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authoraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-01-22 16:59:20 +0000
committeraliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>2009-01-22 16:59:20 +0000
commit44e3ee8a2aaee5df49cd440446fee4525144255f (patch)
tree450cf688ca2c46221c9e4447da0bbabde0398b29 /qemu-common.h
parentba223c29da480b40b38678c66636ee9910973a47 (diff)
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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
Diffstat (limited to 'qemu-common.h')
-rw-r--r--qemu-common.h12
1 files changed, 12 insertions, 0 deletions
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 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id);
/* 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