bcc827d695
This commit adds a new option MICROPY_GC_SPLIT_HEAP (disabled by default) which, when enabled, allows the GC heap to be split over multiple memory areas/regions. The first area is added with gc_init() and subsequent areas can be added with gc_add(). New areas can be added at runtime. Areas are stored internally as a linked list, and calls to gc_alloc() can be satisfied from any area. This feature has the following use-cases (among others): - The ESP32 has a fragmented OS heap, so to use all (or more) of it the GC heap must be split. - Other MCUs may have disjoint RAM regions and are now able to use them all for the GC heap. - The user could explicitly increase the size of the GC heap. - Support a dynamic heap while running on an OS, adding more heap when necessary.
79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/*
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* This file is part of the MicroPython 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) 2013, 2014 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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#ifndef MICROPY_INCLUDED_PY_GC_H
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#define MICROPY_INCLUDED_PY_GC_H
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#include <stdbool.h>
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#include <stddef.h>
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#include "py/mpconfig.h"
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void gc_init(void *start, void *end);
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#if MICROPY_GC_SPLIT_HEAP
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// Used to add additional memory areas to the heap.
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void gc_add(void *start, void *end);
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#endif
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// These lock/unlock functions can be nested.
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// They can be used to prevent the GC from allocating/freeing.
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void gc_lock(void);
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void gc_unlock(void);
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bool gc_is_locked(void);
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// A given port must implement gc_collect by using the other collect functions.
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void gc_collect(void);
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void gc_collect_start(void);
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void gc_collect_root(void **ptrs, size_t len);
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void gc_collect_end(void);
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// Use this function to sweep the whole heap and run all finalisers
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void gc_sweep_all(void);
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enum {
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GC_ALLOC_FLAG_HAS_FINALISER = 1,
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};
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void *gc_alloc(size_t n_bytes, unsigned int alloc_flags);
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void gc_free(void *ptr); // does not call finaliser
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size_t gc_nbytes(const void *ptr);
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void *gc_realloc(void *ptr, size_t n_bytes, bool allow_move);
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typedef struct _gc_info_t {
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size_t total;
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size_t used;
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size_t free;
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size_t max_free;
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size_t num_1block;
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size_t num_2block;
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size_t max_block;
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} gc_info_t;
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void gc_info(gc_info_t *info);
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void gc_dump_info(void);
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void gc_dump_alloc_table(void);
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#endif // MICROPY_INCLUDED_PY_GC_H
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