Use common objects for qemu-img and qemu-nbd

Right now, we sprinkle #if defined(QEMU_IMG) && defined(QEMU_NBD) all over the
code.  It's ugly and causes us to have to build multiple object files for
linking against qemu and the tools.

This patch introduces a new file, qemu-tool.c which contains enough for
qemu-img, qemu-nbd, and QEMU to all share the same objects.

This also required getting qemu-nbd to be a bit more Windows friendly.  I also
changed the Windows block-raw to use normal IO instead of overlapping IO since
we don't actually do AIO yet on Windows.  I changed the various #if 0's to
 #if WIN32_AIO to make it easier for someone to eventually fix AIO on Windows.

After this patch, there are no longer any #ifdef's related to qemu-img and
qemu-nbd.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5226 c046a42c-6fe2-441c-8c8c-71466251a162

qemu-tool.c

@@ -0,0 +1,83 @@
+/*
+ * Compatibility for qemu-img/qemu-nbd
+ *
+ * Copyright IBM, Corp. 2008
+ *
+ * Authors:
+ *  Anthony Liguori   <aliguori@us.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu-common.h"
+#include "console.h"
+#include "sysemu.h"
+#include "qemu-timer.h"
+
+#include <sys/time.h>
+
+QEMUClock *rt_clock;
+
+struct QEMUBH
+{
+    QEMUBHFunc *cb;
+    void *opaque;
+};
+
+void term_printf(const char *fmt, ...)
+{
+}
+
+void term_print_filename(const char *filename)
+{
+}
+
+QEMUBH *qemu_bh_new(QEMUBHFunc *cb, void *opaque)
+{
+    QEMUBH *bh;
+
+    bh = qemu_malloc(sizeof(*bh));
+    if (bh) {
+        bh->cb = cb;
+        bh->opaque = opaque;
+    }
+
+    return bh;
+}
+
+int qemu_bh_poll(void)
+{
+    return 0;
+}
+
+void qemu_bh_schedule(QEMUBH *bh)
+{
+    bh->cb(bh->opaque);
+}
+
+void qemu_bh_cancel(QEMUBH *bh)
+{
+}
+
+void qemu_bh_delete(QEMUBH *bh)
+{
+    qemu_free(bh);
+}
+
+int qemu_set_fd_handler2(int fd,
+                         IOCanRWHandler *fd_read_poll,
+                         IOHandler *fd_read,
+                         IOHandler *fd_write,
+                         void *opaque)
+{
+    return 0;
+}
+
+int64_t qemu_get_clock(QEMUClock *clock)
+{
+    struct timeval tv;
+    gettimeofday(&tv, NULL);
+    return (tv.tv_sec * 1000000000LL + (tv.tv_usec * 1000)) / 1000000;
+}