original files of m241

components/ip_net2-6.9/ipcom/include/ipcom_atomic.h

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