diff options
Diffstat (limited to 'examples/usercmodule/cppexample')
| -rw-r--r-- | examples/usercmodule/cppexample/example.cpp | 17 | ||||
| -rw-r--r-- | examples/usercmodule/cppexample/examplemodule.c | 25 | ||||
| -rw-r--r-- | examples/usercmodule/cppexample/examplemodule.h | 5 | ||||
| -rw-r--r-- | examples/usercmodule/cppexample/micropython.mk | 12 |
4 files changed, 59 insertions, 0 deletions
diff --git a/examples/usercmodule/cppexample/example.cpp b/examples/usercmodule/cppexample/example.cpp new file mode 100644 index 0000000000..06809732a4 --- /dev/null +++ b/examples/usercmodule/cppexample/example.cpp @@ -0,0 +1,17 @@ +extern "C" { +#include <examplemodule.h> + +// Here we implement the function using C++ code, but since it's +// declaration has to be compatible with C everything goes in extern "C" scope. +mp_obj_t cppfunc(mp_obj_t a_obj, mp_obj_t b_obj) { + // Prove we have (at least) C++11 features. + const auto a = mp_obj_get_int(a_obj); + const auto b = mp_obj_get_int(b_obj); + const auto sum = [&]() { + return mp_obj_new_int(a + b); + } (); + // Prove we're being scanned for QSTRs. + mp_obj_t tup[] = {sum, MP_ROM_QSTR(MP_QSTR_hellocpp)}; + return mp_obj_new_tuple(2, tup); +} +} diff --git a/examples/usercmodule/cppexample/examplemodule.c b/examples/usercmodule/cppexample/examplemodule.c new file mode 100644 index 0000000000..ceb588bef6 --- /dev/null +++ b/examples/usercmodule/cppexample/examplemodule.c @@ -0,0 +1,25 @@ +#include <examplemodule.h> + +// Define a Python reference to the function we'll make available. +// See example.cpp for the definition. +STATIC MP_DEFINE_CONST_FUN_OBJ_2(cppfunc_obj, cppfunc); + +// Define all properties of the module. +// Table entries are key/value pairs of the attribute name (a string) +// and the MicroPython object reference. +// All identifiers and strings are written as MP_QSTR_xxx and will be +// optimized to word-sized integers by the build system (interned strings). +STATIC const mp_rom_map_elem_t cppexample_module_globals_table[] = { + { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_cppexample) }, + { MP_ROM_QSTR(MP_QSTR_cppfunc), MP_ROM_PTR(&cppfunc_obj) }, +}; +STATIC MP_DEFINE_CONST_DICT(cppexample_module_globals, cppexample_module_globals_table); + +// Define module object. +const mp_obj_module_t cppexample_user_cmodule = { + .base = { &mp_type_module }, + .globals = (mp_obj_dict_t *)&cppexample_module_globals, +}; + +// Register the module to make it available in Python. +MP_REGISTER_MODULE(MP_QSTR_cppexample, cppexample_user_cmodule, MODULE_CPPEXAMPLE_ENABLED); diff --git a/examples/usercmodule/cppexample/examplemodule.h b/examples/usercmodule/cppexample/examplemodule.h new file mode 100644 index 0000000000..d89384a630 --- /dev/null +++ b/examples/usercmodule/cppexample/examplemodule.h @@ -0,0 +1,5 @@ +// Include MicroPython API. +#include "py/runtime.h" + +// Declare the function we'll make available in Python as cppexample.cppfunc(). +extern mp_obj_t cppfunc(mp_obj_t a_obj, mp_obj_t b_obj); diff --git a/examples/usercmodule/cppexample/micropython.mk b/examples/usercmodule/cppexample/micropython.mk new file mode 100644 index 0000000000..e10d965a00 --- /dev/null +++ b/examples/usercmodule/cppexample/micropython.mk @@ -0,0 +1,12 @@ +CPPEXAMPLE_MOD_DIR := $(USERMOD_DIR) + +# Add our source files to the respective variables. +SRC_USERMOD += $(CPPEXAMPLE_MOD_DIR)/examplemodule.c +SRC_USERMOD_CXX += $(CPPEXAMPLE_MOD_DIR)/example.cpp + +# Add our module directory to the include path. +CFLAGS_USERMOD += -I$(CPPEXAMPLE_MOD_DIR) +CXXFLAGS_USERMOD += -I$(CPPEXAMPLE_MOD_DIR) + +# We use C++ features so have to link against the standard library. +LDFLAGS_USERMOD += -lstdc++ |