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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020 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 "shared-bindings/memorymonitor/__init__.h"
#include "shared-bindings/memorymonitor/AllocationAlarm.h"
#include "py/gc.h"
#include "py/mpstate.h"
#include "py/runtime.h"
void common_hal_memorymonitor_allocationalarm_construct(memorymonitor_allocationalarm_obj_t *self, size_t minimum_block_count) {
self->minimum_block_count = minimum_block_count;
self->next = NULL;
self->previous = NULL;
}
void common_hal_memorymonitor_allocationalarm_set_ignore(memorymonitor_allocationalarm_obj_t *self, mp_int_t count) {
self->count = count;
}
void common_hal_memorymonitor_allocationalarm_pause(memorymonitor_allocationalarm_obj_t *self) {
// Check to make sure we aren't already paused. We can be if we're exiting from an exception we
// caused.
if (self->previous == NULL) {
return;
}
*self->previous = self->next;
self->next = NULL;
self->previous = NULL;
}
void common_hal_memorymonitor_allocationalarm_resume(memorymonitor_allocationalarm_obj_t *self) {
if (self->previous != NULL) {
mp_raise_RuntimeError(translate("Already running"));
}
self->next = MP_STATE_VM(active_allocationalarms);
self->previous = (memorymonitor_allocationalarm_obj_t **)&MP_STATE_VM(active_allocationalarms);
if (self->next != NULL) {
self->next->previous = &self->next;
}
MP_STATE_VM(active_allocationalarms) = self;
}
void memorymonitor_allocationalarms_allocation(size_t block_count) {
memorymonitor_allocationalarm_obj_t *alarm = MP_OBJ_TO_PTR(MP_STATE_VM(active_allocationalarms));
size_t alert_count = 0;
while (alarm != NULL) {
// Hold onto next in case we remove the alarm from the list.
memorymonitor_allocationalarm_obj_t *next = alarm->next;
if (block_count >= alarm->minimum_block_count) {
if (alarm->count > 0) {
alarm->count--;
} else {
// Uncomment the breakpoint below if you want to use a C debugger to figure out the C
// call stack for an allocation.
// asm("bkpt");
// Pause now because we may alert when throwing the exception too.
common_hal_memorymonitor_allocationalarm_pause(alarm);
alert_count++;
}
}
alarm = next;
}
if (alert_count > 0) {
mp_raise_memorymonitor_AllocationError(translate("Attempt to allocate %d blocks"), block_count);
}
}
void memorymonitor_allocationalarms_reset(void) {
MP_STATE_VM(active_allocationalarms) = NULL;
}