htop/linux/IOPriorityPanel.c

/*
htop - IOPriorityPanel.c
(C) 2004-2012 Hisham H. Muhammad
Released under the GNU GPLv2, see the COPYING file
in the source distribution for its full text.
*/

#include "IOPriorityPanel.h"

#include <stdbool.h>
#include <stddef.h>

#include "FunctionBar.h"
#include "ListItem.h"
#include "Object.h"
#include "XUtils.h"


Panel* IOPriorityPanel_new(IOPriority currPrio) {
   Panel* this = Panel_new(1, 1, 1, 1, true, Class(ListItem), FunctionBar_newEnterEsc("Set    ", "Cancel "));

   Panel_setHeader(this, "IO Priority:");
   Panel_add(this, (Object*) ListItem_new("None (based on nice)", IOPriority_None));
   if (currPrio == IOPriority_None) {
      Panel_setSelected(this, 0);
   }
   static const struct {
      int klass;
      const char* name;
   } classes[] = {
      { .klass = IOPRIO_CLASS_RT, .name = "Realtime" },
      { .klass = IOPRIO_CLASS_BE, .name = "Best-effort" },
      { .klass = 0, .name = NULL }
   };
   for (int c = 0; classes[c].name; c++) {
      for (int i = 0; i < 8; i++) {
         char name[50];
         xSnprintf(name, sizeof(name) - 1, "%s %d %s", classes[c].name, i, i == 0 ? "(High)" : (i == 7 ? "(Low)" : ""));
         IOPriority ioprio = IOPriority_tuple(classes[c].klass, i);
         Panel_add(this, (Object*) ListItem_new(name, ioprio));
         if (currPrio == ioprio) {
            Panel_setSelected(this, Panel_size(this) - 1);
         }
      }
   }
   Panel_add(this, (Object*) ListItem_new("Idle", IOPriority_Idle));
   if (currPrio == IOPriority_Idle) {
      Panel_setSelected(this, Panel_size(this) - 1);
   }
   return this;
}

IOPriority IOPriorityPanel_getIOPriority(Panel* this) {
   const ListItem* selected = (ListItem*) Panel_getSelected(this);
   return selected ? selected->key : IOPriority_None;
}