[urcu.git] / LICENSE

Userspace RCU library licensing
Mathieu Desnoyers
May 15, 2012


* LGPLv2.1

The library part is distributed under LGPLv2.1 or later. See lgpl-2.1.txt for
details. This applies to :

urcu.h
urcu.c
urcu-static.h
arch_x86.h
arch_ppc.h

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 license applies to :

arch_atomic_x86.h
arch_atomic_ppc.h
arch_atomic_s390.h
arch_s390.h
compiler.h


* GPLv2

Library test code is distributed under the GPLv2 license. See gpl-2.0.txt for
details. This applies to :

urcutorture.h
urcutorture.c
api_x86.h
api_ppc.h
api_gcc.h
test_urcu.c
test_urcu_yield.c
test_rwlock_timing.c
urcu-asm.c

* 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	May 15, 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	details. This applies to :
	10
	11	urcu.h
	12	urcu.c
	13	urcu-static.h
	14	arch_x86.h
	15	arch_ppc.h
	16
	17	LGPL-compatible source code can statically use the library header using :
	18
	19	#define _LGPL_SOURCE
	20	#include <urcu.h>
	21
	22	Dynamic-only linking with the LGPL library is used if _LGPL_SOURCE is not
	23	defined. It permits relinking with newer versions of the library, which is
	24	required by the LGPL license.
	25
	26	See lgpl-relicensing.txt for details.
	27
	28
	29	* MIT-style license :
	30
	31	xchg() primitive has been rewritten from scratch starting from atomic_ops 1.2
	32	which has a MIT-style license that is intended to allow use in both free and
	33	proprietary software:
	34	http://www.hpl.hp.com/research/linux/atomic_ops/LICENSING.txt
	35	http://www.hpl.hp.com/personal/Hans_Boehm/gc/gc_source/
	36
	37	This license applies to :
	38
	39	arch_atomic_x86.h
	40	arch_atomic_ppc.h
	41	arch_atomic_s390.h
	42	arch_s390.h
	43	compiler.h
	44
	45
	46	* GPLv2
	47
	48	Library test code is distributed under the GPLv2 license. See gpl-2.0.txt for
	49	details. This applies to :
	50
	51	urcutorture.h
	52	urcutorture.c
	53	api_x86.h
	54	api_ppc.h
	55	api_gcc.h
	56	test_urcu.c
	57	test_urcu_yield.c
	58	test_rwlock_timing.c
	59	urcu-asm.c
	60
	61	* GPLv3 (or later)
	62
	63	The following build-related macro is under GPLv3 (or later):
	64
	65	m4/ax_tls.m4