lib: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remov

lib: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

show more ...

Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Merge ^/head r340918 through r341763.

Use _thr_isthreaded() and _thr_setthreaded() wrappers

...instead of directly using the global variable.

MFC after: 2 weeks
Sponsored by: Dell EMC Isilon

Merge ^/head r325999 through r326131.

General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier f

General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

show more ...

Merge ^/head r318560 through r318657.

Remove old spinlock_debug code from libc

This no longer seems useful. Remove it.

This was prompted by a "cast discards volatile qualifier" warning
in libthr when WARNS=6.

Reviewed by: kib
MFC aft

Remove old spinlock_debug code from libc

This no longer seems useful. Remove it.

This was prompted by a "cast discards volatile qualifier" warning
in libthr when WARNS=6.

Reviewed by: kib
MFC after: 3 days
Sponsored by: Dell EMC
Differential Revision: https://reviews.freebsd.org/D10832

show more ...

MFH

Sponsored by: The FreeBSD Foundation

Use __FBSDID() for .c files from lib/libthr/thread.

Sponsored by: The FreeBSD Foundation

Merge sync of head

Merge from head

Merge r278538 through r279514.

MFH: r278593-r278966

Sponsored by: The FreeBSD Foundation

Merge ^/head r278499 through r278755.

Properly interpose libc spinlocks, was missed in r276630. In
particular, stdio locking was affected.

Reported and tested by: "Matthew D. Fuller" <fullermd@over-yonder.net>
Sponsored by: The FreeBSD

Properly interpose libc spinlocks, was missed in r276630. In
particular, stdio locking was affected.

Reported and tested by: "Matthew D. Fuller" <fullermd@over-yonder.net>
Sponsored by: The FreeBSD Foundation
MFC after: 3 days

show more ...

Avoid various shadowed variables. libthr is now almost WARNS=4 clean except
for some const dequalifiers that needs more careful investigation.

Ok'ed by: davidxu

Remove 3rd clause, renumber, ok per email

Replace internal usage of struct umtx with umutex which can supports
real-time if we want, no functionality is changed.

WARNS level 4 cleanup.

Increase the number of spinlocks, since libc's malloc implementation is
about to significantly increase the number of spinlocks used.

Approved by: markm (mentor)

Import my recent 1:1 threading working. some features improved includes:
1. fast simple type mutex.
2. __thread tls works.
3. asynchronous cancellation works ( using signal ).
4. thread synchroni

Import my recent 1:1 threading working. some features improved includes:
1. fast simple type mutex.
2. __thread tls works.
3. asynchronous cancellation works ( using signal ).
4. thread synchronization is fully based on umtx, mainly, condition
variable and other synchronization objects were rewritten by using
umtx directly. those objects can be shared between processes via
shared memory, it has to change ABI which does not happen yet.
5. default stack size is increased to 1M on 32 bits platform, 2M for
64 bits platform.
As the result, some mysql super-smack benchmarks show performance is
improved massivly.

Okayed by: jeff, mtm, rwatson, scottl

show more ...

Unconditionaly initialize any spin lock passed to pthread_spin_init(). While
makeing sure the spinlock isn't already in use might be a nice feature to
have in theory, it's hard to implement in practi

Unconditionaly initialize any spin lock passed to pthread_spin_init(). While
makeing sure the spinlock isn't already in use might be a nice feature to
have in theory, it's hard to implement in practice since the passed in
pointer may not be NULL, but still be an invalid value (i.e. 1..2..3.. etc).

show more ...

o Implement the pthread_spin_* functions in libthr.
o Man pages

Fix the wrapper function around signals so that a signal handling
thread on one of the mutex or condition variable queues is removed
from those queues before the real signal handler is called.