-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Eric Blake on 6/6/2008 6:25 AM: | According to Bruno Haible on 6/6/2008 5:29 AM: | | The type of the third argument, according to POSIX, is 'void *ucp'. | Why does | | it have to be cast? Why is it not directly 'ucontext_t *ucp' (since, | as you | | say, ucontext_t will be defined in <signal.h>)? | | I think POSIX is catering to the fact that older platforms (in particular | BSD) typed it as 'struct sigcontext *sc' instead. More importantly, | ucontext_t is an XSI extension; you can be POSIX compliant but not XSI | compliant; in that case, you lack ucontext_t, and the third argument to a | sigaction handler must be an unusable void* (which is pretty much what I | discovered about OpenBSD 4.0).
I spoke too soon. In POSIX 2001, ucontext_t is XSI. But in 200x, it has been promoted to CX (ie. mandatory for all POSIX implementations, but still an extension to C99). - -- Don't work too hard, make some time for fun as well! Eric Blake [EMAIL PROTECTED] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkhJMbkACgkQ84KuGfSFAYD39wCfc9+JvLLtlVqdzIBdyqURsAXW Df8AnApIhDIt1STR0HXMDthT0PixWR5G =M0wd -----END PGP SIGNATURE-----
