diff options
Diffstat (limited to 'extmod/os_dupterm.c')
| -rw-r--r-- | extmod/os_dupterm.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/extmod/os_dupterm.c b/extmod/os_dupterm.c new file mode 100644 index 0000000000..cfd1c62616 --- /dev/null +++ b/extmod/os_dupterm.c @@ -0,0 +1,207 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2016 Paul Sokolovsky + * Copyright (c) 2017-2019 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 <string.h> +#include "py/mpconfig.h" + +#include "py/runtime.h" +#include "py/objtuple.h" +#include "py/objarray.h" +#include "py/stream.h" +#include "extmod/misc.h" + +#if MICROPY_PY_OS_DUPTERM + +#include "shared/runtime/interrupt_char.h" + +void mp_os_deactivate(size_t dupterm_idx, const char *msg, mp_obj_t exc) { + mp_obj_t term = MP_STATE_VM(dupterm_objs[dupterm_idx]); + MP_STATE_VM(dupterm_objs[dupterm_idx]) = MP_OBJ_NULL; + mp_printf(&mp_plat_print, msg); + if (exc != MP_OBJ_NULL) { + mp_obj_print_exception(&mp_plat_print, exc); + } + nlr_buf_t nlr; + if (nlr_push(&nlr) == 0) { + mp_stream_close(term); + nlr_pop(); + } else { + // Ignore any errors during stream closing + } +} + +uintptr_t mp_os_dupterm_poll(uintptr_t poll_flags) { + uintptr_t poll_flags_out = 0; + + for (size_t idx = 0; idx < MICROPY_PY_OS_DUPTERM; ++idx) { + mp_obj_t s = MP_STATE_VM(dupterm_objs[idx]); + if (s == MP_OBJ_NULL) { + continue; + } + + int errcode = 0; + mp_uint_t ret = 0; + const mp_stream_p_t *stream_p = mp_get_stream(s); + #if MICROPY_PY_OS_DUPTERM_BUILTIN_STREAM + if (mp_os_dupterm_is_builtin_stream(s)) { + ret = stream_p->ioctl(s, MP_STREAM_POLL, poll_flags, &errcode); + } else + #endif + { + nlr_buf_t nlr; + if (nlr_push(&nlr) == 0) { + ret = stream_p->ioctl(s, MP_STREAM_POLL, poll_flags, &errcode); + nlr_pop(); + } else { + // Ignore error with ioctl + } + } + + if (ret != MP_STREAM_ERROR) { + poll_flags_out |= ret; + if (poll_flags_out == poll_flags) { + // Finish early if all requested flags are set + break; + } + } + } + + return poll_flags_out; +} + +int mp_os_dupterm_rx_chr(void) { + for (size_t idx = 0; idx < MICROPY_PY_OS_DUPTERM; ++idx) { + if (MP_STATE_VM(dupterm_objs[idx]) == MP_OBJ_NULL) { + continue; + } + + #if MICROPY_PY_OS_DUPTERM_BUILTIN_STREAM + if (mp_os_dupterm_is_builtin_stream(MP_STATE_VM(dupterm_objs[idx]))) { + byte buf[1]; + int errcode = 0; + const mp_stream_p_t *stream_p = mp_get_stream(MP_STATE_VM(dupterm_objs[idx])); + mp_uint_t out_sz = stream_p->read(MP_STATE_VM(dupterm_objs[idx]), buf, 1, &errcode); + if (errcode == 0 && out_sz != 0) { + return buf[0]; + } else { + continue; + } + } + #endif + + nlr_buf_t nlr; + if (nlr_push(&nlr) == 0) { + byte buf[1]; + int errcode; + const mp_stream_p_t *stream_p = mp_get_stream(MP_STATE_VM(dupterm_objs[idx])); + mp_uint_t out_sz = stream_p->read(MP_STATE_VM(dupterm_objs[idx]), buf, 1, &errcode); + if (out_sz == 0) { + nlr_pop(); + mp_os_deactivate(idx, "dupterm: EOF received, deactivating\n", MP_OBJ_NULL); + } else if (out_sz == MP_STREAM_ERROR) { + // errcode is valid + if (mp_is_nonblocking_error(errcode)) { + nlr_pop(); + } else { + mp_raise_OSError(errcode); + } + } else { + // read 1 byte + nlr_pop(); + if (buf[0] == mp_interrupt_char) { + // Signal keyboard interrupt to be raised as soon as the VM resumes + mp_sched_keyboard_interrupt(); + return -2; + } + return buf[0]; + } + } else { + mp_os_deactivate(idx, "dupterm: Exception in read() method, deactivating: ", MP_OBJ_FROM_PTR(nlr.ret_val)); + } + } + + // No chars available + return -1; +} + +void mp_os_dupterm_tx_strn(const char *str, size_t len) { + for (size_t idx = 0; idx < MICROPY_PY_OS_DUPTERM; ++idx) { + if (MP_STATE_VM(dupterm_objs[idx]) == MP_OBJ_NULL) { + continue; + } + + #if MICROPY_PY_OS_DUPTERM_BUILTIN_STREAM + if (mp_os_dupterm_is_builtin_stream(MP_STATE_VM(dupterm_objs[idx]))) { + int errcode = 0; + const mp_stream_p_t *stream_p = mp_get_stream(MP_STATE_VM(dupterm_objs[idx])); + stream_p->write(MP_STATE_VM(dupterm_objs[idx]), str, len, &errcode); + continue; + } + #endif + + nlr_buf_t nlr; + if (nlr_push(&nlr) == 0) { + mp_stream_write(MP_STATE_VM(dupterm_objs[idx]), str, len, MP_STREAM_RW_WRITE); + nlr_pop(); + } else { + mp_os_deactivate(idx, "dupterm: Exception in write() method, deactivating: ", MP_OBJ_FROM_PTR(nlr.ret_val)); + } + } +} + +STATIC mp_obj_t mp_os_dupterm(size_t n_args, const mp_obj_t *args) { + mp_int_t idx = 0; + if (n_args == 2) { + idx = mp_obj_get_int(args[1]); + } + + if (idx < 0 || idx >= MICROPY_PY_OS_DUPTERM) { + mp_raise_ValueError(MP_ERROR_TEXT("invalid dupterm index")); + } + + mp_obj_t previous_obj = MP_STATE_VM(dupterm_objs[idx]); + if (previous_obj == MP_OBJ_NULL) { + previous_obj = mp_const_none; + } + if (args[0] == mp_const_none) { + MP_STATE_VM(dupterm_objs[idx]) = MP_OBJ_NULL; + } else { + mp_get_stream_raise(args[0], MP_STREAM_OP_READ | MP_STREAM_OP_WRITE | MP_STREAM_OP_IOCTL); + MP_STATE_VM(dupterm_objs[idx]) = args[0]; + } + + #if MICROPY_PY_OS_DUPTERM_STREAM_DETACHED_ATTACHED + mp_os_dupterm_stream_detached_attached(previous_obj, args[0]); + #endif + + return previous_obj; +} +MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_os_dupterm_obj, 1, 2, mp_os_dupterm); + +MP_REGISTER_ROOT_POINTER(mp_obj_t dupterm_objs[MICROPY_PY_OS_DUPTERM]); + +#endif // MICROPY_PY_OS_DUPTERM |