minix/lib/libsys/vm_query_exit.c
2014-07-28 17:06:19 +02:00

37 lines
806 B
C

#include "syslib.h"
#include <unistd.h>
#include <string.h>
/*
* Return a negative error code if the query itself or the processing of the
* query resulted in an error.
* Return 1 if there are more processes waiting to be queried.
* Return 0 if there are no more processes.
* Note that for the return value of 0 and 1, the 'endpt' is set accordingly.
*/
int
vm_query_exit(int *endpt)
{
message m;
int r;
memset(&m, 0, sizeof(m));
r = _taskcall(VM_PROC_NR, VM_QUERY_EXIT, &m);
if (r != OK)
return r;
if (endpt == NULL)
return EFAULT;
*endpt = m.m_lsys_vm_query_exit.ret_pt;
return (m.m_lsys_vm_query_exit.is_more ? 1 : 0);
}
int
vm_watch_exit(endpoint_t ep)
{
message m;
memset(&m, 0, sizeof(m));
m.m_lsys_vm_watch_exit.ep = ep;
return _taskcall(VM_PROC_NR, VM_WATCH_EXIT, &m);
}