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freebsd-skq/include/Makefile
David Xu 9b0f1823b5 Use umtx to implement process sharable semaphore, to make this work, 
now type sema_t is a structure which can be put in a shared memory area,
and multiple processes can operate it concurrently.
User can either use mmap(MAP_SHARED) + sem_init(pshared=1) or use sem_open()
to initialize a shared semaphore.
Named semaphore uses file system and is located in /tmp directory, and its
file name is prefixed with 'SEMD', so now it is chroot or jail friendly.
In simplist cases, both for named and un-named semaphore, userland code
does not have to enter kernel to reduce/increase semaphore's count.
The semaphore is designed to be crash-safe, it means even if an application
is crashed in the middle of operating semaphore, the semaphore state is
still safely recovered by later use, there is no waiter counter maintained
by userland code.
The main semaphore code is in libc and libthr only has some necessary stubs,
this makes it possible that a non-threaded application can use semaphore
without linking to thread library.
Old semaphore implementation is kept libc to maintain binary compatibility.
The kernel ksem API is no longer used in the new implemenation.

Discussed on: threads@
2010-01-05 02:37:59 +00:00

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Makefile
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# @(#)Makefile 8.2 (Berkeley) 1/4/94
# $FreeBSD$
#
# Doing a "make install" builds /usr/include.
.include <bsd.own.mk>
CLEANFILES= osreldate.h version vers.c
SUBDIR= arpa gssapi protocols rpcsvc rpc
INCS= a.out.h ar.h assert.h bitstring.h complex.h cpio.h _ctype.h ctype.h \
db.h \
dirent.h dlfcn.h elf.h elf-hints.h err.h fmtmsg.h fnmatch.h fstab.h \
fts.h ftw.h getopt.h glob.h grp.h gssapi.h \
histedit.h ieeefp.h ifaddrs.h \
inttypes.h iso646.h kenv.h langinfo.h libgen.h limits.h link.h \
locale.h malloc.h malloc_np.h memory.h monetary.h mpool.h mqueue.h \
ndbm.h netconfig.h \
netdb.h nl_types.h nlist.h nss.h nsswitch.h paths.h \
printf.h proc_service.h pthread.h \
pthread_np.h pwd.h ranlib.h readpassphrase.h regex.h regexp.h \
res_update.h resolv.h runetype.h search.h semaphore.h setjmp.h \
signal.h spawn.h stab.h \
stdbool.h stddef.h stdio.h stdlib.h string.h stringlist.h \
strings.h sysexits.h tar.h termios.h tgmath.h \
time.h timeconv.h timers.h ttyent.h \
ulimit.h unistd.h utime.h utmp.h uuid.h varargs.h vis.h wchar.h \
wctype.h wordexp.h
MHDRS= float.h floatingpoint.h stdarg.h
PHDRS= sched.h _semaphore.h
LHDRS= aio.h errno.h fcntl.h linker_set.h poll.h stdint.h syslog.h \
ucontext.h
LDIRS= bsm cam geom net net80211 netatalk netgraph netinet netinet6 \
netipsec ${_netipx} netnatm ${_netncp} netsmb \
nfs nfsclient nfsserver \
sys vm
LSUBDIRS= cam/ata cam/scsi \
dev/acpica dev/an dev/bktr dev/firewire dev/hwpmc \
dev/ic dev/iicbus ${_dev_ieee488} dev/lmc dev/mfi dev/ofw \
dev/pbio ${_dev_powermac_nvram} dev/ppbus dev/smbus \
dev/speaker dev/usb dev/utopia dev/vkbd dev/wi \
fs/devfs fs/fdescfs fs/fifofs fs/msdosfs fs/nfs fs/ntfs fs/nullfs \
${_fs_nwfs} fs/portalfs fs/procfs fs/smbfs fs/udf fs/unionfs \
geom/cache geom/concat geom/eli geom/gate geom/journal geom/label \
geom/mirror geom/multipath geom/nop \
geom/raid3 geom/shsec geom/stripe geom/virstor \
netgraph/atm netgraph/netflow \
security/audit \
security/mac_biba security/mac_bsdextended security/mac_lomac \
security/mac_mls security/mac_partition \
ufs/ffs ufs/ufs
LSUBSUBDIRS= dev/mpt/mpilib
.if ${MACHINE_ARCH} == "powerpc"
_dev_powermac_nvram= dev/powermac_nvram
.endif
.if ${MK_GPIB} != "no"
_dev_ieee488= dev/ieee488
.endif
.if ${MK_HESIOD} != "no"
INCS+= hesiod.h
.endif
.if ${MK_BLUETOOTH} != "no"
LSUBSUBDIRS+= netgraph/bluetooth/include
.endif
# XXX unconditionally needed by <netsmb/netbios.h>
#.if ${MK_IPX} != "no"
_netipx= netipx
#.endif
.if ${MK_NCP} != "no"
_netncp= netncp
_fs_nwfs= fs/nwfs
.endif
# Define SHARED to indicate whether you want symbolic links to the system
# source (``symlinks''), or a separate copy (``copies''). ``symlinks'' is
# probably only useful for developers and should be avoided if you do not
# wish to tie your /usr/include and /usr/src together.
#SHARED= symlinks
SHARED?= copies
INCS+= osreldate.h
osreldate.h: ${.CURDIR}/../sys/conf/newvers.sh ${.CURDIR}/../sys/sys/param.h \
${.CURDIR}/Makefile
@${ECHO} creating osreldate.h from newvers.sh
@MAKE=${MAKE}; \
PARAMFILE=${.CURDIR}/../sys/sys/param.h; \
. ${.CURDIR}/../sys/conf/newvers.sh; \
echo "$$COPYRIGHT" > osreldate.h; \
echo "#ifdef _KERNEL" >> osreldate.h; \
echo "#error \"<osreldate.h> cannot be used in the kernel, use <sys/param.h>\"" >> osreldate.h; \
echo "#else" >> osreldate.h; \
echo "#undef __FreeBSD_version" >> osreldate.h; \
echo "#define __FreeBSD_version $$RELDATE" >> osreldate.h; \
echo "#endif" >> osreldate.h
.for i in ${LHDRS}
INCSLINKS+= sys/$i ${INCLUDEDIR}/$i
.endfor
.for i in ${MHDRS}
INCSLINKS+= machine/$i ${INCLUDEDIR}/$i
.endfor
.for i in ${PHDRS}
INCSLINKS+= sys/$i ${INCLUDEDIR}/$i
.endfor
.if ${MACHINE} != ${MACHINE_ARCH}
_MARCH=${MACHINE_ARCH}
.endif
.include <bsd.prog.mk>
installincludes: ${SHARED}
${SHARED}: compat
# Take care of stale directory-level symlinks.
compat:
.for i in ${LDIRS} ${LSUBDIRS} machine ${_MARCH} crypto
if [ -L ${DESTDIR}${INCLUDEDIR}/$i ]; then \
rm -f ${DESTDIR}${INCLUDEDIR}/$i; \
fi
.endfor
mtree -deU ${MTREE_FOLLOWS_SYMLINKS} \
-f ${.CURDIR}/../etc/mtree/BSD.include.dist \
-p ${DESTDIR}${INCLUDEDIR}
.if ${MK_BIND_LIBS} != "no"
mtree -deU ${MTREE_FOLLOWS_SYMLINKS} \
-f ${.CURDIR}/../etc/mtree/BIND.include.dist \
-p ${DESTDIR}${INCLUDEDIR}
.endif
copies:
.for i in ${LDIRS} ${LSUBDIRS} ${LSUBSUBDIRS} altq crypto machine machine/pc \
${_MARCH}
.if exists(${DESTDIR}${INCLUDEDIR}/$i)
cd ${DESTDIR}${INCLUDEDIR}/$i; \
for h in *.h; do \
if [ -L $$h ]; then rm -f $$h; fi; \
done
.endif
.endfor
.for i in ${LDIRS} ${LSUBDIRS:Ndev/acpica:Ndev/bktr} ${LSUBSUBDIRS}
cd ${.CURDIR}/../sys; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 $i/*.h \
${DESTDIR}${INCLUDEDIR}/$i
.endfor
cd ${.CURDIR}/../sys/dev/acpica; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 acpiio.h \
${DESTDIR}${INCLUDEDIR}/dev/acpica
cd ${.CURDIR}/../sys/dev/bktr; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 ioctl_*.h \
${DESTDIR}${INCLUDEDIR}/dev/bktr
cd ${.CURDIR}/../sys/contrib/altq/altq; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 *.h \
${DESTDIR}${INCLUDEDIR}/altq
cd ${.CURDIR}/../sys/fs/cd9660/; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 *.h \
${DESTDIR}${INCLUDEDIR}/isofs/cd9660
.if ${MK_IPFILTER} != "no"
cd ${.CURDIR}/../sys/contrib/ipfilter/netinet; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 *.h \
${DESTDIR}${INCLUDEDIR}/netinet
.endif
cd ${.CURDIR}/../sys/contrib/pf/net; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 *.h \
${DESTDIR}${INCLUDEDIR}/net
cd ${.CURDIR}/../sys/crypto; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 rijndael/rijndael.h \
${DESTDIR}${INCLUDEDIR}/crypto
cd ${.CURDIR}/../sys/opencrypto; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 *.h \
${DESTDIR}${INCLUDEDIR}/crypto
cd ${.CURDIR}/../sys/${MACHINE}/include; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 *.h \
${DESTDIR}${INCLUDEDIR}/machine
.if exists(${.CURDIR}/../sys/${MACHINE}/include/pc)
cd ${.CURDIR}/../sys/${MACHINE}/include/pc; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 *.h \
${DESTDIR}${INCLUDEDIR}/machine/pc
.endif
.if defined(_MARCH)
${INSTALL} -d -o ${BINOWN} -g ${BINGRP} -m 755 \
${DESTDIR}${INCLUDEDIR}/${_MARCH}; \
cd ${.CURDIR}/../sys/${_MARCH}/include; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 *.h \
${DESTDIR}${INCLUDEDIR}/${_MARCH}
.if exists(${.CURDIR}/../sys/${_MARCH}/include/pc)
${INSTALL} -d -o ${BINOWN} -g ${BINGRP} -m 755 \
${DESTDIR}${INCLUDEDIR}/${_MARCH}/pc; \
cd ${.CURDIR}/../sys/${_MARCH}/include/pc; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 *.h \
${DESTDIR}${INCLUDEDIR}/${_MARCH}/pc
.endif
.endif
cd ${.CURDIR}/../sys/rpc; \
${INSTALL} -C -o ${BINOWN} -g ${BINGRP} -m 444 types.h \
${DESTDIR}${INCLUDEDIR}/rpc
symlinks:
@${ECHO} "Setting up symlinks to kernel source tree..."
.for i in ${LDIRS}
cd ${.CURDIR}/../sys/$i; \
for h in *.h; do \
ln -fs ../../../sys/$i/$$h ${DESTDIR}${INCLUDEDIR}/$i; \
done
.endfor
.for i in ${LSUBDIRS:Ndev/acpica:Ndev/bktr}
cd ${.CURDIR}/../sys/$i; \
for h in *.h; do \
ln -fs ../../../../sys/$i/$$h ${DESTDIR}${INCLUDEDIR}/$i; \
done
.endfor
cd ${.CURDIR}/../sys/dev/acpica; \
for h in acpiio.h; do \
ln -fs ../../../../sys/dev/acpica/$$h \
${DESTDIR}${INCLUDEDIR}/dev/acpica; \
done
cd ${.CURDIR}/../sys/dev/bktr; \
for h in ioctl_*.h; do \
ln -fs ../../../../sys/dev/bktr/$$h \
${DESTDIR}${INCLUDEDIR}/dev/bktr; \
done
.for i in ${LSUBSUBDIRS}
cd ${.CURDIR}/../sys/$i; \
for h in *.h; do \
ln -fs ../../../../../sys/$i/$$h ${DESTDIR}${INCLUDEDIR}/$i; \
done
.endfor
cd ${.CURDIR}/../sys/contrib/altq/altq; \
for h in *.h; do \
ln -fs ../../../sys/contrib/altq/altq/$$h \
${DESTDIR}${INCLUDEDIR}/altq; \
done
.if ${MK_IPFILTER} != "no"
cd ${.CURDIR}/../sys/contrib/ipfilter/netinet; \
for h in *.h; do \
ln -fs ../../../sys/contrib/ipfilter/netinet/$$h \
${DESTDIR}${INCLUDEDIR}/netinet; \
done
.endif
cd ${.CURDIR}/../sys/contrib/pf/net; \
for h in *.h; do \
ln -fs ../../../sys/contrib/pf/net/$$h \
${DESTDIR}${INCLUDEDIR}/net; \
done
cd ${.CURDIR}/../sys/crypto; \
for h in rijndael/rijndael.h; do \
ln -fs ../../../sys/crypto/$$h \
${DESTDIR}${INCLUDEDIR}/crypto; \
done
cd ${.CURDIR}/../sys/opencrypto; \
for h in *.h; do \
ln -fs ../../../sys/opencrypto/$$h \
${DESTDIR}${INCLUDEDIR}/crypto; \
done
cd ${.CURDIR}/../sys/${MACHINE}/include; \
for h in *.h; do \
ln -fs ../../../sys/${MACHINE}/include/$$h \
${DESTDIR}${INCLUDEDIR}/machine; \
done
.if exists(${.CURDIR}/../sys/${MACHINE}/include/pc)
cd ${.CURDIR}/../sys/${MACHINE}/include/pc; \
for h in *.h; do \
ln -fs ../../../../sys/${MACHINE}/include/pc/$$h \
${DESTDIR}${INCLUDEDIR}/machine/pc; \
done
.endif
.if defined(_MARCH)
${INSTALL} -d -o ${BINOWN} -g ${BINGRP} -m 755 \
${DESTDIR}${INCLUDEDIR}/${_MARCH}; \
cd ${.CURDIR}/../sys/${_MARCH}/include; \
for h in *.h; do \
ln -fs ../../../sys/${_MARCH}/include/$$h \
${DESTDIR}${INCLUDEDIR}/${_MARCH}; \
done
.if exists(${.CURDIR}/../sys/${_MARCH}/include/pc)
${INSTALL} -d -o ${BINOWN} -g ${BINGRP} -m 755 \
${DESTDIR}${INCLUDEDIR}/${_MARCH}/pc; \
cd ${.CURDIR}/../sys/${_MARCH}/include/pc; \
for h in *.h; do \
ln -fs ../../../../sys/${_MARCH}/include/pc/$$h \
${DESTDIR}${INCLUDEDIR}/${_MARCH}/pc; \
done
.endif
.endif
cd ${.CURDIR}/../sys/fs/cd9660; \
for h in *.h; do \
ln -fs ../../../../sys/fs/cd9660/$$h \
${DESTDIR}${INCLUDEDIR}/isofs/cd9660; \
done
cd ${.CURDIR}/../sys/rpc; \
for h in types.h; do \
ln -fs ../../../sys/rpc/$$h \
${DESTDIR}${INCLUDEDIR}/rpc; \
done
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