04b9147e15
Blanket wide to all .c and .h files. Some files originating from ST are difficult to deal with (license wise) so it was left out of those. Also merged modpyb.h, modos.h, modstm.h and modtime.h in stmhal/.
434 lines
14 KiB
C
434 lines
14 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <assert.h>
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#include <string.h>
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#include <errno.h>
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#include <dlfcn.h>
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#include <ffi.h>
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#include "mpconfig.h"
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#include "nlr.h"
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#include "misc.h"
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#include "qstr.h"
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#include "obj.h"
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#include "runtime.h"
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#include "binary.h"
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/*
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* modffi uses character codes to encode a value type, based on "struct"
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* module type codes, with some extensions and overridings.
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*
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* Extra/overridden typecodes:
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* v - void, can be used only as return type
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* P - const void*, pointer to read-only memory
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* p - void*, meaning pointer to a writable memory (note that this
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* clashes with struct's "p" as "Pascal string").
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* s - as argument, the same as "p", as return value, causes string
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* to be allocated and returned, instead of pointer value.
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*
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* Note: all constraint specified by typecode can be not enforced at this time,
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* but may be later.
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*/
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typedef struct _mp_obj_opaque_t {
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mp_obj_base_t base;
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void *val;
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} mp_obj_opaque_t;
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typedef struct _mp_obj_ffimod_t {
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mp_obj_base_t base;
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void *handle;
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} mp_obj_ffimod_t;
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typedef struct _mp_obj_ffivar_t {
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mp_obj_base_t base;
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void *var;
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char type;
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// ffi_type *type;
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} mp_obj_ffivar_t;
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typedef struct _mp_obj_ffifunc_t {
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mp_obj_base_t base;
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void *func;
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char rettype;
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ffi_cif cif;
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ffi_type *params[];
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} mp_obj_ffifunc_t;
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typedef struct _mp_obj_fficallback_t {
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mp_obj_base_t base;
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void *func;
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ffi_closure *clo;
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char rettype;
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ffi_cif cif;
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ffi_type *params[];
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} mp_obj_fficallback_t;
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//STATIC const mp_obj_type_t opaque_type;
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STATIC const mp_obj_type_t ffimod_type;
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STATIC const mp_obj_type_t ffifunc_type;
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STATIC const mp_obj_type_t fficallback_type;
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STATIC const mp_obj_type_t ffivar_type;
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STATIC ffi_type *char2ffi_type(char c)
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{
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switch (c) {
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case 'b': return &ffi_type_schar;
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case 'B': return &ffi_type_uchar;
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case 'i': return &ffi_type_sint;
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case 'I': return &ffi_type_uint;
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case 'l': return &ffi_type_slong;
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case 'L': return &ffi_type_ulong;
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case 'f': return &ffi_type_float;
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case 'd': return &ffi_type_double;
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case 'P': // const void*
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case 'p': // void*
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case 's': return &ffi_type_pointer;
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case 'v': return &ffi_type_void;
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default: return NULL;
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}
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}
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STATIC ffi_type *get_ffi_type(mp_obj_t o_in)
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{
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if (MP_OBJ_IS_STR(o_in)) {
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uint len;
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const char *s = mp_obj_str_get_data(o_in, &len);
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ffi_type *t = char2ffi_type(*s);
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if (t != NULL) {
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return t;
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}
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}
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// TODO: Support actual libffi type objects
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "Unknown type"));
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}
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STATIC mp_obj_t return_ffi_value(ffi_arg val, char type)
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{
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switch (type) {
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case 's': {
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const char *s = (const char *)val;
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return mp_obj_new_str((const byte *)s, strlen(s), false);
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}
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case 'v':
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return mp_const_none;
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case 'f': {
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float *p = (float*)&val;
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return mp_obj_new_float(*p);
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}
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case 'd': {
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double *p = (double*)&val;
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return mp_obj_new_float(*p);
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}
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default:
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return mp_obj_new_int(val);
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}
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}
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// FFI module
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STATIC void ffimod_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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mp_obj_ffimod_t *self = self_in;
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print(env, "<ffimod %p>", self->handle);
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}
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STATIC mp_obj_t ffimod_close(mp_obj_t self_in) {
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mp_obj_ffimod_t *self = self_in;
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dlclose(self->handle);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(ffimod_close_obj, ffimod_close);
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STATIC mp_obj_t ffimod_func(uint n_args, const mp_obj_t *args) {
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mp_obj_ffimod_t *self = args[0];
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const char *rettype = mp_obj_str_get_str(args[1]);
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const char *symname = mp_obj_str_get_str(args[2]);
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void *sym = dlsym(self->handle, symname);
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if (sym == NULL) {
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nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT((machine_int_t)errno)));
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}
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int nparams = MP_OBJ_SMALL_INT_VALUE(mp_obj_len_maybe(args[3]));
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mp_obj_ffifunc_t *o = m_new_obj_var(mp_obj_ffifunc_t, ffi_type*, nparams);
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o->base.type = &ffifunc_type;
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o->func = sym;
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o->rettype = *rettype;
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mp_obj_t iterable = mp_getiter(args[3]);
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mp_obj_t item;
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int i = 0;
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while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
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o->params[i++] = get_ffi_type(item);
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}
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int res = ffi_prep_cif(&o->cif, FFI_DEFAULT_ABI, nparams, char2ffi_type(*rettype), o->params);
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if (res != FFI_OK) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Error in ffi_prep_cif"));
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}
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return o;
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(ffimod_func_obj, 4, 4, ffimod_func);
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STATIC void call_py_func(ffi_cif *cif, void *ret, void** args, mp_obj_t func) {
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mp_obj_t pyargs[cif->nargs];
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for (int i = 0; i < cif->nargs; i++) {
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pyargs[i] = mp_obj_new_int(*(int*)args[i]);
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}
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mp_obj_t res = mp_call_function_n_kw(func, cif->nargs, 0, pyargs);
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*(ffi_arg*)ret = mp_obj_int_get(res);
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}
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STATIC mp_obj_t mod_ffi_callback(mp_obj_t rettype_in, mp_obj_t func_in, mp_obj_t paramtypes_in) {
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const char *rettype = mp_obj_str_get_str(rettype_in);
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int nparams = MP_OBJ_SMALL_INT_VALUE(mp_obj_len_maybe(paramtypes_in));
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mp_obj_fficallback_t *o = m_new_obj_var(mp_obj_fficallback_t, ffi_type*, nparams);
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o->base.type = &fficallback_type;
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o->clo = ffi_closure_alloc(sizeof(ffi_closure), &o->func);
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o->rettype = *rettype;
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mp_obj_t iterable = mp_getiter(paramtypes_in);
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mp_obj_t item;
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int i = 0;
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while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
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o->params[i++] = get_ffi_type(item);
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}
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int res = ffi_prep_cif(&o->cif, FFI_DEFAULT_ABI, nparams, char2ffi_type(*rettype), o->params);
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if (res != FFI_OK) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "Error in ffi_prep_cif"));
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}
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res = ffi_prep_closure_loc(o->clo, &o->cif, call_py_func, func_in, o->func);
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if (res != FFI_OK) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "ffi_prep_closure_loc"));
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}
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return o;
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}
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MP_DEFINE_CONST_FUN_OBJ_3(mod_ffi_callback_obj, mod_ffi_callback);
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STATIC mp_obj_t ffimod_var(mp_obj_t self_in, mp_obj_t vartype_in, mp_obj_t symname_in) {
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mp_obj_ffimod_t *self = self_in;
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const char *rettype = mp_obj_str_get_str(vartype_in);
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const char *symname = mp_obj_str_get_str(symname_in);
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void *sym = dlsym(self->handle, symname);
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if (sym == NULL) {
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nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT((machine_int_t)errno)));
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}
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mp_obj_ffivar_t *o = m_new_obj(mp_obj_ffivar_t);
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o->base.type = &ffivar_type;
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o->var = sym;
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o->type = *rettype;
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return o;
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}
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MP_DEFINE_CONST_FUN_OBJ_3(ffimod_var_obj, ffimod_var);
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STATIC mp_obj_t ffimod_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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const char *fname = mp_obj_str_get_str(args[0]);
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void *mod = dlopen(fname, RTLD_NOW | RTLD_LOCAL);
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if (mod == NULL) {
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nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT((machine_int_t)errno)));
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}
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mp_obj_ffimod_t *o = m_new_obj(mp_obj_ffimod_t);
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o->base.type = type_in;
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o->handle = mod;
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return o;
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}
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STATIC const mp_map_elem_t ffimod_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_func), (mp_obj_t) &ffimod_func_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_var), (mp_obj_t) &ffimod_var_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_close), (mp_obj_t) &ffimod_close_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(ffimod_locals_dict, ffimod_locals_dict_table);
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STATIC const mp_obj_type_t ffimod_type = {
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{ &mp_type_type },
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.name = MP_QSTR_ffimod,
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.print = ffimod_print,
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.make_new = ffimod_make_new,
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.locals_dict = (mp_obj_t)&ffimod_locals_dict,
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};
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// FFI function
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STATIC void ffifunc_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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mp_obj_ffifunc_t *self = self_in;
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print(env, "<ffifunc %p>", self->func);
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}
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mp_obj_t ffifunc_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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mp_obj_ffifunc_t *self = self_in;
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assert(n_kw == 0);
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assert(n_args == self->cif.nargs);
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ffi_arg values[n_args];
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void *valueptrs[n_args];
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int i;
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for (i = 0; i < n_args; i++) {
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mp_obj_t a = args[i];
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if (a == mp_const_none) {
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values[i] = 0;
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} else if (MP_OBJ_IS_INT(a)) {
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values[i] = mp_obj_int_get(a);
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} else if (MP_OBJ_IS_STR(a)) {
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const char *s = mp_obj_str_get_str(a);
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values[i] = (ffi_arg)s;
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} else if (((mp_obj_base_t*)a)->type->buffer_p.get_buffer != NULL) {
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mp_obj_base_t *o = (mp_obj_base_t*)a;
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mp_buffer_info_t bufinfo;
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int ret = o->type->buffer_p.get_buffer(o, &bufinfo, MP_BUFFER_READ); // TODO: MP_BUFFER_READ?
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if (ret != 0 || bufinfo.buf == NULL) {
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goto error;
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}
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values[i] = (ffi_arg)bufinfo.buf;
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} else if (MP_OBJ_IS_TYPE(a, &fficallback_type)) {
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mp_obj_fficallback_t *p = a;
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values[i] = (ffi_arg)p->func;
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} else {
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goto error;
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}
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valueptrs[i] = &values[i];
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}
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ffi_arg retval;
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ffi_call(&self->cif, self->func, &retval, valueptrs);
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return return_ffi_value(retval, self->rettype);
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error:
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nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "Don't know how to pass object to native function"));
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}
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STATIC const mp_obj_type_t ffifunc_type = {
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{ &mp_type_type },
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.name = MP_QSTR_ffifunc,
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.print = ffifunc_print,
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.call = ffifunc_call,
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};
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// FFI callback for Python function
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STATIC void fficallback_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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mp_obj_fficallback_t *self = self_in;
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print(env, "<fficallback %p>", self->func);
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}
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STATIC const mp_obj_type_t fficallback_type = {
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{ &mp_type_type },
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.name = MP_QSTR_fficallback,
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.print = fficallback_print,
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};
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// FFI variable
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STATIC void ffivar_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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mp_obj_ffivar_t *self = self_in;
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print(env, "<ffivar @%p: 0x%x>", self->var, *(int*)self->var);
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}
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STATIC mp_obj_t ffivar_get(mp_obj_t self_in) {
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mp_obj_ffivar_t *self = self_in;
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return mp_binary_get_val_array(self->type, self->var, 0);
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}
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MP_DEFINE_CONST_FUN_OBJ_1(ffivar_get_obj, ffivar_get);
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STATIC mp_obj_t ffivar_set(mp_obj_t self_in, mp_obj_t val_in) {
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mp_obj_ffivar_t *self = self_in;
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mp_binary_set_val_array(self->type, self->var, 0, val_in);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(ffivar_set_obj, ffivar_set);
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STATIC const mp_map_elem_t ffivar_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_get), (mp_obj_t)&ffivar_get_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_set), (mp_obj_t)&ffivar_set_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(ffivar_locals_dict, ffivar_locals_dict_table);
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STATIC const mp_obj_type_t ffivar_type = {
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{ &mp_type_type },
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.name = MP_QSTR_ffivar,
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.print = ffivar_print,
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.locals_dict = (mp_obj_t)&ffivar_locals_dict,
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};
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// Generic opaque storage object (unused)
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/*
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STATIC const mp_obj_type_t opaque_type = {
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{ &mp_type_type },
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.name = MP_QSTR_opaqueval,
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// .print = opaque_print,
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};
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*/
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mp_obj_t mod_ffi_open(uint n_args, const mp_obj_t *args) {
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return ffimod_make_new((mp_obj_t)&ffimod_type, n_args, 0, args);
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_ffi_open_obj, 1, 2, mod_ffi_open);
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mp_obj_t mod_ffi_as_bytearray(mp_obj_t ptr, mp_obj_t size) {
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return mp_obj_new_bytearray_by_ref(mp_obj_int_get(size), (void*)mp_obj_int_get(ptr));
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}
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MP_DEFINE_CONST_FUN_OBJ_2(mod_ffi_as_bytearray_obj, mod_ffi_as_bytearray);
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STATIC const mp_map_elem_t mp_module_ffi_globals_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_ffi) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_open), (mp_obj_t)&mod_ffi_open_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_callback), (mp_obj_t)&mod_ffi_callback_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_as_bytearray), (mp_obj_t)&mod_ffi_as_bytearray_obj },
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};
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STATIC const mp_obj_dict_t mp_module_ffi_globals = {
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.base = {&mp_type_dict},
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.map = {
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.all_keys_are_qstrs = 1,
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.table_is_fixed_array = 1,
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.used = ARRAY_SIZE(mp_module_ffi_globals_table),
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.alloc = ARRAY_SIZE(mp_module_ffi_globals_table),
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.table = (mp_map_elem_t*)mp_module_ffi_globals_table,
|
|
},
|
|
};
|
|
|
|
const mp_obj_module_t mp_module_ffi = {
|
|
.base = { &mp_type_module },
|
|
.name = MP_QSTR_ffi,
|
|
.globals = (mp_obj_dict_t*)&mp_module_ffi_globals,
|
|
};
|