circuitpython/ports/webassembly/mphalport.h

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013, 2014 Damien P. George and 2017, 2018 Rami Ali
 *
 * 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 "py/obj.h"
#include "shared/runtime/interrupt_char.h"

#define mp_hal_stdin_rx_chr() (0)
void mp_hal_stdout_tx_strn(const char *str, size_t len);

void mp_hal_delay_ms(mp_uint_t ms);
void mp_hal_delay_us(mp_uint_t us);
mp_uint_t mp_hal_ticks_ms(void);
mp_uint_t mp_hal_ticks_us(void);
mp_uint_t mp_hal_ticks_cpu(void);

int mp_hal_get_interrupt_char(void);

#if MICROPY_VFS_POSIX

#include <errno.h>

// This macro is used to implement PEP 475 to retry specified syscalls on EINTR
#define MP_HAL_RETRY_SYSCALL(ret, syscall, raise) \
    { \
        for (;;) { \
            ret = syscall; \
            if (ret == -1) { \
                int err = errno; \
                if (err == EINTR) { \
                    mp_handle_pending(true); \
                    continue; \
                } \
                raise; \
            } \
            break; \
        } \
    }

#endif