modjsffi.c

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2023-2024 Damien P. George
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include "emscripten.h"
#include "py/gc.h"
#include "py/objmodule.h"
#include "py/runtime.h"
#include "proxy_c.h"

#if MICROPY_PY_JSFFI

/******************************************************************************/
// jsffi module

EM_JS(void, proxy_convert_mp_to_js_then_js_to_mp_obj_jsside, (uint32_t * out), {
    const ret = proxy_convert_mp_to_js_obj_jsside(out);
    proxy_convert_js_to_mp_obj_jsside_force_double_proxy(ret, out);
});

static mp_obj_t mp_jsffi_create_proxy(mp_obj_t arg) {
    uint32_t out[3];
    proxy_convert_mp_to_js_obj_cside(arg, out);
    proxy_convert_mp_to_js_then_js_to_mp_obj_jsside(out);
    return proxy_convert_js_to_mp_obj_cside(out);
}
static MP_DEFINE_CONST_FUN_OBJ_1(mp_jsffi_create_proxy_obj, mp_jsffi_create_proxy);

EM_JS(void, proxy_convert_mp_to_js_then_js_to_js_then_js_to_mp_obj_jsside, (uint32_t * out), {
    const ret = proxy_convert_mp_to_js_obj_jsside(out);
    const js_obj = PyProxy.toJs(ret);
    proxy_convert_js_to_mp_obj_jsside(js_obj, out);
});

static mp_obj_t mp_jsffi_to_js(mp_obj_t arg) {
    uint32_t out[3];
    proxy_convert_mp_to_js_obj_cside(arg, out);
    proxy_convert_mp_to_js_then_js_to_js_then_js_to_mp_obj_jsside(out);
    return proxy_convert_js_to_mp_obj_cside(out);
}
static MP_DEFINE_CONST_FUN_OBJ_1(mp_jsffi_to_js_obj, mp_jsffi_to_js);

// *FORMAT-OFF*
EM_JS(void, js_get_proxy_js_ref_info, (uint32_t * out), {
    let used = 0;
    for (const elem of proxy_js_ref) {
        if (elem !== undefined) {
            ++used;
        }
    }
    Module.setValue(out, proxy_js_ref.length, "i32");
    Module.setValue(out + 4, used, "i32");
});
// *FORMAT-ON*

static mp_obj_t mp_jsffi_mem_info(void) {
    mp_obj_list_t *l = (mp_obj_list_t *)MP_OBJ_TO_PTR(MP_STATE_PORT(proxy_c_ref));
    mp_int_t used = 0;
    for (size_t i = 0; i < l->len; ++i) {
        if (l->items[i] != MP_OBJ_NULL) {
            ++used;
        }
    }
    uint32_t proxy_js_ref_info[2];
    js_get_proxy_js_ref_info(proxy_js_ref_info);
    gc_info_t info;
    gc_info(&info);
    mp_obj_t elems[] = {
        MP_OBJ_NEW_SMALL_INT(info.total), // GC heap total bytes
        MP_OBJ_NEW_SMALL_INT(info.used), // GC heap used bytes
        MP_OBJ_NEW_SMALL_INT(info.free), // GC heap free bytes
        MP_OBJ_NEW_SMALL_INT(l->len), // proxy_c_ref allocated size
        MP_OBJ_NEW_SMALL_INT(used), // proxy_c_ref used
        MP_OBJ_NEW_SMALL_INT(proxy_js_ref_info[0]), // proxy_js_ref allocated size
        MP_OBJ_NEW_SMALL_INT(proxy_js_ref_info[1]), // proxy_js_ref used
    };
    return mp_obj_new_tuple(MP_ARRAY_SIZE(elems), elems);
}
static MP_DEFINE_CONST_FUN_OBJ_0(mp_jsffi_mem_info_obj, mp_jsffi_mem_info);

static const mp_rom_map_elem_t mp_module_jsffi_globals_table[] = {
    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_jsffi) },

    { MP_ROM_QSTR(MP_QSTR_JsProxy), MP_ROM_PTR(&mp_type_jsproxy) },
    { MP_ROM_QSTR(MP_QSTR_JsException), MP_ROM_PTR(&mp_type_JsException) },
    { MP_ROM_QSTR(MP_QSTR_create_proxy), MP_ROM_PTR(&mp_jsffi_create_proxy_obj) },
    { MP_ROM_QSTR(MP_QSTR_to_js), MP_ROM_PTR(&mp_jsffi_to_js_obj) },
    { MP_ROM_QSTR(MP_QSTR_mem_info), MP_ROM_PTR(&mp_jsffi_mem_info_obj) },
};
static MP_DEFINE_CONST_DICT(mp_module_jsffi_globals, mp_module_jsffi_globals_table);

const mp_obj_module_t mp_module_jsffi = {
    .base = { &mp_type_module },
    .globals = (mp_obj_dict_t *)&mp_module_jsffi_globals,
};

MP_REGISTER_MODULE(MP_QSTR_jsffi, mp_module_jsffi);

#endif // MICROPY_PY_JSFFI