Determines if an mbuf structure has an attached cluster.
#include <sys/types.h> #include <sys/errno.h> #include <sys/mbuf.h>
struct mbuf *m; M_HASCL (m);
| m | Indicates the address of the mbuf structure in question. |
The M_HASCL macro determines if an mbuf structure has an attached cluster.
The M_HASCL macro can be called from either the process or interrupt environment.
The M_HASCL macro can be used as in the following example:
struct mbuf *m;
if (M_HASCL(m))
printf("mbuf has attached cluster");
The M_HASCL macro is part of Base Operating System (BOS) Runtime.
I/O Kernel Services in AIX Kernel Extensions and Device Support Programming Concepts.