// 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
#include <stdint.h>
#include <stdlib.h>
#include "multi_heap.h"
#include <sdkconfig.h>
#include "esp_err.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Flags to indicate the capabilities of the various memory systems
*/
#define MALLOC_CAP_EXEC (1<<0) ///< Memory must be able to run executable code
#define MALLOC_CAP_32BIT (1<<1) ///< Memory must allow for aligned 32-bit data accesses
#define MALLOC_CAP_8BIT (1<<2) ///< Memory must allow for 8/16/...-bit data accesses
#define MALLOC_CAP_DMA (1<<3) ///< Memory must be able to accessed by DMA
#define MALLOC_CAP_PID2 (1<<4) ///< Memory must be mapped to PID2 memory space (PIDs are not currently used)
#define MALLOC_CAP_PID3 (1<<5) ///< Memory must be mapped to PID3 memory space (PIDs are not currently used)
#define MALLOC_CAP_PID4 (1<<6) ///< Memory must be mapped to PID4 memory space (PIDs are not currently used)
#define MALLOC_CAP_PID5 (1<<7) ///< Memory must be mapped to PID5 memory space (PIDs are not currently used)
#define MALLOC_CAP_PID6 (1<<8) ///< Memory must be mapped to PID6 memory space (PIDs are not currently used)
#define MALLOC_CAP_PID7 (1<<9) ///< Memory must be mapped to PID7 memory space (PIDs are not currently used)
#define MALLOC_CAP_SPIRAM (1<<10) ///< Memory must be in SPI RAM
#define MALLOC_CAP_INTERNAL (1<<11) ///< Memory must be internal; specifically it should not disappear when flash/spiram cache is switched off
#define MALLOC_CAP_DEFAULT (1<<12) ///< Memory can be returned in a non-capability-specific memory allocation (e.g. malloc(), calloc()) call
#define MALLOC_CAP_IRAM_8BIT (1<<13) ///< Memory must be in IRAM and allow unaligned access
#define MALLOC_CAP_RETENTION (1<<14)
#define MALLOC_CAP_INVALID (1<<31) ///< Memory can't be used / list end marker
/**
* @brief callback called when a allocation operation fails, if registered
* @param size in bytes of failed allocation
* @param caps capabillites requested of failed allocation
* @param function_name function which generated the failure
*/
typedef void (*esp_alloc_failed_hook_t) (size_t size, uint32_t caps, const char * function_name);
/**
* @brief registers a callback function to be invoked if a memory allocation operation fails
* @param callback caller defined callback to be invoked
* @return ESP_OK if callback was registered.
*/
esp_err_t heap_caps_register_failed_alloc_callback(esp_alloc_failed_hook_t callback);
/**
* @brief Allocate a chunk of memory which has the given capabilities
*
* Equivalent semantics to libc malloc(), for capability-aware memory.
*
* In IDF, ``malloc(p)`` is equivalent to ``heap_caps_malloc(p, MALLOC_CAP_8BIT)``.
*
* @param size Size, in bytes, of the amount of memory to allocate
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory to be returned
*
* @return A pointer to the memory allocated on success, NULL on failure
*/
void *heap_caps_malloc(size_t size, uint32_t caps);
/**
* @brief Free memory previously allocated via heap_caps_malloc() or heap_caps_realloc().
*
* Equivalent semantics to libc free(), for capability-aware memory.
*
* In IDF, ``free(p)`` is equivalent to ``heap_caps_free(p)``.
*
* @param ptr Pointer to memory previously returned from heap_caps_malloc() or heap_caps_realloc(). Can be NULL.
*/
void heap_caps_free( void *ptr);
/**
* @brief Reallocate memory previously allocated via heap_caps_malloc() or heap_caps_realloc().
*
* Equivalent semantics to libc realloc(), for capability-aware memory.
*
* In IDF, ``realloc(p, s)`` is equivalent to ``heap_caps_realloc(p, s, MALLOC_CAP_8BIT)``.
*
* 'caps' parameter can be different to the capabilities that any original 'ptr' was allocated with. In this way,
* realloc can be used to "move" a buffer if necessary to ensure it meets a new set of capabilities.
*
* @param ptr Pointer to previously allocated memory, or NULL for a new allocation.
* @param size Size of the new buffer requested, or 0 to free the buffer.
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory desired for the new allocation.
*
* @return Pointer to a new buffer of size 'size' with capabilities 'caps', or NULL if allocation failed.
*/
void *heap_caps_realloc( void *ptr, size_t size, uint32_t caps);
/**
* @brief Allocate a aligned chunk of memory which has the given capabilities
*
* Equivalent semantics to libc aligned_alloc(), for capability-aware memory.
* @param alignment How the pointer received needs to be aligned
* must be a power of two
* @param size Size, in bytes, of the amount of memory to allocate
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory to be returned
*
* @return A pointer to the memory allocated on success, NULL on failure
*
*
*/
void *heap_caps_aligned_alloc(size_t alignment, size_t size, uint32_t caps);
/**
* @brief Used to deallocate memory previously allocated with heap_caps_aligned_alloc
*
* @param ptr Pointer to the memory allocated
* @note This function is deprecated, plase consider using heap_caps_free() instead
*/
void __attribute__((deprecated)) heap_caps_aligned_free(void *ptr);
/**
* @brief Allocate a aligned chunk of memory which has the given capabilities. The initialized value in the memory is set to zero.
*
* @param alignment How the pointer received needs to be aligned
* must be a power of two
* @param n Number of continuing chunks of memory to allocate
* @param size Size, in bytes, of a chunk of memory to allocate
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory to be returned
*
* @return A pointer to the memory allocated on success, NULL on failure
*
*/
void *heap_caps_aligned_calloc(size_t alignment, size_t n, size_t size, uint32_t caps);
/**
* @brief Allocate a chunk of memory which has the given capabilities. The initialized value in the memory is set to zero.
*
* Equivalent semantics to libc calloc(), for capability-aware memory.
*
* In IDF, ``calloc(p)`` is equivalent to ``heap_caps_calloc(p, MALLOC_CAP_8BIT)``.
*
* @param n Number of continuing chunks of memory to allocate
* @param size Size, in bytes, of a chunk of memory to allocate
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory to be returned
*
* @return A pointer to the memory allocated on success, NULL on failure
*/
void *heap_caps_calloc(size_t n, size_t size, uint32_t caps);
/**
* @brief Get the total size of all the regions that have the given capabilities
*
* This function takes all regions capable of having the given capabilities allocated in them
* and adds up the total space they have.
*
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory
*
* @return total size in bytes
*/
size_t heap_caps_get_total_size(uint32_t caps);
/**
* @brief Get the total free size of all the regions that have the given capabilities
*
* This function takes all regions capable of having the given capabilities allocated in them
* and adds up the free space they have.
*
* Note that because of heap fragmentation it is probably not possible to allocate a single block of memory
* of this size. Use heap_caps_get_largest_free_block() for this purpose.
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory
*
* @return Amount of free bytes in the regions
*/
size_t heap_caps_get_free_size( uint32_t caps );
/**
* @brief Get the total minimum free memory of all regions with the given capabilities
*
* This adds all the low water marks of the regions capable of delivering the memory
* with the given capabilities.
*
* Note the result may be less than the global all-time minimum available heap of this kind, as "low water marks" are
* tracked per-region. Individual regions' heaps may have reached their "low water marks" at different points in time. However
* this result still gives a "worst case" indication for all-time minimum free heap.
*
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory
*
* @return Amount of free bytes in the regions
*/
size_t heap_caps_get_minimum_free_size( uint32_t caps );
/**
* @brief Get the largest free block of memory able to be allocated with the given capabilities.
*
* Returns the largest value of ``s`` for which ``heap_caps_malloc(s, caps)`` will succeed.
*
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory
*
* @return Size of largest free block in bytes.
*/
size_t heap_caps_get_largest_free_block( uint32_t caps );
/**
* @brief Get heap info for all regions with the given capabilities.
*
* Calls multi_heap_info() on all heaps which share the given capabilities. The information returned is an aggregate
* across all matching heaps. The meanings of fields are the same as defined for multi_heap_info_t, except that
* ``minimum_free_bytes`` has the same caveats described in heap_caps_get_minimum_free_size().
*
* @param info Pointer to a structure which will be filled with relevant
* heap metadata.
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory
*
*/
void heap_caps_get_info( multi_heap_info_t *info, uint32_t caps );
/**
* @brief Print a summary of all memory with the given capabilities.
*
* Calls multi_heap_info on all heaps which share the given capabilities, and
* prints a two-line summary for each, then a total summary.
*
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory
*
*/
void heap_caps_print_heap_info( uint32_t caps );
/**
* @brief Check integrity of all heap memory in the system.
*
* Calls multi_heap_check on all heaps. Optionally print errors if heaps are corrupt.
*
* Calling this function is equivalent to calling heap_caps_check_integrity
* with the caps argument set to MALLOC_CAP_INVALID.
*
* @param print_errors Print specific errors if heap corruption is found.
*
* @return True if all heaps are valid, False if at least one heap is corrupt.
*/
bool heap_caps_check_integrity_all(bool print_errors);
/**
* @brief Check integrity of all heaps with the given capabilities.
*
* Calls multi_heap_check on all heaps which share the given capabilities. Optionally
* print errors if the heaps are corrupt.
*
* See also heap_caps_check_integrity_all to check all heap memory
* in the system and heap_caps_check_integrity_addr to check memory
* around a single address.
*
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory
* @param print_errors Print specific errors if heap corruption is found.
*
* @return True if all heaps are valid, False if at least one heap is corrupt.
*/
bool heap_caps_check_integrity(uint32_t caps, bool print_errors);
/**
* @brief Check integrity of heap memory around a given address.
*
* This function can be used to check the integrity of a single region of heap memory,
* which contains the given address.
*
* This can be useful if debugging heap integrity for corruption at a known address,
* as it has a lower overhead than checking all heap regions. Note that if the corrupt
* address moves around between runs (due to timing or other factors) then this approach
* won't work and you should call heap_caps_check_integrity or
* heap_caps_check_integrity_all instead.
*
* @note The entire heap region around the address is checked, not only the adjacent
* heap blocks.
*
* @param addr Address in memory. Check for corruption in region containing this address.
* @param print_errors Print specific errors if heap corruption is found.
*
* @return True if the heap containing the specified address is valid,
* False if at least one heap is corrupt or the address doesn't belong to a heap region.
*/
bool heap_caps_check_integrity_addr(intptr_t addr, bool print_errors);
/**
* @brief Enable malloc() in external memory and set limit below which
* malloc() attempts are placed in internal memory.
*
* When external memory is in use, the allocation strategy is to initially try to
* satisfy smaller allocation requests with internal memory and larger requests
* with external memory. This sets the limit between the two, as well as generally
* enabling allocation in external memory.
*
* @param limit Limit, in bytes.
*/
void heap_caps_malloc_extmem_enable(size_t limit);
/**
* @brief Allocate a chunk of memory as preference in decreasing order.
*
* @attention The variable parameters are bitwise OR of MALLOC_CAP_* flags indicating the type of memory.
* This API prefers to allocate memory with the first parameter. If failed, allocate memory with
* the next parameter. It will try in this order until allocating a chunk of memory successfully
* or fail to allocate memories with any of the parameters.
*
* @param size Size, in bytes, of the amount of memory to allocate
* @param num Number of variable paramters
*
* @return A pointer to the memory allocated on success, NULL on failure
*/
void *heap_caps_malloc_prefer( size_t size, size_t num, ... );
/**
* @brief Allocate a chunk of memory as preference in decreasing order.
*
* @param ptr Pointer to previously allocated memory, or NULL for a new allocation.
* @param size Size of the new buffer requested, or 0 to free the buffer.
* @param num Number of variable paramters
*
* @return Pointer to a new buffer of size 'size', or NULL if allocation failed.
*/
void *heap_caps_realloc_prefer( void *ptr, size_t size, size_t num, ... );
/**
* @brief Allocate a chunk of memory as preference in decreasing order.
*
* @param n Number of continuing chunks of memory to allocate
* @param size Size, in bytes, of a chunk of memory to allocate
* @param num Number of variable paramters
*
* @return A pointer to the memory allocated on success, NULL on failure
*/
void *heap_caps_calloc_prefer( size_t n, size_t size, size_t num, ... );
/**
* @brief Dump the full structure of all heaps with matching capabilities.
*
* Prints a large amount of output to serial (because of locking limitations,
* the output bypasses stdout/stderr). For each (variable sized) block
* in each matching heap, the following output is printed on a single line:
*
* - Block address (the data buffer returned by malloc is 4 bytes after this
* if heap debugging is set to Basic, or 8 bytes otherwise).
* - Data size (the data size may be larger than the size requested by malloc,
* either due to heap fragmentation or because of heap debugging level).
* - Address of next block in the heap.
* - If the block is free, the address of the next free block is also printed.
*
* @param caps Bitwise OR of MALLOC_CAP_* flags indicating the type
* of memory
*/
void heap_caps_dump(uint32_t caps);
/**
* @brief Dump the full structure of all heaps.
*
* Covers all registered heaps. Prints a large amount of output to serial.
*
* Output is the same as for heap_caps_dump.
*
*/
void heap_caps_dump_all(void);
/**
* @brief Return the size that a particular pointer was allocated with.
*
* @param ptr Pointer to currently allocated heap memory. Must be a pointer value previously
* returned by heap_caps_malloc,malloc,calloc, etc. and not yet freed.
*
* @note The app will crash with an assertion failure if the pointer is not valid.
*
* @return Size of the memory allocated at this block.
*
*/
size_t heap_caps_get_allocated_size( void *ptr );
#ifdef __cplusplus
}
#endif