source/include/exatomic.h

0001 /**
0002  * @brief Enduro/X Atomic API
0003  *
0004  * @file exatomic.h
0005  */
0006 /* -----------------------------------------------------------------------------
0007  * Enduro/X Middleware Platform for Distributed Transaction Processing
0008  * Copyright (C) 2009-2016, ATR Baltic, Ltd. All Rights Reserved.
0009  * Copyright (C) 2017-2023, Mavimax, Ltd. All Rights Reserved.
0010  * This software is released under one of the following licenses:
0011  * AGPL (with Java and Go exceptions) or Mavimax's license for commercial use.
0012  * See LICENSE file for full text.
0013  * -----------------------------------------------------------------------------
0014  * AGPL license:
0015  *
0016  * This program is free software; you can redistribute it and/or modify it under
0017  * the terms of the GNU Affero General Public License, version 3 as published
0018  * by the Free Software Foundation;
0019  *
0020  * This program is distributed in the hope that it will be useful, but WITHOUT ANY
0021  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
0022  * PARTICULAR PURPOSE. See the GNU Affero General Public License, version 3
0023  * for more details.
0024  *
0025  * You should have received a copy of the GNU Affero General Public License along
0026  * with this program; if not, write to the Free Software Foundation, Inc.,
0027  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
0028  *
0029  * -----------------------------------------------------------------------------
0030  * A commercial use license is available from Mavimax, Ltd
0031  * contact@mavimax.com
0032  * -----------------------------------------------------------------------------
0033  */
0034 #ifndef EXATOMIC_H_
0035 #define EXATOMIC_H_
0036
0037 #if defined(__cplusplus)
0038 extern "C" {
0039 #endif
0040
0041 /*---------------------------Includes-----------------------------------*/
0042 #include <ndrx_config.h>
0043
0044 #ifdef EX_HAVE_STDATOMIC
0045 #include <stdatomic.h>
0046 #endif
0047
0048 /*---------------------------Externs------------------------------------*/
0049 /*---------------------------Macros-------------------------------------*/
0050
0051 #ifdef EX_HAVE_STDATOMIC
0052 #define ndrx_atomic _Atomic volatile
0053 #else
0054 #define ndrx_atomic volatile
0055 #endif
0056 /**
0057  * Increment value atomically (where platform allows this)
0058  * @param OBJ value to increment (pointer to)
0059  * @param ARG increment by
0060  */
0061 #if defined(EX_HAVE_STDATOMIC)
0062
0063 #define NDRX_ATOMIC_STORE(OBJ, ARG)   atomic_store((OBJ), (ARG))
0064 #define NDRX_ATOMIC_ADD(OBJ, ARG)   atomic_fetch_add((OBJ), (ARG))
0065 #define NDRX_ATOMIC_LOAD(OBJ)   atomic_load((OBJ))
0066
0067 #elif defined(EX_HAVE_SYNCFETCHADD)
0068
0069 #define NDRX_ATOMIC_STORE(OBJ, ARG)   __sync_lock_test_and_set((OBJ), (ARG))
0070 #define NDRX_ATOMIC_ADD(OBJ, ARG)   __sync_fetch_and_add((OBJ), (ARG))
0071 #define NDRX_ATOMIC_LOAD(OBJ)   __sync_fetch_and_add((OBJ), 0)
0072
0073 #else
0074
0075 #define NDRX_ATOMIC_STORE(OBJ, ARG) *(OBJ) = (ARG)
0076 #define NDRX_ATOMIC_ADD(OBJ, ARG) *(OBJ) = *(OBJ) + (ARG)
0077 #define NDRX_ATOMIC_LOAD(OBJ)  *(OBJ)
0078
0079 #endif
0080
0081 /*---------------------------Enums--------------------------------------*/
0082 /*---------------------------Typedefs-----------------------------------*/
0083 /*---------------------------Globals------------------------------------*/
0084 /*---------------------------Statics------------------------------------*/
0085 /*---------------------------Prototypes---------------------------------*/
0086
0087 #if defined(__cplusplus)
0088 }
0089 #endif
0090
0091 #endif
0092 /* vim: set ts=4 sw=4 et smartindent: */