thread_local

< c‎ | thread
Defined in header <threads.h>
#define thread_local _Thread_local
 (since C11)
(removed in C23)

Convenience macro which can be used to specify that an object has thread-local storage duration.

Notes

Since C23, thread_local is itself a keyword, which may also be a predefined macro, so <threads.h> no longer provides it.

References

  • C17 standard (ISO/IEC 9899:2018):
  • 7.26.1/3 thread_local (p: 274)
  • C11 standard (ISO/IEC 9899:2011):
  • 7.26.1/3 thread_local (p: 376)

See also