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Add support for pointers to shared_ptr and null shared_ptr in Ruby containers

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Upcasting of pointers to shared_ptr would need some more fundamental
changes, but not done yet ... pointers to shared_ptr are not common.
This commit is contained in:
William S Fulton 2017-04-12 19:08:23 +01:00
commit 83a389d3fb
3 changed files with 160 additions and 32 deletions
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85
Lib/ruby/std_shared_ptr.i
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@ -7,23 +7,32 @@
{
namespace swig {
/*
template specialization for functions defined in rubystdcommon.swg.
here we should treat smart pointers in a way different from the way we treat raw pointers.
Template specialization for functions defined in rubystdcommon.swg. Special handling for shared_ptr
is required as, shared_ptr<T> * is used rather than the usual T *, see shared_ptr.i.
*/
template <class Type>
struct traits_asptr<std::shared_ptr<Type> > {
static int asptr(VALUE obj, std::shared_ptr<Type> **val) {
std::shared_ptr<Type> *p=0;
std::shared_ptr<Type> *p = 0;
swig_type_info *descriptor = type_info<std::shared_ptr<Type> >();
swig_ruby_owntype newmem = {0, 0};
int res = descriptor ? SWIG_ConvertPtrAndOwn(obj, (void **)&p, descriptor, 0, &newmem) : SWIG_ERROR;
if (SWIG_IsOK(res) && p) {
if (val && *val) **val = *p;
if (newmem.own & SWIG_CAST_NEW_MEMORY) delete p;
return SWIG_OK;
} else {
return SWIG_ERROR;
if (SWIG_IsOK(res)) {
if (val) {
if (*val) {
**val = p ? *p : std::shared_ptr<Type>();
} else {
*val = p;
if (newmem.own & SWIG_CAST_NEW_MEMORY) {
// Upcast for pointers to shared_ptr in this generic framework has not been implemented
res = SWIG_ERROR;
}
}
}
if (newmem.own & SWIG_CAST_NEW_MEMORY)
delete p;
}
return res;
}
};
@ -31,12 +40,13 @@ namespace swig {
struct traits_asval<std::shared_ptr<Type> > {
static int asval(VALUE obj, std::shared_ptr<Type> *val) {
if (val) {
std::shared_ptr<Type> ret;
std::shared_ptr<Type> *p=&ret;
std::shared_ptr<Type> ret;
std::shared_ptr<Type> *p = &ret;
int res = traits_asptr<std::shared_ptr<Type> >::asptr(obj, &p);
if (!SWIG_IsOK(res)) return res;
if (val) *val = ret;
return SWIG_OK;
if (!SWIG_IsOK(res))
return res;
*val = ret;
return SWIG_OK;
} else {
return traits_asptr<std::shared_ptr<Type> >::asptr(obj, (std::shared_ptr<Type> **)(0));
}
@ -44,17 +54,24 @@ namespace swig {
};
template <class Type>
struct traits_asval<std::shared_ptr<Type>*> {
struct traits_asval<std::shared_ptr<Type> *> {
static int asval(VALUE obj, std::shared_ptr<Type> **val) {
if (val && *val) {
typedef typename noconst_traits<std::shared_ptr<Type> >::noconst_type noconst_type;
noconst_type ret;
noconst_type *p = &ret;
int res = traits_asptr<noconst_type>::asptr(obj, &p);
if (SWIG_IsOK(res)) {
**(const_cast<noconst_type**>(val)) = ret;
if (val) {
typedef typename noconst_traits<std::shared_ptr<Type> >::noconst_type noconst_type;
if (*val) {
noconst_type ret;
noconst_type *p = &ret;
int res = traits_asptr<noconst_type>::asptr(obj, &p);
if (SWIG_IsOK(res))
**(const_cast<noconst_type**>(val)) = ret;
return res;
} else {
noconst_type *p = 0;
int res = traits_asptr<noconst_type>::asptr(obj, &p);
if (SWIG_IsOK(res))
*val = p;
return res;
}
return res;
} else {
return traits_asptr<std::shared_ptr<Type> >::asptr(obj, (std::shared_ptr<Type> **)(0));
}
@ -73,16 +90,32 @@ namespace swig {
// Uninitialized return value, no Type() constructor required.
if (throw_error) throw std::invalid_argument("bad type");
VALUE lastErr = rb_gv_get("$!");
if (lastErr == Qnil) {
if (lastErr == Qnil)
SWIG_Error(SWIG_TypeError, swig::type_name<std::shared_ptr<Type> >());
}
static std::shared_ptr<Type> *v_def = (std::shared_ptr<Type>*) malloc(sizeof(std::shared_ptr<Type>));
static std::shared_ptr<Type> *v_def = (std::shared_ptr<Type> *) malloc(sizeof(std::shared_ptr<Type>));
memset(v_def,0,sizeof(std::shared_ptr<Type>));
return *v_def;
}
}
};
template <class Type>
struct traits_as<std::shared_ptr<Type> *, pointer_category> {
static std::shared_ptr<Type> * as(VALUE obj, bool throw_error) {
std::shared_ptr<Type> *p = 0;
int res = traits_asptr<std::shared_ptr<Type> >::asptr(obj, &p);
if (SWIG_IsOK(res)) {
return p;
} else {
if (throw_error) throw std::invalid_argument("bad type");
VALUE lastErr = rb_gv_get("$!");
if (lastErr == Qnil)
SWIG_Error(SWIG_TypeError, swig::type_name<std::shared_ptr<Type> *>());
return 0;
}
}
};
/*
we have to remove the const qualifier to work around a BUG
SWIG_TypeQuery("std::shared_ptr<const Type>") == NULL,