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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2014 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 <stdio.h>
#include <stdint.h>
#include "mpconfig.h"
#include "misc.h"
#include "qstr.h"
#include "obj.h"
#include "gc.h"
#include "gccollect.h"
STATIC uint32_t stack_end;
mp_uint_t gc_helper_get_regs_and_sp(mp_uint_t *regs);
void gc_collect_init(void) {
mp_uint_t regs[8];
mp_uint_t sp = gc_helper_get_regs_and_sp(regs);
stack_end = sp;
//printf("stack=%p ram_end=%p %d\n", stack_end, &_ram_end);
}
void gc_collect(void) {
// start the GC
gc_collect_start();
// We need to scan everything in RAM that can hold a pointer.
// The data segment is used, but should not contain pointers, so we just scan the bss.
gc_collect_root((void**)&_bss_start, ((uint32_t)&_bss_end - (uint32_t)&_bss_start) / sizeof(uint32_t));
// get the registers and the sp
mp_uint_t regs[8];
mp_uint_t sp = gc_helper_get_regs_and_sp(regs);
// trace the stack, including the registers (since they live on the stack in this function)
gc_collect_root((void**)sp, (stack_end - sp) / sizeof(uint32_t));
// end the GC
gc_collect_end();
}
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