/
nci-ffi.pmc.in
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nci-ffi.pmc.in
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/*
Copyright (C) 2001-2010, Parrot Foundation.
$Id$
=head1 NAME
src/pmc/nci.pmc - Native Call Interface
=head1 DESCRIPTION
The vtable functions for the native C call functions.
=head2 Methods
=over 4
=cut
*/
/* Cheat with this include, for whatever reason the space is required */
# include "ffi.h"
/* HEADERIZER HFILE: none */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
PARROT_IGNORABLE_RESULT
static nci_thunk_t /*@alt void@*/
build_func(PARROT_INTERP,
ARGMOD(Parrot_NCI_attributes *nci_info))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*nci_info);
static void pcc_params(PARROT_INTERP,
ARGIN(STRING *sig),
ARGMOD(Parrot_NCI_attributes *nci_info),
size_t sig_length)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*nci_info);
#define ASSERT_ARGS_build_func __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(nci_info))
#define ASSERT_ARGS_pcc_params __attribute__unused__ int _ASSERT_ARGS_CHECK = (\
PARROT_ASSERT_ARG(interp) \
, PARROT_ASSERT_ARG(sig) \
, PARROT_ASSERT_ARG(nci_info))
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
static
INTVAL
parse_sig(PARROT_INTERP, STRING *sig, size_t sig_length, Parrot_NCI_attributes *nci_info);
static
size_t
parse_return(PARROT_INTERP, STRING* sig, size_t sig_length,
Parrot_NCI_attributes * nci_info, ffi_type **return_type);
static
size_t
parse_args(PARROT_INTERP, STRING* sig, size_t start, size_t sig_length,
Parrot_NCI_attributes *nci_info, ffi_type ***arg_types);
static
size_t
parse_identifier(PARROT_INTERP,
STRING* sig, size_t start, size_t end,
ffi_type** sig_obj,
char* pmc_type, size_t *pmc_count,
char* translation, size_t *translation_length);
static
size_t
parse_structure(PARROT_INTERP, STRING* sig, size_t start, size_t end,
ffi_type** sig_obj, char* pmc_type);
static
INTVAL
parse_prefix(INTVAL c);
static
size_t
structure_length(PARROT_INTERP, STRING* sig, size_t start, size_t end);
static
size_t
count_args(PARROT_INTERP, STRING* sig, size_t start, size_t end);
static
size_t
find_matching(PARROT_INTERP, STRING* sig, size_t start, size_t sig_length,
INTVAL start_character, INTVAL end_character);
#define IS_DIGIT(x) (((x) == '0') || ((x) == '1') || ((x) == '2') || ((x) == '3') \
|| ((x) == '4') || ((x) == '5') || ((x) == '6') || ((x) == '7') \
|| ((x) == '8') || ((x) == '9'))
#define IS_PREFIX(x) (((x) == '*') || ((x) == 'u'))
#define IS_OLD_TYPE(x) (((x) == 'P') || ((x) == 'J') || ((x) == 'N') || ((x) == 'S') \
|| ((x) == 'O') || ((x) == '@') || ((x) == 'B') || ((x) == 'p') \
|| ((x) == '2') || ((x) == '3') || ((x) == '4') || ((x) == 'U') \
|| ((x) == 'V'))
#define IS_TYPE(x) (((x) == 'i') || ((x) == 'v') || ((x) == 'l') || ((x) == 't') \
|| ((x) == 'c') || ((x) == 'b') || ((x) == 'f') || ((x) == 'd') \
|| ((x) == 's') || IS_OLD_TYPE(x))
#define IS_POSTFIX(x) ((x) == '{') /* || IS_DIGIT(x)) */
#define IS_INFIX(x) ((x) == '|')
#define IS_START_CIRCUMFIX(x) ((x) == '(')
#define IS_END_CIRCUMFIX(x) ((x) == ')')
#define IS_NOT_END_CIRCUMFIX(x) ((x) != ')')
#define PREFIX_POINTER (1<<0)
#define PREFIX_SIGNED ( 0)
#define PREFIX_UNSIGNED (1<<1)
#define PREFIX_NATIVE (1<<2)
typedef struct pmc_holder_t {
PMC* p;
union {
INTVAL* ival;
void** pval;
};
} pmc_holder_t;
/*
=item C<static INTVAL parse_sig(PARROT_INTERP, STRING *sig,
size_t sig_length, Parrot_NCI_attributes *nci_info)>
Parse a full signature. All signatures should contain a return type and a list of
arguments. "vv" Would be the shortest "void fn(void)" signature you can legally make.
See C<parse_return> and C<parse_args> to see how the signature is broken down.
=cut
*/
static INTVAL
parse_sig(PARROT_INTERP, STRING *sig, size_t sig_length, Parrot_NCI_attributes *nci_info) {
ffi_cif cif;
ffi_type *return_type;
ffi_type **arg_types;
if (sig_length) {
size_t i = parse_return(interp, sig, sig_length, nci_info, &return_type);
if (i < sig_length)
parse_args(interp, sig, i, sig_length, nci_info, &arg_types);
else {
arg_types = mem_internal_allocate_n_zeroed_typed(1, ffi_type*);
arg_types[0] = &ffi_type_void;
nci_info->pcc_params_signature = string_make(interp, "", 1, NULL, 0);
nci_info->arg_translation = NULL;
nci_info->arity = 0;
}
}
else {
arg_types = mem_internal_allocate_n_zeroed_typed(1, ffi_type*);
arg_types[0] = &ffi_type_void;
return_type = &ffi_type_void;
nci_info->pcc_params_signature = string_make(interp, "", 1, NULL, 0);
nci_info->arg_translation = NULL;
nci_info->arity = 0;
}
if (ffi_prep_cif(&cif, FFI_DEFAULT_ABI,
nci_info->arity, return_type, arg_types) == FFI_OK) {
nci_info->cif = (void*)mem_internal_allocate_typed(ffi_cif);
memcpy(nci_info->cif, &cif, sizeof (ffi_cif));
nci_info->arg_types = arg_types;
return 1;
}
if (arg_types) {
mem_sys_free(arg_types);
}
/* TODO: Throw Error here. */
printf("Bad signature\n");
return 0;
}
/*
=item C<static size_t parse_return(PARROT_INTERP, STRING *sig, size_t sig_length,
Parrot_NCI_attributes* nci_info, ffi_type **return_type)>
Parses the return type. This assumes the first identifier is the return type.
See C<parse_identifier> to see how a single identifer is parsed.
=cut
*/
static size_t
parse_return(PARROT_INTERP, STRING *sig, size_t sig_length,
Parrot_NCI_attributes* nci_info, ffi_type **return_type) {
char *t = mem_allocate_n_zeroed_typed(2, char);
size_t j = 0, k = 0;
/* Should be 1 character plus a NULL" */
char * result_sig = mem_allocate_n_zeroed_typed(2, char);
size_t result_length = parse_identifier(interp,
sig, 0, sig_length,
return_type,
result_sig, &j,
t, &k);
nci_info->pcc_return_signature = string_make(interp, result_sig, 2, NULL, 0);
nci_info->return_translation = (void*)t;
mem_sys_free(result_sig);
return result_length;
}
/*
=item C<static size_t parse_args(PARROT_INTERP, STRING* sig, size_t start, size_t sig_length,
Parrot_NCI_attributes *nci_info, ffi_type ***arg_types)>
Parses the signatures arguments. It takes an offset to know where to start looking.
This should fill out a list of C<ffi_type*> args.
See C<parse_identifier> to see how a single identifer is parsed.
=cut
*/
static size_t
parse_args(PARROT_INTERP, STRING* sig, size_t start, size_t sig_length,
Parrot_NCI_attributes *nci_info, ffi_type ***arg_types) {
size_t i = start;
size_t arg_count = 0;
size_t argc = count_args(interp, sig, start, sig_length);
char* parrot_types = mem_allocate_n_zeroed_typed(argc + 1, char);
size_t parrot_types_length = 0;
char* translation_types = mem_allocate_n_zeroed_typed(argc + 1, char);
size_t translation_length = 0;
*arg_types = mem_internal_allocate_n_zeroed_typed(argc + 1, ffi_type*);
while (i < sig_length) {
ffi_type *ident;
i = parse_identifier(interp,
sig, i, sig_length,
&ident,
parrot_types, &parrot_types_length,
translation_types, &translation_length);
(*arg_types)[arg_count] = ident;
arg_count++;
}
nci_info->pcc_params_signature = string_make(interp, parrot_types,
strlen(parrot_types), NULL, 0);
nci_info->arg_translation = translation_types;
nci_info->arity = arg_count;
mem_sys_free(parrot_types);
return i;
}
/*
=item C<static size_t parse_identifier(PARROT_INTERP, STRING *sig, size_t start,
size_t sig_length, ffi_type **type_obj,
char **type, size_t *pmc_count,
char **translation, size_t *translation_count)>
Parse an identifier and build its representation used for PCC and any translations
that are needed.
An example of a transation is "t", it will take a STRING* and convert it to a
char* for the function call.
=cut
*/
static size_t
parse_identifier(PARROT_INTERP,
STRING *sig, size_t start, size_t sig_length,
ffi_type **type_obj,
char *type, size_t *pmc_count,
char *translation, size_t *translation_count) {
size_t i = start;
INTVAL done = 0;
while (!done && i < sig_length) {
INTVAL c = Parrot_str_indexed(interp, sig, i);
int prefix = 0;
while (IS_PREFIX(c)) {
prefix |= parse_prefix(c);
i++;
if (i < sig_length)
c = Parrot_str_indexed(interp, sig, i);
else
return i;
}
if (IS_START_CIRCUMFIX(c)) {
i = parse_structure(interp, sig, i + 1, sig_length, type_obj, type);
i++;
if (i < sig_length)
c = Parrot_str_indexed(interp, sig, i);
else
return i;
}
else if (IS_TYPE(c)) {
if (prefix & PREFIX_POINTER) {
*type_obj = &ffi_type_pointer;
continue;
}
translation[(*translation_count)++] = ' ';
switch (c) {
case (INTVAL)' ':
case (INTVAL)'0': /* null ptr or such - doesn't consume a reg */
break;
case (INTVAL)'c':
translation[(*translation_count) - 1] = 'c';
type[(*pmc_count)++] = 'I';
if (prefix & PREFIX_UNSIGNED) {
*type_obj = &ffi_type_uchar;
}
else {
*type_obj = &ffi_type_schar;
}
break;
case (INTVAL)'B':
translation[(*translation_count) - 1] = 'B';
type[(*pmc_count)++] = 'S';
*type_obj = &ffi_type_pointer;
break;
case (INTVAL)'b':
translation[(*translation_count) - 1] = 'b';
type[(*pmc_count)++] = 'S';
*type_obj = &ffi_type_pointer;
break;
case (INTVAL)'s':
translation[(*translation_count) - 1] = 's';
type[(*pmc_count)++] = 'I';
if (prefix & PREFIX_UNSIGNED) {
*type_obj = &ffi_type_ushort;
}
else {
*type_obj = &ffi_type_sshort;
}
break;
case (INTVAL)'I': /* INTVAL */
case (INTVAL)'i':
translation[(*translation_count) - 1] = 'i';
type[(*pmc_count)++] = 'I';
if (prefix & PREFIX_UNSIGNED) {
*type_obj = &ffi_type_uint;
}
else {
*type_obj = &ffi_type_sint;
}
break;
case (INTVAL)'l':
translation[(*translation_count) - 1] = 'l';
type[(*pmc_count)++] = 'I';
if (prefix & PREFIX_UNSIGNED) {
*type_obj = &ffi_type_ulong;
}
else {
*type_obj = &ffi_type_slong;
}
break;
case (INTVAL)'q':
translation[(*translation_count) - 1] = 'q';
type[(*pmc_count)++] = 'I';
if (prefix & PREFIX_UNSIGNED) {
*type_obj = &ffi_type_uint64;
}
else {
*type_obj = &ffi_type_sint64;
}
break;
case (INTVAL)'J': /* interpreter */
translation[(*translation_count) - 1] = 'J';
*type_obj = &ffi_type_pointer;
break;
case (INTVAL)'p': /* push pmc->data */
translation[(*translation_count) - 1] = 'p';
type[(*pmc_count)++] = 'P';
*type_obj = &ffi_type_pointer;
break;
case (INTVAL)'2':
translation[(*translation_count) - 1] = '2';
type[(*pmc_count)++] = 'P';
*type_obj = &ffi_type_pointer;
break;
case (INTVAL)'3':
translation[(*translation_count) - 1] = '3';
type[(*pmc_count)++] = 'P';
*type_obj = &ffi_type_pointer;
break;
case (INTVAL)'4':
translation[(*translation_count) - 1] = '4';
type[(*pmc_count)++] = 'P';
*type_obj = &ffi_type_pointer;
break;
case (INTVAL)'P': /* push PMC * */
translation[(*translation_count) - 1] = 'P';
type[(*pmc_count)++] = 'P';
*type_obj = &ffi_type_pointer;
break;
case (INTVAL)'V': /* push PMC * */
translation[(*translation_count) - 1] = 'V';
type[(*pmc_count)++] = 'P';
*type_obj = &ffi_type_pointer;
break;
case (INTVAL)'S':
type[(*pmc_count)++] = 'S';
*type_obj = &ffi_type_pointer;
case (INTVAL)'t':
translation[(*translation_count) - 1] = 't';
type[(*pmc_count)++] = 'S';
*type_obj = &ffi_type_pointer;
break;
case (INTVAL)'v':
type[(*pmc_count)++] = 'v';
*type_obj = &ffi_type_void;
break;
#if (DOUBLE_SIZE == 4) /* FLOATVAL is a float */
case (INTVAL)'N':
#endif
case (INTVAL)'f':
translation[(*translation_count) - 1] = 'f';
type[(*pmc_count)++] = 'N';
*type_obj = &ffi_type_float;
break;
#if (DOUBLE_SIZE == 8) /* FLOATVAL is a double */
case (INTVAL)'N':
#endif
case (INTVAL)'d':
translation[(*translation_count) - 1] = 'd';
type[(*pmc_count)++] = 'N';
*type_obj = &ffi_type_double;
break;
#if (DOUBLE_SIZE > 8) /* FLOATVAL is a long double */
case (INTVAL)'N':
#endif
case (INTVAL)'D':
translation[(*translation_count) - 1] = 'D';
type[(*pmc_count)++] = 'N';
*type_obj = &ffi_type_longdouble;
break;
case (INTVAL)'O': /* push PMC * invocant */
*type_obj = &ffi_type_pointer;
type[(*pmc_count)++] = 'P';
type[(*pmc_count)++] = 'i';
break;
case (INTVAL)'@': /* push PMC * slurpy */
*type_obj = &ffi_type_pointer;
type[(*pmc_count)++] = 'P';
type[(*pmc_count)++] = 's';
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_JIT_ERROR,
"Unknown param Signature %c\n", (char)c);
break;
}
i++;
if (i < sig_length)
c = Parrot_str_indexed(interp, sig, i);
else
return i;
}
else {
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_JIT_ERROR,
"Unknown param Signature %c\n", (char)c);
}
/*
* Parse postfix ops
* TODO: Parse postfix ops, currently I skip them.
*/
while (IS_POSTFIX(c)) {
i++;
if (i < sig_length)
c = Parrot_str_indexed(interp, sig, i);
else
return i;
}
if ((i < sig_length) && (c == (INTVAL)'|')) {
/* Its a union, parse it special. */
}
else {
done = 1;
}
}
return i;
}
/*
=item C<static INTVAL parse_prefix(INTVAL c)>
Parse a prefix character.
=cut
*/
static INTVAL
parse_prefix(INTVAL c) {
switch (c) {
case '*':
return PREFIX_POINTER;
break;
case 'u':
return PREFIX_UNSIGNED;
break;
default:
return 0;
break;
}
return 0;
}
/*
=item C<static size_t parse_structure(PARROT_INTERP, STRING* sig, size_t start,
size_t sig_length, ffi_type **type_obj, char* pmc_type)>
Parses a stucture.
TODO: This should auto inflate to an UnmanagedStruct or a ManagedStruct in the future.
=cut
*/
static size_t
parse_structure(PARROT_INTERP, STRING* sig, size_t start, size_t sig_length,
ffi_type **type_obj, char* pmc_type) {
size_t i = start;
size_t struct_len = structure_length(interp, sig, start, sig_length);
size_t element_counter = 0;
INTVAL c;
*type_obj = (ffi_type*)mem_internal_allocate_typed(ffi_type*);
(*type_obj)->elements = mem_internal_allocate_n_zeroed_typed(struct_len + 1, ffi_type*);
(*type_obj)->size = (*type_obj)->alignment = 0;
(*type_obj)->type = FFI_TYPE_STRUCT;
c = Parrot_str_indexed(interp, sig, i);
while (i < sig_length && IS_NOT_END_CIRCUMFIX(c)) {
i = parse_identifier(interp, sig, i, sig_length,
&(*type_obj)->elements[element_counter],
NULL, 0, NULL, 0);
element_counter++;
c = Parrot_str_indexed(interp, sig, i);
}
(*type_obj)->elements[struct_len] = NULL;
return i;
}
/*
=item C<static size_t structure_length(PARROT_INTERP, STRING* sig,
size_t start, size_t sig_length)>
Calculates the number of items in a stucture for size purposes.
=cut
*/
static size_t
structure_length(PARROT_INTERP, STRING* sig, size_t start, size_t sig_length) {
size_t len = 0;
size_t i = start;
INTVAL depth = 0;
INTVAL c = Parrot_str_indexed(interp, sig, i);
while (i < sig_length && depth != -1) {
if (IS_START_CIRCUMFIX(c)) depth++;
else if (IS_END_CIRCUMFIX(c)) depth--;
else if (depth == 0 && (IS_TYPE(c))) len++;
i++;
c = Parrot_str_indexed(interp, sig, i);
}
return len;
}
/*
=item C<static size_t find_matching(PARROT_INTERP, STRING* sig, size_t start,
size_t sig_length, INTVAL start_character, INTVAL end_character)>
Find matching symbols, used for finding the start and stop of a stucture, it is
also recursive to handle structures inside of structures.
=cut
*/
static size_t
find_matching(PARROT_INTERP, STRING* sig, size_t start, size_t sig_length,
INTVAL start_character, INTVAL end_character) {
size_t i = start;
INTVAL c = Parrot_str_indexed(interp, sig, i);
while (i < sig_length && c != end_character) {
if (c == start_character)
i = find_matching(interp, sig, i, sig_length, start_character, end_character);
i++;
c = Parrot_str_indexed(interp, sig, i);
}
return i;
}
/*
=item C<size_t count_args(PARROT_INTERP, STRING* sig, size_t start, size_t sig_length)>
Counts the number of arguments from a given starting point. It only counts
identiers, not prefix, infix or postfix modifiers. Structures are considered as
1 item in most cases.
=cut
*/
static size_t
count_args(PARROT_INTERP, STRING* sig, size_t start, size_t sig_length) {
size_t length = 0;
size_t i = start;
while (i < sig_length) {
const INTVAL c = Parrot_str_indexed(interp, sig, i);
if (IS_START_CIRCUMFIX(c)) {
i = find_matching(interp, sig, i + 1, sig_length, '(', ')');
length++;
}
else if (IS_TYPE(c)) {
length++;
}
i++;
}
return length;
}
static void
pcc_params(PARROT_INTERP, ARGIN(STRING *sig), ARGMOD(Parrot_NCI_attributes *nci_info),
size_t sig_length)
{
ASSERT_ARGS(pcc_params)
/* NCI and PCC have a 1 to 1 mapping except an
extra char in PCC for invocant and slurpy */
size_t buf_length = sig_length + 2 + 1;
/* avoid malloc churn on common signatures */
char static_buf[16];
char * const sig_buf = sig_length <= sizeof static_buf ?
static_buf :
(char *)mem_sys_allocate(buf_length);
size_t j = 0;
size_t i;
for (i = 0; i < sig_length; ++i) {
const INTVAL c = Parrot_str_indexed(interp, sig, i);
PARROT_ASSERT(j < buf_length - 1);
switch (c) {
case (INTVAL)'0': /* null ptr or such - doesn't consume a reg */
break;
case (INTVAL)'f':
case (INTVAL)'N':
case (INTVAL)'d':
sig_buf[j++] = 'N';
break;
case (INTVAL)'I': /* INTVAL */
case (INTVAL)'l': /* long */
case (INTVAL)'i': /* int */
case (INTVAL)'s': /* short */
case (INTVAL)'c': /* char */
sig_buf[j++] = 'I';
break;
case (INTVAL)'S':
case (INTVAL)'t': /* string, pass a cstring */
sig_buf[j++] = 'S';
break;
case (INTVAL)'J': /* interpreter */
break;
case (INTVAL)'p': /* push pmc->data */
case (INTVAL)'P': /* push PMC * */
case (INTVAL)'V': /* push PMC * */
case (INTVAL)'2':
case (INTVAL)'3':
case (INTVAL)'4':
sig_buf[j++] = 'P';
break;
case (INTVAL)'v':
/* null return */
if (j == 0)
sig_buf[j++] = '\0';
break;
case (INTVAL)'O': /* push PMC * invocant */
sig_buf[j++] = 'P';
sig_buf[j++] = 'i';
break;
case (INTVAL)'@': /* push PMC * slurpy */
sig_buf[j++] = 'P';
sig_buf[j++] = 's';
break;
case (INTVAL)'b': /* buffer (void*) pass Buffer_bufstart(SReg) */
case (INTVAL)'B': /* buffer (void**) pass &Buffer_bufstart(SReg) */
sig_buf[j++] = 'S';
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_JIT_ERROR,
"Unknown param Signature %c\n", (char)c);
break;
}
}
PARROT_ASSERT(j < buf_length);
sig_buf[j++] = '\0';
nci_info->pcc_return_signature =
Parrot_str_new(interp, sig_buf, 1);
nci_info->pcc_params_signature = j ?
Parrot_str_new(interp, sig_buf + 1, j - 1) :
CONST_STRING(interp, "");
if (sig_buf != static_buf)
mem_sys_free(sig_buf);
}
PARROT_IGNORABLE_RESULT
static ffi_cif*
build_libffi_func(PARROT_INTERP, ARGMOD(Parrot_NCI_attributes *nci_info))
{
ASSERT_ARGS(build_func)
STRING * const key = nci_info->signature;
const size_t key_length = Parrot_str_byte_length(interp, key);
INTVAL r = parse_sig(interp, nci_info->signature, key_length, nci_info);
return (ffi_cif*)nci_info->cif;
}
/* actually build the NCI thunk */
PARROT_IGNORABLE_RESULT
static nci_thunk_t
build_func(PARROT_INTERP, ARGMOD(Parrot_NCI_attributes *nci_info))
{
ASSERT_ARGS(build_func)
STRING * const key = nci_info->signature;
const size_t key_length = Parrot_str_byte_length(interp, key);
pcc_params(interp, key, nci_info, key_length);
/* Arity is length of that string minus one (the return type). */
nci_info->arity = key_length - 1;
/* Build call function. */
nci_info->fb_info = build_call_func(interp, key);
nci_info->func = F2DPTR(VTABLE_get_pointer(interp, nci_info->fb_info));
return (nci_thunk_t)nci_info->func;
}
pmclass NCI auto_attrs provides invokable {
/* NCI thunk handling attributes */
/* NCI thunk handling attributes */
ATTR STRING *signature; /* The signature. */
ATTR void *func; /* Function pointer to call. */
ATTR void *orig_func;
ATTR PMC *fb_info; /* Frame-builder info */
ATTR void *cif; /* Function interface */
ATTR void *arg_types; /* Used for building the libffi call interface */
/* Parrot Sub-ish attributes */
ATTR STRING *pcc_params_signature;
ATTR STRING *pcc_return_signature;
ATTR void *arg_translation;
ATTR void *return_translation;
ATTR INTVAL arity; /* Cached arity of the NCI. */
/* MMD fields */
ATTR STRING *long_signature; /* The full signature. */
ATTR PMC *multi_sig; /* type tuple array (?) */
/*
=item C<METHOD get_multisig()>
Return the MMD signature PMC, if any or a Null PMC.
=cut
*/
METHOD get_multisig() {
PMC *sig;
GET_ATTR_multi_sig(INTERP, SELF, sig);
if (PMC_IS_NULL(sig))
sig = PMCNULL;
RETURN(PMC *sig);
}
/*
=item C<METHOD set_raw_nci_ptr(void *func)>
Sets the specified function pointer and raw flag.
=cut
*/
METHOD make_raw_nci(PMC *func) {
VTABLE_set_pointer(interp, SELF, (void *)func);
}
/*
=item C<void init()>
Initializes the NCI with a C<NULL> function pointer.
=cut
*/
VTABLE void init() {
/* Mark that we're not a raw NCI. */
PObj_flag_CLEAR(private2, SELF);
PObj_custom_mark_SET(SELF);
}
/*
=item C<void set_pointer_keyed_str(STRING *key, void *func)>
Sets the specified function pointer and signature (C<*key>).
=cut
*/
VTABLE void set_pointer(void *ptr) {
SET_ATTR_orig_func(INTERP, SELF, ptr);
PObj_flag_SET(private2, SELF);
}
VTABLE void *get_pointer() {
return PARROT_NCI(SELF)->orig_func;
}
VTABLE void set_pointer_keyed_str(STRING *key, void *func) {
Parrot_NCI_attributes * const nci_info = PARROT_NCI(SELF);
/* Store the original function and signature. */
SET_ATTR_func(INTERP, SELF, func);
/* ensure that the STRING signature is constant */
if (!PObj_constant_TEST(key)) {
char * const key_c = Parrot_str_to_cstring(INTERP, key);
const size_t key_length = Parrot_str_byte_length(interp, key);
key = string_make(interp, key_c, key_length, NULL, 0);
Parrot_str_free_cstring(key_c);
}
nci_info->signature = key;
}
/*
=item C<void mark()>
Mark any referenced strings and PMCs.
=cut
*/
VTABLE void mark() {
if (PARROT_NCI(SELF)) {
Parrot_NCI_attributes * const nci_info = PARROT_NCI(SELF);
Parrot_gc_mark_PMC_alive(interp, nci_info->fb_info);
Parrot_gc_mark_STRING_alive(interp, nci_info->signature);
Parrot_gc_mark_STRING_alive(interp, nci_info->pcc_params_signature);
Parrot_gc_mark_STRING_alive(interp, nci_info->pcc_return_signature);
Parrot_gc_mark_STRING_alive(interp, nci_info->long_signature);
Parrot_gc_mark_PMC_alive(interp, nci_info->multi_sig);
}
}
/*
=item C<void destroy()>
Free all of the memory used internally to store various things, like libffi call signatures.
=cut
*/
VTABLE void destroy() {
if (PARROT_NCI(SELF)) {
Parrot_NCI_attributes * const nci_info = PARROT_NCI(SELF);
mem_sys_free(nci_info->cif);
mem_sys_free(nci_info->arg_translation);
mem_sys_free(nci_info->arg_types);
mem_sys_free(nci_info->return_translation);
}
}
/*
=item C<PMC *clone()>
Creates and returns a clone of the NCI.
=cut
*/
VTABLE PMC *clone() {
Parrot_NCI_attributes * const nci_info_self = PARROT_NCI(SELF);
Parrot_NCI_attributes *nci_info_ret;
void *cif;
PMC * const ret = Parrot_pmc_new(INTERP, SELF->vtable->base_type);
nci_info_ret = PARROT_NCI(ret);
/* FIXME if data is malloced (JIT/i386!) then we need
* the length of data here, to memcpy it
* ManagedStruct or Buffer?
*/
nci_info_ret->func = nci_info_self->func;
nci_info_ret->fb_info = nci_info_self->fb_info;
nci_info_ret->orig_func = nci_info_self->orig_func;
nci_info_ret->cif = nci_info_self->cif;
nci_info_ret->signature = nci_info_self->signature;
nci_info_ret->pcc_params_signature = nci_info_self->pcc_params_signature;
nci_info_ret->pcc_return_signature = nci_info_self->pcc_params_signature;
nci_info_ret->arity = nci_info_self->arity;
PObj_get_FLAGS(ret) |= (PObj_get_FLAGS(SELF) & 0x7);
return ret;
}
/*
=item C<INTVAL defined()>
Returns whether the NCI is defined.
=cut
*/
VTABLE INTVAL defined() {
Parrot_NCI_attributes * const nci_info = PARROT_NCI(SELF);
return nci_info->orig_func != NULL;
}
/*
=item C<opcode_t *invoke(void *next)>