diff options
Diffstat (limited to 'lib/libc_r/NOTES')
| -rw-r--r-- | lib/libc_r/NOTES | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/lib/libc_r/NOTES b/lib/libc_r/NOTES index 938de76867a..25669e05d0b 100644 --- a/lib/libc_r/NOTES +++ b/lib/libc_r/NOTES @@ -85,6 +85,17 @@ Errno to worry about in comparison to the huge penalty hit of handling a signal and restoring the rest of a thread's context. + It has been pointed out that this technique will not work in a + mutiprocessor environment, and this is quite true. However the following + reasons are quite persuasive: + + - OpenBSD does not do MP (yet) + - This (FreeBSD uthread) implementation will not work in an MP + environment anyway because _thread_run is not a cpu-local variable. + - There is a lot of coupling between binary ports and old libc and + other libraries that is quite a big headache to resolve in a + friendly manner. + Compiler Support The in-tree gcc had its config/openbsd.h modified to support a @@ -94,6 +105,13 @@ Compiler Support The objective-C component was also made aware of posix threads, via the configure switch --enable-threads=posix. +Changes to FreeBSD uthreads + + The following significant changes have been made to John Birrell's + uthreads implementation: + + - the SIGINFO handler generates much more friendly output + Caveats Not everything above is working right now: read the TODO file. @@ -122,4 +140,4 @@ References San Antionio, Texas, 1992. pp. 185-198 David Leonard <leonard@csee.uq.edu.au> -$OpenBSD: NOTES,v 1.1 1998/08/27 09:00:32 d Exp $ +$OpenBSD: NOTES,v 1.2 1999/01/10 22:50:07 d Exp $ |