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[1/2] Add VMSTATE_STRUCT_VARRAY_KNOWN

Message ID 1452083019-15141-1-git-send-email-dgilbert@redhat.com
State New
Headers show

Commit Message

Dr. David Alan Gilbert Jan. 6, 2016, 12:23 p.m. UTC 
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

At the moment we have VMSTATE_STRUCT_ARRAY that requires
the field is declared as an array of fixed size.
We also have VMSTATE_STRUCT_VARRAY_UINT* that allows
a field declared as a pointer, but requires that the length
is a field member in the structure being loaded/saved.

VMSTATE_STRUCT_VARRAY_KNOWN is for arrays defined as pointers
yet we somehow know the length of.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 include/migration/vmstate.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)

Comments

Amit Shah Jan. 8, 2016, 12:12 p.m. UTC | #1 
On (Wed) 06 Jan 2016 [12:23:38], Dr. David Alan Gilbert (git) wrote:
> From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> 
> At the moment we have VMSTATE_STRUCT_ARRAY that requires
> the field is declared as an array of fixed size.
> We also have VMSTATE_STRUCT_VARRAY_UINT* that allows
> a field declared as a pointer, but requires that the length
> is a field member in the structure being loaded/saved.
> 
> VMSTATE_STRUCT_VARRAY_KNOWN is for arrays defined as pointers
> yet we somehow know the length of.
> 
> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

Reviewed-by: Amit Shah <amit.shah@redhat.com>

		Amit
diff mbox

Patch

diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h
index 7267e38..97d44d3 100644
--- a/include/migration/vmstate.h
+++ b/include/migration/vmstate.h
@@ -374,6 +374,19 @@  extern const VMStateInfo vmstate_info_bitmap;
     .offset       = vmstate_offset_array(_state, _field, _type, _num),\
 }
 
+/* a variable length array (i.e. _type *_field) but we know the
+ * length
+ */
+#define VMSTATE_STRUCT_VARRAY_KNOWN(_field, _state, _num, _version, _vmsd, _type) { \
+    .name       = (stringify(_field)),                               \
+    .num          = (_num),                                          \
+    .version_id = (_version),                                        \
+    .vmsd       = &(_vmsd),                                          \
+    .size       = sizeof(_type),                                     \
+    .flags      = VMS_STRUCT|VMS_ARRAY,                              \
+    .offset     = offsetof(_state, _field),                          \
+}
+
 #define VMSTATE_STRUCT_VARRAY_UINT8(_field, _state, _field_num, _version, _vmsd, _type) { \
     .name       = (stringify(_field)),                               \
     .num_offset = vmstate_offset_value(_state, _field_num, uint8_t), \