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make shared string to reference-counted C structure to reduce GC pressure

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This commit is contained in:
Yukihiro Matsumoto
2012-06-03 07:55:39 +09:00
parent 5fcd520514
commit 12d75223d6
4 changed files with 36 additions and 41 deletions
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include/mruby/string.h
+7 -8
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@@ -25,12 +25,18 @@ extern "C" {
extern const char mrb_digitmap[];
struct mrb_shared_string {
int refcnt;
char *buf;
int len;
};
struct RString {
MRUBY_OBJECT_HEADER;
int len;
union {
int capa;
struct RString *shared;
struct mrb_shared_string *shared;
} aux;
char *buf;
};
@@ -41,14 +47,7 @@ struct RString {
#define RSTRING_LEN(s) (RSTRING(s)->len)
#define RSTRING_CAPA(s) (RSTRING(s)->aux.capa)
#define RSTRING_END(s) (RSTRING(s)->buf + RSTRING(s)->len)
#define MRB_STR_SHARED 256
#define MRB_STR_SHARED_P(s) (FL_ALL(s, MRB_STR_SHARED))
#define MRB_STR_NOCAPA (MRB_STR_SHARED)
#define MRB_STR_NOCAPA_P(s) (FL_ANY(s, MRB_STR_NOCAPA))
#define MRB_STR_UNSET_NOCAPA(s) do {\
FL_UNSET(s, MRB_STR_NOCAPA);\
} while (0)
mrb_value mrb_str_literal(mrb_state*, mrb_value);
void mrb_str_concat(mrb_state*, mrb_value, mrb_value);