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py/modsys: Implement sys.modules.

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This for example will allow people to reload modules which didn't load
successfully (e.g. due to syntax error).
This commit is contained in:
Paul Sokolovsky 2015-12-05 00:09:10 +02:00
parent 5ae3ddcc9a
commit 1a1d11fa32
5 changed files with 21 additions and 8 deletions
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3
py/modsys.c
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@ -185,6 +185,9 @@ STATIC const mp_rom_map_elem_t mp_module_sys_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR_stderr), MP_ROM_PTR(&mp_sys_stderr_obj) },
#endif
#if MICROPY_PY_SYS_MODULES
{ MP_OBJ_NEW_QSTR(MP_QSTR_modules), MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_loaded_modules_dict)) },
#endif
#if MICROPY_PY_SYS_EXC_INFO
{ MP_ROM_QSTR(MP_QSTR_exc_info), MP_ROM_PTR(&mp_sys_exc_info_obj) },
#endif

5
py/mpconfig.h
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@ -704,6 +704,11 @@ typedef double mp_float_t;
#define MICROPY_PY_SYS_MAXSIZE (0)
#endif
// Whether to provide "sys.modules" dictionary
#ifndef MICROPY_PY_SYS_MODULES
#define MICROPY_PY_SYS_MODULES (1)
#endif
// Whether to provide "sys.exc_info" function
// Avoid enabling this, this function is Python2 heritage
#ifndef MICROPY_PY_SYS_EXC_INFO

5
py/mpstate.h
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@ -100,9 +100,8 @@ typedef struct _mp_state_vm_t {
#endif
#endif
// map with loaded modules
// TODO: expose as sys.modules
mp_map_t mp_loaded_modules_map;
// dictionary with loaded modules (may be exposed as sys.modules)
mp_obj_dict_t mp_loaded_modules_dict;
// pending exception object (MP_OBJ_NULL if not pending)
volatile mp_obj_t mp_pending_exception;

13
py/objmodule.c
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@ -95,7 +95,8 @@ const mp_obj_type_t mp_type_module = {
};
mp_obj_t mp_obj_new_module(qstr module_name) {
mp_map_elem_t *el = mp_map_lookup(&MP_STATE_VM(mp_loaded_modules_map), MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
mp_map_elem_t *el = mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
// We could error out if module already exists, but let C extensions
// add new members to existing modules.
if (el->value != MP_OBJ_NULL) {
@ -200,17 +201,18 @@ STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
STATIC MP_DEFINE_CONST_MAP(mp_builtin_module_map, mp_builtin_module_table);
void mp_module_init(void) {
mp_map_init(&MP_STATE_VM(mp_loaded_modules_map), 3);
mp_obj_dict_init(&MP_STATE_VM(mp_loaded_modules_dict), 3);
}
void mp_module_deinit(void) {
mp_map_deinit(&MP_STATE_VM(mp_loaded_modules_map));
//mp_map_deinit(&MP_STATE_VM(mp_loaded_modules_map));
}
// returns MP_OBJ_NULL if not found
mp_obj_t mp_module_get(qstr module_name) {
mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
// lookup module
mp_map_elem_t *el = mp_map_lookup(&MP_STATE_VM(mp_loaded_modules_map), MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
mp_map_elem_t *el = mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
if (el == NULL) {
// module not found, look for builtin module names
@ -236,5 +238,6 @@ mp_obj_t mp_module_get(qstr module_name) {
}
void mp_module_register(qstr qst, mp_obj_t module) {
mp_map_lookup(&MP_STATE_VM(mp_loaded_modules_map), MP_OBJ_NEW_QSTR(qst), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = module;
mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(qst), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = module;
}

3
py/qstrdefs.h
View File

@ -474,6 +474,9 @@ Q(implementation)
#if MICROPY_PY_SYS_MAXSIZE
Q(maxsize)
#endif
#if MICROPY_PY_SYS_MODULES
Q(modules)
#endif
#if MICROPY_PY_SYS_EXC_INFO
Q(exc_info)
#endif