{"id":38226,"date":"2026-01-26T11:00:46","date_gmt":"2026-01-26T08:00:46","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/napi-coklu-is-parcacigi-ortaminda-cokme-sorunlari-ve-guvenli-gelistirme-yaklasimlari\/"},"modified":"2026-01-26T11:00:46","modified_gmt":"2026-01-26T08:00:46","slug":"napi-coklu-is-parcacigi-ortaminda-cokme-sorunlari-ve-guvenli-gelistirme-yaklasimlari","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/napi-coklu-is-parcacigi-ortaminda-cokme-sorunlari-ve-guvenli-gelistirme-yaklasimlari\/","title":{"rendered":"NAPI \u00c7oklu \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 Ortam\u0131nda \u00c7\u00f6kme Sorunlar\u0131 ve G\u00fcvenli Geli\u015ftirme Yakla\u015f\u0131mlar\u0131"},"content":{"rendered":"

NAPI \u00c7oklu \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 Ortam\u0131nda \u00c7\u00f6kme Sorunlar\u0131 ve G\u00fcvenli Geli\u015ftirme Yakla\u015f\u0131mlar\u0131<\/h2>\n

Node.js, tek i\u015f par\u00e7ac\u0131kl\u0131, olay tabanl\u0131 mimarisiyle bilinse de, yo\u011fun CPU hesaplamalar\u0131 veya bloklay\u0131c\u0131 I\/O i\u015flemleri gerektiren senaryolarda bu model performans darbo\u011fazlar\u0131na yol a\u00e7abilir. Bu noktada, Node.js yerel eklentileri (native addons) devreye girer ve C++ gibi dillerde yaz\u0131lm\u0131\u015f y\u00fcksek performansl\u0131 kodlar\u0131n Node.js ortam\u0131na entegre edilmesini sa\u011flar. Node-API (NAPI), bu eklentilerin platformdan ba\u011f\u0131ms\u0131z ve Node.js s\u00fcr\u00fcmleri aras\u0131nda uyumlu olmas\u0131n\u0131 sa\u011flayan bir aray\u00fczd\u00fcr. Ancak, NAPI ile \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 (multithreading) kullan\u0131ld\u0131\u011f\u0131nda, \u00f6zellikle bellek y\u00f6netimi ve veri senkronizasyonu konular\u0131nda dikkatli olunmazsa ciddi \u00e7\u00f6kme sorunlar\u0131yla kar\u015f\u0131la\u015fmak ka\u00e7\u0131n\u0131lmazd\u0131r. Bu makale, NAPI \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 \u00e7\u00f6kme sorunlar\u0131n\u0131n k\u00f6kenlerini, yayg\u0131n senaryolar\u0131n\u0131, sorun giderme y\u00f6ntemlerini ve g\u00fcvenli geli\u015ftirme yakla\u015f\u0131mlar\u0131n\u0131 detayl\u0131 bir \u015fekilde inceleyecektir.<\/p>\n

NAPI ve \u00c7oklu \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 Kavram\u0131<\/h3>\n

NAPI, Node.js ekosisteminde C\/C++ yerel eklentileri geli\u015ftirmek i\u00e7in kullan\u0131lan kararl\u0131 bir API’dir. Node.js’in farkl\u0131 s\u00fcr\u00fcmleri aras\u0131nda ikili uyumlulu\u011fu garanti ederek, eklenti geli\u015ftiricilerinin her Node.js s\u00fcr\u00fcm\u00fc i\u00e7in yeniden derleme yapma zorunlulu\u011funu ortadan kald\u0131r\u0131r.<\/p>\n

NAPI Nedir?<\/h4>\n

NAPI (Node-API), Node.js’in temel C++ API’sidir ve JavaScript ile C\/C++ kodlar\u0131 aras\u0131nda bir k\u00f6pr\u00fc g\u00f6revi g\u00f6r\u00fcr. Geli\u015ftiricilerin, performans kritik algoritmalar\u0131 veya mevcut C\/C++ k\u00fct\u00fcphanelerini Node.js uygulamalar\u0131na entegre etmelerini sa\u011flar. Bu sayede, Node.js’in tek i\u015f par\u00e7ac\u0131kl\u0131 do\u011fas\u0131ndan kaynaklanan baz\u0131 performans s\u0131n\u0131rlamalar\u0131 a\u015f\u0131labilir.<\/p>\n

Node.js Ortam\u0131nda \u00c7oklu \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 \u0130htiyac\u0131<\/h4>\n

Node.js, olay d\u00f6ng\u00fcs\u00fc (event loop) \u00fczerinde tek bir i\u015f par\u00e7ac\u0131\u011f\u0131 ile \u00e7al\u0131\u015f\u0131r. Bu, \u00e7o\u011fu I\/O yo\u011fun uygulama i\u00e7in verimli olsa da, uzun s\u00fcreli CPU yo\u011fun hesaplamalar olay d\u00f6ng\u00fcs\u00fcn\u00fc bloke ederek uygulaman\u0131n yan\u0131t veremez hale gelmesine neden olabilir. Bu t\u00fcr senaryolarda, NAPI eklentileri arac\u0131l\u0131\u011f\u0131yla C++ taraf\u0131nda yeni i\u015f par\u00e7ac\u0131klar\u0131 olu\u015fturarak bu hesaplamalar\u0131 ana olay d\u00f6ng\u00fcs\u00fcnden ay\u0131rmak, uygulaman\u0131n genel performans\u0131n\u0131 ve yan\u0131t verebilirli\u011fini art\u0131rman\u0131n etkili bir yoludur.<\/p>\n

NAPI’nin Asenkron ve \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 Deste\u011fi<\/h4>\n

NAPI, asenkron i\u015flemleri ve i\u015f par\u00e7ac\u0131\u011f\u0131 g\u00fcvenli geri \u00e7a\u011f\u0131rma mekanizmalar\u0131n\u0131 destekler. \u00d6zellikle napi_create_async_work<\/code> ve napi_create_threadsafe_function<\/code> gibi API’ler, arka plan i\u015f par\u00e7ac\u0131klar\u0131nda i\u015flemler yap\u0131p sonu\u00e7lar\u0131 g\u00fcvenli bir \u015fekilde JavaScript olay d\u00f6ng\u00fcs\u00fcne geri iletmek i\u00e7in tasarlanm\u0131\u015ft\u0131r. Ancak bu ara\u00e7lar\u0131n do\u011fru kullan\u0131m\u0131, \u00e7\u00f6kme sorunlar\u0131n\u0131 \u00f6nlemek i\u00e7in hayati \u00f6nem ta\u015f\u0131r.<\/p>\n

\u00c7oklu \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 Ortam\u0131nda NAPI Kullan\u0131m\u0131n\u0131n Zorluklar\u0131<\/h3>\n

\u00c7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 programlama, do\u011fas\u0131 gere\u011fi karma\u015f\u0131kt\u0131r ve NAPI ile birle\u015fti\u011finde \u00f6zel dikkat gerektirir. Temel zorluklar, payla\u015f\u0131lan kaynaklar\u0131n y\u00f6netimi ve i\u015f par\u00e7ac\u0131klar\u0131 aras\u0131 ileti\u015fimin g\u00fcvenli bir \u015fekilde sa\u011flanmas\u0131 etraf\u0131nda d\u00f6ner.<\/p>\n

Payla\u015f\u0131lan Durum Y\u00f6netimi<\/h4>\n

Birden fazla i\u015f par\u00e7ac\u0131\u011f\u0131 ayn\u0131 bellek alan\u0131na veya veri yap\u0131s\u0131na e\u015f zamanl\u0131 olarak eri\u015fmeye \u00e7al\u0131\u015ft\u0131\u011f\u0131nda, veri tutars\u0131zl\u0131klar\u0131 veya \u00e7\u00f6kme riski ortaya \u00e7\u0131kar. NAPI eklentilerinde, JavaScript’ten gelen verilerin C++ taraf\u0131nda i\u015flenip payla\u015f\u0131lan duruma yaz\u0131lmas\u0131 veya okunmas\u0131 bu t\u00fcr sorunlara yol a\u00e7abilir. Payla\u015f\u0131lan de\u011fi\u015fkenler, nesneler veya kaynaklar uygun senkronizasyon mekanizmalar\u0131 olmadan kullan\u0131ld\u0131\u011f\u0131nda tehlikeli hale gelir.<\/p>\n

Yar\u0131\u015f Ko\u015fullar\u0131 (Race Conditions) ve Kilitlenmeler (Deadlocks)<\/h4>\n

Yar\u0131\u015f ko\u015fullar\u0131, iki veya daha fazla i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n payla\u015f\u0131lan bir kayna\u011fa ayn\u0131 anda eri\u015fmeye \u00e7al\u0131\u015fmas\u0131 ve i\u015flemin sonucunun i\u015f par\u00e7ac\u0131klar\u0131n\u0131n g\u00f6receli y\u00fcr\u00fctme s\u0131ras\u0131na ba\u011fl\u0131 olmas\u0131 durumunda ortaya \u00e7\u0131kar. Bu, \u00f6ng\u00f6r\u00fclemeyen davran\u0131\u015flara ve veri bozulmas\u0131na neden olabilir. Kilitlenmeler ise, iki veya daha fazla i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n birbirlerinin kaynaklar\u0131n\u0131 serbest b\u0131rakmas\u0131n\u0131 beklemesi ve b\u00f6ylece hi\u00e7birinin ilerleyememesi durumudur. Her iki senaryo da uygulaman\u0131n kilitlenmesine veya \u00e7\u00f6kmesine yol a\u00e7abilir.<\/p>\n

Bellek Y\u00f6netimi ve Ya\u015fam D\u00f6ng\u00fcs\u00fc Sorunlar\u0131<\/h4>\n

NAPI eklentilerinde bellek y\u00f6netimi, C++’\u0131n manuel bellek y\u00f6netimi ile Node.js’in \u00e7\u00f6p toplay\u0131c\u0131s\u0131 (garbage collector) aras\u0131nda bir k\u00f6pr\u00fc g\u00f6revi g\u00f6rd\u00fc\u011f\u00fc i\u00e7in daha da karma\u015f\u0131kt\u0131r. Bir i\u015f par\u00e7ac\u0131\u011f\u0131nda tahsis edilen belle\u011fin ba\u015fka bir i\u015f par\u00e7ac\u0131\u011f\u0131nda serbest b\u0131rak\u0131lmas\u0131 veya bir nesnenin \u00e7\u00f6p toplay\u0131c\u0131 taraf\u0131ndan toplanmadan \u00f6nce ba\u015fka bir i\u015f par\u00e7ac\u0131\u011f\u0131 taraf\u0131ndan hala kullan\u0131l\u0131yor olmas\u0131 (use-after-free) yayg\u0131n \u00e7\u00f6kme nedenleridir. NAPI de\u011ferlerinin (napi_value<\/code>) i\u015f par\u00e7ac\u0131klar\u0131 aras\u0131nda do\u011frudan payla\u015f\u0131lmas\u0131 da tehlikelidir, \u00e7\u00fcnk\u00fc bu de\u011ferler V8 motorunun ana i\u015f par\u00e7ac\u0131\u011f\u0131na ba\u011fl\u0131d\u0131r ve di\u011fer i\u015f par\u00e7ac\u0131klar\u0131nda ge\u00e7erli olmayabilir.<\/p>\n

Yayg\u0131n NAPI \u00c7oklu \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 \u00c7\u00f6kme Senaryolar\u0131<\/h3>\n

NAPI ile \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 kullan\u0131rken kar\u015f\u0131la\u015f\u0131lan \u00e7\u00f6kme sorunlar\u0131 genellikle belirli kal\u0131plar\u0131 takip eder. Bu senaryolar\u0131 anlamak, sorunlar\u0131 \u00f6nlemede ve gidermede kritik \u00f6neme sahiptir.<\/p>\n

Ge\u00e7ersiz Bellek Eri\u015fimi (Use-After-Free, Double-Free)<\/h4>\n

Bu, en tehlikeli ve yayg\u0131n \u00e7\u00f6kme nedenlerinden biridir. Bir nesne veya bellek blo\u011fu bir i\u015f par\u00e7ac\u0131\u011f\u0131nda serbest b\u0131rak\u0131ld\u0131ktan sonra, ba\u015fka bir i\u015f par\u00e7ac\u0131\u011f\u0131 hala bu bellek adresine eri\u015fmeye \u00e7al\u0131\u015f\u0131rsa “use-after-free” hatas\u0131 olu\u015fur. Benzer \u015fekilde, ayn\u0131 bellek alan\u0131n\u0131n birden fazla kez serbest b\u0131rak\u0131lmas\u0131 “double-free” hatas\u0131na yol a\u00e7ar. Her ikisi de bellek bozulmas\u0131na ve uygulaman\u0131n \u00e7\u00f6kmesine neden olur.<\/p>\n

Veri Yar\u0131\u015flar\u0131 ve Tutars\u0131z Durumlar<\/h4>\n

Senkronizasyon mekanizmalar\u0131 (mutex’ler, kilitler) olmadan payla\u015f\u0131lan verilere e\u015f zamanl\u0131 yazma\/okuma i\u015flemleri veri yar\u0131\u015flar\u0131na yol a\u00e7ar. \u00d6rne\u011fin, bir saya\u00e7 de\u011fi\u015fkenine birden fazla i\u015f par\u00e7ac\u0131\u011f\u0131 ayn\u0131 anda eri\u015fip art\u0131rmaya \u00e7al\u0131\u015ft\u0131\u011f\u0131nda, nihai de\u011fer yanl\u0131\u015f olabilir. Bu t\u00fcr tutars\u0131z durumlar, uygulaman\u0131n mant\u0131ksal hatalar vermesine veya beklenmedik \u00e7\u00f6k\u00fc\u015flere neden olabilir.<\/p>\n

NAPI De\u011ferlerinin \u0130\u015f Par\u00e7ac\u0131klar\u0131 Aras\u0131nda G\u00fcvenli Olmayan Kullan\u0131m\u0131<\/h4>\n

napi_value<\/code> t\u00fcr\u00fcndeki JavaScript de\u011ferleri, yaln\u0131zca Node.js’in ana olay d\u00f6ng\u00fcs\u00fcn\u00fcn \u00e7al\u0131\u015ft\u0131\u011f\u0131 i\u015f par\u00e7ac\u0131\u011f\u0131nda ge\u00e7erlidir. Bir arka plan i\u015f par\u00e7ac\u0131\u011f\u0131ndan do\u011frudan bir napi_value<\/code>‘ya eri\u015fmeye \u00e7al\u0131\u015fmak, tan\u0131ms\u0131z davran\u0131\u015flara ve genellikle uygulaman\u0131n an\u0131nda \u00e7\u00f6kmesine yol a\u00e7ar. JavaScript’e geri \u00e7a\u011fr\u0131 yapmak veya JavaScript de\u011ferlerini arka plan i\u015f par\u00e7ac\u0131klar\u0131nda kullanmak i\u00e7in napi_create_threadsafe_function<\/code> gibi \u00f6zel NAPI mekanizmalar\u0131 kullan\u0131lmal\u0131d\u0131r.<\/p>\n

Hatal\u0131 Kaynak Serbest B\u0131rakma<\/h4>\n

Dosya tan\u0131t\u0131c\u0131lar\u0131, a\u011f soketleri veya veritaban\u0131 ba\u011flant\u0131lar\u0131 gibi i\u015fletim sistemi kaynaklar\u0131 da \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 ortam\u0131nda dikkatli y\u00f6netilmelidir. Bir i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n bir kayna\u011f\u0131 a\u00e7\u0131p, ba\u015fka bir i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n onu kapatmaya \u00e7al\u0131\u015fmas\u0131 veya kaynaklar\u0131n do\u011fru zamanda serbest b\u0131rak\u0131lmamas\u0131, kaynak s\u0131z\u0131nt\u0131lar\u0131na veya \u00e7\u00f6k\u00fc\u015flere yol a\u00e7abilir.<\/p>\n

Sorun Giderme ve Hata Ay\u0131klama Yakla\u015f\u0131mlar\u0131<\/h3>\n

\u00c7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 \u00e7\u00f6kme sorunlar\u0131n\u0131 tespit etmek ve d\u00fczeltmek, genellikle tek i\u015f par\u00e7ac\u0131kl\u0131 hatalardan daha zordur. Do\u011fru ara\u00e7lar ve metodolojiler bu s\u00fcre\u00e7te kritik \u00f6neme sahiptir.<\/p>\n

Geleneksel C++ Hata Ay\u0131klama Ara\u00e7lar\u0131 (GDB, LLDB, Valgrind)<\/h4>\n
    \n
  • GDB\/LLDB:<\/strong> Bu hata ay\u0131klay\u0131c\u0131lar, \u00e7\u00f6kme an\u0131nda y\u0131\u011f\u0131n izini (stack trace) incelemek, de\u011fi\u015fken de\u011ferlerini kontrol etmek ve kesme noktalar\u0131 (breakpoints) ayarlayarak kodun ad\u0131m ad\u0131m y\u00fcr\u00fct\u00fclmesini izlemek i\u00e7in vazge\u00e7ilmezdir. \u00d6zellikle \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 deste\u011fi sayesinde, farkl\u0131 i\u015f par\u00e7ac\u0131klar\u0131n\u0131n durumunu izlemek m\u00fcmk\u00fcnd\u00fcr.<\/li>\n
  • Valgrind:<\/strong> Bellek hatalar\u0131n\u0131 (use-after-free, double-free, bellek s\u0131z\u0131nt\u0131lar\u0131) tespit etmek i\u00e7in m\u00fckemmel bir ara\u00e7t\u0131r. NAPI eklentilerinin bellek kullan\u0131m\u0131n\u0131 analiz ederek gizli sorunlar\u0131 ortaya \u00e7\u0131karabilir.<\/li>\n<\/ul>\n

    Node.js Hata Ay\u0131klama Entegrasyonu<\/h4>\n

    Node.js, yerle\u015fik bir hata ay\u0131klama protokol\u00fcne sahiptir. NAPI eklentileriyle \u00e7al\u0131\u015f\u0131rken, Node.js uygulamas\u0131n\u0131 --inspect<\/code> bayra\u011f\u0131yla ba\u015flat\u0131p Chrome DevTools veya VS Code gibi IDE’lerin hata ay\u0131klay\u0131c\u0131lar\u0131n\u0131 kullanarak JavaScript ve C++ kodlar\u0131 aras\u0131nda ge\u00e7i\u015f yaparak hata ay\u0131klama yapmak m\u00fcmk\u00fcnd\u00fcr. Bu, \u00f6zellikle napi_create_threadsafe_function<\/code> \u00fczerinden JavaScript’e geri d\u00f6nen de\u011ferlerdeki sorunlar\u0131 izlemek i\u00e7in faydal\u0131d\u0131r.<\/p>\n

    G\u00fcnl\u00fckleme (Logging) ve \u0130zleme<\/h4>\n

    Kapsaml\u0131 g\u00fcnl\u00fckleme, \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 sorunlar\u0131n\u0131 te\u015fhis etmede en basit ama etkili y\u00f6ntemlerden biridir. \u0130\u015f par\u00e7ac\u0131klar\u0131n\u0131n ne zaman ba\u015flad\u0131\u011f\u0131n\u0131, ne zaman kritik b\u00f6l\u00fcmlere girdi\u011fini\/\u00e7\u0131kt\u0131\u011f\u0131n\u0131, hangi verileri i\u015fledi\u011fini ve ne zaman sonland\u0131\u011f\u0131n\u0131 kaydetmek, olaylar\u0131n s\u0131ras\u0131n\u0131 ve olas\u0131 yar\u0131\u015f ko\u015fullar\u0131n\u0131 anlamaya yard\u0131mc\u0131 olabilir. Geli\u015fmi\u015f izleme ara\u00e7lar\u0131 da (\u00f6rne\u011fin, performans profilleme ara\u00e7lar\u0131) darbo\u011fazlar\u0131 ve kilitlenmeleri g\u00f6rselle\u015ftirebilir.<\/p>\n

    G\u00fcvenli \u00c7oklu \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 \u0130\u00e7in NAPI En \u0130yi Uygulamalar\u0131<\/h3>\n

    NAPI ile \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 kullan\u0131rken g\u00fcvenli\u011fi sa\u011flamak i\u00e7in belirli en iyi uygulamalara uymak \u015fartt\u0131r. Bu uygulamalar, \u00e7\u00f6kme riskini minimize eder ve kararl\u0131 eklentiler olu\u015fturman\u0131za yard\u0131mc\u0131 olur.<\/p>\n

    napi_create_threadsafe_function<\/code> Kullan\u0131m\u0131<\/h4>\n

    Bu, arka plan i\u015f par\u00e7ac\u0131klar\u0131ndan JavaScript’e geri \u00e7a\u011fr\u0131 yapman\u0131n birincil ve g\u00fcvenli yoludur. napi_create_threadsafe_function<\/code>, bir JavaScript fonksiyonunu i\u015f par\u00e7ac\u0131\u011f\u0131 g\u00fcvenli bir \u015fekilde temsil eder ve napi_call_threadsafe_function<\/code> ile herhangi bir i\u015f par\u00e7ac\u0131\u011f\u0131ndan \u00e7a\u011fr\u0131labilir. Bu, JavaScript olay d\u00f6ng\u00fcs\u00fcn\u00fc bloke etmeden sonu\u00e7lar\u0131 veya ilerlemeyi bildirmek i\u00e7in kullan\u0131l\u0131r. JavaScript de\u011ferlerini do\u011frudan i\u015f par\u00e7ac\u0131klar\u0131 aras\u0131nda ge\u00e7irmek yerine, bu mekanizma ile iletilmelidir.<\/p>\n

    Mutex ve Kilit Mekanizmalar\u0131<\/h4>\n

    Payla\u015f\u0131lan verilere eri\u015fimi senkronize etmek i\u00e7in C++’\u0131n standart k\u00fct\u00fcphanesindeki mutex’ler (std::mutex<\/code>) ve kilitler (std::lock_guard<\/code>, std::unique_lock<\/code>) kullan\u0131lmal\u0131d\u0131r. Kritik b\u00f6l\u00fcmler (yani, payla\u015f\u0131lan verilere eri\u015fen kod par\u00e7alar\u0131) bu kilitlerle korunarak veri yar\u0131\u015flar\u0131 \u00f6nlenir. Kilitlenmeleri \u00f6nlemek i\u00e7in kilit s\u0131ras\u0131na dikkat etmek ve minimum s\u00fcrede kilit tutmak \u00f6nemlidir.<\/p>\n

    Atomik \u0130\u015flemler<\/h4>\n

    Basit veri t\u00fcrleri (\u00f6rne\u011fin, say\u0131lar veya boolean de\u011ferler) i\u00e7in, atomik i\u015flemler (std::atomic<\/code>) kullanmak, kilit mekanizmalar\u0131na g\u00f6re daha hafif bir senkronizasyon y\u00f6ntemi sunar. Atomik i\u015flemler, bir de\u011fi\u015fkenin okunmas\u0131 veya yaz\u0131lmas\u0131 gibi temel i\u015flemlerin kesintisiz ve di\u011fer i\u015f par\u00e7ac\u0131klar\u0131 taraf\u0131ndan g\u00f6zlemlenemeyecek \u015fekilde tamamlanmas\u0131n\u0131 garanti eder.<\/p>\n

    Veri Yap\u0131lar\u0131n\u0131n \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 G\u00fcvenli Hale Getirilmesi<\/h4>\n

    Kendi \u00f6zel veri yap\u0131lar\u0131n\u0131z\u0131 kullan\u0131yorsan\u0131z, bunlar\u0131n i\u015f par\u00e7ac\u0131\u011f\u0131 g\u00fcvenli oldu\u011fundan emin olmal\u0131s\u0131n\u0131z. Bu genellikle, veri yap\u0131s\u0131n\u0131n i\u00e7indeki t\u00fcm payla\u015f\u0131lan verilere eri\u015fimi korumak i\u00e7in uygun mutex’ler eklemek anlam\u0131na gelir. Alternatif olarak, TBB (Threading Building Blocks) veya Concurrency Kit gibi k\u00fct\u00fcphanelerin sundu\u011fu i\u015f par\u00e7ac\u0131\u011f\u0131 g\u00fcvenli veri yap\u0131lar\u0131n\u0131 kullanmak da iyi bir yakla\u015f\u0131md\u0131r.<\/p>\n

    \u00d6rnek Kod \u0130ncelemesi: G\u00fcvenli NAPI \u00c7oklu \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 Uygulamas\u0131<\/h3>\n

    A\u015fa\u011f\u0131da, NAPI kullanarak basit bir arka plan hesaplamas\u0131 yapan ve sonucu napi_create_threadsafe_function<\/code> arac\u0131l\u0131\u011f\u0131yla JavaScript’e geri ileten bir C++ eklenti \u00f6rne\u011fi bulunmaktad\u0131r. Bu \u00f6rnek, g\u00fcvenli \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 prensiplerini g\u00f6stermektedir.<\/p>\n

    \n#include \n#include \n#include \n\n\/\/ Arka plan i\u015f par\u00e7ac\u0131\u011f\u0131nda \u00e7al\u0131\u015facak veri yap\u0131s\u0131\nstruct ThreadData {\n    napi_threadsafe_function tsfn;\n    int input_value;\n    int result_value;\n};\n\n\/\/ Arka plan i\u015f par\u00e7ac\u0131\u011f\u0131 fonksiyonu\nvoid BackgroundWork(ThreadData* data) {\n    \/\/ Yo\u011fun bir hesaplama sim\u00fclasyonu\n    std::this_thread::sleep_for(std::chrono::seconds(2));\n    data->result_value = data->input_value * 2;\n\n    \/\/ Sonucu JavaScript'e geri g\u00f6ndermek i\u00e7in threadsafe_function'\u0131 \u00e7a\u011f\u0131r\n    \/\/ napi_call_threadsafe_function, JavaScript olay d\u00f6ng\u00fcs\u00fcnde callback'i tetikler.\n    napi_call_threadsafe_function(data->tsfn, data, napi_tsfn_blocking);\n\n    \/\/ \u0130\u015flem bitti\u011finde threadsafe_function'\u0131 serbest b\u0131rak\n    napi_release_threadsafe_function(data->tsfn, napi_tsfn_release);\n    delete data; \/\/ Belle\u011fi serbest b\u0131rak\n}\n\n\/\/ JavaScript'ten \u00e7a\u011fr\u0131lan fonksiyon\nNapi::Value StartCalculation(const Napi::CallbackInfo& info) {\n    Napi::Env env = info.Env();\n\n    if (info.Length() < 2 || !info[0].IsNumber() || !info[1].IsFunction()) {\n        Napi::TypeError::New(env, \"Beklenen: (say\u0131, fonksiyon)\").ThrowAsJavaScriptException();\n        return env.Undefined();\n    }\n\n    int input = info[0].As().Int32Value();\n    Napi::Function js_callback = info[1].As();\n\n    ThreadData* data = new ThreadData();\n    data->input_value = input;\n\n    \/\/ Threadsafe fonksiyonu olu\u015ftur\n    \/\/ Bu, JavaScript callback'ini arka plan i\u015f par\u00e7ac\u0131\u011f\u0131ndan g\u00fcvenli bir \u015fekilde \u00e7a\u011f\u0131rmam\u0131z\u0131 sa\u011flar.\n    data->tsfn = napi_create_threadsafe_function(\n        env,\n        js_callback,\n        Napi::String::New(env, \"MyCallback\"),\n        0, \/\/ max_queue_size (0 = s\u0131n\u0131rs\u0131z)\n        1, \/\/ initial_thread_count (i\u015f par\u00e7ac\u0131\u011f\u0131 say\u0131s\u0131)\n        nullptr, \/\/ finalize_data (threadsafe_function serbest b\u0131rak\u0131ld\u0131\u011f\u0131nda \u00e7a\u011fr\u0131l\u0131r)\n        [](napi_env env, void* finalize_data, void* context) {\n            \/\/ finalize_data ve context'i burada serbest b\u0131rak\n            \/\/ Bu \u00f6rnekte ThreadData'y\u0131 BackgroundWork i\u00e7inde siliyoruz.\n        },\n        data, \/\/ context (callback'e iletilen veri)\n        [](napi_env env, napi_value js_callback, void* context, void* data) {\n            \/\/ Bu callback, JavaScript olay d\u00f6ng\u00fcs\u00fcnde \u00e7al\u0131\u015f\u0131r.\n            \/\/ Arka plan i\u015f par\u00e7ac\u0131\u011f\u0131ndan gelen veriyi i\u015fler ve JavaScript'e iletir.\n            ThreadData* thread_data = static_cast(data);\n            Napi::HandleScope scope(env); \/\/ Yeni bir scope olu\u015ftur\n\n            Napi::Value result = Napi::Number::New(env, thread_data->result_value);\n            Napi::Function cb = Napi::Function(env, js_callback);\n            cb.Call({result});\n        }\n    );\n\n    \/\/ Arka plan i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 ba\u015flat\n    std::thread worker(BackgroundWork, data);\n    worker.detach(); \/\/ \u0130\u015f par\u00e7ac\u0131\u011f\u0131n\u0131n kendi kendine \u00e7al\u0131\u015fmas\u0131na izin ver\n\n    return env.Undefined();\n}\n\nNapi::Object Init(Napi::Env env, Napi::Object exports) {\n    exports.Set(Napi::String::New(env, \"startCalculation\"), Napi::Function::New(env, StartCalculation));\n    return exports;\n}\n\nNODE_API_MODULE(NODE_GYP_MODULE_NAME, Init)\n<\/pre>\n
    <\/code><\/p>\n
    Basit Bir Thread-Safe Fonksiyon \u00d6rne\u011fi<\/h4>\n
    Yukar\u0131daki kod, ThreadData<\/code> yap\u0131s\u0131n\u0131 kullanarak arka plan i\u015f par\u00e7ac\u0131\u011f\u0131na veri iletiyor ve napi_create_threadsafe_function<\/code> ile JavaScript callback'ini olu\u015fturuyor. BackgroundWork<\/code> fonksiyonu, hesaplamay\u0131 yapar ve sonucu napi_call_threadsafe_function<\/code> ile geri g\u00f6nderir. Bu, JavaScript olay d\u00f6ng\u00fcs\u00fcn\u00fc bloke etmeden asenkron bir i\u015flemi tamamlaman\u0131n g\u00fcvenli yoludur.<\/p>\n
    NAPI Callback Mekanizmas\u0131<\/h4>\n
    napi_create_threadsafe_function<\/code>'\u0131n son arg\u00fcman\u0131 olan \"call_js_cb\" callback'i, JavaScript olay d\u00f6ng\u00fcs\u00fcnde \u00e7al\u0131\u015f\u0131r. Bu, arka plan i\u015f par\u00e7ac\u0131\u011f\u0131ndan gelen verileri g\u00fcvenli bir \u015fekilde JavaScript de\u011ferlerine d\u00f6n\u00fc\u015ft\u00fcrmek ve orijinal JavaScript fonksiyonunu \u00e7a\u011f\u0131rmak i\u00e7in ideal bir yerdir. Bu mekanizma, V8 motorunun tek i\u015f par\u00e7ac\u0131kl\u0131 do\u011fas\u0131n\u0131 korurken, C++ i\u015f par\u00e7ac\u0131klar\u0131n\u0131n sonu\u00e7lar\u0131n\u0131 Node.js'e aktarmas\u0131n\u0131 sa\u011flar.<\/p>\n
    Hata Y\u00f6netimi<\/h4>\n
    Ger\u00e7ek d\u00fcnya uygulamalar\u0131nda, arka plan i\u015f par\u00e7ac\u0131klar\u0131nda olu\u015fabilecek hatalar\u0131 da y\u00f6netmek \u00f6nemlidir. napi_call_threadsafe_function<\/code> arac\u0131l\u0131\u011f\u0131yla hata mesajlar\u0131n\u0131 veya hata kodlar\u0131n\u0131 JavaScript'e ileterek, uygulaman\u0131n hata durumlar\u0131n\u0131 d\u00fczg\u00fcn bir \u015fekilde ele almas\u0131 sa\u011flanabilir.<\/p>\n
    Sonu\u00e7<\/h3>\n
    NAPI, Node.js ekosistemine y\u00fcksek performansl\u0131 C++ kodlar\u0131 entegre etmek i\u00e7in g\u00fc\u00e7l\u00fc bir ara\u00e7t\u0131r. Ancak, \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 ortam\u0131nda kullan\u0131ld\u0131\u011f\u0131nda, bellek y\u00f6netimi, veri senkronizasyonu ve JavaScript de\u011ferlerinin ya\u015fam d\u00f6ng\u00fcs\u00fc gibi konularda \u00f6zel dikkat ve \u00f6zen gerektirir. Yar\u0131\u015f ko\u015fullar\u0131, kilitlenmeler ve ge\u00e7ersiz bellek eri\u015fimi gibi sorunlar, uygulaman\u0131n kararl\u0131l\u0131\u011f\u0131n\u0131 ciddi \u015fekilde tehdit edebilir. Bu makalede ele al\u0131nan napi_create_threadsafe_function<\/code> kullan\u0131m\u0131, mutex'ler, atomik i\u015flemler ve dikkatli bellek y\u00f6netimi gibi en iyi uygulamalara ba\u011fl\u0131 kalarak, NAPI ile g\u00fcvenli, kararl\u0131 ve performansl\u0131 \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 eklentileri geli\u015ftirmek m\u00fcmk\u00fcnd\u00fcr. Unutulmamal\u0131d\u0131r ki, \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 programlamada hata ay\u0131klama karma\u015f\u0131k olabilir, bu nedenle kapsaml\u0131 test ve iyi bir g\u00fcnl\u00fckleme stratejisi hayati \u00f6nem ta\u015f\u0131r.<\/p>\n
    SSS (S\u0131k Sorulan Sorular)<\/h3>\n
    NAPI ile \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 ne zaman kullanmal\u0131y\u0131m?<\/h4>\n
    Yo\u011fun CPU hesaplamalar\u0131 (\u00f6rne\u011fin, g\u00f6r\u00fcnt\u00fc i\u015fleme, kriptografi, karma\u015f\u0131k algoritmalar) veya bloklay\u0131c\u0131 senkron I\/O i\u015flemleri (ancak genellikle I\/O i\u00e7in Node.js'in asenkron do\u011fas\u0131 yeterlidir) gerektiren durumlarda kullanmal\u0131s\u0131n\u0131z. Ama\u00e7, Node.js'in ana olay d\u00f6ng\u00fcs\u00fcn\u00fc bloke etmeden bu i\u015flemleri arka planda y\u00fcr\u00fctmektir.<\/p>\n
    napi_create_threadsafe_function<\/code> tam olarak ne i\u015fe yarar?<\/h4>\n
    napi_create_threadsafe_function<\/code>, bir JavaScript fonksiyonunu i\u015f par\u00e7ac\u0131\u011f\u0131 g\u00fcvenli hale getirir. Bu sayede, Node.js'in ana i\u015f par\u00e7ac\u0131\u011f\u0131 d\u0131\u015f\u0131nda \u00e7al\u0131\u015fan (C++ taraf\u0131nda olu\u015fturulan) i\u015f par\u00e7ac\u0131klar\u0131ndan bu JavaScript fonksiyonunu g\u00fcvenli bir \u015fekilde \u00e7a\u011f\u0131rabilirsiniz. JavaScript olay d\u00f6ng\u00fcs\u00fcn\u00fcn do\u011fru zamanda ve do\u011fru ba\u011flamda callback'i tetiklemesini sa\u011flar, b\u00f6ylece \u00e7\u00f6kme riskini ortadan kald\u0131r\u0131r.<\/p>\n
    NAPI de\u011ferlerini (napi_value<\/code>) do\u011frudan i\u015f par\u00e7ac\u0131klar\u0131 aras\u0131nda ge\u00e7irebilir miyim?<\/h4>\n
    Hay\u0131r, kesinlikle ge\u00e7irmemelisiniz. napi_value<\/code>'lar, V8 motorunun ana i\u015f par\u00e7ac\u0131\u011f\u0131na ba\u011fl\u0131d\u0131r ve di\u011fer i\u015f par\u00e7ac\u0131klar\u0131nda ge\u00e7erli de\u011fildir. Arka plan i\u015f par\u00e7ac\u0131klar\u0131ndan JavaScript'e veri iletmek i\u00e7in napi_create_threadsafe_function<\/code> ve onun callback mekanizmas\u0131n\u0131 kullanmal\u0131s\u0131n\u0131z.<\/p>\n
    \u00c7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 NAPI eklentilerinde bellek s\u0131z\u0131nt\u0131lar\u0131n\u0131 nas\u0131l \u00f6nleyebilirim?<\/h4>\n
    C++ taraf\u0131nda tahsis edilen t\u00fcm belle\u011fin (new<\/code> ile olu\u015fturulan nesneler, malloc<\/code> ile tahsis edilen bellek) uygun bir \u015fekilde serbest b\u0131rak\u0131ld\u0131\u011f\u0131ndan (delete<\/code>, free<\/code>) emin olun. Ak\u0131ll\u0131 i\u015faret\u00e7iler (std::unique_ptr<\/code>, std::shared_ptr<\/code>) kullanmak, bellek y\u00f6netimini otomatikle\u015ftirerek s\u0131z\u0131nt\u0131 riskini azaltabilir. Ayr\u0131ca Valgrind gibi ara\u00e7larla d\u00fczenli olarak bellek s\u0131z\u0131nt\u0131s\u0131 kontrol\u00fc yap\u0131n.<\/p>\n
    NAPI \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131 eklentisi kilitlenirse ne yapmal\u0131y\u0131m?<\/h4>\n
    \u0130lk ad\u0131m, bir hata ay\u0131klay\u0131c\u0131 (GDB\/LLDB) kullanarak \u00e7\u00f6kme an\u0131ndaki y\u0131\u011f\u0131n izini (stack trace) incelemektir. Bu, \u00e7\u00f6kmenin nerede meydana geldi\u011fini ve hangi i\u015f par\u00e7ac\u0131klar\u0131n\u0131n dahil oldu\u011funu g\u00f6sterecektir. Bellek hatalar\u0131ndan \u015f\u00fcpheleniyorsan\u0131z Valgrind kullan\u0131n. Kapsaml\u0131 g\u00fcnl\u00fckleme, olaylar\u0131n s\u0131ras\u0131n\u0131 anlaman\u0131za yard\u0131mc\u0131 olabilir. Kilitlenme (deadlock) durumlar\u0131nda, i\u015f par\u00e7ac\u0131klar\u0131n\u0131n kilit alma s\u0131ras\u0131n\u0131 ve bekleme durumlar\u0131n\u0131 kontrol edin.<\/p>\n","protected":false},"excerpt":{"rendered":"NAPI (Node-API), Node.js’in temel C++ API’sidir ve JavaScript ile C\/C++ kodlar\u0131 aras\u0131nda bir k\u00f6pr\u00fc g\u00f6revi g\u00f6r\u00fcr. Geli\u015ftiricilerin, performans kritik …","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-38226","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-genel","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\nNAPI \u00c7oklu \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 Ortam\u0131nda \u00c7\u00f6kme Sorunlar\u0131 ve G\u00fcvenli Geli\u015ftirme Yakla\u015f\u0131mlar\u0131 - Kodlar\u0131n Gizemli D\u00fcnyas\u0131<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/fatihsoysal.com\/blog\/napi-coklu-is-parcacigi-ortaminda-cokme-sorunlari-ve-guvenli-gelistirme-yaklasimlari\/\" \/>\n<meta property=\"og:locale\" content=\"tr_TR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"NAPI \u00c7oklu \u0130\u015f Par\u00e7ac\u0131\u011f\u0131 Ortam\u0131nda \u00c7\u00f6kme Sorunlar\u0131 ve G\u00fcvenli Geli\u015ftirme Yakla\u015f\u0131mlar\u0131\" \/>\n<meta property=\"og:description\" content=\"NAPI (Node-API), Node.js'in temel C++ API'sidir ve JavaScript ile C\/C++ kodlar\u0131 aras\u0131nda bir k\u00f6pr\u00fc g\u00f6revi g\u00f6r\u00fcr. 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