[userspace-rcu.git] / LICENSE

Userspace RCU library licensing
Mathieu Desnoyers
September 3, 2012


* LGPLv2.1

The library part is distributed under LGPLv2.1 or later. See lgpl-2.1.txt for
license details. Refer to the individual file headers for details.

LGPL-compatible source code can statically use the library header using :

#define _LGPL_SOURCE
#include <urcu.h>

Dynamic-only linking with the LGPL library is used if _LGPL_SOURCE is not
defined. It permits relinking with newer versions of the library, which is
required by the LGPL license.

See lgpl-relicensing.txt for details.


* MIT-style license :

xchg() primitive has been rewritten from scratch starting from atomic_ops 1.2
which has a MIT-style license that is intended to allow use in both free and
proprietary software:
	http://www.hpl.hp.com/research/linux/atomic_ops/LICENSING.txt
	http://www.hpl.hp.com/personal/Hans_Boehm/gc/gc_source/

This MIT-style license (BSD like) apply to:

uatomic/gcc.h
uatomic/unknown.h
uatomic/generic.h
uatomic/sparc64.h
uatomic/arm.h
uatomic/ppc.h
uatomic/x86.h
uatomic.h

MIT/X11 (BSD like) license apply to:

compiler.h
arch/s390.h
uatomic/alpha.h
uatomic/mips.h
uatomic/nios2.h
uatomic/s390.h
system.h


* GPLv2

Library test code is distributed under the GPLv2 license. See gpl-2.0.txt for
license details. See headers of individual files under tests/ for details.


* GPLv3 (or later)

The following build-related macro is under GPLv3 (or later):

m4/ax_tls.m4
Commit	Line	Data
	1	Userspace RCU library licensing
	2	Mathieu Desnoyers
	3	September 3, 2012
	4
	5
	6	* LGPLv2.1
	7
	8	The library part is distributed under LGPLv2.1 or later. See lgpl-2.1.txt for
	9	license details. Refer to the individual file headers for details.
	10
	11	LGPL-compatible source code can statically use the library header using :
	12
	13	#define _LGPL_SOURCE
	14	#include <urcu.h>
	15
	16	Dynamic-only linking with the LGPL library is used if _LGPL_SOURCE is not
	17	defined. It permits relinking with newer versions of the library, which is
	18	required by the LGPL license.
	19
	20	See lgpl-relicensing.txt for details.
	21
	22
	23	* MIT-style license :
	24
	25	xchg() primitive has been rewritten from scratch starting from atomic_ops 1.2
	26	which has a MIT-style license that is intended to allow use in both free and
	27	proprietary software:
	28	http://www.hpl.hp.com/research/linux/atomic_ops/LICENSING.txt
	29	http://www.hpl.hp.com/personal/Hans_Boehm/gc/gc_source/
	30
	31	This MIT-style license (BSD like) apply to:
	32
	33	uatomic/gcc.h
	34	uatomic/unknown.h
	35	uatomic/generic.h
	36	uatomic/sparc64.h
	37	uatomic/arm.h
	38	uatomic/ppc.h
	39	uatomic/x86.h
	40	uatomic.h
	41
	42	MIT/X11 (BSD like) license apply to:
	43
	44	compiler.h
	45	arch/s390.h
	46	uatomic/alpha.h
	47	uatomic/mips.h
	48	uatomic/nios2.h
	49	uatomic/s390.h
	50	system.h
	51
	52
	53	* GPLv2
	54
	55	Library test code is distributed under the GPLv2 license. See gpl-2.0.txt for
	56	license details. See headers of individual files under tests/ for details.
	57
	58
	59	* GPLv3 (or later)
	60
	61	The following build-related macro is under GPLv3 (or later):
	62
	63	m4/ax_tls.m4