SCTP_ASOC_CREATE_LOCK_INIT(_inp) \
    InitializeCriticalSection(&(_inp)->inp_create_mtx)

#define SCTP_INP_LOCK_DESTROY(_inp) \
    DeleteCriticalSection(&(_inp)->inp_mtx)

#define SCTP_ASOC_CREATE_LOCK_DESTROY(_inp) \
    DeleteCriticalSection(&(_inp)->inp_create_mtx)

#ifdef SCTP_LOCK_LOGGING
#define SCTP_INP_RLOCK(_inp)    do {                    \
    if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) sctp_log_lock(_inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_INP);\
    EnterCriticalSection(&(_inp)->inp_mtx);         \
} while (0)

#define SCTP_INP_WLOCK(_inp)    do {                    \
    sctp_log_lock(_inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_INP);\
    EnterCriticalSection(&(_inp)->inp_mtx);         \
} while (0)
#else

#define SCTP_INP_RLOCK(_inp)    do {                    \
    EnterCriticalSection(&(_inp)->inp_mtx);         \
} while (0)

#define SCTP_INP_WLOCK(_inp)    do {                    \
    EnterCriticalSection(&(_inp)->inp_mtx);         \
} while (0)
#endif


#define SCTP_TCB_SEND_LOCK_INIT(_tcb) \
    InitializeCriticalSection(&(_tcb)->tcb_send_mtx)

#define SCTP_TCB_SEND_LOCK_DESTROY(_tcb) \
    DeleteCriticalSection(&(_tcb)->tcb_send_mtx)

#define SCTP_TCB_SEND_LOCK(_tcb) do { \
    EnterCriticalSection(&(_tcb)->tcb_send_mtx); \
} while (0)

#define SCTP_TCB_SEND_UNLOCK(_tcb) \
    LeaveCriticalSection(&(_tcb)->tcb_send_mtx)

#define SCTP_INP_INCR_REF(_inp) atomic_add_int(&((_inp)->refcount), 1)
#define SCTP_INP_DECR_REF(_inp) atomic_add_int(&((_inp)->refcount), -1)

#ifdef SCTP_LOCK_LOGGING
#define SCTP_ASOC_CREATE_LOCK(_inp) do {                \
    if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) sctp_log_lock(_inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_CREATE); \
    EnterCriticalSection(&(_inp)->inp_create_mtx);      \
} while (0)
#else
#define SCTP_ASOC_CREATE_LOCK(_inp) do {                \
    EnterCriticalSection(&(_inp)->inp_create_mtx);      \
} while (0)
#endif

#define SCTP_INP_RUNLOCK(_inp) \
    LeaveCriticalSection(&(_inp)->inp_mtx)
#define SCTP_INP_WUNLOCK(_inp) \
    LeaveCriticalSection(&(_inp)->inp_mtx)
#define SCTP_ASOC_CREATE_UNLOCK(_inp) \
    LeaveCriticalSection(&(_inp)->inp_create_mtx)

/*
 * For the majority of things (once we have found the association) we will
 * lock the actual association mutex. This will protect all the assoiciation
 * level queues and streams and such. We will need to lock the socket layer
 * when we stuff data up into the receiving sb_mb. I.e. we will need to do an
 * extra SOCKBUF_LOCK(&so->so_rcv) even though the association is locked.
 */

#define SCTP_TCB_LOCK_INIT(_tcb) \
    InitializeCriticalSection(&(_tcb)->tcb_mtx)

#define SCTP_TCB_LOCK_DESTROY(_tcb) \
    DeleteCriticalSection(&(_tcb)->tcb_mtx)

#ifdef SCTP_LOCK_LOGGING
#define SCTP_TCB_LOCK(_tcb)  do {                   \
    if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) sctp_log_lock(_tcb->sctp_ep, _tcb, SCTP_LOG_LOCK_TCB);      \
    EnterCriticalSection(&(_tcb)->tcb_mtx);         \
} while (0)

#else
#define SCTP_TCB_LOCK(_tcb)  do {                   \
    EnterCriticalSection(&(_tcb)->tcb_mtx);         \
} while (0)
#endif

#define SCTP_TCB_TRYLOCK(_tcb)  ((TryEnterCriticalSection(&(_tcb)->tcb_mtx)))

#define SCTP_TCB_UNLOCK(_tcb)   do {  \
    LeaveCriticalSection(&(_tcb)->tcb_mtx);  \
} while (0)

#define SCTP_TCB_LOCK_ASSERT(_tcb)

#else /* all Userspaces except Windows */
#define SCTP_WQ_ADDR_INIT() \
        (void)pthread_mutex_init(&SCTP_BASE_INFO(wq_addr_mtx), NULL)
#define SCTP_WQ_ADDR_DESTROY() \
    (void)pthread_mutex_destroy(&SCTP_BASE_INFO(wq_addr_mtx))
#define SCTP_WQ_ADDR_LOCK() \
        (void)pthread_mutex_lock(&SCTP_BASE_INFO(wq_addr_mtx))
#define SCTP_WQ_ADDR_UNLOCK() \
        (void)pthread_mutex_unlock(&SCTP_BASE_INFO(wq_addr_mtx))


#define SCTP_INP_INFO_LOCK_INIT() \
    (void)pthread_mutex_init(&SCTP_BASE_INFO(ipi_ep_mtx), NULL)
#define SCTP_INP_INFO_LOCK_DESTROY() \
    (void)pthread_mutex_destroy(&SCTP_BASE_INFO(ipi_ep_mtx))
#define SCTP_INP_INFO_RLOCK() \
    (void)pthread_mutex_lock(&SCTP_BASE_INFO(ipi_ep_mtx))
#define SCTP_INP_INFO_TRYLOCK() \
        (!(pthread_mutex_trylock(&SCTP_BASE_INFO(ipi_ep_mtx))))
#define SCTP_INP_INFO_WLOCK() \
    (void)pthread_mutex_lock(&SCTP_BASE_INFO(ipi_ep_mtx))
#define SCTP_INP_INFO_RUNLOCK() \
    (void)pthread_mutex_unlock(&SCTP_BASE_INFO(ipi_ep_mtx))
#define SCTP_INP_INFO_WUNLOCK() \
    (void)pthread_mutex_unlock(&SCTP_BASE_INFO(ipi_ep_mtx))

#define SCTP_IP_PKTLOG_INIT() \
        (void)pthread_mutex_init(&SCTP_BASE_INFO(ipi_pktlog_mtx), NULL)
#define SCTP_IP_PKTLOG_DESTROY() \
    (void)pthread_mutex_destroy(&SCTP_BASE_INFO(ipi_pktlog_mtx))
#define SCTP_IP_PKTLOG_LOCK() \
        (void)pthread_mutex_lock(&SCTP_BASE_INFO(ipi_pktlog_mtx))
#define SCTP_IP_PKTLOG_UNLOCK() \
        (void)pthread_mutex_unlock(&SCTP_BASE_INFO(ipi_pktlog_mtx))



/*
 * The INP locks we will use for locking an SCTP endpoint, so for example if
 * we want to change something at the endpoint level for example random_store
 * or cookie secrets we lock the INP level.
 */
#define SCTP_INP_READ_INIT(_inp) \
    (void)pthread_mutex_init(&(_inp)->inp_rdata_mtx, NULL)

#define SCTP_INP_READ_DESTROY(_inp) \
    (void)pthread_mutex_destroy(&(_inp)->inp_rdata_mtx)

#define SCTP_INP_READ_LOCK(_inp)    do { \
    (void)pthread_mutex_lock(&(_inp)->inp_rdata_mtx);    \
} while (0)


#define SCTP_INP_READ_UNLOCK(_inp) \
    (void)pthread_mutex_unlock(&(_inp)->inp_rdata_mtx)

#define SCTP_INP_LOCK_INIT(_inp) \
    (void)pthread_mutex_init(&(_inp)->inp_mtx, NULL)

#define SCTP_ASOC_CREATE_LOCK_INIT(_inp) \
    (void)pthread_mutex_init(&(_inp)->inp_create_mtx, NULL)

#define SCTP_INP_LOCK_DESTROY(_inp) \
    (void)pthread_mutex_destroy(&(_inp)->inp_mtx)

#define SCTP_ASOC_CREATE_LOCK_DESTROY(_inp) \
    (void)pthread_mutex_destroy(&(_inp)->inp_create_mtx)

#ifdef SCTP_LOCK_LOGGING
#define SCTP_INP_RLOCK(_inp)    do {                    \
    if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) sctp_log_lock(_inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_INP);\
    (void)pthread_mutex_lock(&(_inp)->inp_mtx);         \
} while (0)

#define SCTP_INP_WLOCK(_inp)    do {                    \
    sctp_log_lock(_inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_INP);\
    (void)pthread_mutex_lock(&(_inp)->inp_mtx);         \
} while (0)

#else

#define SCTP_INP_RLOCK(_inp)    do {                    \
    (void)pthread_mutex_lock(&(_inp)->inp_mtx);         \
} while (0)

#define SCTP_INP_WLOCK(_inp)    do {                    \
    (void)pthread_mutex_lock(&(_inp)->inp_mtx);         \
} while (0)
#endif


#define SCTP_TCB_SEND_LOCK_INIT(_tcb) \
    (void)pthread_mutex_init(&(_tcb)->tcb_send_mtx, NULL)

#define SCTP_TCB_SEND_LOCK_DESTROY(_tcb) \
    (void)pthread_mutex_destroy(&(_tcb)->tcb_send_mtx)

#define SCTP_TCB_SEND_LOCK(_tcb) do { \
    (void)pthread_mutex_lock(&(_tcb)->tcb_send_mtx); \
} while (0)

#define SCTP_TCB_SEND_UNLOCK(_tcb) \
    (void)pthread_mutex_unlock(&(_tcb)->tcb_send_mtx)

#define SCTP_INP_INCR_REF(_inp) atomic_add_int(&((_inp)->refcount), 1)
#define SCTP_INP_DECR_REF(_inp) atomic_add_int(&((_inp)->refcount), -1)

#ifdef SCTP_LOCK_LOGGING
#define SCTP_ASOC_CREATE_LOCK(_inp) do {                \
    if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) sctp_log_lock(_inp, (struct sctp_tcb *)NULL, SCTP_LOG_LOCK_CREATE); \
    (void)pthread_mutex_lock(&(_inp)->inp_create_mtx);      \
} while (0)
#else
#define SCTP_ASOC_CREATE_LOCK(_inp) do {                \
    (void)pthread_mutex_lock(&(_inp)->inp_create_mtx);      \
} while (0)
#endif

#define SCTP_INP_RUNLOCK(_inp) \
    (void)pthread_mutex_unlock(&(_inp)->inp_mtx)
#define SCTP_INP_WUNLOCK(_inp) \
    (void)pthread_mutex_unlock(&(_inp)->inp_mtx)
#define SCTP_ASOC_CREATE_UNLOCK(_inp) \
    (void)pthread_mutex_unlock(&(_inp)->inp_create_mtx)

/*
 * For the majority of things (once we have found the association) we will
 * lock the actual association mutex. This will protect all the assoiciation
 * level queues and streams and such. We will need to lock the socket layer
 * when we stuff data up into the receiving sb_mb. I.e. we will need to do an
 * extra SOCKBUF_LOCK(&so->so_rcv) even though the association is locked.
 */

#define SCTP_TCB_LOCK_INIT(_tcb) \
    (void)pthread_mutex_init(&(_tcb)->tcb_mtx, NULL)

#define SCTP_TCB_LOCK_DESTROY(_tcb) \
    (void)pthread_mutex_destroy(&(_tcb)->tcb_mtx)

#ifdef SCTP_LOCK_LOGGING
#define SCTP_TCB_LOCK(_tcb)  do {                   \
    if(SCTP_BASE_SYSCTL(sctp_logging_level) & SCTP_LOCK_LOGGING_ENABLE) sctp_log_lock(_tcb->sctp_ep, _tcb, SCTP_LOG_LOCK_TCB);      \
    (void)pthread_mutex_lock(&(_tcb)->tcb_mtx);         \
} while (0)

#else
#define SCTP_TCB_LOCK(_tcb)  do {                   \
    (void)pthread_mutex_lock(&(_tcb)->tcb_mtx);         \
} while (0)
#endif

#define SCTP_TCB_TRYLOCK(_tcb)  (!(pthread_mutex_trylock(&(_tcb)->tcb_mtx)))

#define SCTP_TCB_UNLOCK(_tcb)   (void)pthread_mutex_unlock(&(_tcb)->tcb_mtx)

#define SCTP_TCB_LOCK_ASSERT(_tcb)
#endif

#endif /* SCTP_PER_SOCKET_LOCKING */


/*
 * common locks
 */

/* copied over to compile */
#define SCTP_INP_LOCK_CONTENDED(_inp) (0) /* Don't know if this is possible */
#define SCTP_INP_READ_CONTENDED(_inp) (0) /* Don't know if this is possible */
#define SCTP_ASOC_CREATE_LOCK_CONTENDED(_inp) (0) /* Don't know if this is possible */


/* socket locks */

#if defined(__Userspace__)
#if defined(__Userspace_os_Windows)
#define SOCKBUF_LOCK_ASSERT(_so_buf)
#define SOCKBUF_LOCK(_so_buf) EnterCriticalSection(&(_so_buf)->sb_mtx)
#define SOCKBUF_UNLOCK(_so_buf) LeaveCriticalSection(&(_so_buf)->sb_mtx)
#define SOCK_LOCK(_so)  SOCKBUF_LOCK(&(_so)->so_rcv)
#define SOCK_UNLOCK(_so)  SOCKBUF_UNLOCK(&(_so)->so_rcv)
#else
#define SOCKBUF_LOCK_ASSERT(_so_buf) KASSERT(pthread_mutex_trylock(SOCKBUF_MTX(_so_buf)) == EBUSY, ("%s: socket buffer not locked", __func__))
#define SOCKBUF_LOCK(_so_buf)   pthread_mutex_lock(SOCKBUF_MTX(_so_buf))
#define SOCKBUF_UNLOCK(_so_buf) pthread_mutex_unlock(SOCKBUF_MTX(_so_buf))
#define SOCK_LOCK(_so)      SOCKBUF_LOCK(&(_so)->so_rcv)
#define SOCK_UNLOCK(_so)    SOCKBUF_UNLOCK(&(_so)->so_rcv)
#endif
#else
#define SOCK_LOCK(_so)
#define SOCK_UNLOCK(_so)
#define SOCKBUF_LOCK(_so_buf)
#define SOCKBUF_UNLOCK(_so_buf)
#define SOCKBUF_LOCK_ASSERT(_so_buf)
#endif

#define SCTP_STATLOG_INIT_LOCK()
#define SCTP_STATLOG_LOCK()
#define SCTP_STATLOG_UNLOCK()
#define SCTP_STATLOG_DESTROY()

#if defined(__Userspace_os_Windows)
/* address list locks */
#define SCTP_IPI_ADDR_INIT() \
    InitializeCriticalSection(&SCTP_BASE_INFO(ipi_addr_mtx))
#define SCTP_IPI_ADDR_DESTROY() \
    DeleteCriticalSection(&SCTP_BASE_INFO(ipi_addr_mtx))

#define SCTP_IPI_ADDR_RLOCK()                       \
    do {                                \
        EnterCriticalSection(&SCTP_BASE_INFO(ipi_addr_mtx));    \
    } while (0)
#define SCTP_IPI_ADDR_RUNLOCK() \
    LeaveCriticalSection(&SCTP_BASE_INFO(ipi_addr_mtx))

#define SCTP_IPI_ADDR_WLOCK()                       \
    do {                                \
        EnterCriticalSection(&SCTP_BASE_INFO(ipi_addr_mtx));    \
    } while (0)
#define SCTP_IPI_ADDR_WUNLOCK() \
    LeaveCriticalSection(&SCTP_BASE_INFO(ipi_addr_mtx))


/* iterator locks */
#define SCTP_ITERATOR_LOCK_INIT() \
    InitializeCriticalSection(&sctp_it_ctl.it_mtx)

#define SCTP_ITERATOR_LOCK()                        \
    do {                                \
        EnterCriticalSection(&sctp_it_ctl.it_mtx);      \
    } while (0)

#define SCTP_ITERATOR_UNLOCK() \
    LeaveCriticalSection(&sctp_it_ctl.it_mtx)

#define SCTP_ITERATOR_LOCK_DESTROY() \
    DeleteCriticalSection(&sctp_it_ctl.it_mtx)


#define SCTP_IPI_ITERATOR_WQ_INIT() \
    InitializeCriticalSection(&sctp_it_ctl.ipi_iterator_wq_mtx)

#define SCTP_IPI_ITERATOR_WQ_DESTROY() \
    DeleteCriticalSection(&sctp_it_ctl.ipi_iterator_wq_mtx)

#define SCTP_IPI_ITERATOR_WQ_LOCK() \
    do { \
        EnterCriticalSection(&sctp_it_ctl.ipi_iterator_wq_mtx); \
    } while (0)

#define SCTP_IPI_ITERATOR_WQ_UNLOCK() \
    LeaveCriticalSection(&sctp_it_ctl.ipi_iterator_wq_mtx)

#else /* end of __Userspace_os_Windows */
/* address list locks */
#define SCTP_IPI_ADDR_INIT() \
    (void)pthread_mutex_init(&SCTP_BASE_INFO(ipi_addr_mtx), NULL)
#define SCTP_IPI_ADDR_DESTROY() \
    (void)pthread_mutex_destroy(&SCTP_BASE_INFO(ipi_addr_mtx))

#define SCTP_IPI_ADDR_RLOCK()                       \
    do {                                \
        (void)pthread_mutex_lock(&SCTP_BASE_INFO(ipi_addr_mtx));    \
    } while (0)
#define SCTP_IPI_ADDR_RUNLOCK() \
    (void)pthread_mutex_unlock(&SCTP_BASE_INFO(ipi_addr_mtx))

#define SCTP_IPI_ADDR_WLOCK()                       \
    do {                                \
        (void)pthread_mutex_lock(&SCTP_BASE_INFO(ipi_addr_mtx));    \
    } while (0)
#define SCTP_IPI_ADDR_WUNLOCK() \
    (void)pthread_mutex_unlock(&SCTP_BASE_INFO(ipi_addr_mtx))


/* iterator locks */
#define SCTP_ITERATOR_LOCK_INIT() \
    (void)pthread_mutex_init(&sctp_it_ctl.it_mtx, NULL)

#define SCTP_ITERATOR_LOCK()                        \
    do {                                \
        (void)pthread_mutex_lock(&sctp_it_ctl.it_mtx);      \
    } while (0)

#define SCTP_ITERATOR_UNLOCK() \
    (void)pthread_mutex_unlock(&sctp_it_ctl.it_mtx)

#define SCTP_ITERATOR_LOCK_DESTROY() \
    (void)pthread_mutex_destroy(&sctp_it_ctl.it_mtx)


#define SCTP_IPI_ITERATOR_WQ_INIT() \
    (void)pthread_mutex_init(&sctp_it_ctl.ipi_iterator_wq_mtx, NULL)

#define SCTP_IPI_ITERATOR_WQ_DESTROY() \
    (void)pthread_mutex_destroy(&sctp_it_ctl.ipi_iterator_wq_mtx)

#define SCTP_IPI_ITERATOR_WQ_LOCK() \
    do { \
        (void)pthread_mutex_lock(&sctp_it_ctl.ipi_iterator_wq_mtx); \
    } while (0)

#define SCTP_IPI_ITERATOR_WQ_UNLOCK() \
    (void)pthread_mutex_unlock(&sctp_it_ctl.ipi_iterator_wq_mtx)
#endif

#define SCTP_INCR_EP_COUNT() \
    do { \
        atomic_add_int(&SCTP_BASE_INFO(ipi_count_ep), 1); \
    } while (0)

#define SCTP_DECR_EP_COUNT() \
    do { \
           atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_ep), 1); \
    } while (0)

#define SCTP_INCR_ASOC_COUNT() \
    do { \
           atomic_add_int(&SCTP_BASE_INFO(ipi_count_asoc), 1); \
    } while (0)

#define SCTP_DECR_ASOC_COUNT() \
    do { \
           atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_asoc), 1); \
    } while (0)

#define SCTP_INCR_LADDR_COUNT() \
    do { \
           atomic_add_int(&SCTP_BASE_INFO(ipi_count_laddr), 1); \
    } while (0)

#define SCTP_DECR_LADDR_COUNT() \
    do { \
           atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_laddr), 1); \
    } while (0)

#define SCTP_INCR_RADDR_COUNT() \
    do { \
           atomic_add_int(&SCTP_BASE_INFO(ipi_count_raddr), 1); \
    } while (0)

#define SCTP_DECR_RADDR_COUNT() \
    do { \
           atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_raddr), 1); \
    } while (0)

#define SCTP_INCR_CHK_COUNT() \
    do { \
           atomic_add_int(&SCTP_BASE_INFO(ipi_count_chunk), 1); \
    } while (0)

#define SCTP_DECR_CHK_COUNT() \
    do { \
           atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_chunk), 1); \
    } while (0)

#define SCTP_INCR_READQ_COUNT() \
    do { \
           atomic_add_int(&SCTP_BASE_INFO(ipi_count_readq), 1); \
    } while (0)

#define SCTP_DECR_READQ_COUNT() \
    do { \
           atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_readq), 1); \
    } while (0)

#define SCTP_INCR_STRMOQ_COUNT() \
    do { \
           atomic_add_int(&SCTP_BASE_INFO(ipi_count_strmoq), 1); \
    } while (0)

#define SCTP_DECR_STRMOQ_COUNT() \
    do { \
           atomic_subtract_int(&SCTP_BASE_INFO(ipi_count_strmoq), 1); \
    } while (0)

#endif