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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
*
* 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 "reload.h"
#include "py/mphal.h"
#include "py/mpstate.h"
#include "supervisor/shared/reload.h"
#include "supervisor/shared/tick.h"
supervisor_allocation *next_code_allocation;
#include "shared-bindings/supervisor/Runtime.h"
// True if user has disabled autoreload.
static bool autoreload_enabled = false;
// Non-zero if autoreload is temporarily off, due to an AUTORELOAD_SUSPEND_... reason.
static uint32_t autoreload_suspended = 0;
volatile uint32_t last_autoreload_trigger = 0;
void reload_initiate(supervisor_run_reason_t run_reason) {
supervisor_set_run_reason(run_reason);
// Raise reload exception, in case code is running.
MP_STATE_THREAD(mp_pending_exception) = MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_reload_exception));
#if MICROPY_ENABLE_SCHEDULER
if (MP_STATE_VM(sched_state) == MP_SCHED_IDLE) {
MP_STATE_VM(sched_state) = MP_SCHED_PENDING;
}
#endif
}
void autoreload_reset() {
last_autoreload_trigger = 0;
}
void autoreload_enable() {
autoreload_enabled = true;
last_autoreload_trigger = 0;
}
void autoreload_disable() {
autoreload_enabled = false;
}
void autoreload_suspend(uint32_t suspend_reason_mask) {
autoreload_suspended |= suspend_reason_mask;
}
void autoreload_resume(uint32_t suspend_reason_mask) {
autoreload_suspended &= ~suspend_reason_mask;
}
inline bool autoreload_is_enabled() {
return autoreload_enabled;
}
void autoreload_trigger() {
if (autoreload_enabled & !autoreload_suspended) {
last_autoreload_trigger = supervisor_ticks_ms32();
// Guard against the rare time that ticks is 0;
if (last_autoreload_trigger == 0) {
last_autoreload_trigger += 1;
}
// Initiate a reload of the VM immediately. Later code will pause to
// wait for the autoreload to become ready. Doing the VM exit
// immediately is clearer for the user.
reload_initiate(RUN_REASON_AUTO_RELOAD);
}
}
bool autoreload_ready() {
if (last_autoreload_trigger == 0 || autoreload_suspended != 0) {
return false;
}
// Wait for autoreload interval before reloading
uint32_t now = supervisor_ticks_ms32();
uint32_t diff;
if (now >= last_autoreload_trigger) {
diff = now - last_autoreload_trigger;
} else {
diff = now + (0xffffffff - last_autoreload_trigger);
}
return diff > CIRCUITPY_AUTORELOAD_DELAY_MS;
}
bool autoreload_pending(void) {
return last_autoreload_trigger != 0;
}
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