Andy H wrote:
http://gcc.gnu.org/onlinedocs/gcc-4.1.0/gcc/Atomic-Builtins.html
To quote from the first paragraph of that manual page:
The following builtins are intended to be compatible with those
described in the Intel Itanium Processor-specific Application Binary
Interface, section 7.4. As such, they depart from the normal GCC
practice of using the “__builtin_” prefix, and further that they are
overloaded such that they work on multiple types.
I've never used these functions, so I may be skating on thin ice here -
you'll no doubt correct me if I'm wrong!
These "atomic access" builtins are very much specific to the Itanium -
they are basically wrappers around some assembly primitives, for use in
operating system fundamentals such as locks and synchronisation
primitives. For other targets, people normally just use a couple of
lines of inline assembly - for the Itanium, assembly language is so
hideous that it's worth having these builtin wrappers.
While I think it is worth having a set of consistent atomic access
builtins that work across gcc ports, I'm not sure the Itanium's
functions are the best model.
mvh.,
David
_______________________________________________
AVR-GCC-list mailing list
[email protected]
http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
