Move accessors into XS

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

diff --git a/xs-src/mouse_simple_accessor.xs b/xs-src/mouse_simple_accessor.xs
new file mode 100644 (file)
index 0000000..cf835fb
--- /dev/null
+++ b/xs-src/mouse_simple_accessor.xs
@@ -0,0 +1,98 @@
+#include "mouse.h"\r
+\r
+static MGVTBL mouse_simple_accessor_vtbl;
+\r\r
+/*
+static MAGIC*
+mouse_accessor_get_mg(pTHX_ CV* const xsub){
+    return moose_mg_find(aTHX_ (SV*)xsub, &mouse_simple_accessor_vtbl, MOOSEf_DIE_ON_FAIL);
+}\r
+*/\r
+\r
+CV*
+mouse_install_simple_accessor(pTHX_ const char* const fq_name, const char* const key, I32 const keylen, XSUBADDR_t const accessor_impl){
+    CV* const xsub = newXS((char*)fq_name, accessor_impl, __FILE__);
+    SV* const slot = newSVpvn_share(key, keylen, 0U);
+    MAGIC* mg;
+
+    if(!fq_name){
+        /* anonymous xsubs need sv_2mortal */
+        sv_2mortal((SV*)xsub);
+    }
+
+    mg = sv_magicext((SV*)xsub, slot, PERL_MAGIC_ext, &mouse_simple_accessor_vtbl, NULL, 0);
+    SvREFCNT_dec(slot); /* sv_magicext() increases refcnt in mg_obj */
+
+    /* NOTE:
+     * although we use MAGIC for gc, we also store slot to CvXSUBANY slot for efficiency (gfx)
+     */
+    CvXSUBANY(xsub).any_ptr = (void*)slot;
+
+    return xsub;
+}
+\r
+SV*
+mouse_accessor_get_self(pTHX_ I32 const ax, I32 const items, CV* const cv) {
+    SV* self;
+
+    if(items < 1){
+        croak("Too few arguments for %s", GvNAME(CvGV(cv)));
+    }
+
+    /* NOTE: If self has GETMAGIC, $self->accessor will invoke GETMAGIC
+     *       before calling methods, so SvGETMAGIC(self) is not necessarily needed here.
+     */
+
+    self = ST(0);
+    if(!IsObject(self)){
+        croak("Cant call %s as a class method", GvNAME(CvGV(cv)));
+    }
+    return self;
+}\r
+
+
+XS(mouse_xs_simple_reader)
+{
+    dVAR; dXSARGS;\r
+    dMOUSE_self;
+    SV* const slot = (SV*)XSANY.any_ptr;
+    SV* value;
+
+    if (items != 1) {
+        croak("Expected exactly one argument");
+    }
+
+    value = mouse_instance_get_slot(self, slot);
+    ST(0) = value ? value : &PL_sv_undef;
+    XSRETURN(1);
+}
+
+
+XS(mouse_xs_simple_writer)
+{
+    dVAR; dXSARGS;
+    dMOUSE_self;
+    SV* const slot = (SV*)XSANY.any_ptr;
+\r
+    if (items != 2) {
+        croak("Expected exactly two argument");
+    }
+
+    ST(0) = mouse_instance_set_slot(self, slot, ST(1));
+    XSRETURN(1);
+}
+
+
+XS(mouse_xs_simple_predicate)
+{
+    dVAR; dXSARGS;
+    dMOUSE_self;
+    SV* const slot = (SV*)XSANY.any_ptr;
+\r
+    if (items != 1) {
+        croak("Expected exactly one argument");
+    }
+
+    ST(0) = boolSV( mouse_instance_has_slot(self, slot) );
+    XSRETURN(1);
+}\r