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281 lines
8.4 KiB
C
281 lines
8.4 KiB
C
/*-
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* Copyright (C) 2001-2003 by NBMK Encryption Technologies.
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* All rights reserved.
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*
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* NBMK Encryption Technologies provides no support of any kind for
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* this software. Questions or concerns about it may be addressed to
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* the members of the relevant open-source community at
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* <tech-crypto@netbsd.org>.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*****************************************************************************
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* @(#) n8_semaphore_bsd.c 1.2@(#)
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*****************************************************************************/
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/*****************************************************************************/
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/** @file n8_semaphore_bsd.c
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* @brief This file implements the n8 semaphore operations for BSD kernel
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* environment.
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*
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*****************************************************************************/
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/*****************************************************************************
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* Revision history:
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* 12/02/02 brr Added n8_delete_process_init_sem function.
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* 06/12/02 hml Implemented the processSem ops. They are all empty for BSD.
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* 03/18/02 brr Original version.
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****************************************************************************/
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/** @defgroup n8_semaphore NetOctave Semaphore Operations
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*/
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#include "helper.h"
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#include "n8_pub_errors.h"
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#include "n8_semaphore.h"
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static int initComplete = FALSE;
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static ATOMICLOCK_t initProcessMutex_g = SIMPLELOCK_INITIALIZER;
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/*****************************************************************************
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* n8_acquire_process_init_sem
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*****************************************************************************/
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/** @ingroup n8_semaphore
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* @brief Acquire the statically defined initilization semaphore.
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*
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* This function is the POSIX implementation of a function that grabs
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* the statically allocated initialization semaphore. It turns out this
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* is needed in order to prevent any race conditions on initialization.
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*
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* @par Externals:
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* initProcessMutex_g RW: The global process initialization mutex.
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*
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* @return
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* None.
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*
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* @par Errors:
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* None.
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*
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* @par Assumptions:
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*****************************************************************************/
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void
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n8_acquire_process_init_sem()
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{
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N8_AtomicLock(initProcessMutex_g);
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}
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/*****************************************************************************
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* n8_release_process_init_sem
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*****************************************************************************/
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/** @ingroup n8_semaphore
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* @brief Release the statically defined initilization semaphore.
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*
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* This function is the POSIX implementation of a function that releases
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* the statically allocated initialization semaphore. It turns out this
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* is needed in order to prevent any race conditions on initialization.
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*
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* @par Externals:
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* initProcessMutex_g RW: The global process initialization mutex.
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*
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* @return
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* None.
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*
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* @par Errors:
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* None.
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*
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* @par Assumptions:
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*****************************************************************************/
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void
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n8_release_process_init_sem()
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{
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N8_AtomicUnlock(initProcessMutex_g);
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}
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/*****************************************************************************
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* n8_create_process_init_sem
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*****************************************************************************/
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/** @ingroup n8_semaphore
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* @brief Creates the process initialization semaphore
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*
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* This function allocates a kernel semaphore,
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*
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* @return
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*
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* @par Errors:
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*
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* @par Locks:
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* None.
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* A text description of locks required by this routine and
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* locks aquired by this routine. Optional if there are no locks.
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*
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* @par Assumptions:
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* initVal is a sane number
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*****************************************************************************/
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void
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n8_create_process_init_sem(void)
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{
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if (initComplete == FALSE)
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{
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N8_AtomicLockInit(initProcessMutex_g);
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initComplete = TRUE;
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}
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}
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/*****************************************************************************
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* n8_delete_process_init_sem
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*****************************************************************************/
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/** @ingroup n8_semaphore
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* @brief Deletes the process initialization semaphore
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*
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* This function deletes a kernel semaphore,
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*
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* @return
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*
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* @par Errors:
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*
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* @par Locks:
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* None.
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* A text description of locks required by this routine and
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* locks aquired by this routine. Optional if there are no locks.
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*
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* @par Assumptions:
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* initVal is a sane number
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*****************************************************************************/
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void
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n8_delete_process_init_sem(void)
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{
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N8_AtomicLockDel(initProcessMutex_g);
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initComplete = FALSE;
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}
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/*****************************************************************************
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* N8_acquireProcessSem
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*****************************************************************************/
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/** @ingroup n8_semaphore
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* @brief Acquire a lock of type N8_Lock_t.
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*
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* This function is the kernel space implementation of a function that grabs
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* a lock of type N8_Lock_t. Does nothing in BSD.
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*
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*
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* @par Externals:
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* None.
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*
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* @return
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* None.
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*
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* @par Errors:
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* None.
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*
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* @par Assumptions:
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*****************************************************************************/
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void
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N8_acquireProcessSem(n8_Lock_t *lock_p)
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{
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}
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/*****************************************************************************
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* N8_releaseProcessSem
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*****************************************************************************/
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/** @ingroup n8_semaphore
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* @brief Release a lock of type N8_Lock_t.
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*
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* This function is the kernel space implementation of a function that releases
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* a lock of type N8_Lock_t. Does nothing in BSD.
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*
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*
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* @par Externals:
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* None.
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*
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* @return
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* None.
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*
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* @par Errors:
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* None.
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*
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* @par Assumptions:
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*****************************************************************************/
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void
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N8_releaseProcessSem(n8_Lock_t *lock_p)
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{
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}
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/*****************************************************************************
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* N8_initProcessSem
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*****************************************************************************/
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/** @ingroup n8_semaphore
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* @brief Initialize a lock of type N8_Lock_t.
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*
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* This function is the kernel space implementation of a function that
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* initializes a lock of type N8_Lock_t. Does nothing in BSD.
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*
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*
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* @par Externals:
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* None.
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*
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* @return
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* None.
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*
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* @par Errors:
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* None.
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*
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* @par Assumptions:
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*****************************************************************************/
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void
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N8_initProcessSem(n8_Lock_t *lock_p)
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{
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}
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/*****************************************************************************
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* N8_deleteProcessSem
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*****************************************************************************/
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/** @ingroup n8_semaphore
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* @brief Initialize a lock of type N8_Lock_t.
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*
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* This function is the kernel space implementation of a function that
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* deletes a lock of type N8_Lock_t. Does nothing in BSD.
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*
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*
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* @par Externals:
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* None.
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*
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* @return
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* None.
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*
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* @par Errors:
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* None.
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*
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* @par Assumptions:
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*****************************************************************************/
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void
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N8_deleteProcessSem(n8_Lock_t *lock_p)
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{
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}
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