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musl - an implementation of the standard library for Linux-based systems

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Rich Felker 2d0bbe6c78 fix pthread_cond_wait paired with with priority-inheritance mutex pthread_cond_wait arranged for requeued waiters to wake when the mutex is unlocked by temporarily adjusting the mutex's waiter count. commit `54ca677983` broke this when introducing PI mutexes by repurposing the waiter count field of the mutex structure. since then, for PI mutexes, the waiter count adjustment was misinterpreted by the mutex locking code as indicating that the mutex is non a non-recoverable state. it would be possible to special-case PI mutexes here, but instead just drop all adjustment of the waiters count, and instead use the lock word waiters bit for all mutex types. since the mutex is either held by the caller or in unrecoverable state at the time the bit is set, it will necessarily still be set at the time of any subsequent valid unlock operation, and this will produce the desired effect of waking the next waiter. if waiter counts are entirely dropped at some point in the future this code should still work without modification.		2020-10-26 15:56:25 -04:00
arch	bits/syscall.h: add __NR_faccessat2 from linux v5.8	2020-09-09 17:21:03 -04:00
compat/time32	fix null pointer dereference in setitimer time32 compat shim	2019-12-08 10:35:04 -05:00
crt	remove unnecessary and problematic _Noreturn from crt/ldso startup	2019-06-25 19:05:40 -04:00
dist	add another example option to dist/config.mak	2012-04-24 16:49:11 -04:00
include	implement _Fork and refactor fork using it	2020-10-14 20:27:12 -04:00
ldso	ldso: use pthread_t rather than kernel tid to track ctor visitor	2020-10-14 20:27:12 -04:00
src	fix pthread_cond_wait paired with with priority-inheritance mutex	2020-10-26 15:56:25 -04:00
tools	fix incorrect escaping in add-cfi.*.awk scripts	2020-01-20 15:57:29 -05:00
.gitignore	remove obsolete gitignore rules	2016-07-06 00:21:25 -04:00
.mailmap	update contributor name	2019-12-07 12:21:35 -05:00
configure	configure: enable warnings by default	2020-08-27 20:43:47 -04:00
COPYRIGHT	add optimized aarch64 memcpy and memset	2020-06-26 17:49:51 -04:00
dynamic.list	fix regression in access to optopt object	2018-11-19 13:20:41 -05:00
INSTALL	document mips r6 in INSTALL file	2019-09-27 00:22:48 -04:00
Makefile	make mallocng the default malloc implementation	2020-06-30 15:38:27 -04:00
README	update version reference in the README file	2014-06-25 14:16:53 -04:00
VERSION	release 1.2.1	2020-08-04 00:21:09 -04:00
WHATSNEW	release 1.2.1	2020-08-04 00:21:09 -04:00

README

    musl libc

musl, pronounced like the word "mussel", is an MIT-licensed
implementation of the standard C library targetting the Linux syscall
API, suitable for use in a wide range of deployment environments. musl
offers efficient static and dynamic linking support, lightweight code
and low runtime overhead, strong fail-safe guarantees under correct
usage, and correctness in the sense of standards conformance and
safety. musl is built on the principle that these goals are best
achieved through simple code that is easy to understand and maintain.

The 1.1 release series for musl features coverage for all interfaces
defined in ISO C99 and POSIX 2008 base, along with a number of
non-standardized interfaces for compatibility with Linux, BSD, and
glibc functionality.

For basic installation instructions, see the included INSTALL file.
Information on full musl-targeted compiler toolchains, system
bootstrapping, and Linux distributions built on musl can be found on
the project website:

    http://www.musl-libc.org/