| commit | 032f492af0ac27772a09c54f56a7ef2a8e06c1a0 | |
| author | Alexander Viro <viro@www.linux.org.uk> | |
| Sun, 5 Sep 2004 02:56:24 +0000 (4 19:56 -0700) | ||
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | |
| Fri, 8 Apr 2005 04:03:05 +0000 (7 21:03 -0700) | ||
| tree | 55b46a3c14d9a83d5388a90b59949e6981c5a056 | treesnapshot (tar.gz zip) |
| parent | 48e449e622686e5867de88439def77a3499df5ba | commitdiff |
[PATCH] __attribute__((bitwise))
Handling of __attribute__((bitwise)) in a way that should be easy to extend
afterwards. Example of use:
typedef __u32 __attribute__((bitwise)) __le32;
That will create a new 32bit type that will be assignment-incompatible with
anything else. The set of allowed operations is restricted to bitwise ones,
the only allowed constant is 0 right now. Forced casts are allowed, so is
cast from type to itself and cast to void. Any other cast will give a warning.
Checks are triggered by -Wbitwise in command line; if it's not there,
attribute will be silently ignored.
Handling of __attribute__((bitwise)) in a way that should be easy to extend
afterwards. Example of use:
typedef __u32 __attribute__((bitwise)) __le32;
That will create a new 32bit type that will be assignment-incompatible with
anything else. The set of allowed operations is restricted to bitwise ones,
the only allowed constant is 0 right now. Forced casts are allowed, so is
cast from type to itself and cast to void. Any other cast will give a warning.
Checks are triggered by -Wbitwise in command line; if it's not there,
attribute will be silently ignored.