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/**
* @file IxOsalOsSemaphore.c (eCos)
*
* @brief Implementation for semaphore and mutex.
*
*
* @par
* IXP400 SW Release version 1.5
*
* -- Copyright Notice --
*
* @par
* Copyright 2001-2005, Intel Corporation.
* All rights reserved.
*
* @par
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. Neither the name of the Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* @par
* 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.
*
* @par
* -- End of Copyright Notice --
*/
#include "IxOsal.h"
#include "IxNpeMhReceive_p.h"
/* Define a large number */
#define IX_OSAL_MAX_LONG (0x7FFFFFFF)
/* Max timeout in MS, used to guard against possible overflow */
#define IX_OSAL_MAX_TIMEOUT_MS (IX_OSAL_MAX_LONG/HZ)
PUBLIC IX_STATUS
ixOsalSemaphoreInit (IxOsalSemaphore * sid, UINT32 start_value)
{
diag_printf("%s called\n", __FUNCTION__);
return IX_SUCCESS;
}
/**
* DESCRIPTION: If the semaphore is 'empty', the calling thread is blocked.
* If the semaphore is 'full', it is taken and control is returned
* to the caller. If the time indicated in 'timeout' is reached,
* the thread will unblock and return an error indication. If the
* timeout is set to 'IX_OSAL_WAIT_NONE', the thread will never block;
* if it is set to 'IX_OSAL_WAIT_FOREVER', the thread will block until
* the semaphore is available.
*
*
*/
PUBLIC IX_STATUS
ixOsalSemaphoreWait (IxOsalOsSemaphore * sid, INT32 timeout)
{
diag_printf("%s called\n", __FUNCTION__);
return IX_SUCCESS;
}
/*
* Attempt to get semaphore, return immediately,
* no error info because users expect some failures
* when using this API.
*/
PUBLIC IX_STATUS
ixOsalSemaphoreTryWait (IxOsalSemaphore * sid)
{
diag_printf("%s called\n", __FUNCTION__);
return IX_FAIL;
}
/**
*
* DESCRIPTION: This function causes the next available thread in the pend queue
* to be unblocked. If no thread is pending on this semaphore, the
* semaphore becomes 'full'.
*/
PUBLIC IX_STATUS
ixOsalSemaphorePost (IxOsalSemaphore * sid)
{
diag_printf("%s called\n", __FUNCTION__);
return IX_SUCCESS;
}
PUBLIC IX_STATUS
ixOsalSemaphoreGetValue (IxOsalSemaphore * sid, UINT32 * value)
{
diag_printf("%s called\n", __FUNCTION__);
return IX_FAIL;
}
PUBLIC IX_STATUS
ixOsalSemaphoreDestroy (IxOsalSemaphore * sid)
{
diag_printf("%s called\n", __FUNCTION__);
return IX_FAIL;
}
/****************************
* Mutex
****************************/
static void drv_mutex_init(IxOsalMutex *mutex)
{
*mutex = 0;
}
static void drv_mutex_destroy(IxOsalMutex *mutex)
{
*mutex = -1;
}
static int drv_mutex_trylock(IxOsalMutex *mutex)
{
int result = TRUE;
if (*mutex == 1)
result = FALSE;
return result;
}
static void drv_mutex_unlock(IxOsalMutex *mutex)
{
if (*mutex == 1)
printf("Trying to unlock unlocked mutex!");
*mutex = 0;
}
PUBLIC IX_STATUS
ixOsalMutexInit (IxOsalMutex * mutex)
{
drv_mutex_init(mutex);
return IX_SUCCESS;
}
PUBLIC IX_STATUS
ixOsalMutexLock (IxOsalMutex * mutex, INT32 timeout)
{
int tries;
if (timeout == IX_OSAL_WAIT_NONE) {
if (drv_mutex_trylock(mutex))
return IX_SUCCESS;
else
return IX_FAIL;
}
tries = (timeout * 1000) / 50;
while (1) {
if (drv_mutex_trylock(mutex))
return IX_SUCCESS;
if (timeout != IX_OSAL_WAIT_FOREVER && tries-- <= 0)
break;
udelay(50);
}
return IX_FAIL;
}
PUBLIC IX_STATUS
ixOsalMutexUnlock (IxOsalMutex * mutex)
{
drv_mutex_unlock(mutex);
return IX_SUCCESS;
}
/*
* Attempt to get mutex, return immediately,
* no error info because users expect some failures
* when using this API.
*/
PUBLIC IX_STATUS
ixOsalMutexTryLock (IxOsalMutex * mutex)
{
if (drv_mutex_trylock(mutex))
return IX_SUCCESS;
return IX_FAIL;
}
PUBLIC IX_STATUS
ixOsalMutexDestroy (IxOsalMutex * mutex)
{
drv_mutex_destroy(mutex);
return IX_SUCCESS;
}
PUBLIC IX_STATUS
ixOsalFastMutexInit (IxOsalFastMutex * mutex)
{
return ixOsalMutexInit(mutex);
}
PUBLIC IX_STATUS ixOsalFastMutexTryLock(IxOsalFastMutex *mutex)
{
return ixOsalMutexTryLock(mutex);
}
PUBLIC IX_STATUS
ixOsalFastMutexUnlock (IxOsalFastMutex * mutex)
{
return ixOsalMutexUnlock(mutex);
}
PUBLIC IX_STATUS
ixOsalFastMutexDestroy (IxOsalFastMutex * mutex)
{
return ixOsalMutexDestroy(mutex);
}
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