RAIIã‚‚ã©ã in C __attribute__((cleanup(fn)))gccã®__attribute__((cleanup(fn))) ãŒä¾¿åˆ©ã™ãŽã‚‹ä»¶ã«ã¤ã„ã¦ã€‚ C++ã§ã‚³ãƒ¼ãƒ‰ã‚’書ãã¨ãã¯ã€RAIIã¨ã‹å‘¼ã°ã‚Œã¦ã„るイディオムを使ãˆã°ã€ã”å˜ã˜ã®é€šã‚Šã€ãƒãƒƒã‚¯ã—ãŸmutexを手動ã§é–‹æ”¾ã™ã‚‹å¿…è¦ã‚‚ãªã„ã§ã™ã—ã€newã—ãŸã‚ªãƒ–ジェクトを手動ã§deleteã™ã‚‹å¿…è¦ã‚‚ãªã„ã§ã™ã€‚ void Baz::boo() const { boost::mutex::scoped_lock lock(mutex); // ... return; // lock変数ã®ãƒ‡ã‚¹ãƒˆãƒ©ã‚¯ã‚¿ã§è‡ªå‹•é–‹æ”¾ã€‚手動ã§ã®é–‹æ”¾ä¸è¦ }ã§ã‚‚C言語ã ã¨ã€å½“然ãªãŒã‚‰æ‰‹å‹•ã§é–‹æ”¾ã—ãªã„ã¨ã„ã‘ã¾ã›ã‚“。複数箇所ã§returnã—ã¦ã„ã‚‹å ´åˆãªã©ã€ã‚¿ã‚¤ãƒ—ãŒé¢å€’è‡ã™ãŽã€‚ int foo() { pthread_mutex_lock(&mutex); // ... if (hogehoge) { pthread_mutex_unlock
GCC 解èªå®¤ Wiki*
GCC some extensions
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