Re: [ptxdist] [PATCH] Add the userspace RCU library

[Michael Olbrich <m.olbrich@pengutronix.de>]

On Sun, Dec 25, 2011 at 08:33:20PM +0100, Juergen Beisert wrote:
> >From its README:
> This data synchronization library provides read-side access which scales
> linearly with the number of cores. It does so by allowing multiples copies
> of a given data structure to live at the same time, and by monitoring the data
> structure accesses to detect grace periods after which memory reclamation is
> possible.
>     
> Supported architectures are: x86, PPC and ARM.
>     
> Signed-off-by: Juergen Beisert <jbe@pengutronix.de>
> 
> diff --git a/rules/userspace-rcu.in b/rules/userspace-rcu.in
> new file mode 100644
> index 0000000..26bcdba
> --- /dev/null
> +++ b/rules/userspace-rcu.in
> @@ -0,0 +1,25 @@
> +## SECTION=system_libraries
> +
> +menuconfig USERSPACE_RCU
> +	tristate
> +	prompt "libuserspace-rcu              "
> +	select GLIBC_PTHREAD
> +	help
> +	  liburcu is a LGPLv2.1 userspace RCU (read-copy-update) library. This
> +	  data synchronization library provides read-side access which scales
> +	  linearly with the number of cores. It does so by allowing multiples
> +	  copies of a given data structure to live at the same time, and by
> +	  monitoring the data structure accesses to detect grace periods after
> +	  which memory reclamation is possible.
> +
> +if USERSPACE_RCU
> +
> +config USERSPACE_RCU_SMP
> +	bool
> +	prompt "SMP support"
> +	default y
> +	help
> +	  Provide SMP support. Warning: Disable this only on real uniprocessor
> +	  systems.
> +
> +endif
> diff --git a/rules/userspace-rcu.make b/rules/userspace-rcu.make
> new file mode 100644
> index 0000000..d896aa6
> --- /dev/null
> +++ b/rules/userspace-rcu.make
> @@ -0,0 +1,73 @@
> +# -*-makefile-*-
> +#
> +# Copyright (C) 2011 by Juergen Beisert <jbe@pengutronix.de>
> +#
> +# See CREDITS for details about who has contributed to this project.
> +#
> +# For further information about the PTXdist project and license conditions
> +# see the README file.
> +#
> +
> +#
> +# We provide this package
> +#
> +PACKAGES-$(PTXCONF_USERSPACE_RCU) += userspace-rcu
> +
> +#
> +# Paths and names
> +#
> +USERSPACE_RCU_VERSION	:= 0.6.7
> +USERSPACE_RCU_MD5	:= 2705dadd65beda8e8960472c082e44b3
> +USERSPACE_RCU		:= userspace-rcu-$(USERSPACE_RCU_VERSION)
> +USERSPACE_RCU_SUFFIX	:= tar.bz2
> +USERSPACE_RCU_URL	:= http://lttng.org/files/urcu/$(USERSPACE_RCU).$(USERSPACE_RCU_SUFFIX)
> +USERSPACE_RCU_SOURCE	:= $(SRCDIR)/$(USERSPACE_RCU).$(USERSPACE_RCU_SUFFIX)
> +USERSPACE_RCU_DIR	:= $(BUILDDIR)/$(USERSPACE_RCU)
> +USERSPACE_RCU_LICENSE	:= LGPLv2.1
> +
> +# ----------------------------------------------------------------------------
> +# Prepare
> +# ----------------------------------------------------------------------------
> +
> +#
> +# autoconf
> +#
> +USERSPACE_RCU_CONF_TOOL	:= autoconf
> +USERSPACE_RCU_CONF_OPT	:= 

break

	$(CROSS_AUTOCONF_USR) \
> +	--enable-silent-rules \
> +	--disable-dependency-tracking \

remove

> +	--enable-shared \
> +	--disable-static
> +
> +ifdef PTXCONF_USERSPACE_RCU_SMP
> +USERSPACE_RCU_CONF_OPT	+= --enable-smp-support
> +else
> +USERSPACE_RCU_CONF_OPT	+= --disable-smp-support
> +endif

ptx/endis

> +
> +# ----------------------------------------------------------------------------
> +# Target-Install
> +# ----------------------------------------------------------------------------
> +
> +$(STATEDIR)/userspace-rcu.targetinstall:
> +	@$(call targetinfo)
> +
> +	@$(call install_init, userspace-rcu)
> +	@$(call install_fixup, userspace-rcu,PRIORITY,optional)
> +	@$(call install_fixup, userspace-rcu,SECTION,base)
> +	@$(call install_fixup, userspace-rcu,AUTHOR,"Juergen Beisert <jbe@pengutronix.de>")
> +	@$(call install_fixup, userspace-rcu,DESCRIPTION,"Userspace RCU")
> +
> +	@$(call install_lib, userspace-rcu, 0, 0, 0644, liburcu)
> +	@$(call install_lib, userspace-rcu, 0, 0, 0644, liburcu-bp)
> +	@$(call install_lib, userspace-rcu, 0, 0, 0644, liburcu-cds)
> +	@$(call install_lib, userspace-rcu, 0, 0, 0644, liburcu-common)
> +	@$(call install_lib, userspace-rcu, 0, 0, 0644, liburcu-mb)
> +	@$(call install_lib, userspace-rcu, 0, 0, 0644, liburcu-qsbr)
> +	@$(call install_lib, userspace-rcu, 0, 0, 0644, liburcu-signal)
> +
> +	@$(call install_finish, userspace-rcu)
> +
> +	@$(call touch)
> +
> +# vim: syntax=make
> 
> -- 
> Pengutronix e.K.                              | Juergen Beisert             |
> Linux Solutions for Science and Industry      | http://www.pengutronix.de/  |
> 
> -- 
> ptxdist mailing list
> ptxdist@pengutronix.de
> 

-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

-- 
ptxdist mailing list
ptxdist@pengutronix.de