/**
* @file
*
* @brief Private Inlined Routines for POSIX Semaphores
*
* This include file contains the static inline implementation of the private
* inlined routines for POSIX Semaphores.
*/
/*
* COPYRIGHT (c) 1989-2013.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef _RTEMS_POSIX_SEMAPHOREIMPL_H
#define _RTEMS_POSIX_SEMAPHOREIMPL_H
#include <rtems/posix/semaphore.h>
#include <rtems/posix/posixapi.h>
#include <rtems/score/coresemimpl.h>
#include <errno.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* This defines the information control block used to manage
* this class of objects.
*/
POSIX_EXTERN Objects_Information _POSIX_Semaphore_Information;
/**
* This defines the mapping from Score status codes to POSIX return codes.
*/
extern const int
_POSIX_Semaphore_Return_codes[CORE_SEMAPHORE_STATUS_LAST + 1];
/**
* @brief POSIX Semaphore Manager Initialization
*
* This routine performs the initialization necessary for this manager.
*/
void _POSIX_Semaphore_Manager_initialization(void);
/**
* @brief POSIX Semaphore Allocate
*
* This function allocates a semaphore control block from
* the inactive chain of free semaphore control blocks.
*/
RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Allocate( void )
{
return (POSIX_Semaphore_Control *)
_Objects_Allocate( &_POSIX_Semaphore_Information );
}
/**
* @brief POSIX Semaphore Free
*
* This routine frees a semaphore control block to the
* inactive chain of free semaphore control blocks.
*/
RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Free (
POSIX_Semaphore_Control *the_semaphore
)
{
_Objects_Free( &_POSIX_Semaphore_Information, &the_semaphore->Object );
}
/**
* @brief POSIX Semaphore Get
*
* This function maps semaphore IDs to semaphore control blocks.
* If ID corresponds to a local semaphore, then it returns
* the_semaphore control pointer which maps to ID and location
* is set to OBJECTS_LOCAL. if the semaphore ID is global and
* resides on a remote node, then location is set to OBJECTS_REMOTE,
* and the_semaphore is undefined. Otherwise, location is set
* to OBJECTS_ERROR and the_semaphore is undefined.
*/
RTEMS_INLINE_ROUTINE POSIX_Semaphore_Control *_POSIX_Semaphore_Get (
sem_t *id,
Objects_Locations *location
)
{
return (POSIX_Semaphore_Control *)
_Objects_Get( &_POSIX_Semaphore_Information, (Objects_Id)*id, location );
}
/**
* @brief POSIX Semaphore Create Support
*
* This routine supports the sem_init and sem_open routines.
*/
int _POSIX_Semaphore_Create_support(
const char *name,
size_t name_len,
int pshared,
unsigned int value,
POSIX_Semaphore_Control **the_sem
);
/**
* @brief POSIX Semaphore Delete
*
* This routine supports the sem_close and sem_unlink routines.
*/
void _POSIX_Semaphore_Delete(
POSIX_Semaphore_Control *the_semaphore
);
/**
* @brief POSIX semaphore wait support.
*
* This routine supports the sem_wait, sem_trywait, and sem_timedwait
* services.
*/
int _POSIX_Semaphore_Wait_support(
sem_t *sem,
bool blocking,
Watchdog_Interval timeout
);
/**
* @brief POSIX Semaphore Translate Score to POSIX Return Codes
*
* A support routine which converts core semaphore status codes into the
* appropriate POSIX status values.
*/
RTEMS_INLINE_ROUTINE int
_POSIX_Semaphore_Translate_core_semaphore_return_code(
CORE_semaphore_Status the_semaphore_status
)
{
/*
* Internal consistency check for bad status from SuperCore
*/
#if defined(RTEMS_DEBUG)
if ( the_semaphore_status > CORE_SEMAPHORE_STATUS_LAST )
return EINVAL;
#endif
return _POSIX_Semaphore_Return_codes[the_semaphore_status];
}
/**
* @brief POSIX Semaphore Namespace Remove
*/
RTEMS_INLINE_ROUTINE void _POSIX_Semaphore_Namespace_remove (
POSIX_Semaphore_Control *the_semaphore
)
{
_Objects_Namespace_remove(
&_POSIX_Semaphore_Information, &the_semaphore->Object );
}
/**
* @see _POSIX_Name_to_id().
*/
RTEMS_INLINE_ROUTINE int _POSIX_Semaphore_Name_to_id(
const char *name,
Objects_Id *id,
size_t *len
)
{
return _POSIX_Name_to_id( &_POSIX_Semaphore_Information, name, id, len );
}
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
