18 Sep
2005
18 Sep
'05
2:21 p.m.
On 9236 day of my life David Hopwood wrote:
In the case of shared memory concurrency, killing processes asynchronously is a minefield; it is so difficult to do right that IMO it should not be attempted.
Un Unix-like (or POSIX-like) The only safe thing you can do during asynchronous interrupt handling is to read or set variable of some type sig_atomic_t.
Doing anything else is opening can of worm.
And it doesn't matter if it is shared memory concurrency or single-thread program: what if process receives yet another asynchronous signal in signal handler? It may corrupt variable you write to if it is other than sig_atomic_t.
--
Ivan Boldyrev
XML -- new language of ML family.