mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-29 16:21:07 +00:00
ce7528f637
This patch adds the thrd_* definitions from C11 threads (ISO/IEC 9899:2011),
more specifically thrd_create, thrd_curent, rhd_detach, thrd_equal,
thrd_exit, thrd_join, thrd_sleep, thrd_yield, and required types.
Mostly of the definitions are composed based on POSIX conterparts, such as
thrd_t (using pthread_t). For thrd_* function internally direct
POSIX pthread call are used with the exceptions:
1. thrd_start uses pthread_create internal implementation, but changes
how to actually calls the start routine. This is due the difference
in signature between POSIX and C11, where former return a 'void *'
and latter 'int'.
To avoid calling convention issues due 'void *' to int cast, routines
from C11 threads are started slight different than default pthread one.
Explicit cast to expected return are used internally on pthread_create
and the result is stored back to void also with an explicit cast.
2. thrd_sleep uses nanosleep internal direct syscall to avoid clobbering
errno and to handle expected standard return codes. It is a
cancellation entrypoint to be consistent with both thrd_join and
cnd_{timed}wait.
3. thrd_yield also uses internal direct syscall to avoid errno clobbering.
Checked with a build for all major ABI (aarch64-linux-gnu, alpha-linux-gnu,
arm-linux-gnueabi, i386-linux-gnu, ia64-linux-gnu, m68k-linux-gnu,
microblaze-linux-gnu [1], mips{64}-linux-gnu, nios2-linux-gnu,
powerpc{64le}-linux-gnu, s390{x}-linux-gnu, sparc{64}-linux-gnu,
and x86_64-linux-gnu).
Also ran a full check on aarch64-linux-gnu, x86_64-linux-gnu, i686-linux-gnu,
arm-linux-gnueabhf, and powerpc64le-linux-gnu.
[BZ #14092]
* conform/Makefile (conformtest-headers-ISO11): Add threads.h.
(linknamespace-libs-ISO11): Add libpthread.a.
* conform/data/threads.h-data: New file: add C11 thrd_* types and
functions.
* include/stdc-predef.h (__STDC_NO_THREADS__): Remove definition.
* nptl/Makefile (headers): Add threads.h.
(libpthread-routines): Add new C11 thread thrd_create, thrd_current,
thrd_detach, thrd_equal, thrd_exit, thrd_join, thrd_sleep, and
thrd_yield.
* nptl/Versions (libpthread) [GLIBC_2.28]): Add new C11 thread
thrd_create, thrd_current, thrd_detach, thrd_equal, thrd_exit,
thrd_join, thrd_sleep, and thrd_yield symbols.
* nptl/descr.h (struct pthread): Add c11 field.
* nptl/pthreadP.h (ATTR_C11_THREAD): New define.
* nptl/pthread_create.c (START_THREAD_DEFN): Call C11 thread start
routine with expected function prototype.
(__pthread_create_2_1): Add C11 threads check based on attribute
value.
* sysdeps/unix/sysdep.h (INTERNAL_SYSCALL_CANCEL): New macro.
* nptl/thrd_create.c: New file.
* nptl/thrd_current.c: Likewise.
* nptl/thrd_detach.c: Likewise.
* nptl/thrd_equal.c: Likewise.
* nptl/thrd_exit.c: Likewise.
* nptl/thrd_join.c: Likewise.
* nptl/thrd_priv.h: Likewise.
* nptl/thrd_sleep.c: Likewise.
* nptl/thrd_yield.c: Likewise.
* include/threads.h: Likewise.
61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
/* Copyright (C) 1991-2018 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _STDC_PREDEF_H
|
|
#define _STDC_PREDEF_H 1
|
|
|
|
/* This header is separate from features.h so that the compiler can
|
|
include it implicitly at the start of every compilation. It must
|
|
not itself include <features.h> or any other header that includes
|
|
<features.h> because the implicit include comes before any feature
|
|
test macros that may be defined in a source file before it first
|
|
explicitly includes a system header. GCC knows the name of this
|
|
header in order to preinclude it. */
|
|
|
|
/* glibc's intent is to support the IEC 559 math functionality, real
|
|
and complex. If the GCC (4.9 and later) predefined macros
|
|
specifying compiler intent are available, use them to determine
|
|
whether the overall intent is to support these features; otherwise,
|
|
presume an older compiler has intent to support these features and
|
|
define these macros by default. */
|
|
|
|
#ifdef __GCC_IEC_559
|
|
# if __GCC_IEC_559 > 0
|
|
# define __STDC_IEC_559__ 1
|
|
# endif
|
|
#else
|
|
# define __STDC_IEC_559__ 1
|
|
#endif
|
|
|
|
#ifdef __GCC_IEC_559_COMPLEX
|
|
# if __GCC_IEC_559_COMPLEX > 0
|
|
# define __STDC_IEC_559_COMPLEX__ 1
|
|
# endif
|
|
#else
|
|
# define __STDC_IEC_559_COMPLEX__ 1
|
|
#endif
|
|
|
|
/* wchar_t uses Unicode 10.0.0. Version 10.0 of the Unicode Standard is
|
|
synchronized with ISO/IEC 10646:2017, fifth edition, plus
|
|
the following additions from Amendment 1 to the fifth edition:
|
|
- 56 emoji characters
|
|
- 285 hentaigana
|
|
- 3 additional Zanabazar Square characters */
|
|
#define __STDC_ISO_10646__ 201706L
|
|
|
|
#endif
|