OVMS3-idf/components/heap/multi_heap_internal.h
Stephen Casner bc56804a49 Add task tracking option for heap usage monitoring
Add back a feature that was available in the old heap implementation
in release/v2.1 and earlier: keep track of which task allocates each
block from the heap. The task handle is conditionally added as
another word in the heap poisoning header under this configuration
option CONFIG_HEAP_TASK_TRACKING.

To allow custom monitoring and debugging code to be added, add helper
functions in multi_heap.c and multi_heap_poisoning.c to provide access
to information in the block headers.
2018-01-10 09:06:50 -08:00

68 lines
3 KiB
C

// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#pragma once
/* Opaque handle to a heap block */
typedef const struct heap_block *multi_heap_block_handle_t;
/* Internal definitions for the "implementation" of the multi_heap API,
as defined in multi_heap.c.
If heap poisioning is disabled, these are aliased directly to the public API.
If heap poisoning is enabled, wrapper functions call each of these.
*/
void *multi_heap_malloc_impl(multi_heap_handle_t heap, size_t size);
void multi_heap_free_impl(multi_heap_handle_t heap, void *p);
void *multi_heap_realloc_impl(multi_heap_handle_t heap, void *p, size_t size);
multi_heap_handle_t multi_heap_register_impl(void *start, size_t size);
void multi_heap_get_info_impl(multi_heap_handle_t heap, multi_heap_info_t *info);
size_t multi_heap_free_size_impl(multi_heap_handle_t heap);
size_t multi_heap_minimum_free_size_impl(multi_heap_handle_t heap);
size_t multi_heap_get_allocated_size_impl(multi_heap_handle_t heap, void *p);
void* multi_heap_get_block_address_impl(multi_heap_block_handle_t block);
/* Some internal functions for heap poisoning use */
/* Check an allocated block's poison bytes are correct. Called by multi_heap_check(). */
bool multi_heap_internal_check_block_poisoning(void *start, size_t size, bool is_free, bool print_errors);
/* Fill a region of memory with the free or malloced pattern.
Called when merging blocks, to overwrite the old block header.
*/
void multi_heap_internal_poison_fill_region(void *start, size_t size, bool is_free);
/* Allow heap poisoning to lock/unlock the heap to avoid race conditions
if multi_heap_check() is running concurrently.
*/
void multi_heap_internal_lock(multi_heap_handle_t heap);
void multi_heap_internal_unlock(multi_heap_handle_t heap);
/* Some internal functions for heap debugging code to use */
/* Get the handle to the first (fixed free) block in a heap */
multi_heap_block_handle_t multi_heap_get_first_block(multi_heap_handle_t heap);
/* Get the handle to the next block in a heap, with validation */
multi_heap_block_handle_t multi_heap_get_next_block(multi_heap_handle_t heap, multi_heap_block_handle_t block);
/* Test if a heap block is free */
bool multi_heap_is_free(const multi_heap_block_handle_t block);
/* Get the data address of a heap block */
void* multi_heap_get_block_address(multi_heap_block_handle_t block);
/* Get the owner identification for a heap block */
void* multi_heap_get_block_owner(multi_heap_block_handle_t block);