lv_mem.h
Functions
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void *lv_malloc(size_t size)
Allocate a memory dynamically
- Parameters:
size -- size of the memory to allocate in bytes
- Returns:
pointer to the allocated memory
-
void lv_free(void *data)
Free an allocated data
- Parameters:
data -- pointer to an allocated memory
-
void *lv_realloc(void *data_p, size_t new_size)
Reallocate a memory with a new size. The old content will be kept.
- Parameters:
data_p -- pointer to an allocated memory. Its content will be copied to the new memory block and freed
new_size -- the desired new size in byte
- Returns:
pointer to the new memory, NULL on failure
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void *lv_memcpy(void *dst, const void *src, size_t len)
Copies a block of memory from a source address to a destination address.
Note
The function does not check for any overlapping of the source and destination memory blocks.
- Parameters:
dst -- Pointer to the destination array where the content is to be copied.
src -- Pointer to the source of data to be copied.
len -- Number of bytes to copy.
- Returns:
Pointer to the destination array.
-
void lv_memset(void *dst, uint8_t v, size_t len)
Fills a block of memory with a specified value.
- Parameters:
dst -- Pointer to the destination array to fill with the specified value.
v -- Value to be set. The value is passed as an int, but the function fills the block of memory using the unsigned char conversion of this value.
len -- Number of bytes to be set to the value.
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static inline void lv_memzero(void *dst, size_t len)
Same as
memset(dst, 0x00, len).- Parameters:
dst -- pointer to the destination buffer
len -- number of byte to set
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size_t lv_strlen(const char *str)
Computes the length of the string str up to, but not including the terminating null character.
- Parameters:
str -- Pointer to the null-terminated byte string to be examined.
- Returns:
The length of the string in bytes.
-
char *lv_strncpy(char *dst, const char *src, size_t dest_size)
Copies up to dest_size characters from the string pointed to by src to the character array pointed to by dst.
- Parameters:
dst -- Pointer to the destination array where the content is to be copied.
src -- Pointer to the source of data to be copied.
dest_size -- Maximum number of characters to be copied to dst, including the null character.
- Returns:
A pointer to the destination array, which is dst.
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char *lv_strcpy(char *dst, const char *src)
Copies the string pointed to by src, including the terminating null character, to the character array pointed to by dst.
- Parameters:
dst -- Pointer to the destination array where the content is to be copied.
src -- Pointer to the source of data to be copied.
- Returns:
A pointer to the destination array, which is dst.
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lv_res_t lv_mem_test(void)
Tests the memory allocation system by allocating and freeing a block of memory.
- Returns:
LV_RES_OK if the memory allocation system is working properly, or LV_RES_INV if there is an error.
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void lv_mem_monitor(lv_mem_monitor_t *mon_p)
Give information about the work memory of dynamic allocation
- Parameters:
mon_p -- pointer to a lv_mem_monitor_t variable, the result of the analysis will be stored here
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struct lv_mem_monitor_t
- #include <lv_mem.h>
Heap information structure.