Oded Arbel <[EMAIL PROTECTED]> writes:
> public:
> CCritical(char* pathname) {
> union semun semopts;
This is an incomplete declaration, as the compiler tells you.
A union is a struct in which all members are allocated at the same
address. The declaration syntax is similar to that of structs.
Usually, doing sth like
egrep -n semun $(find /usr/include -name \*.h) /dev/null
helps. In this case, you'll find the following in bits/sem.h
(which is included by sys/sem.h):
/* The user should define a union like the following to use it for arguments
for `semctl'.
union semun
{
int val; <= value for SETVAL
struct semid_ds *buf; <= buffer for IPC_STAT & IPC_SET
unsigned short int *array; <= array for GETALL & SETALL
struct seminfo *__buf; <= buffer for IPC_INFO
};
Previous versions of this file used to define this union but this is
incorrect. One can test the macro _SEM_SEMUN_UNDEFINED to see whether
one must define the union or not. */
Hope it helps.
--
Oleg Goldshmidt | [EMAIL PROTECTED]
"I'd rather write programs to write programs than write programs."
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