/* BEGIN_ICS_COPYRIGHT3 ****************************************

Copyright (c) 2015, Intel Corporation

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      this list of conditions and the following disclaimer.

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** END_ICS_COPYRIGHT3   ****************************************/

/* [ICS VERSION STRING: unknown] */

#ifndef _IBA_PUBLIC_ISEMAPHORE_OSD_H_

#define _IBA_PUBLIC_ISEMAPHORE_OSD_H_

#include "iba/public/datatypes.h"

#include <semaphore.h>

#ifdef __cplusplus

extern "C" {

#endif

typedef sem_t SEMAPHORE;

/****************************************************************************

 * SemaInitState

 * 

 * Description:

 *	Initializes the state of a semaphore.

 * 

 * Inputs:

 *	pSema - Pointer to a semaphore object.

 * 

 * Outputs:

 *	None

 * 

 * Returns:

 *	None

 * 

 ****************************************************************************/

static __inline void

SemaInitState( 

	IN SEMAPHORE* const pSema )

{

	/* No-op. */

}

/****************************************************************************

 * SemaInit

 * 

 * Description:

 *	Initializes the semaphore.  This function performs all initialization.

 * 

 * Inputs:

 *	pSema		- Pointer to a semaphore object

 *	MaxCount	- Maximum number of wait operations that the semaphore can 

 *				satisfy before blocking callers.

 * 

 * Outputs:

 *	None

 * 

 * Returns:

 *	FSUCCESS

 *	FERROR		- Initialization failed.

 * 

 ****************************************************************************/

static __inline FSTATUS

SemaInit( 

	IN SEMAPHORE* const	pSema,

	IN const int32		MaxCount )

{

	ASSERT( pSema );

	ASSERT( MaxCount );

	if (-1 == sem_init( pSema, 0, MaxCount ))

		return FERROR;

	else

		return FSUCCESS;

}

/****************************************************************************

 * SemaDestroy

 * 

 * Description:

 *	Destroys the semaphore.

 * 

 * Inputs:

 *	pSema	- Pointer to a semaphore object

 * 

 * Outputs:

 *	None

 * 

 * Returns:

 *	None

 * 

 ****************************************************************************/

static __inline void

SemaDestroy(

	IN SEMAPHORE* const pSema )

{

	ASSERT( pSema );

	sem_destroy(pSema);

}

/****************************************************************************

 * SemaAcquire

 * 

 * Description:

 *	Acquires a semaphore.  This call blocks for the specified interval if the

 *	semaphore cannot be acquired immediately.  A wait of SEMA_NO_TIMEOUT

 *	will never timeout.

 * 

 * Inputs:

 *	pSema	- Pointer to a semaphore object

 *	wait_us	- Time, in microseconds, to wait for the semaphore.

 * 

 * Outputs:

 *	None

 * 

 * Returns:

 *	FSUCCESS	- The samphore was successfully acquired.

 *	FTIMEOUT	- The operation timed out.

 * 

 ****************************************************************************/

FSTATUS

SemaAcquire( 

	IN SEMAPHORE* const	pSema, 

	IN const int32		wait_us );

/****************************************************************************

 * SemaRelease

 * 

 * Description:

 *	Releases a semaphore. This will free one blocking waiter, if any.

 * 

 * Inputs:

 *	pSema	- Pointer to a semaphore object

 * 

 * Outputs:

 *	None

 * 

 * Returns:

 *	None

 * 

 ****************************************************************************/

static __inline void

SemaRelease(

	IN SEMAPHORE* const pSema )

{

	sem_post(pSema);

}

#ifdef __cplusplus

}	/* extern "C" */

#endif

#endif /* _IBA_PUBLIC_ISEMAPHORE_OSD_H_ */