I/O vector helpers (Avi Kivity)
In general, it is not possible to predict the size of of an I/O vector since
a contiguous guest region may map to a disconiguous host region. Add some
helpers to manage I/O vector growth.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6396 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/qemu-common.h b/qemu-common.h
index d83e61b..ae773e0 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -191,6 +191,18 @@
/* Force QEMU to stop what it's doing and service IO */
void qemu_service_io(void);
+typedef struct QEMUIOVector {
+ struct iovec *iov;
+ int niov;
+ int nalloc;
+} QEMUIOVector;
+
+void qemu_iovec_init(QEMUIOVector *qiov, int alloc_hint);
+void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len);
+void qemu_iovec_destroy(QEMUIOVector *qiov);
+void qemu_iovec_to_buffer(QEMUIOVector *qiov, void *buf);
+void qemu_iovec_from_buffer(QEMUIOVector *qiov, const void *buf);
+
#endif /* dyngen-exec.h hack */
#endif
