# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1310646156 -3600
# Node ID 3b2827da23585a7fa93d1e6fc4db4d196706ebf8
# Parent 7e8ce32eda26230ce34476172d8a5f77596bb62b
libxl: IDL: handle generation of pass-by-reference arguments.
Up until now everything with a destructor function happened to be
pass-by-reference so the current code worked but this will not be the case for
*_to_string and *_to_json. Put some infrastructure in place and use it.
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
diff -r 7e8ce32eda26 -r 3b2827da2358 tools/libxl/gentypes.py
--- a/tools/libxl/gentypes.py Thu Jul 14 13:22:36 2011 +0100
+++ b/tools/libxl/gentypes.py Thu Jul 14 13:22:36 2011 +0100
@@ -178,10 +178,10 @@ if __name__ == '__main__':
for ty in types:
f.write(libxl_C_type_define(ty) + ";\n")
if ty.destructor_fn is not None:
- f.write("void %s(%s *p);\n" % (ty.destructor_fn, ty.typename))
+ f.write("void %s(%s);\n" % (ty.destructor_fn, ty.make_arg("p")))
if isinstance(ty, libxltypes.Enumeration):
- f.write("const char *%s_to_string(%s e);\n" % (ty.typename,
ty.typename))
- f.write("int %s_from_string(const char *s, %s *e);\n" %
(ty.typename, ty.typename))
+ f.write("const char *%s_to_string(%s);\n" % (ty.typename,
ty.make_arg("p")))
+ f.write("int %s_from_string(const char *s, %s);\n" % (ty.typename,
ty.make_arg("e", passby=libxltypes.PASS_BY_REFERENCE)))
f.write("extern libxl_enum_string_table %s_string_table[];\n" %
(ty.typename))
f.write("\n")
@@ -213,7 +213,7 @@ if __name__ == '__main__':
""" % " ".join(sys.argv))
for ty in [t for t in types if t.destructor_fn is not None and
t.autogenerate_destructor]:
- f.write("void %s(%s *p)\n" % (ty.destructor_fn, ty.typename))
+ f.write("void %s(%s)\n" % (ty.destructor_fn, ty.make_arg("p")))
f.write("{\n")
f.write(libxl_C_type_destroy(ty, "p"))
f.write(" memset(p, LIBXL_DTOR_POISON, sizeof(*p));\n")
diff -r 7e8ce32eda26 -r 3b2827da2358 tools/libxl/libxl.idl
--- a/tools/libxl/libxl.idl Thu Jul 14 13:22:36 2011 +0100
+++ b/tools/libxl/libxl.idl Thu Jul 14 13:22:36 2011 +0100
@@ -4,8 +4,8 @@
#
libxl_domid = Builtin("domid")
-libxl_uuid = Builtin("uuid")
-libxl_mac = Builtin("mac")
+libxl_uuid = Builtin("uuid", passby=PASS_BY_REFERENCE)
+libxl_mac = Builtin("mac", passby=PASS_BY_REFERENCE)
libxl_cpumap = Builtin("cpumap", destructor_fn="libxl_cpumap_destroy",
passby=PASS_BY_REFERENCE)
libxl_cpuarray = Builtin("cpuarray", destructor_fn="libxl_cpuarray_destroy",
passby=PASS_BY_REFERENCE)
libxl_cpuid_policy_list = Builtin("cpuid_policy_list",
destructor_fn="libxl_cpuid_destroy", passby=PASS_BY_REFERENCE)
diff -r 7e8ce32eda26 -r 3b2827da2358 tools/libxl/libxltypes.py
--- a/tools/libxl/libxltypes.py Thu Jul 14 13:22:36 2011 +0100
+++ b/tools/libxl/libxltypes.py Thu Jul 14 13:22:36 2011 +0100
@@ -42,6 +42,14 @@ class Type(object):
def marshal_out(self):
return self.dir in [DIR_OUT, DIR_BOTH]
+ def make_arg(self, n, passby=None):
+ if passby is None: passby = self.passby
+
+ if passby == PASS_BY_REFERENCE:
+ return "%s *%s" % (self.typename, n)
+ else:
+ return "%s %s" % (self.typename, n)
+
class Builtin(Type):
"""Builtin type"""
def __init__(self, typename, **kwargs):
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