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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [RESEND PATCH 1/2] tools/libxl: Mark pointer args of many functions constant
Anything *_is_empty(), *_is_default(), or *_gen_json() is going to be
examining the pointed to thing, not modifying it. This potentially
results in higher-performance output. This also allows spreading
constants further, allowing more checking and security.
Signed-off-by: Elliott Mitchell <ehem+xen@xxxxxxx>
---
tools/include/libxl_json.h | 22 ++++++++++++----------
tools/libs/light/gentypes.py | 8 ++++----
tools/libs/light/libxl_cpuid.c | 2 +-
tools/libs/light/libxl_internal.c | 4 ++--
tools/libs/light/libxl_internal.h | 18 +++++++++---------
tools/libs/light/libxl_json.c | 18 ++++++++++--------
tools/libs/light/libxl_nocpuid.c | 4 ++--
7 files changed, 40 insertions(+), 36 deletions(-)
diff --git a/tools/include/libxl_json.h b/tools/include/libxl_json.h
index 260783bfde..63f0e58fe1 100644
--- a/tools/include/libxl_json.h
+++ b/tools/include/libxl_json.h
@@ -23,17 +23,19 @@
#endif
yajl_gen_status libxl__uint64_gen_json(yajl_gen hand, uint64_t val);
-yajl_gen_status libxl_defbool_gen_json(yajl_gen hand, libxl_defbool *p);
-yajl_gen_status libxl_uuid_gen_json(yajl_gen hand, libxl_uuid *p);
-yajl_gen_status libxl_mac_gen_json(yajl_gen hand, libxl_mac *p);
-yajl_gen_status libxl_bitmap_gen_json(yajl_gen hand, libxl_bitmap *p);
+yajl_gen_status libxl_defbool_gen_json(yajl_gen hand, const libxl_defbool *p);
+yajl_gen_status libxl_uuid_gen_json(yajl_gen hand, const libxl_uuid *p);
+yajl_gen_status libxl_mac_gen_json(yajl_gen hand, const libxl_mac *p);
+yajl_gen_status libxl_bitmap_gen_json(yajl_gen hand, const libxl_bitmap *p);
yajl_gen_status libxl_cpuid_policy_list_gen_json(yajl_gen hand,
- libxl_cpuid_policy_list *p);
-yajl_gen_status libxl_string_list_gen_json(yajl_gen hand, libxl_string_list
*p);
+ const libxl_cpuid_policy_list
*p);
+yajl_gen_status libxl_string_list_gen_json(yajl_gen hand,
+ const libxl_string_list *p);
yajl_gen_status libxl_key_value_list_gen_json(yajl_gen hand,
- libxl_key_value_list *p);
-yajl_gen_status libxl_hwcap_gen_json(yajl_gen hand, libxl_hwcap *p);
-yajl_gen_status libxl_ms_vm_genid_gen_json(yajl_gen hand, libxl_ms_vm_genid
*p);
+ const libxl_key_value_list *p);
+yajl_gen_status libxl_hwcap_gen_json(yajl_gen hand, const libxl_hwcap *p);
+yajl_gen_status libxl_ms_vm_genid_gen_json(yajl_gen hand,
+ const libxl_ms_vm_genid *p);
#include <_libxl_types_json.h>
@@ -91,6 +93,6 @@ static inline yajl_gen libxl_yajl_gen_alloc(const
yajl_alloc_funcs *allocFuncs)
#endif /* !HAVE_YAJL_V2 */
yajl_gen_status libxl_domain_config_gen_json(yajl_gen hand,
- libxl_domain_config *p);
+ const libxl_domain_config *p);
#endif /* LIBXL_JSON_H */
diff --git a/tools/libs/light/gentypes.py b/tools/libs/light/gentypes.py
index 9a45e45acc..7e02a5366f 100644
--- a/tools/libs/light/gentypes.py
+++ b/tools/libs/light/gentypes.py
@@ -632,7 +632,7 @@ if __name__ == '__main__':
ty.make_arg("p"),
ku.keyvar.type.make_arg(ku.keyvar.name)))
if ty.json_gen_fn is not None:
- f.write("%schar *%s_to_json(libxl_ctx *ctx, %s);\n" %
(ty.hidden(), ty.typename, ty.make_arg("p")))
+ f.write("%schar *%s_to_json(libxl_ctx *ctx, const %s);\n" %
(ty.hidden(), ty.typename, ty.make_arg("p")))
if ty.json_parse_fn is not None:
f.write("%sint %s_from_json(libxl_ctx *ctx, %s, const char *s);\n"
% (ty.hidden(), ty.typename, ty.make_arg("p", passby=idl.PASS_BY_REFERENCE)))
if isinstance(ty, idl.Enumeration):
@@ -662,7 +662,7 @@ if __name__ == '__main__':
""" % (header_json_define, header_json_define, " ".join(sys.argv)))
for ty in [ty for ty in types if ty.json_gen_fn is not None]:
- f.write("%syajl_gen_status %s_gen_json(yajl_gen hand, %s);\n" %
(ty.hidden(), ty.typename, ty.make_arg("p", passby=idl.PASS_BY_REFERENCE)))
+ f.write("%syajl_gen_status %s_gen_json(yajl_gen hand, const %s);\n" %
(ty.hidden(), ty.typename, ty.make_arg("p", passby=idl.PASS_BY_REFERENCE)))
f.write("\n")
f.write("""#endif /* %s */\n""" % header_json_define)
@@ -766,13 +766,13 @@ if __name__ == '__main__':
f.write("\n")
for ty in [t for t in types if t.json_gen_fn is not None]:
- f.write("yajl_gen_status %s_gen_json(yajl_gen hand, %s)\n" %
(ty.typename, ty.make_arg("p", passby=idl.PASS_BY_REFERENCE)))
+ f.write("yajl_gen_status %s_gen_json(yajl_gen hand, const %s)\n" %
(ty.typename, ty.make_arg("p", passby=idl.PASS_BY_REFERENCE)))
f.write("{\n")
f.write(libxl_C_type_gen_json(ty, "p"))
f.write("}\n")
f.write("\n")
- f.write("char *%s_to_json(libxl_ctx *ctx, %s)\n" % (ty.typename,
ty.make_arg("p")))
+ f.write("char *%s_to_json(libxl_ctx *ctx, const %s)\n" % (ty.typename,
ty.make_arg("p")))
f.write("{\n")
f.write(libxl_C_type_to_json(ty, "p"))
f.write("}\n")
diff --git a/tools/libs/light/libxl_cpuid.c b/tools/libs/light/libxl_cpuid.c
index 289c59c742..b3e4212edf 100644
--- a/tools/libs/light/libxl_cpuid.c
+++ b/tools/libs/light/libxl_cpuid.c
@@ -14,7 +14,7 @@
#include "libxl_internal.h"
-int libxl__cpuid_policy_is_empty(libxl_cpuid_policy_list *pl)
+int libxl__cpuid_policy_is_empty(const libxl_cpuid_policy_list *pl)
{
return !libxl_cpuid_policy_list_length(pl);
}
diff --git a/tools/libs/light/libxl_internal.c
b/tools/libs/light/libxl_internal.c
index d93a75533f..32b8788b59 100644
--- a/tools/libs/light/libxl_internal.c
+++ b/tools/libs/light/libxl_internal.c
@@ -332,7 +332,7 @@ _hidden int libxl__parse_mac(const char *s, libxl_mac mac)
return 0;
}
-_hidden int libxl__compare_macs(libxl_mac *a, libxl_mac *b)
+_hidden int libxl__compare_macs(const libxl_mac *a, const libxl_mac *b)
{
int i;
@@ -344,7 +344,7 @@ _hidden int libxl__compare_macs(libxl_mac *a, libxl_mac *b)
return 0;
}
-_hidden int libxl__mac_is_default(libxl_mac *mac)
+_hidden int libxl__mac_is_default(const libxl_mac *mac)
{
return (!(*mac)[0] && !(*mac)[1] && !(*mac)[2] &&
!(*mac)[3] && !(*mac)[4] && !(*mac)[5]);
diff --git a/tools/libs/light/libxl_internal.h
b/tools/libs/light/libxl_internal.h
index 028bc013d9..e3df881d08 100644
--- a/tools/libs/light/libxl_internal.h
+++ b/tools/libs/light/libxl_internal.h
@@ -2073,9 +2073,9 @@ struct libxl__xen_console_reader {
/* parse the string @s as a sequence of 6 colon separated bytes in to @mac */
_hidden int libxl__parse_mac(const char *s, libxl_mac mac);
/* compare mac address @a and @b. 0 if the same, -ve if a<b and +ve if a>b */
-_hidden int libxl__compare_macs(libxl_mac *a, libxl_mac *b);
+_hidden int libxl__compare_macs(const libxl_mac *a, const libxl_mac *b);
/* return true if mac address is all zero (the default value) */
-_hidden int libxl__mac_is_default(libxl_mac *mac);
+_hidden int libxl__mac_is_default(const libxl_mac *mac);
/* init a recursive mutex */
_hidden int libxl__init_recursive_mutex(libxl_ctx *ctx, pthread_mutex_t *lock);
@@ -4571,7 +4571,7 @@ _hidden int libxl__ms_vm_genid_set(libxl__gc *gc,
uint32_t domid,
#define LIBXL__DEFBOOL_STR_DEFAULT "<default>"
#define LIBXL__DEFBOOL_STR_FALSE "False"
#define LIBXL__DEFBOOL_STR_TRUE "True"
-static inline int libxl__defbool_is_default(libxl_defbool *db)
+static inline int libxl__defbool_is_default(const libxl_defbool *db)
{
return !db->val;
}
@@ -4666,22 +4666,22 @@ int libxl__random_bytes(libxl__gc *gc, uint8_t *buf,
size_t len);
#include "_libxl_types_internal_private.h"
/* This always return false, there's no "default value" for hw cap */
-static inline int libxl__hwcap_is_default(libxl_hwcap *hwcap)
+static inline int libxl__hwcap_is_default(const libxl_hwcap *hwcap)
{
return 0;
}
-static inline int libxl__string_list_is_empty(libxl_string_list *psl)
+static inline int libxl__string_list_is_empty(const libxl_string_list *psl)
{
return !libxl_string_list_length(psl);
}
-static inline int libxl__key_value_list_is_empty(libxl_key_value_list *pkvl)
+static inline int libxl__key_value_list_is_empty(const libxl_key_value_list
*pkvl)
{
return !libxl_key_value_list_length(pkvl);
}
-int libxl__cpuid_policy_is_empty(libxl_cpuid_policy_list *pl);
+int libxl__cpuid_policy_is_empty(const libxl_cpuid_policy_list *pl);
/* Portability note: a proper flock(2) implementation is required */
typedef struct {
@@ -4812,12 +4812,12 @@ void* libxl__device_list(libxl__gc *gc, const
libxl__device_type *dt,
void libxl__device_list_free(const libxl__device_type *dt,
void *list, int num);
-static inline bool libxl__timer_mode_is_default(libxl_timer_mode *tm)
+static inline bool libxl__timer_mode_is_default(const libxl_timer_mode *tm)
{
return *tm == LIBXL_TIMER_MODE_DEFAULT;
}
-static inline bool libxl__string_is_default(char **s)
+static inline bool libxl__string_is_default(char *const *s)
{
return *s == NULL;
}
diff --git a/tools/libs/light/libxl_json.c b/tools/libs/light/libxl_json.c
index 9b8ef2cab9..88e81f9905 100644
--- a/tools/libs/light/libxl_json.c
+++ b/tools/libs/light/libxl_json.c
@@ -95,7 +95,7 @@ yajl_gen_status libxl__yajl_gen_enum(yajl_gen hand, const
char *str)
* YAJL generators for builtin libxl types.
*/
yajl_gen_status libxl_defbool_gen_json(yajl_gen hand,
- libxl_defbool *db)
+ const libxl_defbool *db)
{
return libxl__yajl_gen_asciiz(hand, libxl_defbool_to_string(*db));
}
@@ -137,7 +137,7 @@ int libxl__bool_parse_json(libxl__gc *gc, const
libxl__json_object *o,
}
yajl_gen_status libxl_uuid_gen_json(yajl_gen hand,
- libxl_uuid *uuid)
+ const libxl_uuid *uuid)
{
char buf[LIBXL_UUID_FMTLEN+1];
snprintf(buf, sizeof(buf), LIBXL_UUID_FMT, LIBXL_UUID_BYTES((*uuid)));
@@ -154,7 +154,7 @@ int libxl__uuid_parse_json(libxl__gc *gc, const
libxl__json_object *o,
}
yajl_gen_status libxl_bitmap_gen_json(yajl_gen hand,
- libxl_bitmap *bitmap)
+ const libxl_bitmap *bitmap)
{
yajl_gen_status s;
int i;
@@ -208,7 +208,7 @@ int libxl__bitmap_parse_json(libxl__gc *gc, const
libxl__json_object *o,
}
yajl_gen_status libxl_key_value_list_gen_json(yajl_gen hand,
- libxl_key_value_list *pkvl)
+ const libxl_key_value_list *pkvl)
{
libxl_key_value_list kvl = *pkvl;
yajl_gen_status s;
@@ -269,7 +269,8 @@ int libxl__key_value_list_parse_json(libxl__gc *gc, const
libxl__json_object *o,
return 0;
}
-yajl_gen_status libxl_string_list_gen_json(yajl_gen hand, libxl_string_list
*pl)
+yajl_gen_status libxl_string_list_gen_json(yajl_gen hand,
+ const libxl_string_list *pl)
{
libxl_string_list l = *pl;
yajl_gen_status s;
@@ -322,7 +323,7 @@ int libxl__string_list_parse_json(libxl__gc *gc, const
libxl__json_object *o,
return 0;
}
-yajl_gen_status libxl_mac_gen_json(yajl_gen hand, libxl_mac *mac)
+yajl_gen_status libxl_mac_gen_json(yajl_gen hand, const libxl_mac *mac)
{
char buf[LIBXL_MAC_FMTLEN+1];
snprintf(buf, sizeof(buf), LIBXL_MAC_FMT, LIBXL_MAC_BYTES((*mac)));
@@ -339,7 +340,7 @@ int libxl__mac_parse_json(libxl__gc *gc, const
libxl__json_object *o,
}
yajl_gen_status libxl_hwcap_gen_json(yajl_gen hand,
- libxl_hwcap *p)
+ const libxl_hwcap *p)
{
yajl_gen_status s;
int i;
@@ -377,7 +378,8 @@ int libxl__hwcap_parse_json(libxl__gc *gc, const
libxl__json_object *o,
return 0;
}
-yajl_gen_status libxl_ms_vm_genid_gen_json(yajl_gen hand, libxl_ms_vm_genid *p)
+yajl_gen_status libxl_ms_vm_genid_gen_json(yajl_gen hand,
+ const libxl_ms_vm_genid *p)
{
yajl_gen_status s;
int i;
diff --git a/tools/libs/light/libxl_nocpuid.c b/tools/libs/light/libxl_nocpuid.c
index f47336565b..73580351b3 100644
--- a/tools/libs/light/libxl_nocpuid.c
+++ b/tools/libs/light/libxl_nocpuid.c
@@ -14,7 +14,7 @@
#include "libxl_internal.h"
-int libxl__cpuid_policy_is_empty(libxl_cpuid_policy_list *pl)
+int libxl__cpuid_policy_is_empty(const libxl_cpuid_policy_list *pl)
{
return 1;
}
@@ -40,7 +40,7 @@ void libxl__cpuid_legacy(libxl_ctx *ctx, uint32_t domid, bool
restore,
}
yajl_gen_status libxl_cpuid_policy_list_gen_json(yajl_gen hand,
- libxl_cpuid_policy_list *pcpuid)
+ const libxl_cpuid_policy_list *pcpuid)
{
return 0;
}
--
--
(\___(\___(\______ --=> 8-) EHM <=-- ______/)___/)___/)
\BS ( | ehem+sigmsg@xxxxxxx PGP 87145445 | ) /
\_CS\ | _____ -O #include <stddisclaimer.h> O- _____ | / _/
8A19\___\_|_/58D2 7E3D DDF4 7BA6 <-PGP-> 41D1 B375 37D0 8714\_|_/___/5445
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