Chinaunix

标题: C11：NEW FEATURES [打印本页]

作者: KBTiller 时间: 2012-05-05 18:10
标题: C11：NEW FEATURES
本帖最后由 KBTiller 于 2012-05-05 21:47 编辑

(N1570)
— conditional (optional) features (including some that were previously mandatory)
— support for multiple threads of execution including an improved memory sequencing model, atomic objects, and thread-local storage (<stdatomic.h> and <threads.h>)
— additional floating-point characteristic macros (<float.h>)
— querying and specifying alignment of objects (<stdalign.h>, <stdlib.h>)
— Unicode characters and strings (<uchar.h>) (originally specified in ISO/IEC TR 19769:2004)
— type-generic expressions
— static assertions
— anonymous structures and unions
— no-return functions
— macros to create complex numbers (<complex.h>)
— support for opening files for exclusive access
— removed the gets function (<stdio.h>)
— added the aligned_alloc, at_quick_exit, and quick_exit functions (<stdlib.h>)
— (conditional) support for bounds-checking interfaces (originally specified in ISO/IEC TR 24731−1:2007)
— (conditional) support for analyzability

作者: KBTiller 时间: 2012-05-05 18:16
本帖最后由 KBTiller 于 2012-05-06 18:26 编辑

conditional features ：
atomic type ( <stdatomic.h> )
Atomic types are a conditional feature that implementations need not support; see 6.10.8.3.
Analyzability (Annex L)
bounds-checking interfaces (Annex K)
support for multiple threads of execution( <threads.h> )
IEC 60559 floating-point arithmetic(annex F)
IEC 60559 compatible complex arithmetic(annex G)

previously mandatory
C11：
(6.2.5)Complex types are a conditional feature that implementations need not support; see 6.10.8.3.
(6.7.6.2)
Variable length arrays are a conditional feature that implementations need not support; see 6.10.8.3.

C99：
(6.7.2)The type specifier _Complex shall not be used if the implementation does not provide complex types.
Freestanding implementations are not required to provide complex types.

作者: 幻の上帝 时间: 2012-05-05 20:32
N1750？……不是N1570？
WG14上官方文档最近才N1600多点。
2012-03 PostKona-2012 mailing N1598-N1613

作者: peijue 时间: 2012-05-05 20:43
nnd 最近项目用vc6做的标准什么的听听就好了

作者: KBTiller 时间: 2012-05-05 21:48
回复 3# 幻の上帝

笔误。多谢指正

作者: KBTiller 时间: 2012-05-06 18:22
回复 4# peijue

确实有这种现实的矛盾。大概就是这个原因，C11才有那么多conditional feature。

作者: KBTiller 时间: 2012-05-07 09:28
本帖最后由 KBTiller 于 2012-05-07 09:42 编辑

Contents：

6.2.8 Alignment of objects . . . . . . . . . . . . . . . . . 48
6.7.5 Alignment specifier . . . . . . . . . . . . . . . . . . 127
6.7.10 Static assertions . . . . . . . . . . . . . . . . . . . 145
7.15 Alignment <stdalign.h> . . . . . . . . . . . . . . . . . 268
7.17 Atomics <stdatomic.h> . . . . . . . . . . . . . . . . . . 273
7.17.1 Introduction . . . . . . . . . . . . . . . . . . . . . 273
7.17.2 Initialization . . . . . . . . . . . . . . . . . . . . 274
7.17.3 Order and consistency . . . . . . . . . . . . . . . . . 275
7.17.4 Fences . . . . . . . . . . . . . . . . . . . . . . . 278
7.17.5 Lock-free property . . . . . . . . . . . . . . . . . . 279
7.17.6 Atomic integer types . . . . . . . . . . . . . . . . . 280
7.17.7 Operations on atomic types . . . . . . . . . . . . . . . 282
7.17.8 Atomic flag type and operations . . . . . . . . . . . . . 285
7.23 _Noreturn <stdnoreturn.h> . . . . . . . . . . . . . . 361
7.26 Threads <threads.h> . . . . . . . . . . . . . . . . . . . 376
7.26.1 Introduction . . . . . . . . . . . . . . . . . . . . . 376
7.26.2 Initialization functions . . . . . . . . . . . . . . . . . 378
7.26.3 Condition variable functions . . . . . . . . . . . . . . 378
7.26.4 Mutex functions . . . . . . . . . . . . . . . . . . . 380
7.26.5 Thread functions . . . . . . . . . . . . . . . . . . . 383
7.26.6 Thread-specific storage functions . . . . . . . . . . . . 386
7.29.4.1 Wide string numeric conversion functions . . . . . 426
7.29.4.2 Wide string copying functions . . . . . . . . . . 430
7.29.4.3 Wide string concatenation functions . . . . . . . 432
7.29.4.4 Wide string comparison functions . . . . . . . . 433
7.29.4.5 Wide string search functions . . . . . . . . . . 435
7.29.4.6 Miscellaneous functions . . . . . . . . . . . . 439
7.29.6.1 Single-byte/wide character conversion functions . . . 441
7.29.6.2 Conversion state functions . . . . . . . . . . . 441
7.29.6.3 Restartable multibyte/wide character conversion
functions . . . . . . . . . . . . . . . . . . 442
7.29.6.4 Restartable multibyte/wide string conversion
functions . . . . . . . . . . . . . . . . . . 444
7.30.2.1 Wide character classification functions . . . . . . 448
7.30.2.2 Extensible wide character classification
functions . . . . . . . . . . . . . . . . . . 451
7.30.3.1 Wide character case mapping functions . . . . . . 453
7.30.3.2 Extensible wide character case mapping
functions . . . . . . . . . . . . . . . . . . 453
7.31.4 Floating-point environment <fenv.h> . . . . . . . . . . 455
7.31.8 Atomics <stdatomic.h> . . . . . . . . . . . . . . 455
7.31.14 Date and time <time.h> . . . . . . . . . . . . . . . 456
7.31.15 Threads <threads.h> . . . . . . . . . . . . . . . . 456
B.14 Alignment <stdalign.h> . . . . . . . . . . . . . . . . . 485
B.16 Atomics <stdatomic.h> . . . . . . . . . . . . . . . . . . 485
B.22 _Noreturn <stdnoreturn.h> . . . . . . . . . . . . . . 493
B.25 Threads <threads.h> . . . . . . . . . . . . . . . . . . . 495
B.27 Unicode utilities <uchar.h> . . . . . . . . . . . . . . . . . 497
D.1 Ranges of characters allowed . . . . . . . . . . . . . . . . . 504
D.2 Ranges of characters disallowed initially . . . . . . . . . . . . . 504
F.6 The return statement . . . . . . . . . . . . . . . . . . . . 511
F.10.1 Trigonometric functions . . . . . . . . . . . . . . . . 518
F.10.2 Hyperbolic functions . . . . . . . . . . . . . . . . . 520
F.10.3 Exponential and logarithmic functions . . . . . . . . . . 520
F.10.4 Power and absolute value functions . . . . . . . . . . . 524
F.10.5 Error and gamma functions . . . . . . . . . . . . . . . 525
F.10.6 Nearest integer functions . . . . . . . . . . . . . . . . 526
F.10.7 Remainder functions . . . . . . . . . . . . . . . . . 528
F.10.8 Manipulation functions . . . . . . . . . . . . . . . . 529
F.10.9 Maximum, minimum, and positive difference functions . . . 530
F.10.10 Floating multiply-add . . . . . . . . . . . . . . . . . 530
F.10.11 Comparison macros . . . . . . . . . . . . . . . . . . 531
G.4.1 Imaginary types . . . . . . . . . . . . . . . . . . . 533
G.4.2 Real and imaginary . . . . . . . . . . . . . . . . . . 533
G.4.3 Imaginary and complex . . . . . . . . . . . . . . . . 533
G.5.1 Multiplicative operators . . . . . . . . . . . . . . . . 534
G.5.2 Additive operators . . . . . . . . . . . . . . . . . . 537
G.6.1 Trigonometric functions . . . . . . . . . . . . . . . . 539
G.6.2 Hyperbolic functions . . . . . . . . . . . . . . . . . 539
G.6.3 Exponential and logarithmic functions . . . . . . . . . . 543
G.6.4 Power and absolute-value functions . . . . . . . . . . . 544
Annex K (normative) Bounds-checking interfaces . . . . . . . . . . . . . 582
K.1 Background . . . . . . . . . . . . . . . . . . . . . . . . 582
K.2 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . 583
K.3 Library . . . . . . . . . . . . . . . . . . . . . . . . . . 583
K.3.1 Introduction . . . . . . . . . . . . . . . . . . . . . 583
K.3.1.1 Standard headers . . . . . . . . . . . . . . . 583
K.3.1.2 Reserved identifiers . . . . . . . . . . . . . . 584
K.3.1.3 Use of errno . . . . . . . . . . . . . . . . . 584
K.3.1.4 Runtime-constraint violations . . . . . . . . . . 584
K.3.2 Errors <errno.h> . . . . . . . . . . . . . . . . . 585
K.3.3 Common definitions <stddef.h> . . . . . . . . . . . 585
K.3.4 Integer types <stdint.h> . . . . . . . . . . . . . . 585
K.3.5 Input/output <stdio.h> . . . . . . . . . . . . . . . 586
K.3.5.1 Operations on files . . . . . . . . . . . . . . 586
K.3.5.2 File access functions . . . . . . . . . . . . . . 588
K.3.5.3 Formatted input/output functions . . . . . . . . . 591
K.3.5.4 Character input/output functions . . . . . . . . . 602
K.3.6 General utilities <stdlib.h> . . . . . . . . . . . . . 604
K.3.6.1 Runtime-constraint handling . . . . . . . . . . 604
K.3.6.2 Communication with the environment . . . . . . . 606
K.3.6.3 Searching and sorting utilities . . . . . . . . . . 607
K.3.6.4 Multibyte/wide character conversion functions . . . 610
K.3.6.5 Multibyte/wide string conversion functions . . . . . 611
K.3.7 String handling <string.h> . . . . . . . . . . . . . 614
K.3.7.1 Copying functions . . . . . . . . . . . . . . 614
K.3.7.2 Concatenation functions . . . . . . . . . . . . 617
K.3.7.3 Search functions . . . . . . . . . . . . . . . 620
K.3.7.4 Miscellaneous functions . . . . . . . . . . . . 621
K.3.8 Date and time <time.h> . . . . . . . . . . . . . . . 624
K.3.8.1 Components of time . . . . . . . . . . . . . . 624
K.3.8.2 Time conversion functions . . . . . . . . . . . 624
K.3.9 Extended multibyte and wide character utilities
<wchar.h> . . . . . . . . . . . . . . . . . . . . 627
K.3.9.1 Formatted wide character input/output functions . . . 628
K.3.9.2 General wide string utilities . . . . . . . . . . . 639
K.3.9.3 Extended multibyte/wide character conversion
utilities . . . . . . . . . . . . . . . . . . . 647
Annex L (normative) Analyzability . . . . . . . . . . . . . . . . . . 652
L.1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . 652
L.2 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . 652
L.3 Requirements . . . . . . . . . . . . . . . . . . . . . . . . 653

作者: KBTiller 时间: 2012-05-08 18:28
3.14
memory location
either an object of scalar type, or a maximal sequence of adjacent bit-fields all having nonzero width

欢迎光临 Chinaunix (http://bbs.chinaunix.net/)