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C1X is the unofficial name of the planned new standard for the C programming language. It is intended to replace the existing C standard. This predecessor is informally known as C99. The standard is not yet finalized. The most recent working draft, N1425, was published in November 2009.
The November 2009 draft includes several changes to the C99 language and library specifications, such as:
Alignment specification (_Align specifier, alignof operator, aligned_alloc function)
Multithreading support (_Thread_local storage-class specifier, <threads.h> header including thread creation/management functions, mutex, condition variable and thread-specific storage functionality)
Improved Unicode support (char16_t and char32_t types for storing UTF-16/UTF-32 encoded data, including the corresponding u and U string literal prefixes and conversion functions in <uchar.h>)
Removal of the gets function
Bounds-checking interfaces (Annex K)
Analyzability features (Annex L)
Some[who?] are critical about the addition of multithreading to the C programming language. Many[who?] may argue that thread locking isn't necessary and shouldn't be encouraged. The type names proposed (cnd_t, thrd_t, tss_t, mtx_t, tss_dtor_t) may also be considered inappropriately obscure by some.
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