....................................../////.===Shadow-Here===./////................................................ > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < ------------------------------------------------------------------------------------------------------------------- /////////////////////////////////////////////////////////////////////////////////////////////////////////////////// RIFF¤ WEBPVP8 ˜ ðÑ *ôô>‘HŸK¥¤"§£±¨àð enü¹%½_F‘åè¿2ºQú³íªú`N¿­3ÿƒügµJžaÿ¯ÿ°~¼ÎùnúîÞÖô•òíôÁÉß®Sm¥Ü/ ‡ó˜f£Ùà<˜„xëJ¢Ù€SO3x<ªÔ©4¿+ç¶A`q@Ì“Úñè™ÍÿJÌ´ª-˜ÆtÊÛL]Ïq*‘Ý”ì#ŸÌÏãY]@ê`¿ /ªfkØB4·®£ó z—Üw¥Pxù–ÞLШKÇN¾AkÙTf½è'‰g gÆv›Øuh~ a˜Z— ïj*á¥t d£“uÒ ¨`K˜¹ßþ]b>˜]_ÏÔ6W—è2r4x•íÖ…"ƒÖNîä!¦å Ú}ýxGøÌ —@ ;ÆÚŠ=ɾ1ý8lªË¥ô ^yf®Œ¢u&2©nÙÇ›ñÂñŒ³ aPo['½»øFùà­+4ê“$!lövlüÞ=;N®3ð‚õ›DÉKòÞ>ÄÍ ¥ˆuߤ#ˆ$6ù™¥îŠ‡y’ÍB¼ çxÛ;X"WL£R÷͝*ó-¶Zu}º.s¸sšXqù–DþÿvªhüïwyŸ ¯é³lÀ:KCûÄ£Ëá\…­ ~—ýóî ¼ûûÜTÓüÇy…ŽÆvc»¾×U ñ¸žþоP÷¦ó:Ò¨¨5;Ð#&#ÖúñläÿÁœ GxÉ­/ñ‡áQðìYÉtÒwŽ¼GÔ´zàÒò ð*ëzƒ•4~H]Ø‹f ñÓÈñ`NåWçs'ÆÏW^ø¹!XžµmQ5ÃËoLœÎ: ÞËÍ¥J ù…î èo£ßPÎñ¶ž8.Œ]ʵ~5›ÙË-ù*8ÙÖß±~ ©¹rÓê‚j¶d¸{^Q'˜±Crß ÚH—#¥¥QlÀ×ëã‡DÜ«èî þ&Çæžî;ŽÏºò6ÒLÃXy&ZŒ'j‚¢Ù€IßÚù+–MGi‰*jE€‘JcÜ ÓÌ EÏÚj]o˜ Þr <¾U ûŪæÍ/šÝH¥˜b”¼ ÁñßX GP›ï2›4WŠÏà×£…íÓk†¦H·ÅíMh–*nó÷à]ÁjCº€b7<ب‹¨5車bp2:Á[UªM„QŒçiNMa#<5›áËó¸HýÊ"…×Éw¹¦ì2º–x<›»a±¸3Weü®FÝ⑱ö–î–³|LPÈ~çð~Çå‡|º kD¢µÏàÆAI %1À% ¹Ò – ”ϝS¦‰4&¶£°à Öý”û_Ò Áw°A«Å€?mÇÛgHÉ/8)á¾ÛìáöŽP í¨PŸNÙµº¦‡§Ùš"ÿ«>+ªÕ`Ê÷‡‚ß Õû˜þãÇ-PÍ.¾XV‘€ dÜ"þ4¹ ±Oú‘©t¥¦FªÄÃÄ•b‚znýu½—#cDs˜ÃiÑOˆñ×QO=*IAÊ,¶ŽZƒ;‡wøXè%EÐk:F±Ú” .Ѽ+Áu&Ç`."pÈÉw o&¿dE6‘’EqTuK@Ì¥ã™À(Êk(h‰,H}RÀIXÛš3µ1©_OqÚÒJAñ$ÊÙÜ;D3çŒ[þùœh¬Ã³™ö6ç†NY".Ú‰ï[ªŸŒ '²Ð öø_¨ÂÉ9u鶳ÒŠõTàîMØ#û¯gN‡bÙ놚X„ö …ÉeüÌ^J ‹€.œ$Æ)βÄeæW#óüßĺŸ€ ÀzwV 9oä»f4V*uB «Ë†¹ì¯žR霓æHXa=&“I4K;¯ç‹h×·"UŠ~<•â•ªVêª&ÍSÃÆÅ?ÔqÎ*mTM ˜›µwêd#[C¡©§‘D<©àb†–ÁœøvH/,í:¯( ²£|4-„Æövv„Yͼ™^Á$ˆ„¢Û[6yB.åH*V¨æ?$=˜Ñ€•î¦ñ·­(VlŸ‘ nÀt8W÷´Bûba?q9ú¶Xƒl«ÿ\ù¶’þòUÐj/õ¢Ìµ³g$ƒÎR!¸»|Oߍë’BhîÚÑ¢ñåŒJ„®„£2Ð3•ô02Nt…!£Í]Ïc½Qÿ?ˆ<&ÃA¾Ú,JˆijÌ#5yz„‰Î|ÊŽ5QÏ:‹ÐaóVÔxW—CpeÏzÐïíçôÿÅ_[hãsÐ_/ŽTÝ?BîˆííV$<¿i>²F¬_Eß¿ †bÊŒº­ÿ®Z H“C}”¬,Mp ý/Bá£w>˜YV°aƒúh+cŠ- r/[%|üUMHäQ°X»|û/@|°¥Ð !BÔ Ç¢Ä©š+Õì D«7ìN¶ŽðÔ " ƶ’ÖçtA‰Û×}{tþz­¾GÍ›k¹OEJR$ Â׃ «ëÁ"oÉôž$oUK(Ä)Ãz³Ê-‹êN[Ò3Œñbï8P 4ƒ×q¢bo|?<ÛX¬òÄÍ°L–±›(™ûG?ýË©ÚÄ–ÂDØÐ_Ç¡ô ¾–ÄÏø ×e8Ë©$ÄF¹Å‹ì[©óìl:F¾f´‹‹Xì²ï®\¬ôùƒ ÿat¥óèÒùHß0äe‚;ü×h:ÆWðHž=Ã8骣"kœ'Y?³}Tûè€>?0l›e1Lòñ„aæKÆw…hÖŠùW…ÈÆÄ0ši·›[pcwËþñiêíY/~-Á5˜!¿†A›™Mÿþ(±“t@â“ö2­´TG5yé]çå僳 .·ÍïçÝ7UÚ±Ð/Nè»,_Ï ùdj7\ï Wì4›„»c¸àešg#ÒÊ⥭áØo5‘?ÌdÝô¯ ¹kzsƒ=´#ëÉK›Ø´±-¥eW?‡çßtòTã…$Ý+qÿ±ƒ÷_3Ô¥í÷:æ–ž<·Ö‡‰Å¢ š‡%Ô—utÌÈìðžgÖÀz²À—ï÷Óîäõ{K'´È÷³yaÏÁjƒô}ž§®æÊydÕÈë5¯èˆõvÕ©ã*çD„ “z„Ó‡^^xÂ3M§A´JG‚öï 3W'ˆ.OvXè¡ÊÕª?5º7†˜(˜Ç¶#çê’¶!ÌdZK§æ 0fãaN]òY³RV ™î$®K2R¨`W!1Ôó\;Ý ýB%qæK•&ÓÈe9È0êI±žeŸß -ú@žQr¦ ö4»M¼Áè¹µmw 9 EÆE_°2ó„ŸXKWÁ×Hóì^´²GѝF©óäR†¦‰ç"V»eØ<3ùd3ÿÚ¤Žú“Gi" —‘_ÙËÎ~Üö¯¥½Î»üŸEÚŽåmÞþí ;ÞólËΦMzA"Âf(´òá;Éï(/7½ûñÌ­cïÕçлþÝz¾-ÍvÑ“pH­–ðÓj$¸Äû¤‚‘ãUBË-n“2åPkS5&‹Â|+g^œ®Ì͆d!OïäîU«c;{Û!ÅŽ«ëZ9Ókóˆ]¯ƒ›né `ÇÒ+tÆš (ØKá¾—=3œ®•vuMñg²\ï Ec€ 05±d™‡×iÇ×›UúvÌ¢£Èþ¡ÕØô¶ßÎA"ß±#Ö²ˆÊŸ¦*Ä~ij|àø.-¼'»Ú¥£h ofº¦‡VsR=N½„Î v˜Z*SÌ{=jÑB‹tê…;’HžH¯8–îDù8ñ¢|Q•bÛçš–‹m³“ê¨ åÏ^m¬Žãþ©ïêO‡½6] µÆ„Ooòü ²x}N¦Ë3ïé¿»€›HA˜m%çÞ/¿í7Fø“‹léUk)É°Œµ8Q8›:ÀŠeT*šõ~ôڝG6 ¢}`ùH­–”¡k ‰P1>š†®9z11!X wKfmÁ¦xÑ,N1Q”–æB¶M…ÒÃv6SMˆhU¬ÊPŽï‘öj=·CŒ¯u¹ƒVIЃsx4’ömÛýc塶7ßŠß 57^\wÒÐÆ k§h,Œý î«q^R½3]J¸ÇðN ‚çU¬ôº^Áì} ³f©Õœ§ˆã:FÄÈ‚é(€™?àýÓüè1Gô£¼éj‚OÅñ  #>×—ßtà 0G¥Åa뀐kßhc™À_ÉñÞ#±)GD" YîäË-ÿÙ̪ ¹™a¯´¢E\ÝÒö‚;™„ë]_ p8‰o¡ñ+^÷ 3‘'dT4œŽ ðVë½° :¬víÑ«£tßÚS-3¶“þ2 †üüʨòrš¹M{É_¤`Û¨0ìjœøJ‡:÷ÃáZ˜†@GP&œÑDGÏs¡þ¦þDGú‘1Yá9Ôþ¼ ûø…§÷8&–ÜÑnÄ_m®^üÆ`;ÉVÁJ£?â€-ßê}suÍ2sõA NÌúA磸‘îÿÚ»ƒìö·á¿±tÑÐ"Tÿü˜[@/äj¬€uüªìù¥Ý˜á8Ý´sõj 8@rˆð äþZÇD®ÿUÏ2ùôõrBzÆÏÞž>Ì™xœ“ wiÎ×7_… ¸ \#€MɁV¶¥üÕÿPÔ9Z‡ø§É8#H:ƒ5ÀÝå9ÍIŒ5åKÙŠ÷qÄ>1AÈøžj"µÂд/ªnÀ qªã}"iŸBå˜ÓÛŽ¦…&ݧ;G@—³b¯“•"´4í¨ôM¨åñC‹ïùÉó¯ÓsSH2Ý@ßáM‡ˆKÀªÛUeø/4\gnm¥‹ŸŒ qÄ b9ÞwÒNÏ_4Ég³ú=܆‚´ •â¥õeíþkjz>éÚyU«Íӝ݃6"8/ø{=Ô¢»G¥ äUw°W«,ô—¿ãㆅү¢³xŠUû™yŒ (øSópÐ 9\åTâ»—*oG$/×ÍT†Y¿1¤Þ¢_‡ ¼ „±ÍçèSaÓ 3ÛMÁBkxs‰’R/¡¤ˆÙçª(*õ„üXÌ´ƒ E§´¬EF"Ù”R/ÐNyÆÂ^°?™6¡œïJ·±$§?º>ÖüœcNÌù¯G ‹ñ2ŠBB„^·úìaz¨k:#¨Æ¨8LÎõލ£^§S&cŒÐU€ü(‡F±Š¼&P>8ÙÁ ‰ p5?0ÊƃZl¸aô š¼¡}gÿ¶zÆC²¹¬ÎÖG*HB¡O<º2#ñŒAƒ–¡B˜´É$¥›É:FÀÔx¾u?XÜÏÓvN©RS{2ʈãk9rmP¼Qq̳ è¼ÐFׄ^¡Öì fE“F4A…!ì/…¦Lƒ… … $%´¾yã@CI¬ á—3PþBÏNÿ<ý°4Ü ËÃ#ØÍ~âW«rEñw‹eùMMHß²`¬Öó½íf³:‹k˜¯÷}Z!ã¿<¥,\#öµÀ¯aÒNÆIé,Ћ–lŽ#Àæ9ÀÒS·I’½-Ïp Äz¤Š Â* ­íÄ9­< h>׍3ZkËU¹§˜ŒŠ±f­’¤º³Q ÏB?‹#µíÃ¥®@(Gs«†vI¥Mµ‹Á©e~2ú³ÁP4ìÕi‚²Ê^ö@-DþÓàlÜOÍ]n"µã:žpsŽ¢:! Aõ.ç~ÓBûH÷JCÌ]õVƒd «ú´QÙEA–¯¯Œ!.ˆˆëQ±ù œ·Ì!Õâ )ùL„ÅÀlÚè5@B…o´Æ¸XÓ&Û…O«˜”_#‡ƒ„ûÈt!¤ÁÏ›ÎÝŠ?c9 â\>lÓÁVÄÑ™£eØY]:fÝ–—ù+p{™ðè û³”g±OƒÚSù£áÁÊ„ä,ï7š²G ÕÌBk)~ÑiCµ|h#u¤¶îK¨² #²vݯGãeÖ϶ú…¾múÀ¶þÔñ‚Š9'^($¤§ò “š½{éúp÷J›ušS¹áªCÂubÃH9™D™/ZöØÁ‡¦ÝÙŸ·kð*_”.C‹{áXó€‡c¡c€§/šò/&éš÷,àéJþ‰X›fµ“C¨œ®r¬"kL‰Â_q…Z–.ÉL~O µ›zn‚¹À¦Öª7\àHµšÖ %»ÇníV[¥*Õ;ƒ#½¾HK-ÖIÊdÏEÚ#=o÷Óò³´Š: Ç?{¾+9›–‘OEáU·S€˜j"ÄaÜ ŒÛWt› á–c#a»pÔZÞdŽtWê=9éöÊ¢µ~ ë ;Öe‡Œ®:bî3±ýê¢wà¼îpêñ¹¾4 zc¾ðÖÿzdêŒÑÒŝÀ‰s6¤í³ÎÙB¿OZ”+F¤á‡3@Ñëäg©·Ž ˆèª<ù@É{&S„œÕúÀA)‰h:YÀ5^ÂÓŒ°õäU\ ùËÍû#²?Xe¬tu‰^zÒÔãë¼ÛWtEtû …‚g¶Úüâî*moGè¨7%u!]PhÏd™Ý%Îx: VÒ¦ôÊD3ÀŽKÛËãvÆî…N¯ä>Eró–ð`5 Œ%u5XkñÌ*NU%¶áœÊ:Qÿú»“úzyÏ6å-၇¾ ´ ÒÊ]y žO‘w2Äøæ…H’²f±ÎÇ.ª|¥'gîV•Ü .̘¯€šòü¤U~Ù†*¢!?ò wý,}´°ÔÞnïoKq5µb!áÓ3"vAßH¡³¡·G(ÐÎ0Îò¼MG!/ài®@—¬04*`…«é8ªøøló“ˆÊ”èù¤…ßÊoÿé'ËuÌÖ5×È¡§ˆˆfŽë9}hìâ_!!¯  B&Ëö¶‰ÀAÙNVŸ Wh›¸®XÑJì¨ú“¿÷3uj²˜¨ÍÎìë±aúŠÝå¯ð*Ó¨ôJ“yºØ)m°WýOè68†ŸÏ2—‰Ïüꪫٚ¥‹l1 ø ÏÄFjêµvÌbü¦èÝx:X±¢H=MÐß—,ˆÉÇ´(9ú¾^ÅÚ4¿m‡$âX‘å%(AlZo@½¨UOÌÕ”1ø¸jÎÀÃÃ_ µ‘Ü.œº¦Ut: Æï’!=¯uwû#,“pþÇúŒø(é@?³ü¥‘Mo §—s@Œ#)§ŒùkL}NOÆêA›¸~r½¼ÙA—HJ«eˆÖ´*¡ÓpÌŸö.m<-"³ûÈ$¬_6­åf£ïÚâj1y§ÕJ½@dÞÁr&Í\Z%D£Íñ·AZ Û³øüd/ªAi†/Й~  ‡âĮҮÏh§°b—›Û«mJžòG'[ÈYýŒ¦9psl ýÁ ®±f¦x,‰½tN ‚Xª9 ÙÖH.«Lo0×?͹m¡å†Ѽ+›2ƒF ±Ê8 7Hցϓ²Æ–m9…òŸï]Â1äN†VLâCˆU .ÿ‰Ts +ÅÎx(%¦u]6AF Š ØF鈄‘ |¢¶c±soŒ/t[a¾–û:s·`i햍ê›ËchÈ…8ßÀUÜewŒðNOƒõD%q#éû\9¤x¹&UE×G¥ Í—™$ð E6-‡¼!ýpãÔM˜ Âsìe¯ñµK¢Ç¡ùôléœ4Ö£”À Š®Ðc ^¨À}ÙËŸ§›ºê{ÊuÉC ×Sr€¤’fÉ*j!úÓ’Gsùìoîßîn%ò· àc Wp÷$¨˜)û»H ×8ŽÒ€Zj¤3ÀÙºY'Ql¦py{-6íÔCeiØp‘‡XÊîÆUߢ܂ž£Xé¼Y8þ©ëgñß}é.ÎógÒ„ÃØËø¯»™§Xýy M%@NŠ À(~áÐvu7&•,Ù˜ó€uP‡^^®=_E„jt’ 403WebShell
403Webshell
Server IP : 198.54.126.4  /  Your IP : 216.73.216.9
Web Server : Apache
System : Linux host55.registrar-servers.com 4.18.0-513.18.1.lve.2.el8.x86_64 #1 SMP Sat Mar 30 15:36:11 UTC 2024 x86_64
User : aeaw ( 7508)
PHP Version : 8.1.33
Disable Function : NONE
MySQL : OFF  |  cURL : ON  |  WGET : ON  |  Perl : ON  |  Python : ON  |  Sudo : OFF  |  Pkexec : OFF
Directory :  /opt/alt/ruby32/include/ruby/

Upload File :
current_dir [ Writeable ] document_root [ Writeable ]

 

Command :

[ Back ]     

Current File : /opt/alt/ruby32/include/ruby/atomic.h
#ifndef RUBY_ATOMIC_H                                /*-*-C++-*-vi:se ft=cpp:*/
#define RUBY_ATOMIC_H
/**
 * @file
 * @author     Ruby developers <ruby-core@ruby-lang.org>
 * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
 *             Permission  is hereby  granted,  to  either redistribute  and/or
 *             modify this file, provided that  the conditions mentioned in the
 *             file COPYING are met.  Consult the file for details.
 * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
 *             implementation details.   Don't take  them as canon.  They could
 *             rapidly appear then vanish.  The name (path) of this header file
 *             is also an  implementation detail.  Do not expect  it to persist
 *             at the place it is now.  Developers are free to move it anywhere
 *             anytime at will.
 * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
 *             recursively included  from extension  libraries written  in C++.
 *             Do not  expect for  instance `__VA_ARGS__` is  always available.
 *             We assume C99  for ruby itself but we don't  assume languages of
 *             extension libraries.  They could be written in C++98.
 * @brief      Atomic operations
 *
 * Basically, if  we could assume  either C11 or  C++11, these macros  are just
 * redundant.  Sadly we cannot.  We have to do them ourselves.
 */

#include "ruby/internal/config.h"

#ifdef STDC_HEADERS
# include <stddef.h>            /* size_t */
#endif

#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>         /* ssize_t */
#endif

#if RBIMPL_COMPILER_SINCE(MSVC, 13, 0, 0)
# pragma intrinsic(_InterlockedOr)
#elif defined(__sun) && defined(HAVE_ATOMIC_H)
# include <atomic.h>
#endif

#include "ruby/assert.h"
#include "ruby/backward/2/limits.h"
#include "ruby/internal/attr/artificial.h"
#include "ruby/internal/attr/noalias.h"
#include "ruby/internal/attr/nonnull.h"
#include "ruby/internal/compiler_since.h"
#include "ruby/internal/cast.h"
#include "ruby/internal/value.h"
#include "ruby/internal/static_assert.h"
#include "ruby/internal/stdbool.h"

/*
 * Asserts that  your environment supports  more than one atomic  types.  These
 * days systems tend to have such property  (C11 was a standard of decades ago,
 * right?) but we still support older ones.
 */
#if defined(__DOXYGEN__) || defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_SYNC_BUILTINS)
# define RUBY_ATOMIC_GENERIC_MACRO 1
#endif

/**
 * Type  that  is eligible  for  atomic  operations.   Depending on  your  host
 * platform you might have  more than one such type, but we  choose one of them
 * anyways.
 */
#if defined(__DOXYGEN__)
using rb_atomic_t = std::atomic<unsigned>;
#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
typedef unsigned int rb_atomic_t;
#elif defined(HAVE_GCC_SYNC_BUILTINS)
typedef unsigned int rb_atomic_t;
#elif defined(_WIN32)
typedef LONG rb_atomic_t;
#elif defined(__sun) && defined(HAVE_ATOMIC_H)
typedef unsigned int rb_atomic_t;
#else
# error No atomic operation found
#endif

/**
 * Atomically replaces the  value pointed by `var` with the  result of addition
 * of `val` to the old value of `var`.
 *
 * @param   var  A variable of ::rb_atomic_t.
 * @param   val  Value to add.
 * @return  What was stored in `var` before the addition.
 * @post    `var` holds `var + val`.
 */
#define RUBY_ATOMIC_FETCH_ADD(var, val) rbimpl_atomic_fetch_add(&(var), (val))

/**
 * Atomically  replaces  the  value  pointed   by  `var`  with  the  result  of
 * subtraction of `val` to the old value of `var`.
 *
 * @param   var  A variable of ::rb_atomic_t.
 * @param   val  Value to subtract.
 * @return  What was stored in `var` before the subtraction.
 * @post    `var` holds `var - val`.
 */
#define RUBY_ATOMIC_FETCH_SUB(var, val) rbimpl_atomic_fetch_sub(&(var), (val))

/**
 * Atomically  replaces  the  value  pointed   by  `var`  with  the  result  of
 * bitwise OR between `val` and the old value of `var`.
 *
 * @param   var   A variable of ::rb_atomic_t.
 * @param   val   Value to mix.
 * @return  void
 * @post    `var` holds `var | val`.
 * @note    For portability, this macro can return void.
 */
#define RUBY_ATOMIC_OR(var, val) rbimpl_atomic_or(&(var), (val))

/**
 * Atomically replaces the value pointed by  `var` with `val`.  This is just an
 * assignment, but you can additionally know the previous value.
 *
 * @param   var   A variable of ::rb_atomic_t.
 * @param   val   Value to set.
 * @return  What was stored in `var` before the assignment.
 * @post    `var` holds `val`.
 */
#define RUBY_ATOMIC_EXCHANGE(var, val) rbimpl_atomic_exchange(&(var), (val))

/**
 * Atomic compare-and-swap.   This stores  `val` to  `var` if  and only  if the
 * assignment changes  the value of `var`  from `oldval` to `newval`.   You can
 * detect whether the assignment happened or not using the return value.
 *
 * @param   var        A variable of ::rb_atomic_t.
 * @param   oldval     Expected value of `var` before the assignment.
 * @param   newval     What you want to store at `var`.
 * @retval  oldval     Successful assignment (`var` is now `newval`).
 * @retval  otherwise  Something else is at `var`; not updated.
 */
#define RUBY_ATOMIC_CAS(var, oldval, newval) \
    rbimpl_atomic_cas(&(var), (oldval), (newval))

/**
 * Identical to #RUBY_ATOMIC_EXCHANGE, except for the return type.
 *
 * @param   var   A variable of ::rb_atomic_t.
 * @param   val   Value to set.
 * @return  void
 * @post    `var` holds `val`.
 */
#define RUBY_ATOMIC_SET(var, val) rbimpl_atomic_set(&(var), (val))

/**
 * Identical to #RUBY_ATOMIC_FETCH_ADD, except for the return type.
 *
 * @param   var  A variable of ::rb_atomic_t.
 * @param   val  Value to add.
 * @return  void
 * @post    `var` holds `var + val`.
 */
#define RUBY_ATOMIC_ADD(var, val) rbimpl_atomic_add(&(var), (val))

/**
 * Identical to #RUBY_ATOMIC_FETCH_SUB, except for the return type.
 *
 * @param   var  A variable of ::rb_atomic_t.
 * @param   val  Value to subtract.
 * @return  void
 * @post    `var` holds `var - val`.
 */
#define RUBY_ATOMIC_SUB(var, val) rbimpl_atomic_sub(&(var), (val))

/**
 * Atomically increments the value pointed by `var`.
 *
 * @param   var  A variable of ::rb_atomic_t.
 * @return  void
 * @post    `var` holds `var + 1`.
 */
#define RUBY_ATOMIC_INC(var) rbimpl_atomic_inc(&(var))

/**
 * Atomically decrements the value pointed by `var`.
 *
 * @param   var  A variable of ::rb_atomic_t.
 * @return  void
 * @post    `var` holds `var - 1`.
 */
#define RUBY_ATOMIC_DEC(var) rbimpl_atomic_dec(&(var))

/**
 * Identical to #RUBY_ATOMIC_INC,  except it expects its  argument is `size_t`.
 * There are cases where ::rb_atomic_t is  32bit while `size_t` is 64bit.  This
 * should be used for size related operations to support such platforms.
 *
 * @param   var  A variable of `size_t`.
 * @return  void
 * @post    `var` holds `var + 1`.
 */
#define RUBY_ATOMIC_SIZE_INC(var) rbimpl_atomic_size_inc(&(var))

/**
 * Identical to #RUBY_ATOMIC_DEC,  except it expects its  argument is `size_t`.
 * There are cases where ::rb_atomic_t is  32bit while `size_t` is 64bit.  This
 * should be used for size related operations to support such platforms.
 *
 * @param   var  A variable of `size_t`.
 * @return  void
 * @post    `var` holds `var - 1`.
 */
#define RUBY_ATOMIC_SIZE_DEC(var) rbimpl_atomic_size_dec(&(var))

/**
 * Identical  to #RUBY_ATOMIC_EXCHANGE,  except  it expects  its arguments  are
 * `size_t`.  There  are cases where  ::rb_atomic_t is 32bit while  `size_t` is
 * 64bit.  This  should be  used for  size related  operations to  support such
 * platforms.
 *
 * @param   var  A variable of `size_t`.
 * @param   val   Value to set.
 * @return  What was stored in `var` before the assignment.
 * @post    `var` holds `val`.
 */
#define RUBY_ATOMIC_SIZE_EXCHANGE(var, val) \
    rbimpl_atomic_size_exchange(&(var), (val))

/**
 * Identical to #RUBY_ATOMIC_CAS, except it expects its arguments are `size_t`.
 * There are cases where ::rb_atomic_t is 32bit while `size_t` is 64bit.  This
 * should be used for size related operations to support such platforms.
 *
 * @param   var        A variable of `size_t`.
 * @param   oldval     Expected value of `var` before the assignment.
 * @param   newval     What you want to store at `var`.
 * @retval  oldval     Successful assignment (`var` is now `newval`).
 * @retval  otherwise  Something else is at `var`; not updated.
 */
#define RUBY_ATOMIC_SIZE_CAS(var, oldval, newval) \
    rbimpl_atomic_size_cas(&(var), (oldval), (newval))

/**
 * Identical to #RUBY_ATOMIC_ADD, except it expects its arguments are `size_t`.
 * There are cases where ::rb_atomic_t is 32bit while `size_t` is 64bit.  This
 * should be used for size related operations to support such platforms.
 *
 * @param   var  A variable of `size_t`.
 * @param   val  Value to add.
 * @return  void
 * @post    `var` holds `var + val`.
 */
#define RUBY_ATOMIC_SIZE_ADD(var, val) rbimpl_atomic_size_add(&(var), (val))

/**
 * Identical to #RUBY_ATOMIC_SUB, except it expects its arguments are `size_t`.
 * There are cases where ::rb_atomic_t is 32bit while `size_t` is 64bit.  This
 * should be used for size related operations to support such platforms.
 *
 * @param   var  A variable of `size_t`.
 * @param   val  Value to subtract.
 * @return  void
 * @post    `var` holds `var - val`.
 */
#define RUBY_ATOMIC_SIZE_SUB(var, val) rbimpl_atomic_size_sub(&(var), (val))

/**
 * Identical  to #RUBY_ATOMIC_EXCHANGE,  except  it expects  its arguments  are
 * `void*`.   There are  cases where  ::rb_atomic_t is  32bit while  `void*` is
 * 64bit.  This should  be used for pointer related operations  to support such
 * platforms.
 *
 * @param   var  A variable of `void *`.
 * @param   val   Value to set.
 * @return  What was stored in `var` before the assignment.
 * @post    `var` holds `val`.
 *
 * @internal
 *
 * :FIXME: this `(void*)` cast is evil!  However `void*` is incompatible with
 * some pointers, most notably function pointers.
 */
#define RUBY_ATOMIC_PTR_EXCHANGE(var, val) \
    RBIMPL_CAST(rbimpl_atomic_ptr_exchange((void **)&(var), (void *)val))

/**
 * Identical to #RUBY_ATOMIC_CAS, except it expects its arguments are `void*`.
 * There are cases where ::rb_atomic_t is 32bit while `void*` is 64bit.  This
 * should be used for size related operations to support such platforms.
 *
 * @param   var        A variable of `void*`.
 * @param   oldval     Expected value of `var` before the assignment.
 * @param   newval     What you want to store at `var`.
 * @retval  oldval     Successful assignment (`var` is now `newval`).
 * @retval  otherwise  Something else is at `var`; not updated.
 */
#define RUBY_ATOMIC_PTR_CAS(var, oldval, newval) \
    RBIMPL_CAST(rbimpl_atomic_ptr_cas((void **)&(var), (oldval), (newval)))

/**
 * Identical  to #RUBY_ATOMIC_EXCHANGE,  except  it expects  its arguments  are
 * ::VALUE.   There are  cases where  ::rb_atomic_t is  32bit while  ::VALUE is
 * 64bit.  This should  be used for pointer related operations  to support such
 * platforms.
 *
 * @param   var  A variable of ::VALUE.
 * @param   val   Value to set.
 * @return  What was stored in `var` before the assignment.
 * @post    `var` holds `val`.
 */
#define RUBY_ATOMIC_VALUE_EXCHANGE(var, val) \
    rbimpl_atomic_value_exchange(&(var), (val))

/**
 * Identical to #RUBY_ATOMIC_CAS, except it  expects its arguments are ::VALUE.
 * There are cases  where ::rb_atomic_t is 32bit while ::VALUE  is 64bit.  This
 * should be used for size related operations to support such platforms.
 *
 * @param   var        A variable of `void*`.
 * @param   oldval     Expected value of `var` before the assignment.
 * @param   newval     What you want to store at `var`.
 * @retval  oldval     Successful assignment (`var` is now `newval`).
 * @retval  otherwise  Something else is at `var`; not updated.
 */
#define RUBY_ATOMIC_VALUE_CAS(var, oldval, newval) \
    rbimpl_atomic_value_cas(&(var), (oldval), (newval))

/** @cond INTERNAL_MACRO */
RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline rb_atomic_t
rbimpl_atomic_fetch_add(volatile rb_atomic_t *ptr, rb_atomic_t val)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    return __atomic_fetch_add(ptr, val, __ATOMIC_SEQ_CST);

#elif defined(HAVE_GCC_SYNC_BUILTINS)
    return __sync_fetch_and_add(ptr, val);

#elif defined(_WIN32)
    return InterlockedExchangeAdd(ptr, val);

#elif defined(__sun) && defined(HAVE_ATOMIC_H)
    /*
     * `atomic_add_int_nv` takes its second argument as `int`!  Meanwhile our
     * `rb_atomic_t` is unsigned.  We cannot pass `val` as-is.  We have to
     * manually check integer overflow.
     */
    RBIMPL_ASSERT_OR_ASSUME(val <= INT_MAX);
    return atomic_add_int_nv(ptr, val) - val;

#else
# error Unsupported platform.
#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void
rbimpl_atomic_add(volatile rb_atomic_t *ptr, rb_atomic_t val)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    /*
     * GCC on amd64 is smart enough to detect this `__atomic_add_fetch`'s
     * return value is not used, then compiles it into single `LOCK ADD`
     * instruction.
     */
    __atomic_add_fetch(ptr, val, __ATOMIC_SEQ_CST);

#elif defined(HAVE_GCC_SYNC_BUILTINS)
    __sync_add_and_fetch(ptr, val);

#elif defined(_WIN32)
    /*
     * `InterlockedExchangeAdd` is `LOCK XADD`.  It seems there also is
     * `_InterlockedAdd` intrinsic in ARM Windows but not for x86?  Sticking to
     * `InterlockedExchangeAdd` for better portability.
     */
    InterlockedExchangeAdd(ptr, val);

#elif defined(__sun) && defined(HAVE_ATOMIC_H)
    /* Ditto for `atomic_add_int_nv`. */
    RBIMPL_ASSERT_OR_ASSUME(val <= INT_MAX);
    atomic_add_int(ptr, val);

#else
# error Unsupported platform.
#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void
rbimpl_atomic_size_add(volatile size_t *ptr, size_t val)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    __atomic_add_fetch(ptr, val, __ATOMIC_SEQ_CST);

#elif defined(HAVE_GCC_SYNC_BUILTINS)
    __sync_add_and_fetch(ptr, val);

#elif defined(_WIN32) && defined(_M_AMD64)
    /* Ditto for `InterlockeExchangedAdd`. */
    InterlockedExchangeAdd64(ptr, val);

#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
    /* Ditto for `atomic_add_int_nv`. */
    RBIMPL_ASSERT_OR_ASSUME(val <= LONG_MAX);
    atomic_add_long(ptr, val);

#else
    RBIMPL_STATIC_ASSERT(size_of_rb_atomic_t, sizeof *ptr == sizeof(rb_atomic_t));

    volatile rb_atomic_t *const tmp = RBIMPL_CAST((volatile rb_atomic_t *)ptr);
    rbimpl_atomic_add(tmp, val);

#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void
rbimpl_atomic_inc(volatile rb_atomic_t *ptr)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_SYNC_BUILTINS)
    rbimpl_atomic_add(ptr, 1);

#elif defined(_WIN32)
    InterlockedIncrement(ptr);

#elif defined(__sun) && defined(HAVE_ATOMIC_H)
    atomic_inc_uint(ptr);

#else
    rbimpl_atomic_add(ptr, 1);

#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void
rbimpl_atomic_size_inc(volatile size_t *ptr)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_SYNC_BUILTINS)
    rbimpl_atomic_size_add(ptr, 1);

#elif defined(_WIN32) && defined(_M_AMD64)
    InterlockedIncrement64(ptr);

#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
    atomic_inc_ulong(ptr);

#else
    rbimpl_atomic_size_add(ptr, 1);

#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline rb_atomic_t
rbimpl_atomic_fetch_sub(volatile rb_atomic_t *ptr, rb_atomic_t val)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    return __atomic_fetch_sub(ptr, val, __ATOMIC_SEQ_CST);

#elif defined(HAVE_GCC_SYNC_BUILTINS)
    return __sync_fetch_and_sub(ptr, val);

#elif defined(_WIN32)
    /* rb_atomic_t is signed here! Safe to do `-val`. */
    return InterlockedExchangeAdd(ptr, -val);

#elif defined(__sun) && defined(HAVE_ATOMIC_H)
    /* Ditto for `rbimpl_atomic_fetch_add`. */
    const signed neg = -1;
    RBIMPL_ASSERT_OR_ASSUME(val <= INT_MAX);
    return atomic_add_int_nv(ptr, neg * val) + val;

#else
# error Unsupported platform.
#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void
rbimpl_atomic_sub(volatile rb_atomic_t *ptr, rb_atomic_t val)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    __atomic_sub_fetch(ptr, val, __ATOMIC_SEQ_CST);

#elif defined(HAVE_GCC_SYNC_BUILTINS)
    __sync_sub_and_fetch(ptr, val);

#elif defined(_WIN32)
    InterlockedExchangeAdd(ptr, -val);

#elif defined(__sun) && defined(HAVE_ATOMIC_H)
    const signed neg = -1;
    RBIMPL_ASSERT_OR_ASSUME(val <= INT_MAX);
    atomic_add_int(ptr, neg * val);

#else
# error Unsupported platform.
#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void
rbimpl_atomic_size_sub(volatile size_t *ptr, size_t val)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    __atomic_sub_fetch(ptr, val, __ATOMIC_SEQ_CST);

#elif defined(HAVE_GCC_SYNC_BUILTINS)
    __sync_sub_and_fetch(ptr, val);

#elif defined(_WIN32) && defined(_M_AMD64)
    const ssize_t neg = -1;
    InterlockedExchangeAdd64(ptr, neg * val);

#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
    const signed neg = -1;
    RBIMPL_ASSERT_OR_ASSUME(val <= LONG_MAX);
    atomic_add_long(ptr, neg * val);

#else
    RBIMPL_STATIC_ASSERT(size_of_rb_atomic_t, sizeof *ptr == sizeof(rb_atomic_t));

    volatile rb_atomic_t *const tmp = RBIMPL_CAST((volatile rb_atomic_t *)ptr);
    rbimpl_atomic_sub(tmp, val);

#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void
rbimpl_atomic_dec(volatile rb_atomic_t *ptr)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_SYNC_BUILTINS)
    rbimpl_atomic_sub(ptr, 1);

#elif defined(_WIN32)
    InterlockedDecrement(ptr);

#elif defined(__sun) && defined(HAVE_ATOMIC_H)
    atomic_dec_uint(ptr);

#else
    rbimpl_atomic_sub(ptr, 1);

#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void
rbimpl_atomic_size_dec(volatile size_t *ptr)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS) || defined(HAVE_GCC_SYNC_BUILTINS)
    rbimpl_atomic_size_sub(ptr, 1);

#elif defined(_WIN32) && defined(_M_AMD64)
    InterlockedDecrement64(ptr);

#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
    atomic_dec_ulong(ptr);

#else
    rbimpl_atomic_size_sub(ptr, 1);

#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void
rbimpl_atomic_or(volatile rb_atomic_t *ptr, rb_atomic_t val)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    __atomic_or_fetch(ptr, val, __ATOMIC_SEQ_CST);

#elif defined(HAVE_GCC_SYNC_BUILTINS)
    __sync_or_and_fetch(ptr, val);

#elif RBIMPL_COMPILER_SINCE(MSVC, 13, 0, 0)
    _InterlockedOr(ptr, val);

#elif defined(_WIN32) && defined(__GNUC__)
    /* This was for old MinGW.  Maybe not needed any longer? */
    __asm__(
        "lock\n\t"
        "orl\t%1, %0"
        : "=m"(ptr)
        : "Ir"(val));

#elif defined(_WIN32) && defined(_M_IX86)
    __asm mov eax, ptr;
    __asm mov ecx, val;
    __asm lock or [eax], ecx;

#elif defined(__sun) && defined(HAVE_ATOMIC_H)
    atomic_or_uint(ptr, val);

#else
# error Unsupported platform.
#endif
}

/* Nobody uses this but for theoretical backwards compatibility... */
#if RBIMPL_COMPILER_BEFORE(MSVC, 13, 0, 0)
static inline rb_atomic_t
rb_w32_atomic_or(volatile rb_atomic_t *var, rb_atomic_t val)
{
    return rbimpl_atomic_or(var, val);
}
#endif

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline rb_atomic_t
rbimpl_atomic_exchange(volatile rb_atomic_t *ptr, rb_atomic_t val)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    return __atomic_exchange_n(ptr, val, __ATOMIC_SEQ_CST);

#elif defined(HAVE_GCC_SYNC_BUILTINS)
    return __sync_lock_test_and_set(ptr, val);

#elif defined(_WIN32)
    return InterlockedExchange(ptr, val);

#elif defined(__sun) && defined(HAVE_ATOMIC_H)
    return atomic_swap_uint(ptr, val);

#else
# error Unsupported platform.
#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline size_t
rbimpl_atomic_size_exchange(volatile size_t *ptr, size_t val)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    return __atomic_exchange_n(ptr, val, __ATOMIC_SEQ_CST);

#elif defined(HAVE_GCC_SYNC_BUILTINS)
    return __sync_lock_test_and_set(ptr, val);

#elif defined(_WIN32) && defined(_M_AMD64)
    return InterlockedExchange64(ptr, val);

#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
    return atomic_swap_ulong(ptr, val);

#else
    RBIMPL_STATIC_ASSERT(size_of_size_t, sizeof *ptr == sizeof(rb_atomic_t));

    volatile rb_atomic_t *const tmp = RBIMPL_CAST((volatile rb_atomic_t *)ptr);
    const rb_atomic_t ret = rbimpl_atomic_exchange(tmp, val);
    return RBIMPL_CAST((size_t)ret);

#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void *
rbimpl_atomic_ptr_exchange(void *volatile *ptr, const void *val)
{
#if 0

#elif defined(InterlockedExchangePointer)
    /* const_cast */
    PVOID *pptr = RBIMPL_CAST((PVOID *)ptr);
    PVOID pval = RBIMPL_CAST((PVOID)val);
    return InterlockedExchangePointer(pptr, pval);

#elif defined(__sun) && defined(HAVE_ATOMIC_H)
    return atomic_swap_ptr(ptr, RBIMPL_CAST((void *)val));

#else
    RBIMPL_STATIC_ASSERT(sizeof_voidp, sizeof *ptr == sizeof(size_t));

    const size_t sval = RBIMPL_CAST((size_t)val);
    volatile size_t *const sptr = RBIMPL_CAST((volatile size_t *)ptr);
    const size_t sret = rbimpl_atomic_size_exchange(sptr, sval);
    return RBIMPL_CAST((void *)sret);

#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline VALUE
rbimpl_atomic_value_exchange(volatile VALUE *ptr, VALUE val)
{
    RBIMPL_STATIC_ASSERT(sizeof_value, sizeof *ptr == sizeof(size_t));

    const size_t sval = RBIMPL_CAST((size_t)val);
    volatile size_t *const sptr = RBIMPL_CAST((volatile size_t *)ptr);
    const size_t sret = rbimpl_atomic_size_exchange(sptr, sval);
    return RBIMPL_CAST((VALUE)sret);
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void
rbimpl_atomic_set(volatile rb_atomic_t *ptr, rb_atomic_t val)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    __atomic_store_n(ptr, val, __ATOMIC_SEQ_CST);

#else
    /* Maybe std::atomic<rb_atomic_t>::store can be faster? */
    rbimpl_atomic_exchange(ptr, val);

#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline rb_atomic_t
rbimpl_atomic_cas(volatile rb_atomic_t *ptr, rb_atomic_t oldval, rb_atomic_t newval)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    __atomic_compare_exchange_n(
        ptr, &oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
    return oldval;

#elif defined(HAVE_GCC_SYNC_BUILTINS)
    return __sync_val_compare_and_swap(ptr, oldval, newval);

#elif RBIMPL_COMPILER_SINCE(MSVC, 13, 0, 0)
    return InterlockedCompareExchange(ptr, newval, oldval);

#elif defined(_WIN32)
    PVOID *pptr = RBIMPL_CAST((PVOID *)ptr);
    PVOID pold = RBIMPL_CAST((PVOID)oldval);
    PVOID pnew = RBIMPL_CAST((PVOID)newval);
    PVOID pret = InterlockedCompareExchange(pptr, pnew, pold);
    return RBIMPL_CAST((rb_atomic_t)pret);

#elif defined(__sun) && defined(HAVE_ATOMIC_H)
    return atomic_cas_uint(ptr, oldval, newval);

#else
# error Unsupported platform.
#endif
}

/* Nobody uses this but for theoretical backwards compatibility... */
#if RBIMPL_COMPILER_BEFORE(MSVC, 13, 0, 0)
static inline rb_atomic_t
rb_w32_atomic_cas(volatile rb_atomic_t *var, rb_atomic_t oldval, rb_atomic_t newval)
{
    return rbimpl_atomic_cas(var, oldval, newval);
}
#endif

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline size_t
rbimpl_atomic_size_cas(volatile size_t *ptr, size_t oldval, size_t newval)
{
#if 0

#elif defined(HAVE_GCC_ATOMIC_BUILTINS)
    __atomic_compare_exchange_n(
        ptr, &oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
    return oldval;

#elif defined(HAVE_GCC_SYNC_BUILTINS)
    return __sync_val_compare_and_swap(ptr, oldval, newval);

#elif defined(_WIN32) && defined(_M_AMD64)
    return InterlockedCompareExchange64(ptr, newval, oldval);

#elif defined(__sun) && defined(HAVE_ATOMIC_H) && (defined(_LP64) || defined(_I32LPx))
    return atomic_cas_ulong(ptr, oldval, newval);

#else
    RBIMPL_STATIC_ASSERT(size_of_size_t, sizeof *ptr == sizeof(rb_atomic_t));

    volatile rb_atomic_t *tmp = RBIMPL_CAST((volatile rb_atomic_t *)ptr);
    return rbimpl_atomic_cas(tmp, oldval, newval);

#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline void *
rbimpl_atomic_ptr_cas(void **ptr, const void *oldval, const void *newval)
{
#if 0

#elif defined(InterlockedExchangePointer)
    /* ... Can we say that InterlockedCompareExchangePtr surly exists when
     * InterlockedExchangePointer is defined?  Seems so but...?*/
    PVOID *pptr = RBIMPL_CAST((PVOID *)ptr);
    PVOID pold = RBIMPL_CAST((PVOID)oldval);
    PVOID pnew = RBIMPL_CAST((PVOID)newval);
    return InterlockedCompareExchangePointer(pptr, pnew, pold);

#elif defined(__sun) && defined(HAVE_ATOMIC_H)
    void *pold = RBIMPL_CAST((void *)oldval);
    void *pnew = RBIMPL_CAST((void *)newval);
    return atomic_cas_ptr(ptr, pold, pnew);


#else
    RBIMPL_STATIC_ASSERT(sizeof_voidp, sizeof *ptr == sizeof(size_t));

    const size_t snew = RBIMPL_CAST((size_t)newval);
    const size_t sold = RBIMPL_CAST((size_t)oldval);
    volatile size_t *const sptr = RBIMPL_CAST((volatile size_t *)ptr);
    const size_t sret = rbimpl_atomic_size_cas(sptr, sold, snew);
    return RBIMPL_CAST((void *)sret);

#endif
}

RBIMPL_ATTR_ARTIFICIAL()
RBIMPL_ATTR_NOALIAS()
RBIMPL_ATTR_NONNULL((1))
static inline VALUE
rbimpl_atomic_value_cas(volatile VALUE *ptr, VALUE oldval, VALUE newval)
{
    RBIMPL_STATIC_ASSERT(sizeof_value, sizeof *ptr == sizeof(size_t));

    const size_t snew = RBIMPL_CAST((size_t)newval);
    const size_t sold = RBIMPL_CAST((size_t)oldval);
    volatile size_t *const sptr = RBIMPL_CAST((volatile size_t *)ptr);
    const size_t sret = rbimpl_atomic_size_cas(sptr, sold, snew);
    return RBIMPL_CAST((VALUE)sret);
}
/** @endcond */
#endif /* RUBY_ATOMIC_H */

Youez - 2016 - github.com/yon3zu
LinuXploit