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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH V4 17/24] libxl IDL: generate deep copy functions
Introduces copy_fn for a type.
For most builtin types we can use direct assignment. For those builtin
types which cannot use direct assignment we use the copy functions in
previous patch.
Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
tools/libxl/gentypes.py | 67 ++++++++++++++++++++++++++++++++++
tools/libxl/idl.py | 13 ++++++-
tools/libxl/idl.txt | 12 ++++++
tools/libxl/libxl_types.idl | 26 ++++++++-----
tools/libxl/libxl_types_internal.idl | 2 +-
5 files changed, 108 insertions(+), 12 deletions(-)
diff --git a/tools/libxl/gentypes.py b/tools/libxl/gentypes.py
index 3e1140d..919d2d3 100644
--- a/tools/libxl/gentypes.py
+++ b/tools/libxl/gentypes.py
@@ -100,6 +100,61 @@ def libxl_C_type_dispose(ty, v, indent = " ", parent =
None):
s = indent + s
return s.replace("\n", "\n%s" % indent).rstrip(indent)
+def libxl_C_type_copy(ty, v, w, indent = " ", vparent = None, wparent =
None):
+ s = ""
+
+ if vparent is None:
+ s += "GC_INIT(ctx);\n";
+
+ if isinstance(ty, idl.KeyedUnion):
+ if vparent is None or wparent is None:
+ raise Exception("KeyedUnion type must have a parent")
+ s += "%s = %s;\n" % ((vparent + ty.keyvar.name), (wparent +
ty.keyvar.name))
+ s += "switch (%s) {\n" % (wparent + ty.keyvar.name)
+ for f in ty.fields:
+ (vnparent,vfexpr) = ty.member(v, f, vparent is None)
+ (wnparent,wfexpr) = ty.member(w, f, wparent is None)
+ s += "case %s:\n" % f.enumname
+ if f.type is not None:
+ s += libxl_C_type_copy(f.type, vfexpr, wfexpr, indent + " ",
+ vnparent, wnparent)
+ s += " break;\n"
+ s += "}\n"
+ elif isinstance(ty, idl.Array):
+ if vparent is None or wparent is None:
+ raise Exception("Array type must have a parent")
+ s += "%s = libxl__calloc(NOGC, %s, sizeof(*%s));\n" % (ty.pass_arg(v,
vparent is None),
+ (wparent +
ty.lenvar.name),
+ ty.pass_arg(w,
wparent is None))
+ s += "%s = %s;\n" % ((vparent + ty.lenvar.name), (wparent +
ty.lenvar.name))
+ s += "{\n"
+ s += " int i;\n"
+ s += " for (i=0; i<%s; i++)\n" % (wparent + ty.lenvar.name)
+ s += libxl_C_type_copy(ty.elem_type, v+"[i]", w+"[i]",
+ indent + " ", vparent, wparent)
+ s += "}\n"
+ elif isinstance(ty, idl.Struct) and ((vparent is None and wparent is None)
or ty.copy_fn is None):
+ for f in [f for f in ty.fields if not f.const and not f.type.private]:
+ (vnparent,vfexpr) = ty.member(v, f, vparent is None)
+ (wnparent,wfexpr) = ty.member(w, f, wparent is None)
+ s += libxl_C_type_copy(f.type, vfexpr, wfexpr, "", vnparent,
wnparent)
+ else:
+ if ty.copy_fn is not None:
+ s += "%s(ctx, %s, %s);\n" % (ty.copy_fn,
+ ty.pass_arg(v, vparent is None,
passby=idl.PASS_BY_REFERENCE),
+ ty.pass_arg(w, wparent is None,
passby=idl.PASS_BY_REFERENCE))
+
+ else:
+ s += "%s = %s;\n" % (ty.pass_arg(v, vparent is None,
passby=idl.PASS_BY_VALUE),
+ ty.pass_arg(w, wparent is None,
passby=idl.PASS_BY_VALUE))
+
+ if vparent is None:
+ s += "GC_FREE;\n"
+
+ if s != "":
+ s = indent + s
+ return s.replace("\n", "\n%s" % indent).rstrip(indent)
+
def libxl_init_members(ty, nesting = 0):
"""Returns a list of members of ty which require a separate init"""
@@ -430,6 +485,9 @@ if __name__ == '__main__':
f.write(libxl_C_type_define(ty) + ";\n")
if ty.dispose_fn is not None:
f.write("%svoid %s(%s);\n" % (ty.hidden(), ty.dispose_fn,
ty.make_arg("p")))
+ if ty.copy_fn is not None:
+ f.write("%svoid %s(libxl_ctx *ctx, %s, %s);\n" % (ty.hidden(),
ty.copy_fn,
+ ty.make_arg("dst"),
ty.make_arg("src")))
if ty.init_fn is not None:
f.write("%svoid %s(%s);\n" % (ty.hidden(), ty.init_fn,
ty.make_arg("p")))
for field in libxl_init_members(ty):
@@ -509,6 +567,15 @@ if __name__ == '__main__':
f.write(" memset(p, LIBXL_DTOR_POISON, sizeof(*p));\n")
f.write("}\n")
f.write("\n")
+
+ for ty in [t for t in types if t.copy_fn and t.autogenerate_copy_fn]:
+ f.write("void %s(libxl_ctx *ctx, %s, %s)\n" % (ty.copy_fn,
+ ty.make_arg("dst",
passby=idl.PASS_BY_REFERENCE),
+ ty.make_arg("src",
passby=idl.PASS_BY_REFERENCE)))
+ f.write("{\n")
+ f.write(libxl_C_type_copy(ty, "dst", "src"))
+ f.write("}\n")
+ f.write("\n")
for ty in [t for t in types if t.init_fn is not None and
t.autogenerate_init_fn]:
f.write(libxl_C_type_init(ty))
diff --git a/tools/libxl/idl.py b/tools/libxl/idl.py
index 9ce1e33..3498af1 100644
--- a/tools/libxl/idl.py
+++ b/tools/libxl/idl.py
@@ -60,6 +60,13 @@ class Type(object):
self.autogenerate_dispose_fn =
kwargs.setdefault('autogenerate_dispose_fn', True)
+ if self.typename is not None:
+ self.copy_fn = kwargs.setdefault('copy_fn', self.typename +
"_copy")
+ else:
+ self.copy_fn = kwargs.setdefault('copy_fn', None)
+
+ self.autogenerate_copy_fn = kwargs.setdefault('autogenerate_copy_fn',
True)
+
self.init_fn = kwargs.setdefault('init_fn', None)
self.init_val = kwargs.setdefault('init_val', None)
self.autogenerate_init_fn = kwargs.setdefault('autogenerate_init_fn',
False)
@@ -121,6 +128,7 @@ class Number(Builtin):
def __init__(self, ctype, **kwargs):
kwargs.setdefault('namespace', None)
kwargs.setdefault('dispose_fn', None)
+ kwargs.setdefault('copy_fn', None)
kwargs.setdefault('signed', False)
kwargs.setdefault('json_gen_fn', "yajl_gen_integer")
kwargs.setdefault('json_parse_type', "JSON_INTEGER")
@@ -134,6 +142,7 @@ class UInt(Number):
kwargs.setdefault('namespace', None)
kwargs.setdefault('dispose_fn', None)
kwargs.setdefault('json_parse_fn', "libxl__uint%d_parse_json" % w)
+ kwargs.setdefault('copy_fn', None)
Number.__init__(self, "uint%d_t" % w, **kwargs)
self.width = w
@@ -150,6 +159,7 @@ class EnumerationValue(object):
class Enumeration(Type):
def __init__(self, typename, values, **kwargs):
kwargs.setdefault('dispose_fn', None)
+ kwargs.setdefault('copy_fn', None)
kwargs.setdefault('json_parse_type', "JSON_STRING")
Type.__init__(self, typename, **kwargs)
@@ -266,6 +276,7 @@ class KeyedUnion(Aggregate):
void = Builtin("void *", namespace = None)
bool = Builtin("bool", namespace = None,
+ copy_fn=None,
json_gen_fn = "yajl_gen_bool",
json_parse_type = "JSON_BOOL",
json_parse_fn = "libxl__bool_parse_json",
@@ -280,7 +291,7 @@ uint16 = UInt(16)
uint32 = UInt(32)
uint64 = UInt(64)
-string = Builtin("char *", namespace = None, dispose_fn = "free",
+string = Builtin("char *", namespace = None, copy_fn = "libxl_string_copy",
dispose_fn = "free",
json_gen_fn = "libxl__string_gen_json",
json_parse_type = "JSON_STRING | JSON_NULL",
json_parse_fn = "libxl__string_parse_json",
diff --git a/tools/libxl/idl.txt b/tools/libxl/idl.txt
index 484d5d7..8b54aeb 100644
--- a/tools/libxl/idl.txt
+++ b/tools/libxl/idl.txt
@@ -44,6 +44,18 @@ Type.autogenerate_dispose_fn: (default: True)
Indicates if the above named Type.dispose_fn should be
autogenerated.
+Type.copy_fn: (default: typename + "_copy" or None if type == None)
+
+ The name of the C function which will deep copy all fields within
+ this type.
+
+Type.autogenerate_copy_fn: (default: True)
+
+ Indicates if the above named Type.copy_fn should be
+ autogenerated.
+
+Type.autogenerate_copy_fn
+
Type.init_val: (default: None)
C expression for the value to initialise instances of this type to.
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index 6cf99fd..1bd4185 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -5,23 +5,29 @@
namespace("libxl_")
-libxl_defbool = Builtin("defbool", json_parse_type="JSON_STRING",
passby=PASS_BY_REFERENCE)
+libxl_defbool = Builtin("defbool", json_parse_type="JSON_STRING",
passby=PASS_BY_REFERENCE, copy_fn=None)
libxl_domid = Builtin("domid", json_gen_fn = "yajl_gen_integer", json_parse_fn
= "libxl__uint32_parse_json",
- json_parse_type = "JSON_INTEGER", autogenerate_json =
False)
+ json_parse_type = "JSON_INTEGER", autogenerate_json =
False, copy_fn=None)
libxl_devid = Builtin("devid", json_gen_fn = "yajl_gen_integer", json_parse_fn
= "libxl__int_parse_json",
- json_parse_type = "JSON_INTEGER", autogenerate_json =
False, signed = True, init_val="-1")
-libxl_uuid = Builtin("uuid", json_parse_type="JSON_STRING",
passby=PASS_BY_REFERENCE)
-libxl_mac = Builtin("mac", json_parse_type="JSON_STRING",
passby=PASS_BY_REFERENCE)
-libxl_bitmap = Builtin("bitmap", json_parse_type="JSON_ARRAY",
dispose_fn="libxl_bitmap_dispose", passby=PASS_BY_REFERENCE)
+ json_parse_type = "JSON_INTEGER", autogenerate_json =
False, signed = True, init_val="-1",
+ copy_fn=None)
+libxl_uuid = Builtin("uuid", json_parse_type="JSON_STRING",
passby=PASS_BY_REFERENCE, copy_fn="libxl_uuid_copy_ctx")
+libxl_mac = Builtin("mac", json_parse_type="JSON_STRING",
passby=PASS_BY_REFERENCE, copy_fn="libxl_mac_copy")
+libxl_bitmap = Builtin("bitmap", json_parse_type="JSON_ARRAY",
dispose_fn="libxl_bitmap_dispose",
+ copy_fn='libxl_bitmap_copy_alloc',
passby=PASS_BY_REFERENCE)
libxl_cpuid_policy_list = Builtin("cpuid_policy_list",
json_parse_type="JSON_ARRAY",
- dispose_fn="libxl_cpuid_dispose",
passby=PASS_BY_REFERENCE)
+ dispose_fn="libxl_cpuid_dispose",
passby=PASS_BY_REFERENCE,
+ copy_fn="libxl_cpuid_policy_list_copy")
libxl_string_list = Builtin("string_list", json_parse_type="JSON_ARRAY",
- dispose_fn="libxl_string_list_dispose",
passby=PASS_BY_REFERENCE)
+ dispose_fn="libxl_string_list_dispose",
passby=PASS_BY_REFERENCE,
+ copy_fn="libxl_string_list_copy")
libxl_key_value_list = Builtin("key_value_list", json_parse_type="JSON_MAP",
- dispose_fn="libxl_key_value_list_dispose",
passby=PASS_BY_REFERENCE)
-libxl_hwcap = Builtin("hwcap", json_parse_type="JSON_ARRAY",
passby=PASS_BY_REFERENCE)
+ dispose_fn="libxl_key_value_list_dispose",
passby=PASS_BY_REFERENCE,
+ copy_fn="libxl_key_value_list_copy")
+libxl_hwcap = Builtin("hwcap", json_parse_type="JSON_ARRAY",
passby=PASS_BY_REFERENCE,
+ copy_fn="libxl_hwcap_copy")
#
# Specific integer types
diff --git a/tools/libxl/libxl_types_internal.idl
b/tools/libxl/libxl_types_internal.idl
index 17533f1..800361b 100644
--- a/tools/libxl/libxl_types_internal.idl
+++ b/tools/libxl/libxl_types_internal.idl
@@ -3,7 +3,7 @@ hidden(True)
libxl_domid = Builtin("domid", namespace="libxl_", json_gen_fn =
"yajl_gen_integer",
json_parse_fn = "libxl__uint32_parse_json",
json_parse_type = "JSON_INTEGER",
- autogenerate_json = False)
+ autogenerate_json = False, copy_fn = None)
libxl__qmp_message_type = Enumeration("qmp_message_type", [
(1, "QMP"),
--
1.7.10.4
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