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/*
Copyright (C) 2001-2008, The Perl Foundation.
$Id$
=head1 NAME
src/dynext.c - Dynamic extensions to Parrot
=head1 DESCRIPTION
=head2 Functions
=over 4
=cut
*/
#include "parrot/parrot.h"
#include "parrot/dynext.h"
#include "dynext.str"
/* HEADERIZER HFILE: include/parrot/dynext.h */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static STRING * clone_string_into(
ARGMOD(Interp *d),
ARGIN(Interp *s),
ARGIN(PMC *value))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*d);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static STRING * get_path(PARROT_INTERP,
ARGMOD(STRING *lib),
ARGOUT(void **handle),
ARGIN(STRING *wo_ext),
ARGIN_NULLOK(STRING *ext))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(*lib)
FUNC_MODIFIES(*handle);
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC* is_loaded(PARROT_INTERP, ARGIN(STRING *path))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PMC * make_string_pmc(PARROT_INTERP, ARGIN(STRING *string))
__attribute__nonnull__(1)
__attribute__nonnull__(2);
PARROT_CANNOT_RETURN_NULL
static PMC * run_init_lib(PARROT_INTERP,
ARGIN(void *handle),
ARGIN(STRING *lib_name),
ARGIN(STRING *wo_ext))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4);
static void set_cstring_prop(PARROT_INTERP,
ARGMOD(PMC *lib_pmc),
ARGIN(const char *what),
ARGIN(STRING *name))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(*lib_pmc);
static void store_lib_pmc(PARROT_INTERP,
ARGIN(PMC *lib_pmc),
ARGIN(STRING *path),
ARGIN(STRING *type),
ARGIN(STRING *lib_name))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
__attribute__nonnull__(5);
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/* _PARROTLIB is now the default */
/*#define _PARROTLIB not working: "make testr" */
/*
=item C<static void set_cstring_prop>
Set a property C<name> with value C<what> on the C<ParrotLibrary>
C<lib_pmc>.
=cut
*/
static void
set_cstring_prop(PARROT_INTERP, ARGMOD(PMC *lib_pmc), ARGIN(const char *what),
ARGIN(STRING *name))
{
STRING * const key = const_string(interp, what);
PMC * const prop = constant_pmc_new(interp, enum_class_String);
VTABLE_set_string_native(interp, prop, name);
VTABLE_setprop(interp, lib_pmc, key, prop);
}
/*
=item C<static void store_lib_pmc>
Store a C<ParrotLibrary> PMC in the interpreter's C<iglobals>.
=cut
*/
static void
store_lib_pmc(PARROT_INTERP, ARGIN(PMC *lib_pmc), ARGIN(STRING *path),
ARGIN(STRING *type), ARGIN(STRING *lib_name))
{
PMC * const iglobals = interp->iglobals;
PMC * const dyn_libs = VTABLE_get_pmc_keyed_int(interp, iglobals,
IGLOBALS_DYN_LIBS);
/* remember path/file in props */
set_cstring_prop(interp, lib_pmc, "_filename", path); /* XXX */
set_cstring_prop(interp, lib_pmc, "_type", type);
if (lib_name)
set_cstring_prop(interp, lib_pmc, "_lib_name", lib_name);
VTABLE_set_pmc_keyed_str(interp, dyn_libs, path, lib_pmc);
}
/*
=item C<static PMC* is_loaded>
Check if a C<ParrotLibrary> PMC with the filename path exists.
If it does, return it. Otherwise, return NULL.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static PMC*
is_loaded(PARROT_INTERP, ARGIN(STRING *path))
{
PMC * const iglobals = interp->iglobals;
PMC * const dyn_libs = VTABLE_get_pmc_keyed_int(interp, iglobals,
IGLOBALS_DYN_LIBS);
if (!VTABLE_exists_keyed_str(interp, dyn_libs, path))
return PMCNULL;
return VTABLE_get_pmc_keyed_str(interp, dyn_libs, path);
}
/*
=item C<static STRING * get_path>
Return path and handle of a dynamic lib, setting lib_name to just the filestem
(i.e. without path or extension) as a freshly-allocated C string.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CAN_RETURN_NULL
static STRING *
get_path(PARROT_INTERP, ARGMOD(STRING *lib), ARGOUT(void **handle),
ARGIN(STRING *wo_ext), ARGIN_NULLOK(STRING *ext))
{
STRING *path, *full_name;
const char *err = NULL; /* buffer returned from Parrot_dlerror */
PMC * const iglobals = interp->iglobals;
PMC * const lib_paths = VTABLE_get_pmc_keyed_int(interp, iglobals,
IGLOBALS_LIB_PATHS);
PMC * const share_ext = VTABLE_get_pmc_keyed_int(interp, lib_paths,
PARROT_LIB_DYN_EXTS);
if (lib == NULL) {
*handle = Parrot_dlopen((char *)NULL);
if (*handle) {
return string_from_literal(interp, "");
}
err = Parrot_dlerror();
Parrot_warn(interp, PARROT_WARNINGS_DYNEXT_FLAG,
"Couldn't dlopen(NULL): %s\n",
err ? err : "unknown reason");
return NULL;
}
/*
* first, try to add an extension to the file if it has none.
*/
if (! ext) {
const INTVAL n = VTABLE_elements(interp, share_ext);
INTVAL i;
for (i = 0; i < n; ++i) {
ext = VTABLE_get_string_keyed_int(interp, share_ext, i);
full_name = string_concat(interp, wo_ext, ext, 0);
path = Parrot_locate_runtime_file_str(interp, full_name,
PARROT_RUNTIME_FT_DYNEXT);
if (path) {
*handle = Parrot_dlopen(path->strstart);
if (*handle) {
return path;
}
err = Parrot_dlerror();
Parrot_warn(interp, PARROT_WARNINGS_DYNEXT_FLAG,
"Couldn't load '%Ss': %s\n",
full_name, err ? err : "unknown reason");
return NULL;
}
/*
* File with extension and prefix was not found,
* so try file.extension w/o prefix
*/
*handle = Parrot_dlopen(full_name->strstart);
if (*handle) {
return full_name;
}
}
}
/*
* finally, try the given file name as is. We still use
* Parrot_locate_runtime_file so that (a) relative pathnames are searched in
* the standard locations, and (b) the angle of the slashes are adjusted as
* required for non-Unix systems.
*/
full_name = Parrot_locate_runtime_file_str(interp, lib,
PARROT_RUNTIME_FT_DYNEXT);
if (full_name) {
*handle = Parrot_dlopen((char *)full_name->strstart);
if (*handle) {
return full_name;
}
}
/*
* and on windows strip a leading "lib"
* [shouldn't this happen in Parrot_locate_runtime_file instead?]
*/
#ifdef WIN32
if (!STRING_IS_EMPTY(lib) && memcmp(lib->strstart, "lib", 3) == 0) {
*handle = Parrot_dlopen((char*)lib->strstart + 3);
if (*handle) {
path = string_substr(interp, lib, 3, lib->strlen - 3, NULL, 0);
return path;
}
}
#endif
/* And on cygwin replace a leading "lib" by "cyg". */
#ifdef __CYGWIN__
if (!STRING_IS_EMPTY(lib) && memcmp(lib->strstart, "lib", 3) == 0) {
path = string_append(interp, CONST_STRING(interp, "cyg"),
string_substr(interp, lib, 3, lib->strlen - 3, NULL, 0));
*handle = Parrot_dlopen(path->strstart);
if (*handle)
return path;
}
#endif
err = Parrot_dlerror();
Parrot_warn(interp, PARROT_WARNINGS_DYNEXT_FLAG,
"Couldn't load '%Ss': %s\n",
lib, err ? err : "unknown reason");
return NULL;
}
/*
=item C<PMC * Parrot_init_lib>
Initializes a new library. First, calls C<load_func> to load the library
(if C<load_func> is provided) and then calls C<init_func>. Returns a
ParrotLibrary PMC object that represents the initialized library.
=cut
*/
PARROT_EXPORT
PARROT_CANNOT_RETURN_NULL
PMC *
Parrot_init_lib(PARROT_INTERP,
ARGIN_NULLOK(PMC *(*load_func)(PARROT_INTERP)),
ARGIN_NULLOK(void (*init_func)(PARROT_INTERP, ARGIN_NULLOK(PMC *))))
{
PMC *lib_pmc = NULL;
if (load_func)
lib_pmc = (*load_func)(interp);
/* seems to be a native/NCI lib */
if (!load_func || !lib_pmc)
lib_pmc = constant_pmc_new(interp, enum_class_ParrotLibrary);
/* Call init, if it exists */
if (init_func)
(init_func)(interp, lib_pmc);
return lib_pmc;
}
/*
=item C<static PMC * run_init_lib>
Loads and Initializes a new library and returns a ParrotLibrary PMC.
Takes the name of a library C<libname>, that is loaded with handle C<handle>.
Calls the necessary initialization routines, if any.
=cut
*/
PARROT_CANNOT_RETURN_NULL
static PMC *
run_init_lib(PARROT_INTERP, ARGIN(void *handle),
ARGIN(STRING *lib_name), ARGIN(STRING *wo_ext))
{
STRING *type;
PMC *(*load_func)(PARROT_INTERP);
void (*init_func)(PARROT_INTERP, PMC *);
char *cinit_func_name;
PMC *lib_pmc;
/*
* work around gcc 3.3.3 and other problem with dynpmcs
* something during library loading doesn't stand a DOD run
*/
Parrot_block_GC_mark(interp);
/* get load_func */
if (lib_name) {
STRING * const load_func_name = Parrot_sprintf_c(interp,
"Parrot_lib_%Ss_load", lib_name);
char * const cload_func_name = string_to_cstring(interp, load_func_name);
STRING *init_func_name;
load_func = (PMC * (*)(PARROT_INTERP))
(Parrot_dlsym(handle, cload_func_name));
string_cstring_free(cload_func_name);
/* get init_func */
init_func_name = Parrot_sprintf_c(interp, "Parrot_lib_%Ss_init",
lib_name);
cinit_func_name = string_to_cstring(interp, init_func_name);
init_func = (void (*)(PARROT_INTERP, PMC *))(Parrot_dlsym(handle,
cinit_func_name));
string_cstring_free(cinit_func_name);
}
else {
load_func = NULL;
init_func = NULL;
}
lib_pmc = Parrot_init_lib(interp, load_func, init_func);
VTABLE_set_pointer(interp, lib_pmc, handle);
if (!load_func)
type = CONST_STRING(interp, "NCI");
else {
/* we could set a private flag in the PMC header too
* but currently only ops files have struct_val set */
if (PMC_struct_val(lib_pmc))
type = CONST_STRING(interp, "Ops");
else
type = CONST_STRING(interp, "PMC");
}
/* remember lib_pmc in iglobals */
store_lib_pmc(interp, lib_pmc, wo_ext, type, lib_name);
/* UNLOCK */
Parrot_unblock_GC_mark(interp);
return lib_pmc;
}
/*
=item C<static STRING * clone_string_into>
Extracts a STRING value from PMC C<value> in interpreter C<s>. Copies that
string into the pool of interpreter C<d> using the default encoding
and charset.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static STRING *
clone_string_into(ARGMOD(Interp *d), ARGIN(Interp *s), ARGIN(PMC *value))
{
STRING * const orig = VTABLE_get_string(s, value);
char * const raw_str = string_to_cstring(s, orig);
STRING * const ret =
string_make_direct(d, raw_str, strlen(raw_str),
PARROT_DEFAULT_ENCODING, PARROT_DEFAULT_CHARSET,
PObj_constant_FLAG);
string_cstring_free(raw_str);
return ret;
}
/*
=item C<static PMC * make_string_pmc>
Converts a STRING C<string> into a String PMC.
=cut
*/
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
static PMC *
make_string_pmc(PARROT_INTERP, ARGIN(STRING *string))
{
PMC * const ret = VTABLE_new_from_string(interp,
interp->vtables[enum_class_String]->pmc_class,
string, PObj_constant_FLAG);
return ret;
}
/*
=item C<PMC * Parrot_clone_lib_into>
Clones a ParrotLibrary PMC C<lib_pmc> from interpreter C<s> into interpreter
C<d>.
=cut
*/
PARROT_EXPORT
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PMC *
Parrot_clone_lib_into(ARGMOD(Interp *d), ARGMOD(Interp *s), ARGIN(PMC *lib_pmc))
{
STRING * const wo_ext = clone_string_into(d, s,
VTABLE_getprop(s, lib_pmc, CONST_STRING(s, "_filename")));
STRING * const lib_name = clone_string_into(d, s,
VTABLE_getprop(s, lib_pmc, CONST_STRING(s, "_lib_name")));
void * const handle = PMC_data(lib_pmc);
STRING * const type =
VTABLE_get_string(s, VTABLE_getprop(s, lib_pmc, CONST_STRING(s, "_type")));
STRING * const ops = CONST_STRING(s, "Ops");
if (!string_equal(s, type, ops)) {
/* we can't clone oplibs in the normal way, since they're actually
* shared between interpreters dynop_register modifies the (statically
* allocated) op_lib_t structure from core_ops.c, for example.
* Anyways, if we hope to share bytecode at runtime, we need to have
* them have identical opcodes anyways.
*/
PMC * const new_lib_pmc = constant_pmc_new(d, enum_class_ParrotLibrary);
PMC_data(new_lib_pmc) = handle;
VTABLE_setprop(d, new_lib_pmc, CONST_STRING(s, "_filename"), make_string_pmc(d, wo_ext));
VTABLE_setprop(d, new_lib_pmc, CONST_STRING(s, "_lib_name"), make_string_pmc(d, lib_name));
VTABLE_setprop(d, new_lib_pmc, CONST_STRING(s, "_type"), make_string_pmc(d, ops));
/* fixup d->all_op_libs, if necessary */
if (d->n_libs != s->n_libs) {
INTVAL i;
if (d->all_op_libs)
d->all_op_libs = (op_lib_t **)mem_sys_realloc(d->all_op_libs,
sizeof (op_lib_t *) * s->n_libs);
else
d->all_op_libs = (op_lib_t **)mem_sys_allocate(sizeof (op_lib_t *) *
s->n_libs);
for (i = d->n_libs; i < s->n_libs; ++i)
d->all_op_libs[i] = s->all_op_libs[i];
d->n_libs = s->n_libs;
}
return new_lib_pmc;
}
else {
return run_init_lib(d, handle, lib_name, wo_ext);
}
}
/*
=item C<PMC * Parrot_load_lib>
Dynamic library loader.
C<initializer> is currently unused.
Calls C<Parrot_lib_%s_load()> which performs the registration of the lib
once C<Parrot_lib_%s_init()> gets called (if exists) to perform thread
specific setup. In both functions C<%s> is the name of the library.
If Parrot_lib_%s_load() succeeds, it should either return a
ParrotLibrary PMC, which is then used as the handle for this library
or NULL, in which case parrot creates a handle for the library.
If either Parrot_lib_%s_load() or Parrot_lib_%s_init() detects an error
condition, an exception should be thrown.
TODO: fetch Parrot_lib load/init handler exceptions
=cut
*/
PARROT_EXPORT
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PMC *
Parrot_load_lib(PARROT_INTERP, ARGIN_NULLOK(STRING *lib), SHIM(PMC *initializer))
{
void *handle;
PMC *lib_pmc;
STRING *path;
STRING *lib_name, *wo_ext, *ext; /* library stem without path
* or extension. */
/* Find the pure library name, without path or extension. */
/*
* TODO move the class_count_mutex here
*
* LOCK()
*/
if (lib) {
lib_name = parrot_split_path_ext(interp, lib, &wo_ext, &ext);
}
else {
wo_ext = string_from_literal(interp, "");
lib_name = NULL;
ext = NULL;
}
lib_pmc = is_loaded(interp, wo_ext);
if (!PMC_IS_NULL(lib_pmc)) {
/* UNLOCK() */
return lib_pmc;
}
path = get_path(interp, lib, &handle, wo_ext, ext);
if (!path || !handle) {
/*
* XXX Parrot_ex_throw_from_c_args? return PMCNULL?
* PMC Undef seems convenient, because it can be queried with get_bool()
*/
return pmc_new(interp, enum_class_Undef);
}
return run_init_lib(interp, handle, lib_name, wo_ext);
}
/*
=back
=head1 SEE ALSO
F<include/parrot/dynext.h> and F<src/pmc/parrotlibrary.pmc>.
=head1 HISTORY
Initial rev by leo 2003.08.06.
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4:
*/
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