Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / core / monojob.c

diff --git a/qemu/roms/ipxe/src/core/monojob.c b/qemu/roms/ipxe/src/core/monojob.c
new file mode 100644 (file)
index 0000000..820fa31
--- /dev/null
+++ b/qemu/roms/ipxe/src/core/monojob.c
@@ -0,0 +1,152 @@
+/*
+ * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+#include <ipxe/process.h>
+#include <ipxe/console.h>
+#include <ipxe/keys.h>
+#include <ipxe/job.h>
+#include <ipxe/monojob.h>
+#include <ipxe/timer.h>
+
+/** @file
+ *
+ * Single foreground job
+ *
+ */
+
+static int monojob_rc;
+
+static void monojob_close ( struct interface *intf, int rc ) {
+       monojob_rc = rc;
+       intf_restart ( intf, rc );
+}
+
+static struct interface_operation monojob_intf_op[] = {
+       INTF_OP ( intf_close, struct interface *, monojob_close ),
+};
+
+static struct interface_descriptor monojob_intf_desc =
+       INTF_DESC_PURE ( monojob_intf_op );
+
+struct interface monojob = INTF_INIT ( monojob_intf_desc );
+
+/**
+ * Wait for single foreground job to complete
+ *
+ * @v string           Job description to display, or NULL to be silent
+ * @v timeout          Timeout period, in ticks (0=indefinite)
+ * @ret rc             Job final status code
+ */
+int monojob_wait ( const char *string, unsigned long timeout ) {
+       struct job_progress progress;
+       unsigned long last_keycheck;
+       unsigned long last_progress;
+       unsigned long last_display;
+       unsigned long now;
+       unsigned long elapsed;
+       unsigned long completed = 0;
+       unsigned long scaled_completed;
+       unsigned long scaled_total;
+       unsigned int percentage;
+       int shown_percentage = 0;
+       int ongoing_rc;
+       int key;
+       int rc;
+
+       if ( string )
+               printf ( "%s...", string );
+       monojob_rc = -EINPROGRESS;
+       last_keycheck = last_progress = last_display = currticks();
+       while ( monojob_rc == -EINPROGRESS ) {
+
+               /* Allow job to progress */
+               step();
+               now = currticks();
+
+               /* Check for keypresses.  This can be time-consuming,
+                * so check only once per clock tick.
+                */
+               elapsed = ( now - last_keycheck );
+               if ( elapsed ) {
+                       if ( iskey() ) {
+                               key = getchar();
+                               if ( key == CTRL_C ) {
+                                       monojob_rc = -ECANCELED;
+                                       break;
+                               }
+                       }
+                       last_keycheck = now;
+               }
+
+               /* Monitor progress */
+               ongoing_rc = job_progress ( &monojob, &progress );
+
+               /* Reset timeout if progress has been made */
+               if ( completed != progress.completed )
+                       last_progress = now;
+               completed = progress.completed;
+
+               /* Check for timeout, if applicable */
+               elapsed = ( now - last_progress );
+               if ( timeout && ( elapsed >= timeout ) ) {
+                       monojob_rc = ( ongoing_rc ? ongoing_rc : -ETIMEDOUT );
+                       break;
+               }
+
+               /* Display progress, if applicable */
+               elapsed = ( now - last_display );
+               if ( string && ( elapsed >= TICKS_PER_SEC ) ) {
+                       if ( shown_percentage )
+                               printf ( "\b\b\b\b    \b\b\b\b" );
+                       /* Normalise progress figures to avoid overflow */
+                       scaled_completed = ( progress.completed / 128 );
+                       scaled_total = ( progress.total / 128 );
+                       if ( scaled_total ) {
+                               percentage = ( ( 100 * scaled_completed ) /
+                                              scaled_total );
+                               printf ( "%3d%%", percentage );
+                               shown_percentage = 1;
+                       } else {
+                               printf ( "." );
+                               shown_percentage = 0;
+                       }
+                       last_display = now;
+               }
+       }
+       rc = monojob_rc;
+       monojob_close ( &monojob, rc );
+
+       if ( shown_percentage )
+               printf ( "\b\b\b\b    \b\b\b\b" );
+
+       if ( string ) {
+               if ( rc ) {
+                       printf ( " %s\n", strerror ( rc ) );
+               } else {
+                       printf ( " ok\n" );
+               }
+       }
+
+       return rc;
+}