Reputation: 511
Can someone explain this typedef please?
typedef void (*_sig_func_ptr)(int);
Understanding its meaning seems critical to answering my question: MPICH2 compilation issue using Cygwin
Upvotes: 1
Views: 126
Reputation: 145919
This is the syntax of the typedef
of a function pointer type.
Here _sig_func_ptr
is an alias for the type void (*)(int)
.
An object of type _sig_func_ptr
is a pointer to a function with one int
parameter and that returns nothing.
Upvotes: 2
Reputation: 44316
it declares a type which is a function pointer which takes an int and returns void
can be used like :-
void blah(int x)
{
}
_sig_func_ptr ptr;
ptr = blah; // make ptr point to blah
ptr(12); // now we can call blah by using the function pointer
Upvotes: 3