Changeset 35831 in vbox

Timestamp:

Feb 3, 2011 11:34:45 AM (14 years ago)

Author:

vboxsync

Message:

VBoxManage guestcontrol execute --wait-for: adaptive sleep to prevent busy waiting

File:

• trunk/src/VBox/Frontends/VBoxManage/VBoxManageGuestCtrl.cpp (modified) (2 diffs)

trunk/src/VBox/Frontends/VBoxManage/VBoxManageGuestCtrl.cpp

@@ -492 +492 @@
                 BOOL fCompleted = FALSE;
                 BOOL fCanceled = FALSE;
+                int cMilliesSleep = 0;
                 while (SUCCEEDED(progress->COMGETTER(Completed(&fCompleted))))
                 {
@@ -575 +576 @@
                         break;
                     }
+
+                    /* Don't hog the CPU in a busy loop! */
+                    if (cbOutputData <= 0)
+                    {
+                        if (cMilliesSleep < 100)
+                            cMilliesSleep++;
+                        RTPrintf("cMilliesSleep = %d\n", cMilliesSleep);
+                        RTThreadSleep(cMilliesSleep);
+                    }
+                    else
+                        cMilliesSleep = 0;
                 }