Encourage function inlining

[gitmo/Mouse.git] / xs-src / Mouse.xs

diff --git a/xs-src/Mouse.xs b/xs-src/Mouse.xs
index b8951c1..831e522 100644 (file)
--- a/xs-src/Mouse.xs
+++ b/xs-src/Mouse.xs
@@ -49,6 +49,15 @@ enum mouse_modifier_t {
 
 static MGVTBL mouse_xc_vtbl; /* for identity */
 
+HV*
+mouse_get_namespace(pTHX_ SV* const meta) {
+    SV* const package = get_slot(meta, mouse_package);
+    if(!(package && SvOK(package))){
+        croak("No package name defined for metaclass");
+    }
+    return gv_stashsv(package, GV_ADDMULTI);
+}
+
 static AV*
 mouse_calculate_all_attributes(pTHX_ SV* const metaclass) {
     SV* const avref = mcall0s(metaclass, "_calculate_all_attributes");
@@ -67,8 +76,9 @@ mouse_class_has_custom_buildargs(pTHX_ HV* const stash) {
     return buildargs && CvXSUB(GvCV(buildargs)) != XS_Mouse__Object_BUILDARGS;
 }
 
-static void
-mouse_class_update_xc(pTHX_ SV* const metaclass PERL_UNUSED_DECL, HV* const stash, AV* const xc) {
+static AV*
+mouse_class_update_xc(pTHX_ SV* const metaclass PERL_UNUSED_DECL, AV* const xc) {
+    HV* const stash          = MOUSE_xc_stash(xc);
     AV* const linearized_isa = mro_get_linear_isa(stash);
     I32 const len            = AvFILLp(linearized_isa) + 1;
     I32 i;
@@ -136,13 +146,12 @@ mouse_class_update_xc(pTHX_ SV* const metaclass PERL_UNUSED_DECL, HV* const stas
     LEAVE;
 
     sv_setuv(MOUSE_xc_gen(xc), mro_get_pkg_gen(stash));
+    return xc;
 }
 
 static AV*
-mouse_get_xc(pTHX_ SV* const metaclass) {
+mouse_get_xc_wo_check(pTHX_ SV* const metaclass) {
     AV* xc;
-    SV* gen;
-    HV* stash;
     MAGIC* mg;
 
     if(!IsObject(metaclass)){
@@ -151,21 +160,18 @@ mouse_get_xc(pTHX_ SV* const metaclass) {
 
     mg = mouse_mg_find(aTHX_ SvRV(metaclass), &mouse_xc_vtbl, 0x00);
     if(!mg){
-        SV* const package = get_slot(metaclass, mouse_package);
-        STRLEN len;
-        const char* const pv = SvPV_const(package, len);
-
-        stash = gv_stashpvn(pv, len, TRUE);
+        /* cache stash for performance */
+        HV* const stash = mouse_get_namespace(aTHX_ metaclass);
         xc    = newAV();
 
-        mg = sv_magicext(SvRV(metaclass), (SV*)xc, PERL_MAGIC_ext, &mouse_xc_vtbl, pv, len);
+        mg = sv_magicext(SvRV(metaclass), (SV*)xc, PERL_MAGIC_ext,
+            &mouse_xc_vtbl, NULL, 0);
         SvREFCNT_dec(xc); /* refcnt++ in sv_magicext */
 
         av_extend(xc, MOUSE_XC_last - 1);
 
         av_store(xc, MOUSE_XC_GEN, newSVuv(0U));
         av_store(xc, MOUSE_XC_STASH, (SV*)stash);
-
         SvREFCNT_inc_simple_void_NN(stash);
     }
     else{
@@ -174,20 +180,33 @@ mouse_get_xc(pTHX_ SV* const metaclass) {
         assert(xc);
         assert(SvTYPE(xc) == SVt_PVAV);
     }
+    return xc;
+}
 
-    gen   = MOUSE_xc_gen(xc);
-
-    if(SvUVX(gen) != 0U && MOUSE_xc_flags(xc) & MOUSEf_XC_IS_IMMUTABLE){
-        return xc;
+static int
+mouse_xc_is_fresh(pTHX_ AV* const xc) {
+    HV* const stash = MOUSE_xc_stash(xc);
+    SV* const gen   = MOUSE_xc_gen(xc);
+    if(SvUVX(gen) != 0U && MOUSE_xc_flags(xc) & MOUSEf_XC_IS_IMMUTABLE) {
+        return TRUE;
     }
+    return SvUVX(gen) == mro_get_pkg_gen(stash);
+}
 
-    stash = MOUSE_xc_stash(xc);
-
-    if(SvUVX(gen) != mro_get_pkg_gen(stash)){
-        mouse_class_update_xc(aTHX_ metaclass, stash, xc);
-    }
+STATIC_INLINE AV*
+mouse_get_xc(pTHX_ SV* const metaclass) {
+    AV* const xc = mouse_get_xc_wo_check(aTHX_ metaclass);
+    return mouse_xc_is_fresh(aTHX_ xc)
+        ? xc
+        : mouse_class_update_xc(aTHX_ metaclass, xc);
+}
 
-    return xc;
+static AV*
+mouse_get_xc_if_fresh(pTHX_ SV* const metaclass) {
+    AV* const xc = mouse_get_xc_wo_check(aTHX_ metaclass);
+    return mouse_xc_is_fresh(aTHX_ xc)
+        ? xc
+        : NULL;
 }
 
 static HV*
@@ -417,8 +436,8 @@ mouse_get_modifier_storage(pTHX_
     return (AV*)SvRV(storage_ref);
 }
 
-static void
-XS_Mouse_value_holder(pTHX_ CV* const cv PERL_UNUSED_DECL) {
+static
+XSPROTO(XS_Mouse_value_holder) {
     dVAR; dXSARGS;
     SV* const value = (SV*)XSANY.any_ptr;
     assert(value);
@@ -464,11 +483,7 @@ HV*
 namespace(SV* self)
 CODE:
 {
-    SV* const package = get_slot(self, mouse_package);
-    if(!(package && SvOK(package))){
-        croak("No package name defined");
-    }
-    RETVAL = gv_stashsv(package, GV_ADDMULTI);
+    RETVAL = mouse_get_namespace(aTHX_ self);
 }
 OUTPUT:
     RETVAL
@@ -539,14 +554,12 @@ void
 linearized_isa(SV* self)
 PPCODE:
 {
-    SV* const stash_ref = mcall0(self, mouse_namespace); /* $self->namespace */
-    AV* linearized_isa;
+    /* MOUSE_xc_stash() is not available because the xc system depends on
+       linearized_isa() */
+    HV* const stash          = mouse_get_namespace(aTHX_ self);
+    AV* const linearized_isa = mro_get_linear_isa(stash);
     I32 len;
     I32 i;
-    if(!(SvROK(stash_ref) && SvTYPE(SvRV(stash_ref)) == SVt_PVHV)){
-        croak("namespace() didn't return a HASH reference");
-    }
-    linearized_isa = mro_get_linear_isa((HV*)SvRV(stash_ref));
     len = AvFILLp(linearized_isa) + 1;
     EXTEND(SP, len);
     for(i = 0; i < len; i++){
@@ -611,6 +624,19 @@ CODE:
     mouse_class_initialize_object(aTHX_ meta, object, args, is_cloning);
 }
 
+void
+_invalidate_metaclass_cache(SV* meta)
+CODE:
+{
+    AV* const xc = mouse_get_xc_if_fresh(aTHX_ meta);
+    if(xc) {
+        SV* const gen = MOUSE_xc_gen(xc);
+        sv_setuv(gen, 0U);
+    }
+    delete_slot(meta, newSVpvs_flags("_mouse_cache_", SVs_TEMP));
+}
+
+
 MODULE = Mouse  PACKAGE = Mouse::Meta::Role
 
 BOOT:
@@ -719,17 +745,17 @@ ALIAS:
 CODE:
 {
     SV* const meta = get_metaclass(object);
+    AV* xc;
     AV* demolishall;
-    I32 len, i;
+    I32 len;
+    I32 i;
 
     if(!IsObject(object)){
         croak("You must not call %s as a class method",
             ix == 0 ? "DESTROY" : "DEMOLISHALL");
     }
 
-    if(SvOK(meta)){
-        AV* const xc = mouse_get_xc(aTHX_ meta);
-
+    if(SvOK(meta) && (xc = mouse_get_xc_if_fresh(aTHX_ meta))) {
         demolishall = MOUSE_xc_demolishall(xc);
     }
     else { /* The metaclass is already destroyed */
@@ -748,7 +774,7 @@ CODE:
         }
     }
 
-    len      = AvFILLp(demolishall) + 1;
+    len  = AvFILLp(demolishall) + 1;
     if(len > 0){
         SV* const in_global_destruction = boolSV(PL_dirty);
         SAVEI32(PL_statusvalue); /* local $? */