+ return NULL;
+}
+static void psi_ffi_struct_type_dtor(void *type) {
+ ffi_type *strct = type;
+
+ if (strct->elements) {
+ ffi_type **ptr;
+
+ for (ptr = strct->elements; *ptr; ++ptr) {
+ free(*ptr);
+ }
+ free(strct->elements);
+ }
+ free(strct);
+}
+
+static size_t psi_ffi_struct_type_pad(ffi_type **els, size_t padding) {
+ size_t i;
+
+ for (i = 0; i < padding; ++i) {
+ ffi_type *pad = malloc(sizeof(*pad));
+
+ memcpy(pad, &ffi_type_schar, sizeof(*pad));
+ *els++ = pad;
+ }
+
+ return padding;
+}
+
+static ffi_type **psi_ffi_struct_type_elements(decl_struct *strct) {
+ size_t i, argc = strct->args->count, nels = 0, offset = 0, maxalign = 0;
+ ffi_type **els = calloc(argc + 1, sizeof(*els));
+
+ for (i = 0; i < strct->args->count; ++i) {
+ decl_arg *darg = strct->args->args[i];
+ ffi_type *type = malloc(sizeof(*type));
+ size_t padding;
+
+ memcpy(type, psi_ffi_decl_arg_type(darg), sizeof(*type));
+
+ ZEND_ASSERT(type->size == darg->layout->len);
+
+ if (type->alignment > maxalign) {
+ maxalign = type->alignment;
+ }
+
+ if ((padding = psi_offset_padding(darg->layout->pos - offset, type->alignment))) {
+ if (nels + padding + 1 > argc) {
+ argc += padding;
+ els = realloc(els, (argc + 1) * sizeof(*els));
+ els[argc] = NULL;
+ }
+ psi_ffi_struct_type_pad(&els[nels], padding);
+ nels += padding;
+ offset += padding;
+ }
+ ZEND_ASSERT(offset == darg->layout->pos);
+
+ offset = (offset + darg->layout->len + type->alignment - 1) & ~(type->alignment - 1);
+ els[nels++] = type;
+ }
+
+ /* apply struct alignment padding */
+ offset = (offset + maxalign - 1) & ~(maxalign - 1);
+
+ ZEND_ASSERT(offset <= strct->size);
+ if (offset < strct->size) {
+ psi_ffi_struct_type_pad(&els[nels], strct->size - offset);
+ }
+
+ return els;