Espressif ESP32-S2 User Manual

Chapter 2. API Reference
• lock: Optional pointer to a locking structure to associate with this heap.
void multi_heap_dump(multi_heap_handle_t heap)
Dump heap information to stdout.
For debugging purposes, this function dumps information about every block in the heap to stdout.
Parameters
• heap: Handle to a registered heap.
bool multi_heap_check(multi_heap_handle_t heap, bool print_errors)
Check heap integrity.
Walks the heap and checks all heap data structures are valid. If any errors are detected, an error-specific
message can be optionally printed to stderr. Print behaviour can be overriden at compile time by defining
MULTI_CHECK_FAIL_PRINTF in multi_heap_platform.h.
Return true if heap is valid, false otherwise.
Parameters
• heap: Handle to a registered heap.
• print_errors: If true, errors will be printed to stderr.
size_t multi_heap_free_size(multi_heap_handle_t heap)
Return free heap size.
Returns the number of bytes available in the heap.
Equivalent to the total_free_bytes member returned by multi_heap_get_heap_info().
Note that the heap may be fragmented, so the actual maximum size for a single malloc() may be lower. To
know this size, see the largest_free_block member returned by multi_heap_get_heap_info().
Return Number of free bytes.
Parameters
• heap: Handle to a registered heap.
size_t multi_heap_minimum_free_size(multi_heap_handle_t heap)
Return the lifetime minimum free heap size.
Equivalent to the minimum_free_bytes member returned by multi_heap_get_info().
Returns the lifetime “low water mark”of possible values returned from multi_free_heap_size(), for the
specified heap.
Return Number of free bytes.
Parameters
• heap: Handle to a registered heap.
void multi_heap_get_info(multi_heap_handle_t heap, multi_heap_info_t *info)
Return metadata about a given heap.
Fills a multi_heap_info_t structure with information about the specified heap.
Parameters
• heap: Handle to a registered heap.
• info: Pointer to a structure to fill with heap metadata.
Structures
struct multi_heap_info_t
Structure to access heap metadata via multi_heap_get_info.
Public Members
size_t total_free_bytes
Total free bytes in the heap. Equivalent to multi_free_heap_size().
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Espressif ESP32-S2 Specifications

General

Brand	Espressif
Model	ESP32-S2
Category	Single board computers
Language	English