X-Git-Url: https://git.m6w6.name/?p=m6w6%2Fext-psi;a=blobdiff_plain;f=src%2Flibffi.c;h=f14a9cd651645cb380a8f65e82d795aefb49b488;hp=1741513b02df21a3d8409e441bf920a5ae9504d4;hb=fecb0372ee8e219a7ebd51406dee3e1008ccb7ec;hpb=3e2cb4103d922e025ec566e11439058d44cff872

diff --git a/src/libffi.c b/src/libffi.c
index 1741513..f14a9cd 100644
--- a/src/libffi.c
+++ b/src/libffi.c
@@ -51,6 +51,33 @@
 # endif
 #endif
 
+struct psi_ffi_context {
+	ffi_cif signature;
+	ffi_type *params[2];
+};
+
+struct psi_ffi_impl_info {
+	struct psi_context *context;
+	struct psi_call_frame *frame;
+
+	void *code;
+	ffi_closure *closure;
+};
+
+struct psi_ffi_callback_info {
+	struct psi_ffi_impl_info *impl_info;
+	struct psi_let_exp *let_exp;
+
+	void *code;
+	ffi_closure *closure;
+};
+
+struct psi_ffi_decl_info {
+	ffi_cif signature;
+	ffi_type *rv_array;
+	ffi_type *params[1];
+};
+
 static void *psi_ffi_closure_alloc(size_t s, void **code)
 {
 #ifdef PSI_HAVE_FFI_CLOSURE_ALLOC
@@ -105,114 +132,12 @@ static void psi_ffi_prep_va(ffi_cif *base, ffi_cif *signature, size_t argc, size
 	assert(FFI_OK == rc);
 }
 
-static inline ffi_type *psi_ffi_decl_arg_type(struct psi_decl_arg *darg);
-
-struct psi_ffi_context {
-	ffi_cif signature;
-	ffi_type *params[2];
-};
-
-struct psi_ffi_call {
-	struct psi_context *context;
-	union {
-		struct {
-			struct psi_impl *impl;
-			struct psi_call_frame *frame;
-		} fn;
-		struct  {
-			struct psi_let_exp *let_exp;
-			struct psi_ffi_call *impl_call;
-		} cb;
-	} impl;
-	void *code;
-	ffi_closure *closure;
-	ffi_cif signature;
-	ffi_type *params[1]; /* [type1, type2, ... ] */
-};
-
-static void psi_ffi_handler(ffi_cif *sig, void *result, void **args, void *data)
-{
-	struct psi_ffi_call *call = data;
-
-	psi_context_call(call->context, *(zend_execute_data **)args[0], *(zval **)args[1], call->impl.fn.impl);
-}
-
-static void psi_ffi_callback(ffi_cif *sig, void *result, void **args, void *data)
-{
-	struct psi_ffi_call *call = data, *impl_call = call->impl.cb.impl_call;
-
-	if (impl_call->impl.fn.frame) {
-		struct psi_call_frame_callback cbdata;
-
-		cbdata.cb = call->impl.cb.let_exp;
-		cbdata.argc = sig->nargs;
-		cbdata.argv = args;
-		cbdata.rval = result;
-
-		psi_call_frame_do_callback(impl_call->impl.fn.frame, &cbdata);
-	} else {
-		assert(0);
-	}
-}
-
-static inline ffi_abi psi_ffi_abi(const char *convention) {
-	if (FFI_LAST_ABI - 2 != FFI_FIRST_ABI) {
-#ifdef HAVE_FFI_STDCALL
-		if (!strcasecmp(convention, "stdcall")) {
-			return FFI_STDCALL;
-		}
-#endif
-#ifdef HAVE_FFI_FASTCALL
-		if (!strcasecmp(convention, "fastcall")) {
-			return FFI_FASTCALL;
-		}
+#if HAVE_INT128
+static ffi_type *ffi_type_sint128;
+static ffi_type *ffi_type_uint128;
 #endif
-	}
-	return FFI_DEFAULT_ABI;
-}
-
-static inline struct psi_ffi_call *psi_ffi_call_alloc(struct psi_context *C, struct psi_decl *decl) {
-	int rc;
-	size_t i, c = psi_plist_count(decl->args);
-	struct psi_ffi_call *call = calloc(1, sizeof(*call) + 2 * c * sizeof(void *));
-	struct psi_decl_arg *arg;
-
-	decl->info = call;
-	call->context = C;
-
-	for (i = 0; psi_plist_get(decl->args, i, &arg); ++i) {
-		call->params[i] = psi_ffi_decl_arg_type(arg);
-	}
-	call->params[c] = NULL;
 
-	rc = ffi_prep_cif(&call->signature, psi_ffi_abi(decl->abi->convention),
-			c, psi_ffi_decl_arg_type(decl->func), call->params);
-	assert(FFI_OK == rc);
-
-	return call;
-}
-
-static inline ffi_status psi_ffi_call_init_closure(struct psi_context *C, struct psi_ffi_call *call, struct psi_impl *impl) {
-	struct psi_ffi_context *context = C->context;
-
-	call->impl.fn.impl = impl;
-	return psi_ffi_prep_closure(&call->closure, &call->code, &context->signature, psi_ffi_handler, call);
-}
-
-static inline ffi_status psi_ffi_call_init_callback_closure(struct psi_context *C,
-		struct psi_ffi_call *call, struct psi_ffi_call *impl_call,
-		struct psi_let_exp *cb) {
-	call->impl.cb.let_exp = cb;
-	call->impl.cb.impl_call = impl_call;
-	return psi_ffi_prep_closure(&call->closure, &call->code, &call->signature, psi_ffi_callback, call);
-}
-
-static inline void psi_ffi_call_free(struct psi_ffi_call *call) {
-	if (call->closure) {
-		psi_ffi_closure_free(call->closure);
-	}
-	free(call);
-}
+static inline ffi_type *psi_ffi_decl_arg_type(struct psi_decl_arg *darg);
 
 static inline ffi_type *psi_ffi_token_type(token_t t) {
 	switch (t) {
@@ -237,13 +162,16 @@ static inline ffi_type *psi_ffi_token_type(token_t t) {
 		return &ffi_type_sint64;
 	case PSI_T_UINT64:
 		return &ffi_type_uint64;
+#if HAVE_INT128
+	case PSI_T_INT128:
+		return ffi_type_sint128;
+	case PSI_T_UINT128:
+		return ffi_type_uint128;
+#endif
 	case PSI_T_BOOL:
 		return &ffi_type_uchar;
-	case PSI_T_INT:
 	case PSI_T_ENUM:
 		return &ffi_type_sint;
-	case PSI_T_LONG:
-		return &ffi_type_slong;
 	case PSI_T_FLOAT:
 		return &ffi_type_float;
 	case PSI_T_DOUBLE:
@@ -272,7 +200,7 @@ static inline ffi_type *psi_ffi_impl_type(token_t impl_type) {
 	}
 	return NULL;
 }
-static void psi_ffi_struct_type_dtor(void *type) {
+static void psi_ffi_type_dtor(void *type) {
 	ffi_type *strct = type;
 
 	if (strct->elements) {
@@ -299,77 +227,100 @@ static size_t psi_ffi_struct_type_pad(ffi_type **els, size_t padding) {
 	return padding;
 }
 
-static ffi_type **psi_ffi_struct_type_elements(struct psi_decl_struct *strct) {
-	size_t i = 0, argc, nels = 0, offset = 0, maxalign = 0, last_arg_pos = -1;
-	ffi_type **tmp, **els;
-	struct psi_decl_arg *darg;
+struct psi_ffi_struct_element_storage {
+	ffi_type **els;
+	size_t nels;
+	size_t argc;
+	size_t offset;
+	size_t max_align;
+	size_t last_arg_pos;
+};
 
-	argc = psi_plist_count(strct->args);
-	els = calloc(argc + 1, sizeof(*els));
+static inline void psi_ffi_struct_type_element(
+		struct psi_ffi_struct_element_storage *s, struct psi_decl_arg *darg,
+		ffi_type *darg_type) {
 
-	while (psi_plist_get(strct->args, i++, &darg)) {
-		ffi_type *type;
-		size_t padding;
+	ffi_type *type, **tmp;
+	size_t padding;
 
-		if (darg->layout->pos == last_arg_pos) {
-			/* skip bit fields */
-			continue;
-		}
-		last_arg_pos = darg->layout->pos;
+	if (darg->layout->pos == s->last_arg_pos) {
+		/* skip bit fields */
+		return;
+	}
+	s->last_arg_pos = darg->layout->pos;
 
-		type = malloc(sizeof(*type));
-		*type = *psi_ffi_decl_arg_type(darg);
+	type = malloc(sizeof(*type));
+	*type = *darg_type;
 
-		if (type->alignment > maxalign) {
-			maxalign = type->alignment;
-		}
+	if (type->alignment > s->max_align) {
+		s->max_align = type->alignment;
+	}
 
-		assert(type->size == darg->layout->len);
-		if ((padding = psi_offset_padding(darg->layout->pos - offset, type->alignment))) {
-			if (nels + padding + 1 > argc) {
-				argc += padding;
-				tmp = realloc(els, (argc + 1) * sizeof(*els));
-				if (tmp) {
-					els = tmp;
-				} else {
-					free(els);
-					return NULL;
-				}
-				els[argc] = NULL;
+	assert(type->size <= darg->layout->len);
+	if ((padding = psi_offset_padding(darg->layout->pos - s->offset, type->alignment))) {
+		if (s->nels + padding + 1 > s->argc) {
+			s->argc += padding;
+			tmp = realloc(s->els, (s->argc + 1) * sizeof(*s->els));
+			if (tmp) {
+				s->els = tmp;
+			} else {
+				free(s->els);
+				abort();
 			}
-			psi_ffi_struct_type_pad(&els[nels], padding);
-			nels += padding;
-			offset += padding;
+			s->els[s->argc] = NULL;
 		}
-		assert(offset == darg->layout->pos);
+		psi_ffi_struct_type_pad(&s->els[s->nels], padding);
+		s->nels += padding;
+		s->offset += padding;
+	}
+	assert(s->offset == darg->layout->pos);
+
+	s->offset = (s->offset + darg->layout->len + type->alignment - 1) & ~(type->alignment - 1);
+	s->els[s->nels++] = type;
+}
 
-		offset = (offset + darg->layout->len + type->alignment - 1) & ~(type->alignment - 1);
-		els[nels++] = type;
+static ffi_type **psi_ffi_struct_type_elements(struct psi_decl_struct *strct) {
+	size_t i = 0;
+	ffi_type **tmp;
+	struct psi_decl_arg *darg;
+	struct psi_ffi_struct_element_storage s = {0};
+
+	s.last_arg_pos = -1;
+	s.argc = psi_plist_count(strct->args);
+	s.els = calloc(s.argc + 1, sizeof(*s.els));
+
+	while (psi_plist_get(strct->args, i++, &darg)) {
+		psi_ffi_struct_type_element(&s, darg, psi_ffi_decl_arg_type(darg));
 	}
 
 	/* apply struct alignment padding */
-	offset = (offset + maxalign - 1) & ~(maxalign - 1);
+	s.offset = (s.offset + s.max_align - 1) & ~(s.max_align - 1);
 
-	assert(offset <= strct->size);
-	if (offset < strct->size) {
-		size_t padding = strct->size - offset;
+	assert(s.offset <= strct->size);
+	if (s.offset < strct->size) { /* WTF? */
+		size_t padding = strct->size - s.offset;
 
-		tmp = realloc(els, (padding + argc + 1) * sizeof(*els));
+		tmp = realloc(s.els, (padding + s.argc + 1) * sizeof(*s.els));
 		if (tmp) {
-			els = tmp;
+			s.els = tmp;
 		} else {
-			free(els);
+			free(s.els);
 			return NULL;
 		}
-		psi_ffi_struct_type_pad(&els[nels], padding);
-		els[argc + padding] = NULL;
+		psi_ffi_struct_type_pad(&s.els[s.nels], padding);
+		s.els[s.argc + padding] = NULL;
 	}
 
-	return els;
+	return s.els;
 }
+
 static inline ffi_type *psi_ffi_decl_type(struct psi_decl_type *type) {
 	struct psi_decl_type *real = psi_decl_type_get_real(type);
 
+	if (real != type && type->real.def->var->pointer_level) {
+		return &ffi_type_pointer;
+	}
+
 	switch (real->type) {
 	case PSI_T_STRUCT:
 		if (!real->real.strct->engine.type) {
@@ -380,7 +331,7 @@ static inline ffi_type *psi_ffi_decl_type(struct psi_decl_type *type) {
 			strct->elements = psi_ffi_struct_type_elements(real->real.strct);
 
 			real->real.strct->engine.type = strct;
-			real->real.strct->engine.dtor = psi_ffi_struct_type_dtor;
+			real->real.strct->engine.dtor = psi_ffi_type_dtor;
 		}
 
 		return real->real.strct->engine.type;
@@ -393,9 +344,53 @@ static inline ffi_type *psi_ffi_decl_type(struct psi_decl_type *type) {
 		}
 
 	default:
-		return psi_ffi_token_type(real->type);
+		break;
 	}
+
+	return psi_ffi_token_type(real->type);
 }
+
+static inline ffi_type *psi_ffi_decl_func_array_type(struct psi_decl *fn) {
+	struct psi_ffi_decl_info *info = fn->info;
+	struct psi_ffi_struct_element_storage s = {0};
+	struct psi_layout l;
+	ffi_type *type;
+	size_t i;
+
+	if (info->rv_array) {
+		return info->rv_array;
+	}
+
+	s.last_arg_pos = -1;
+	s.argc = fn->func->var->array_size;
+	s.els = calloc(s.argc + 1, sizeof(*s.els));
+
+	info->rv_array = calloc(1, sizeof(ffi_type));
+	info->rv_array->type = FFI_TYPE_STRUCT;
+	info->rv_array->size = 0;
+	info->rv_array->elements = s.els;
+
+	l.pos = 0;
+	if (fn->func->var->pointer_level > 1) {
+		l.len = SIZEOF_VOID_P;
+		type = &ffi_type_pointer;
+	} else {
+		l.len = psi_decl_type_get_size(fn->func->type, NULL);
+		type = psi_ffi_decl_type(fn->func->type);
+	}
+
+	assert(!fn->func->layout);
+	fn->func->layout = &l;
+	for (i = 0; i < fn->func->var->array_size; ++i) {
+		psi_ffi_struct_type_element(&s, fn->func, type);
+		info->rv_array->elements = s.els;
+		l.pos += l.len;
+	}
+	fn->func->layout = NULL;
+
+	return info->rv_array;
+}
+
 static inline ffi_type *psi_ffi_decl_arg_type(struct psi_decl_arg *darg) {
 	if (darg->var->pointer_level) {
 		return &ffi_type_pointer;
@@ -404,59 +399,141 @@ static inline ffi_type *psi_ffi_decl_arg_type(struct psi_decl_arg *darg) {
 	}
 }
 
+static inline ffi_type *psi_ffi_decl_func_type(struct psi_decl *fn) {
+	struct psi_decl_arg *darg = fn->func;
 
-static inline struct psi_ffi_context *psi_ffi_context_init(struct psi_ffi_context *L) {
-	ffi_status rc;
+	if (darg->var->pointer_level) {
+		if (darg->var->array_size) {
+			/* mimic a struct resembling the array return type of fn */
+			return psi_ffi_decl_func_array_type(fn);
+		}
+		return &ffi_type_pointer;
+	} else {
+		return psi_ffi_decl_type(darg->type);
+	}
+}
 
-	if (!L) {
-		L = malloc(sizeof(*L));
+static inline ffi_abi psi_ffi_abi(const char *convention) {
+	if (FFI_LAST_ABI - 2 != FFI_FIRST_ABI) {
+#ifdef HAVE_FFI_STDCALL
+		if (!strcasecmp(convention, "stdcall")) {
+			return FFI_STDCALL;
+		}
+#endif
+#ifdef HAVE_FFI_FASTCALL
+		if (!strcasecmp(convention, "fastcall")) {
+			return FFI_FASTCALL;
+		}
+#endif
 	}
-	memset(L, 0, sizeof(*L));
+	return FFI_DEFAULT_ABI;
+}
 
-	L->params[0] = &ffi_type_pointer;
-	L->params[1] = &ffi_type_pointer;
-	rc = ffi_prep_cif(&L->signature, FFI_DEFAULT_ABI, 2, &ffi_type_void, L->params);
-	assert(rc == FFI_OK);
+static inline struct psi_ffi_decl_info *psi_ffi_decl_init(struct psi_decl *decl) {
+	if (!decl->info) {
+		int rc;
+		size_t i, c = psi_plist_count(decl->args);
+		struct psi_decl_arg *arg;
+		struct psi_ffi_decl_info *info = calloc(1, sizeof(*info) + 2 * c * sizeof(void *));
 
-	return L;
+		decl->info = info;
+
+		for (i = 0; psi_plist_get(decl->args, i, &arg); ++i) {
+			info->params[i] = psi_ffi_decl_arg_type(arg);
+		}
+		info->params[c] = NULL;
+
+		rc = ffi_prep_cif(&info->signature, psi_ffi_abi(decl->abi->convention),
+				c, psi_ffi_decl_func_type(decl), info->params);
+
+		if (FFI_OK != rc) {
+			free(info);
+			decl->info = NULL;
+		}
+	}
+
+	return decl->info;
 }
 
-static inline void psi_ffi_context_free(struct psi_ffi_context **L) {
-	if (*L) {
-		free(*L);
-		*L = NULL;
+static inline void psi_ffi_decl_dtor(struct psi_decl *decl) {
+	if (decl->info) {
+		struct psi_ffi_decl_info *info = decl->info;
+
+		if (info->rv_array) {
+			psi_ffi_type_dtor(info->rv_array);
+		}
+		free(decl->info);
+		decl->info = NULL;
 	}
 }
 
-static void psi_ffi_init(struct psi_context *C)
+static void psi_ffi_handler(ffi_cif *sig, void *result, void **args, void *data)
 {
-	C->context = psi_ffi_context_init(NULL);
+	struct psi_impl *impl = data;
+	struct psi_ffi_impl_info *info = impl->info;
+
+	psi_context_call(info->context, *(zend_execute_data **)args[0], *(zval **)args[1], impl);
+}
+
+static void psi_ffi_callback(ffi_cif *sig, void *result, void **args, void *data)
+{
+	struct psi_ffi_callback_info *cb_info = data;
+	struct psi_call_frame_callback cb_data;
+
+	assert(cb_info->impl_info->frame);
+
+	cb_data.cb = cb_info->let_exp;
+	cb_data.argc = sig->nargs;
+	cb_data.argv = args;
+	cb_data.rval = result;
+
+	psi_call_frame_do_callback(cb_info->impl_info->frame, &cb_data);
 }
 
-static inline void psi_ffi_destroy_callbacks(struct psi_context *C, struct psi_let_exp *let_exp) {
+static inline void psi_ffi_callback_init(struct psi_ffi_impl_info *impl_info,
+		struct psi_let_exp *let_exp) {
+	struct psi_ffi_callback_info *cb_info;
+	struct psi_ffi_decl_info *decl_info;
 	struct psi_let_callback *cb;
 	struct psi_let_func *fn = NULL;
+	ffi_status rc;
 
 	switch (let_exp->kind) {
 	case PSI_LET_CALLBACK:
 		cb = let_exp->data.callback;
+		if (cb->decl->info) {
+			decl_info = cb->decl->info;
+		} else {
+			decl_info = psi_ffi_decl_init(cb->decl);
+		}
 
-		if (cb->decl && cb->decl->info) {
-			psi_ffi_call_free(cb->decl->info);
+		cb_info = calloc(1, sizeof(*cb_info));
+		cb_info->impl_info = impl_info;
+		cb_info->let_exp = let_exp;
+		rc = psi_ffi_prep_closure(&cb_info->closure, &cb_info->code,
+				&decl_info->signature, psi_ffi_callback, cb_info);
+
+		if (FFI_OK != rc) {
+			free(cb_info);
+			break;
 		}
+		cb->info = cb_info;
+
+		assert(!cb->decl->sym);
+		cb->decl->sym = cb_info->code;
 		fn = cb->func;
 		/* no break */
+
 	case PSI_LET_FUNC:
 		if (!fn) {
 			fn = let_exp->data.func;
 		}
-
 		if (fn->inner) {
 			size_t i = 0;
-			struct psi_let_exp *cb;
+			struct psi_let_exp *inner_let;
 
-			while (psi_plist_get(fn->inner, i++, &cb)) {
-				psi_ffi_destroy_callbacks(C, cb);
+			while (psi_plist_get(fn->inner, i++, &inner_let)) {
+				psi_ffi_callback_init(impl_info, inner_let);
 			}
 		}
 		break;
@@ -465,51 +542,24 @@ static inline void psi_ffi_destroy_callbacks(struct psi_context *C, struct psi_l
 	}
 }
 
-static void psi_ffi_dtor(struct psi_context *C)
-{
-	if (C->decls) {
-		size_t i = 0;
-		struct psi_decl *decl;
-
-		while (psi_plist_get(C->decls, i++, &decl)) {
-			if (decl->info) {
-				psi_ffi_call_free(decl->info);
-			}
-		}
-
-	}
-	if (C->impls) {
-		size_t i = 0;
-		struct psi_impl *impl;
-
-		while (psi_plist_get(C->impls, i++, &impl)) {
-			size_t j = 0;
-			struct psi_let_stmt *let;
-
-			while (psi_plist_get(impl->stmts.let, j++, &let)) {
-				psi_ffi_destroy_callbacks(C, let->exp);
-			}
-		}
-	}
-	psi_ffi_context_free((void *) &C->context);
-}
-
-static inline void psi_ffi_compile_callbacks(struct psi_context *C,
-		struct psi_ffi_call *impl_call, struct psi_let_exp *let_exp) {
-	struct psi_ffi_call *call;
+static inline void psi_ffi_callback_dtor(struct psi_let_exp *let_exp) {
 	struct psi_let_callback *cb;
 	struct psi_let_func *fn = NULL;
 
 	switch (let_exp->kind) {
 	case PSI_LET_CALLBACK:
 		cb = let_exp->data.callback;
-		if ((call = psi_ffi_call_alloc(C, cb->decl))) {
-			if (FFI_OK != psi_ffi_call_init_callback_closure(C, call, impl_call, let_exp)) {
-				psi_ffi_call_free(call);
-				break;
-			}
 
-			cb->decl->sym = call->code;
+		psi_ffi_decl_dtor(cb->decl);
+
+		if (cb->info) {
+			struct psi_ffi_callback_info *info = cb->info;
+
+			if (info->closure) {
+				psi_ffi_closure_free(info->closure);
+			}
+			free(info);
+			cb->info = NULL;
 		}
 		fn = cb->func;
 		/* no break */
@@ -517,12 +567,13 @@ static inline void psi_ffi_compile_callbacks(struct psi_context *C,
 		if (!fn) {
 			fn = let_exp->data.func;
 		}
+
 		if (fn->inner) {
 			size_t i = 0;
-			struct psi_let_exp *inner_let;
+			struct psi_let_exp *cb;
 
-			while (psi_plist_get(fn->inner, i++, &inner_let)) {
-				psi_ffi_compile_callbacks(C, impl_call, inner_let);
+			while (psi_plist_get(fn->inner, i++, &cb)) {
+				psi_ffi_callback_dtor(cb);
 			}
 		}
 		break;
@@ -531,44 +582,214 @@ static inline void psi_ffi_compile_callbacks(struct psi_context *C,
 	}
 }
 
-static zend_function_entry *psi_ffi_compile(struct psi_context *C)
-{
-	size_t i = 0, d = 0, nf = 0;
-	struct psi_impl *impl;
-	struct psi_decl *decl;
-	zend_function_entry *zfe;
+static inline struct psi_ffi_impl_info *psi_ffi_impl_init(struct psi_impl *impl,
+		struct psi_context *C) {
+	struct psi_ffi_context *context = C->context;
+	struct psi_ffi_impl_info *info = calloc(1, sizeof(*info));
+	struct psi_let_stmt *let;
+	ffi_status rc;
+	size_t l = 0;
 
-	if (!C->impls) {
+	info->context = C;
+
+	rc = psi_ffi_prep_closure(&info->closure, &info->code,
+			&context->signature, psi_ffi_handler, impl);
+
+	if (FFI_OK != rc) {
+		free(info);
 		return NULL;
 	}
 
-	zfe = calloc(psi_plist_count(C->impls) + 1, sizeof(*zfe));
+	while (psi_plist_get(impl->stmts.let, l++, &let)) {
+		psi_ffi_callback_init(info, let->exp);
+	}
 
-	while (psi_plist_get(C->impls, i++, &impl)) {
-		size_t l = 0;
-		struct psi_let_stmt *let;
-		struct psi_ffi_call *call;
-		zend_function_entry *zf = &zfe[nf];
+	return impl->info = info;
+}
 
-		if (!impl->decl) {
-			continue;
+static inline void psi_ffi_impl_dtor(struct psi_impl *impl) {
+	struct psi_ffi_impl_info *info = impl->info;
+	struct psi_let_stmt *let;
+	size_t j = 0;
+
+	while (psi_plist_get(impl->stmts.let, j++, &let)) {
+		psi_ffi_callback_dtor(let->exp);
+	}
+
+	if (info) {
+		if (info->closure) {
+			psi_ffi_closure_free(info->closure);
 		}
-		if (!(call = psi_ffi_call_alloc(C, impl->decl))) {
-			continue;
+		free(info);
+		impl->info = NULL;
+	}
+}
+
+static void psi_ffi_extvar_get(ffi_cif *sig, void *result, void **args, void *data) {
+	struct psi_decl_extvar *evar = data;
+
+	psi_decl_extvar_get(evar, result);
+}
+
+static void psi_ffi_extvar_set(ffi_cif *sig, void *result, void **args, void *data) {
+	struct psi_decl_extvar *evar = data;
+
+	psi_decl_extvar_set(evar, args[0]);
+}
+
+struct psi_ffi_extvar_info {
+	struct {
+		ffi_cif signature;
+		void *code;
+		ffi_closure *closure;
+	} get;
+	struct {
+		ffi_cif signature;
+		ffi_type *params[1];
+		void *code;
+		ffi_closure *closure;
+	} set;
+};
+
+static inline ffi_status psi_ffi_extvar_init(struct psi_decl_extvar *evar) {
+	struct psi_ffi_extvar_info *info = calloc(1, sizeof(*info));
+	ffi_status rc;
+
+	evar->info = info;
+
+	psi_ffi_decl_init(evar->getter);
+	psi_ffi_decl_init(evar->setter);
+
+	rc = ffi_prep_cif(&info->get.signature, FFI_DEFAULT_ABI, 0,
+			psi_ffi_decl_func_type(evar->getter), NULL);
+	if (FFI_OK != rc) {
+		return rc;
+	}
+	rc = psi_ffi_prep_closure(&info->get.closure, &info->get.code,
+			&info->get.signature, psi_ffi_extvar_get, evar);
+	if (FFI_OK != rc) {
+		return rc;
+	}
+
+	info->set.params[0] = psi_ffi_decl_arg_type(evar->arg);
+	rc = ffi_prep_cif(&info->set.signature, FFI_DEFAULT_ABI, 1,
+			&ffi_type_void, info->set.params);
+	if (FFI_OK != rc) {
+		return rc;
+	}
+	rc = psi_ffi_prep_closure(&info->set.closure, &info->set.code,
+			&info->set.signature, psi_ffi_extvar_set, evar);
+	if (FFI_OK != rc) {
+		return rc;
+	}
+
+	evar->getter->sym = info->get.code;
+	evar->setter->sym = info->set.code;
+
+	return FFI_OK;
+}
+
+static inline void psi_ffi_extvar_dtor(struct psi_decl_extvar *evar) {
+	if (evar->info) {
+		free(evar->info);
+		evar->info = NULL;
+	}
+}
+
+static inline struct psi_ffi_context *psi_ffi_context_init(struct psi_ffi_context *L) {
+	ffi_status rc;
+
+	if (!L) {
+		L = malloc(sizeof(*L));
+	}
+	memset(L, 0, sizeof(*L));
+
+	L->params[0] = &ffi_type_pointer;
+	L->params[1] = &ffi_type_pointer;
+	rc = ffi_prep_cif(&L->signature, FFI_DEFAULT_ABI, 2, &ffi_type_void, L->params);
+	assert(rc == FFI_OK);
+
+	return L;
+}
+
+static inline void psi_ffi_context_free(struct psi_ffi_context **L) {
+	if (*L) {
+		free(*L);
+		*L = NULL;
+	}
+}
+
+static void psi_ffi_init(struct psi_context *C)
+{
+	C->context = psi_ffi_context_init(NULL);
+}
+
+static void psi_ffi_dtor(struct psi_context *C)
+{
+	if (C->decls) {
+		size_t i = 0;
+		struct psi_decl *decl;
+
+		while (psi_plist_get(C->decls, i++, &decl)) {
+			psi_ffi_decl_dtor(decl);
 		}
-		if (FFI_OK != psi_ffi_call_init_closure(C, call, impl)) {
-			psi_ffi_call_free(call);
-			continue;
+
+	}
+	if (C->vars) {
+		size_t i = 0;
+		struct psi_decl_extvar *evar;
+
+		while (psi_plist_get(C->vars, i++, &evar)) {
+			psi_ffi_extvar_dtor(evar);
+		}
+	}
+	if (C->impls) {
+		size_t i = 0;
+		struct psi_impl *impl;
+
+		while (psi_plist_get(C->impls, i++, &impl)) {
+			psi_ffi_impl_dtor(impl);
+		}
+	}
+	psi_ffi_context_free((void *) &C->context);
+}
+
+
+static zend_function_entry *psi_ffi_compile(struct psi_context *C)
+{
+	size_t i = 0, d = 0, v = 0, nf = 0;
+	struct psi_impl *impl;
+	struct psi_decl *decl;
+	struct psi_decl_extvar *evar;
+	zend_function_entry *zfe = NULL;
+
+	while (psi_plist_get(C->vars, v++, &evar)) {
+		if (FFI_OK == psi_ffi_extvar_init(evar)) {
+			/* */
 		}
+	}
+
+	if (C->impls) {
+		zfe = calloc(psi_plist_count(C->impls) + 1, sizeof(*zfe));
 
-		zf->fname = impl->func->name + (impl->func->name[0] == '\\');
-		zf->handler = call->code;
-		zf->num_args = psi_plist_count(impl->func->args);
-		zf->arg_info = psi_internal_arginfo(impl);
-		++nf;
+		while (psi_plist_get(C->impls, i++, &impl)) {
+			zend_function_entry *zf = &zfe[nf];
+
+			if (!impl->decl) {
+				continue;
+			}
+			if (!psi_ffi_decl_init(impl->decl)) {
+				continue;
+			}
+			if (!psi_ffi_impl_init(impl, C)) {
+				continue;
+			}
 
-		while (psi_plist_get(impl->stmts.let, l++, &let)) {
-			psi_ffi_compile_callbacks(C, call, let->exp);
+			zf->fname = impl->func->name + (impl->func->name[0] == '\\');
+			zf->handler = ((struct psi_ffi_impl_info *) impl->info)->code;
+			zf->num_args = psi_plist_count(impl->func->args);
+			zf->arg_info = psi_internal_arginfo(impl);
+			++nf;
 		}
 	}
 
@@ -577,39 +798,78 @@ static zend_function_entry *psi_ffi_compile(struct psi_context *C)
 			continue;
 		}
 
-		psi_ffi_call_alloc(C, decl);
+		psi_ffi_decl_init(decl);
 	}
 
 	return zfe;
 }
 
-static void psi_ffi_call(struct psi_context *C, struct psi_call_frame *frame, struct psi_decl *decl, void *rval, void **args) {
-	struct psi_ffi_call *info = decl->info;
-	struct psi_call_frame *prev = info->impl.fn.frame;
-
-	info->impl.fn.frame = frame;
-	ffi_call(&info->signature, FFI_FN(decl->sym), rval, args);
-	info->impl.fn.frame = prev;
+static inline void psi_ffi_call_ex(struct psi_call_frame *frame) {
+	struct psi_decl *decl = psi_call_frame_get_decl(frame);
+	struct psi_impl *impl = psi_call_frame_get_impl(frame);
+	struct psi_ffi_decl_info *decl_info = decl->info;
+	struct psi_ffi_impl_info *impl_info;
+	struct psi_call_frame *prev;
+
+	if (impl) {
+		impl_info = impl->info;
+		prev = impl_info->frame;
+		impl_info->frame = frame;
+	}
+	ffi_call(&decl_info->signature, FFI_FN(decl->sym),
+			psi_call_frame_get_rpointer(frame),
+			psi_call_frame_get_arg_pointers(frame));
+	if (impl) {
+		impl_info->frame = prev;
+	}
 }
 
-static void psi_ffi_call_va(struct psi_context *C, struct psi_call_frame *frame, struct psi_decl *decl, void *rval, void **args,
-	size_t va_count, void **va_types) {
+static inline void psi_ffi_call_va(struct psi_call_frame *frame) {
 	ffi_cif signature;
-	struct psi_ffi_call *info = decl->info;
-	struct psi_call_frame *prev = info->impl.fn.frame;
-	size_t argc = psi_plist_count(decl->args);
-	ffi_type **param_types = ecalloc(argc + va_count + 1, sizeof(ffi_type *));
-
-	memcpy(param_types, info->params, argc * sizeof(ffi_type *));
-	memcpy(param_types + argc, va_types, va_count * sizeof(ffi_type *));
-
-	psi_ffi_prep_va(&info->signature, &signature, argc, va_count, param_types);
-	info->impl.fn.frame = frame;
-	ffi_call(&signature, FFI_FN(decl->sym), rval, args);
-	info->impl.fn.frame = prev;
+	struct psi_call_frame *prev;
+	struct psi_decl *decl = psi_call_frame_get_decl(frame);
+	struct psi_impl *impl = psi_call_frame_get_impl(frame);
+	struct psi_ffi_decl_info *decl_info = decl->info;
+	struct psi_ffi_impl_info *impl_info;
+	size_t i, va_count, argc;
+	ffi_type **param_types;
+
+	argc = psi_plist_count(decl->args);
+	va_count = psi_call_frame_num_var_args(frame);
+	param_types = ecalloc(argc + va_count + 1, sizeof(ffi_type *));
+	memcpy(param_types, decl_info->params, argc * sizeof(ffi_type *));
+	for (i = 0; i < va_count; ++i) {
+		struct psi_call_frame_argument *frame_arg;
+
+		frame_arg = psi_call_frame_get_var_argument(frame, i);
+		param_types[argc + i] = psi_ffi_impl_type(frame_arg->va_type);
+	}
+
+	psi_ffi_prep_va(&decl_info->signature, &signature, argc, va_count, param_types);
+
+	if (impl) {
+		impl_info = impl->info;
+		prev = impl_info->frame;
+		impl_info->frame = frame;
+	}
+	ffi_call(&signature, FFI_FN(decl->sym),
+			psi_call_frame_get_rpointer(frame),
+			psi_call_frame_get_arg_pointers(frame));
+	if (impl) {
+		impl_info->frame = prev;
+	}
+
 	efree(param_types);
 }
 
+static void psi_ffi_call(struct psi_call_frame *frame) {
+	if (psi_call_frame_num_var_args(frame)) {
+		psi_ffi_call_va(frame);
+	} else {
+		psi_ffi_call_ex(frame);
+	}
+}
+
 static void *psi_ffi_query(struct psi_context *C, enum psi_context_query q, void *arg) {
 	switch (q) {
 	case PSI_CONTEXT_QUERY_SELF:
@@ -620,12 +880,47 @@ static void *psi_ffi_query(struct psi_context *C, enum psi_context_query q, void
 	return NULL;
 }
 
+static ZEND_RESULT_CODE psi_ffi_load()
+{
+#if HAVE_INT128
+	ffi_type *i128, *u128;
+
+	i128 = calloc(1, 3*sizeof(ffi_type));
+	i128->type = FFI_TYPE_STRUCT;
+	i128->size = 0;
+	i128->elements = (ffi_type **) (i128 + 1);
+	i128->elements[0] = &ffi_type_sint64;
+	i128->elements[1] = &ffi_type_sint64;
+
+	ffi_type_sint128 = i128;
+
+	u128 = calloc(1, 3*sizeof(ffi_type));
+	u128->type = FFI_TYPE_STRUCT;
+	u128->size = 0;
+	u128->elements = (ffi_type **) (u128 + 1);
+	u128->elements[0] = &ffi_type_uint64;
+	u128->elements[1] = &ffi_type_uint64;
+
+	ffi_type_uint128 = u128;
+#endif
+	return SUCCESS;
+}
+
+static void psi_ffi_free()
+{
+#if HAVE_INT128
+	free(ffi_type_sint128);
+	free(ffi_type_uint128);
+#endif
+}
+
 static struct psi_context_ops ops = {
+	psi_ffi_load,
+	psi_ffi_free,
 	psi_ffi_init,
 	psi_ffi_dtor,
 	psi_ffi_compile,
 	psi_ffi_call,
-	psi_ffi_call_va,
 	psi_ffi_query,
 };