1c9210bc2b
POSIX doesn't guarantee something like that to work, but it works on any system with careful signal implementation. Roughly, the requirement is that signal handler is executed in the context of the process, its main thread, etc. This is true for Linux. Also tested to work without issues on MacOSX.
139 lines
4.2 KiB
C
139 lines
4.2 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) 2015 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 <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#include "py/mpstate.h"
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#include "py/mphal.h"
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#ifndef _WIN32
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#include <signal.h>
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STATIC void sighandler(int signum) {
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if (signum == SIGINT) {
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#if MICROPY_ASYNC_KBD_INTR
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mp_obj_exception_clear_traceback(MP_STATE_VM(keyboard_interrupt_obj));
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sigset_t mask;
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sigemptyset(&mask);
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// On entry to handler, its signal is blocked, and unblocked on
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// normal exit. As we instead perform longjmp, unblock it manually.
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sigprocmask(SIG_SETMASK, &mask, NULL);
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nlr_raise(MP_STATE_VM(keyboard_interrupt_obj));
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#else
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if (MP_STATE_VM(mp_pending_exception) == MP_STATE_VM(keyboard_interrupt_obj)) {
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// this is the second time we are called, so die straight away
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exit(1);
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}
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mp_obj_exception_clear_traceback(MP_STATE_VM(keyboard_interrupt_obj));
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MP_STATE_VM(mp_pending_exception) = MP_STATE_VM(keyboard_interrupt_obj);
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#endif
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}
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}
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#endif
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void mp_hal_set_interrupt_char(char c) {
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// configure terminal settings to (not) let ctrl-C through
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if (c == CHAR_CTRL_C) {
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#ifndef _WIN32
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// enable signal handler
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struct sigaction sa;
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sa.sa_flags = 0;
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sa.sa_handler = sighandler;
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sigemptyset(&sa.sa_mask);
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sigaction(SIGINT, &sa, NULL);
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#endif
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} else {
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#ifndef _WIN32
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// disable signal handler
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struct sigaction sa;
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sa.sa_flags = 0;
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sa.sa_handler = SIG_DFL;
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sigemptyset(&sa.sa_mask);
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sigaction(SIGINT, &sa, NULL);
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#endif
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}
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}
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#if MICROPY_USE_READLINE == 1
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#include <termios.h>
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static struct termios orig_termios;
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void mp_hal_stdio_mode_raw(void) {
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// save and set terminal settings
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tcgetattr(0, &orig_termios);
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static struct termios termios;
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termios = orig_termios;
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termios.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
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termios.c_cflag = (termios.c_cflag & ~(CSIZE | PARENB)) | CS8;
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termios.c_lflag = 0;
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termios.c_cc[VMIN] = 1;
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termios.c_cc[VTIME] = 0;
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tcsetattr(0, TCSAFLUSH, &termios);
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}
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void mp_hal_stdio_mode_orig(void) {
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// restore terminal settings
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tcsetattr(0, TCSAFLUSH, &orig_termios);
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}
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#endif
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int mp_hal_stdin_rx_chr(void) {
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unsigned char c;
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int ret = read(0, &c, 1);
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if (ret == 0) {
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c = 4; // EOF, ctrl-D
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} else if (c == '\n') {
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c = '\r';
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}
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return c;
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}
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void mp_hal_stdout_tx_strn(const char *str, size_t len) {
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int ret = write(1, str, len);
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(void)ret; // to suppress compiler warning
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}
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// cooked is same as uncooked because the terminal does some postprocessing
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void mp_hal_stdout_tx_strn_cooked(const char *str, size_t len) {
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mp_hal_stdout_tx_strn(str, len);
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}
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void mp_hal_stdout_tx_str(const char *str) {
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mp_hal_stdout_tx_strn(str, strlen(str));
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}
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mp_uint_t mp_hal_ticks_ms(void) {
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struct timeval tv;
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gettimeofday(&tv, NULL);
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return tv.tv_sec * 1000 + tv.tv_usec / 1000;
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}
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