Richard Stallman skrev:
So, in order for BLOCK_INPUT to work reliably, it seems that
interrupt_input_blocked should be declared as volatile (or maybe
`volatile sig_atomic_t' instead of `volatile int') because it is
accessed from a signal handler.
Isn't it the case that the C spec calls for this to be volatile?
Quote form the C standard:
"The type defined is
sig_atomic_t
which is the (possibly volatile-qualified) integer type of an object that can
be accessed as an atomic entity, even in the presence of asynchronous
interrupts."
However, Neither glibc or Solaris has volatile in the definition. I think the
thing guaranteed is "accessed", not "modified".
Jan D.
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