Interoperating with C code, I was not able to directly cast a structure and I was forced to define an equivalent one in Go.
The C function from libproc.h is
int proc_pidinfo(int pid, int flavor, uint64_t arg, void *buffer, int buffersize)
The C structure for flavor==PROC_PIDTASKINFO is proc_taskinfo as defined in sys/proc_info.h (included by libproc.h):
struct proc_taskinfo {
uint64_t pti_virtual_size; /* virtual memory size (bytes) */
uint64_t pti_resident_size; /* resident memory size (bytes) */
uint64_t pti_total_user; /* total time */
uint64_t pti_total_system;
uint64_t pti_threads_user; /* existing threads only */
uint64_t pti_threads_system;
int32_t pti_policy; /* default policy for new threads */
int32_t pti_faults; /* number of page faults */
int32_t pti_pageins; /* number of actual pageins */
int32_t pti_cow_faults; /* number of copy-on-write faults */
int32_t pti_messages_sent; /* number of messages sent */
int32_t pti_messages_received; /* number of messages received */
int32_t pti_syscalls_mach; /* number of mach system calls */
int32_t pti_syscalls_unix; /* number of unix system calls */
int32_t pti_csw; /* number of context switches */
int32_t pti_threadnum; /* number of threads in the task */
int32_t pti_numrunning; /* number of running threads */
int32_t pti_priority; /* task priority*/
};
Even if Go code actually works, I was not able to use C.proc_taskinfo directly. The Go function is propertiesOf(): complete source here.
If I reference the C structure, I got a similar error reported as in my latest question on the subject: could not determine kind of name for C.proc_taskinfo, but this time I'm sure the definition is imported with #include.
