146 lines
3.1 KiB
C
146 lines
3.1 KiB
C
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#define _SYSTEM 1
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#include <minix/callnr.h>
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#include <minix/com.h>
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#include <minix/config.h>
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#include <minix/const.h>
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#include <minix/ds.h>
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#include <minix/endpoint.h>
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#include <minix/keymap.h>
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#include <minix/minlib.h>
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#include <minix/type.h>
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#include <minix/ipc.h>
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#include <minix/sysutil.h>
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#include <minix/syslib.h>
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#include <minix/safecopies.h>
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#include <minix/bitmap.h>
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#include <minix/vm.h>
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#include <minix/ds.h>
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#include <errno.h>
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#include <string.h>
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#include <env.h>
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#include <stdio.h>
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#include "glo.h"
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#include "proto.h"
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#include "util.h"
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struct query_exit_struct {
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int avail;
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endpoint_t ep;
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};
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static struct query_exit_struct array[NR_PROCS];
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/*===========================================================================*
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* do_query_exit *
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*===========================================================================*/
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PUBLIC int do_query_exit(message *m)
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{
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int i, nr;
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endpoint_t ep = NONE;
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for (i = 0; i < NR_PROCS; i++) {
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if (!array[i].avail) {
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array[i].avail = 1;
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ep = array[i].ep;
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array[i].ep = 0;
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break;
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}
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}
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nr = 0;
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for (i = 0; i < NR_PROCS; i++) {
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if (!array[i].avail)
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nr++;
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}
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m->VM_QUERY_RET_PT = ep;
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m->VM_QUERY_IS_MORE = (nr > 0);
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return OK;
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}
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/*===========================================================================*
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* do_notify_sig *
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*===========================================================================*/
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PUBLIC int do_notify_sig(message *m)
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{
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int i, avails = 0;
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endpoint_t ep = m->VM_NOTIFY_SIG_ENDPOINT;
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endpoint_t ipc_ep = m->VM_NOTIFY_SIG_IPC;
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int r;
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struct vmproc *vmp;
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int pslot;
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if(vm_isokendpt(ep, &pslot) != OK) return ESRCH;
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vmp = &vmproc[pslot];
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/* Only record the event if we've been asked to report it. */
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if(!(vmp->vm_flags & VMF_WATCHEXIT))
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return OK;
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for (i = 0; i < NR_PROCS; i++) {
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/* its signal is already here */
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if (!array[i].avail && array[i].ep == ep)
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goto out;
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if (array[i].avail)
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avails++;
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}
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if (!avails) {
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/* no slot for signals, unlikely */
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printf("VM: no slot for signals!\n");
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return ENOMEM;
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}
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for (i = 0; i < NR_PROCS; i++) {
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if (array[i].avail) {
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array[i].avail = 0;
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array[i].ep = ep;
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break;
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}
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}
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out:
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/* only care when IPC server starts up,
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* and bypass the process to be signal is IPC itself.
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*/
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if (ipc_ep != 0 && ep != ipc_ep) {
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r = notify(ipc_ep);
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if (r != OK)
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printf("VM: notify IPC error!\n");
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}
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return OK;
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}
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/*===========================================================================*
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* do_watch_exit *
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*===========================================================================*/
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PUBLIC int do_watch_exit(message *m)
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{
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endpoint_t e = m->VM_WE_EP;
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struct vmproc *vmp;
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int p;
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if(vm_isokendpt(e, &p) != OK) return ESRCH;
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vmp = &vmproc[p];
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vmp->vm_flags |= VMF_WATCHEXIT;
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return OK;
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}
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/*===========================================================================*
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* init_query_exit *
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*===========================================================================*/
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PUBLIC void init_query_exit(void)
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{
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int i;
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for (i = 0; i < NR_PROCS; i++) {
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array[i].avail = 1;
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array[i].ep = 0;
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}
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}
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