339 lines
7.4 KiB
C
339 lines
7.4 KiB
C
/*
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******************************************************************************
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* HEADER FILE
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*
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* Document no: @(#) $Name: VXWORKS_ITER40_2019102207 $ $RCSfile: ipcom_atomic.h,v $ $Revision: 1.4.10.2 $
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* $Source: /home/interpeak/CVSRoot/ipcom/include/ipcom_atomic.h,v $
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* $Author: hchu0 $ $Date: 2013-07-05 01:34:52 $
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* $State: Exp $ $Locker: $
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*
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* INTERPEAK_COPYRIGHT_STRING
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* Design and implementation by Kenneth Jonsson <kenneth.jonsson@windriver.com>
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******************************************************************************
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*/
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#ifndef IPCOM_ATOMIC_H
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#define IPCOM_ATOMIC_H
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/*
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****************************************************************************
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* 1 DESCRIPTION
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****************************************************************************
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*/
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/*
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DESCRIPTION
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API for IPCOM atomic types
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*/
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/*
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****************************************************************************
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* 2 CONFIGURATION
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****************************************************************************
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*/
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#include "ipcom_config.h"
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/*
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****************************************************************************
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* 3 INCLUDE FILES
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****************************************************************************
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*/
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#include "ipcom_os.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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****************************************************************************
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* 4 DEFINES
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****************************************************************************
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*/
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/*
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* The size of type is very dependent on the architecture
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*/
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typedef struct { int val; } Ipcom_atomic_t;
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#if !defined(IPCOM_USE_ATOMIC_MACROS) && defined(__GNUC__)
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#define IPCOM_USE_ATOMIC_MACROS
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#endif
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#if defined(__GNUC__) && defined(IPARCH_arm)
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#define IPCOM_USE_ATOMIC_GENERIC_CODE
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#undef IPCOM_USE_ATOMIC_MACROS
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#endif
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#ifdef IPCOM_USE_ATOMIC_MACROS
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/*
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* These macros works fine with the generic IPCOM implementation
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* <IPCOM>/port/src/ipcom_atomic.c
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*/
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# define ipcom_atomic_inc(v) ipcom_atomic_add(v, 1)
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# define ipcom_atomic_dec(v) ipcom_atomic_add(v, -1)
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# define ipcom_atomic_sub(v, i) ipcom_atomic_add(v, -(i))
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# define ipcom_atomic_sub_and_return(v, i) ipcom_atomic_add_and_return(v, -(i))
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#endif /* IPCOM_USE_ATOMIC_MACROS */
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/*
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****************************************************************************
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* 6 PUBLIC FUNCTIONS
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****************************************************************************
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*/
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/*******************************************************************************
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*
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* ipcom_atomic_get - get a value
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*
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* This routine get a value from a atomic variable.
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*
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* Parameters:
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* \is
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* \i <v>
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* Pointer to an atmomic variable
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* \ie
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*
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* RETURNS: The value of the atomic type
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*
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* ERRNO: None.
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*/
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#if defined(__GNUC__) && !defined(IPCOM_USE_ATOMIC_GENERIC_CODE)
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#define ipcom_atomic_get(v) (v)->val
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#else
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IP_PUBLIC int ipcom_atomic_get
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(
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Ipcom_atomic_t *v
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);
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#endif
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/*******************************************************************************
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*
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* ipcom_atomic_set - set a value
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*
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* This routine set a value to a atomic variable.
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*
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* Parameters:
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* \is
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* \i <v>
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* Pointer to an atmomic variable
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* \i <i>
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* Value to set
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* \ie
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*
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* RETURNS: \&N/A.
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*
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* ERRNO: None.
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*/
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#if defined(__GNUC__) && !defined(IPCOM_USE_ATOMIC_GENERIC_CODE)
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#define ipcom_atomic_set(v, i) (v)->val = i
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#else
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IP_PUBLIC void ipcom_atomic_set
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(
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Ipcom_atomic_t *v,
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int i
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);
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#endif
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/*******************************************************************************
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*
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* ipcom_atomic_ptr_cas - replace one pointer with another
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*
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* This routine compares the value pointed to by the first argument
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* with the second argument and replaces the value pointed to by the
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* first argument with the third argument if the comparison matches.
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*
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* Parameters:
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* \is
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* \i <v>
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* Pointer to a memory area large enough to hold a pointer
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* \i <old_v>
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* Expected value pointed to by the first argument.
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* \i <new_v>
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* New value if the swap is successful.
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* \ie
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*
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* RETURNS: IP_TRUE if the swap took place, IP_FALSE otherwise.
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*
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* ERRNO: None.
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*/
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#if defined(__GNUC__) && !defined(IPCOM_USE_ATOMIC_GENERIC_CODE)
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#define ipcom_atomic_ptr_cas __sync_bool_compare_and_swap
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#else
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IP_PUBLIC Ip_bool ipcom_atomic_ptr_cas
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(
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Ip_ptrdiff_t *v,
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Ip_ptrdiff_t old_v,
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Ip_ptrdiff_t new_v
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);
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#endif
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/*******************************************************************************
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*
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* ipcom_atomic_add - add an integer
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*
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* This routine add an integer to an atomic type
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*
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* Parameters:
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* \is
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* \i <v>
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* Pointer to an atomic variable
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* \i <i>
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* Value to add
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* \ie
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*
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* RETURNS: \&N/A.
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*
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* ERRNO: None.
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*/
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#if defined(__GNUC__) && !defined(IPCOM_USE_ATOMIC_GENERIC_CODE)
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#define ipcom_atomic_add(v,i) (void)__sync_add_and_fetch(&(v)->val, i)
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#else
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IP_PUBLIC void ipcom_atomic_add
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(
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Ipcom_atomic_t *v,
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int i
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);
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#endif
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/*******************************************************************************
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*
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* ipcom_atomic_add_and_return - add an integer and returns the result
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*
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* This routine add an integer to an atomic type and returns the result
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*
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* Parameters:
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* \is
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* \i <v>
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* Pointer to an atomic variable
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* \i <i>
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* Value to add
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* \ie
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*
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* RETURNS: The result
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*
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* ERRNO: None.
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*/
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#if defined(__GNUC__) && !defined(IPCOM_USE_ATOMIC_GENERIC_CODE)
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#define ipcom_atomic_add_and_return(v,i) __sync_add_and_fetch(&(v)->val, i)
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#else
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IP_PUBLIC int ipcom_atomic_add_and_return
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(
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Ipcom_atomic_t *v,
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int i
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);
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#endif
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#ifndef IPCOM_USE_ATOMIC_MACROS
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/*******************************************************************************
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*
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* ipcom_atomic_inc - add one
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*
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* This routine add one to an atomic type
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*
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* Parameters:
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* \is
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* \i <v>
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* Pointer to an atomic variable
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* \ie
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*
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* RETURNS: \&N/A.
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*
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* ERRNO: None.
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*/
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IP_PUBLIC void ipcom_atomic_inc
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(
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Ipcom_atomic_t *v
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);
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/*******************************************************************************
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*
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* ipcom_atomic_dec - subtract one
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*
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* This routine subtract one from an atomic type
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*
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* Parameters:
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* \is
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* \i <v>
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* Pointer to an atomic variable
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* \ie
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*
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* RETURNS: \&N/A.
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*
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* ERRNO: None.
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*/
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IP_PUBLIC void ipcom_atomic_dec
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(
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Ipcom_atomic_t *v
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);
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/*******************************************************************************
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*
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* ipcom_atomic_sub - subtract an integer
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*
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* This routine subtract an integer from an atomic type
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*
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* Parameters:
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* \is
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* \i <v>
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* Pointer to an atomic variable
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* \i <i>
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* Value to subtract
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* \ie
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*
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* RETURNS: \&N/A.
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*
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* ERRNO: None.
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*/
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IP_PUBLIC void ipcom_atomic_sub
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(
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Ipcom_atomic_t *v,
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int i
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);
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/*******************************************************************************
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*
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* ipcom_atomic_sub_and_return - subtracts an integer and returns the result
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*
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* This routine subtracts an integer from an atomic type and returns the result
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*
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* Parameters:
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* \is
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* \i <v>
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* Pointer to an atomic variable
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* \i <i>
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* Value to subtract
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* \ie
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*
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* RETURNS: The result
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*
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* ERRNO: None.
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*/
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IP_PUBLIC int ipcom_atomic_sub_and_return
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(
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Ipcom_atomic_t *v,
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int i
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);
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#endif /* !IPCOM_USE_ATOMIC_MACROS */
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#ifdef __cplusplus
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}
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#endif
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#endif /* IPCOM_ATOMIC_H */
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/*
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****************************************************************************
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* END OF FILE
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****************************************************************************
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*/
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