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Thread-Local Storage: Difference between revisions
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==[[C|C99]]== | |||
* ISO/IEC 9899:1999 is amended by [[gcc]] and others to introduce the <tt>__thread</tt> storage specifier (§6.2.4, §6.4.1, §6.7.1), and to add a vague definition of threads to the execution model (§5.1.2). | |||
===C++11=== | |||
* C++11 adds the <tt>thread_local</tt> keyword | |||
** Only constant initializers can be used for variables having __thread storage. | |||
==Windows== | ==Windows== | ||
* <tt>__declspec(thread)</tt> doesn't work in DLL's prior to Vista | * <tt>__declspec(thread)</tt> doesn't work in DLL's prior to Vista when loaded via LoadLibrary(). | ||
** The DLL must be linked into the binary before the binary's main image is loaded. | |||
==See Also== | ==See Also== | ||
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* Ulrich Drepper's paper, "[http://dev.gentoo.org/~dberkholz/articles/toolchain/tls.pdf ELF Handling for Thread-Local Storage]" | * Ulrich Drepper's paper, "[http://dev.gentoo.org/~dberkholz/articles/toolchain/tls.pdf ELF Handling for Thread-Local Storage]" | ||
* [[gcc]]'s Info entry for [http://gcc.gnu.org/onlinedocs/gcc/Thread_002dLocal.html#Thread_002dLocal TLS] | * [[gcc]]'s Info entry for [http://gcc.gnu.org/onlinedocs/gcc/Thread_002dLocal.html#Thread_002dLocal TLS] | ||
* "[http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1423.htm#TLS C and C++ Thread Compatibility]", ISO/IEC JTC1 SC22 WG14 N1423 (Lawrence Crowl) | |||
Latest revision as of 14:42, 6 September 2011
C99
- ISO/IEC 9899:1999 is amended by gcc and others to introduce the __thread storage specifier (§6.2.4, §6.4.1, §6.7.1), and to add a vague definition of threads to the execution model (§5.1.2).
C++11
- C++11 adds the thread_local keyword
- Only constant initializers can be used for variables having __thread storage.
Windows
- __declspec(thread) doesn't work in DLL's prior to Vista when loaded via LoadLibrary().
- The DLL must be linked into the binary before the binary's main image is loaded.
See Also
- pthreads
- Ulrich Drepper's paper, "ELF Handling for Thread-Local Storage"
- gcc's Info entry for TLS
- "C and C++ Thread Compatibility", ISO/IEC JTC1 SC22 WG14 N1423 (Lawrence Crowl)
