Add support to define structures in mig.

Basic syntax is presented below and allows users to define
nested structured types by using simpler or structure types as
members. Mig will use the C padding and alignment rules to produce
the same size as the corresponding C structures.

type timespec_t = struct {
  uint32_t tv_sec;
  uint32_t tv_nsec;
};

This allows us to build stubs that are more easily adaptable to other
architectures.
Message-Id: <Y2SjQSMOINY8I5Dy@viriathus>

1 files changed, 3 insertions, 1 deletions

diff --git a/type.h b/type.h
index 6cf5d63..6031ee1 100644
--- a/type.h
+++ b/type.h
@@ -143,6 +143,7 @@ typedef struct ipc_type
     u_int itTypeSize;		/* size of the C type */
     u_int itPadSize;		/* amount of padding after data */
     u_int itMinTypeSize;	/* minimal amount of space occupied by data */
+    u_int itAlignment;         /* alignment required for this type */
 
     u_int itInName;		/* name supplied to kernel in sent msg */
     u_int itOutName;		/* name in received msg */
@@ -193,7 +194,8 @@ extern ipc_type_t *itResetType(ipc_type_t *it);
 extern ipc_type_t *itVarArrayDecl(u_int number, const ipc_type_t *it);
 extern ipc_type_t *itArrayDecl(u_int number, const ipc_type_t *it);
 extern ipc_type_t *itPtrDecl(ipc_type_t *it);
-extern ipc_type_t *itStructDecl(u_int number, const ipc_type_t *it);
+extern ipc_type_t *itStructArrayDecl(u_int number, const ipc_type_t *it);
+extern ipc_type_t *itStructDecl(u_int min_type_size_in_bytes, u_int required_alignment_in_bytes);
 extern ipc_type_t *itCStringDecl(u_int number, boolean_t varying);
 
 extern ipc_type_t *itRetCodeType;