add pthread_cancel, obtained from OpenBSD.

eischen (Daniel Eischen) added wrappers to protect against cancled
threads orphaning internal resources.

the cancelability code is still a bit fuzzy but works for test
programs of my own, OpenBSD's and some examples from ORA's books.

add readdir_r to both libc and libc_r

add some 'const' attributes to function parameters

Reviewed by: eischen, jasone

1 files changed, 7 insertions, 3 deletions

diff --git a/lib/libc_r/Makefile b/lib/libc_r/Makefile
index 28ce615..87110f0 100644
--- a/lib/libc_r/Makefile
+++ b/lib/libc_r/Makefile
@@ -15,6 +15,9 @@ CFLAGS+=-DPTHREAD_KERNEL -D_THREAD_SAFE -I${.CURDIR}/uthread
 # thread locking.
 CFLAGS+=-D_LOCK_DEBUG
 
+# enable extra internal consistancy checks
+# CFLAGS+=-D_PTHREADS_INVARIANTS
+
 AINC=	-I${.CURDIR}/../libc/${MACHINE_ARCH} -I${.CURDIR}/uthread
 PRECIOUSLIB=	yes
 
@@ -25,11 +28,12 @@ PRECIOUSLIB=	yes
 HIDDEN_SYSCALLS= accept.o bind.o close.o connect.o dup.o dup2.o \
 	execve.o fchflags.o fchmod.o fchown.o fcntl.o \
 	flock.o fpathconf.o fstat.o fstatfs.o fsync.o getdirentries.o \
-	getpeername.o getsockname.o getsockopt.o ioctl.o listen.o \
-	nanosleep.o nfssvc.o open.o poll.o read.o readv.o recvfrom.o \
+	getlogin.o getpeername.o getsockname.o getsockopt.o ioctl.o listen.o \
+	msync.o nanosleep.o nfssvc.o open.o poll.o read.o readv.o recvfrom.o \
 	recvmsg.o sched_yield.o select.o sendmsg.o sendto.o \
 	setsockopt.o shutdown.o sigaction.o sigaltstack.o \
-	signanosleep.o sigpending.o sigprocmask.o sigsuspend.o socket.o \
+	signanosleep.o sigpending.o sigprocmask.o sigreturn.o sigsetmask.o \
+	sigsuspend.o socket.o \
 	socketpair.o wait4.o write.o writev.o
 
 .include "${.CURDIR}/../libc/Makefile.inc"