sigsafe

sigsafe is a C library for safely, reliably, and promptly handling signals delivered to specific threads without significant overhead. This is a common and challenging problem, and sigsafe can help. Please see the API documentation for examples.

sigsafe includes code, documentation, a performance benchmark, and a correctness tester that exhaustively searches for race conditions with the ptrace(2) facility.

sigsafe contains architecture- and OS-specific assembly code. It is currently available for:

Darwin/ppc (OS X)
FreeBSD/alpha
FreeBSD/i386
Linux/alpha
Linux/i386
Linux/ia64
HP-UX/ia64
HP-UX/parisc
NetBSD/i386
Solaris/i386
Solaris/sparc
Tru64/alpha

sigsafe is released under the MIT license.

You are welcome to:

browse the API documentation online.
look at the README.
download the latest (0.1.3) release. The race condition tester is not working on most platforms, but the core code works when tested manually.
browse the head revision in my Subversion repository.
watch the project on freshmeat, advogato, or sourceforge.
join the discussion on the mailing list or read the archives. Discussion of sigsafe development, usage or any other method of safe signal handling is welcome here.
watch the commits mailing list or read the archives.
email me with constructive criticism, patches, compliments, flames, etc.