# lv_assert.h (/api/misc/lv_assert_h)
Macros [#macros]
LV_ASSERT [#lv_assert]
```c title=" " lineNumbers=1
#define LV_ASSERT(expr) \
do { \
if(!(expr)) { \
LV_LOG_ERROR("Asserted at expression: %s", #expr); \
LV_ASSERT_HANDLER \
} \
} while(0)
```
LV_ASSERT_MSG [#lv_assert_msg]
```c title=" " lineNumbers=1
#define LV_ASSERT_MSG(expr, msg) \
do { \
if(!(expr)) { \
LV_LOG_ERROR("Asserted at expression: %s (%s)", #expr, msg); \
LV_ASSERT_HANDLER \
} \
} while(0)
```
LV_ASSERT_FORMAT_MSG [#lv_assert_format_msg]
```c title=" " lineNumbers=1
#define LV_ASSERT_FORMAT_MSG(expr, format, ...) \
do { \
if(!(expr)) { \
LV_LOG_ERROR("Asserted at expression: %s " format , #expr, __VA_ARGS__); \
LV_ASSERT_HANDLER \
} \
} while(0)
```
LV_ASSERT_NULL [#lv_assert_null]
```c title=" " lineNumbers=1
#define LV_ASSERT_NULL(p) \
LV_ASSERT_MSG(p != NULL, "NULL pointer");
```
LV_ASSERT_MALLOC [#lv_assert_malloc]
```c title=" " lineNumbers=1
#define LV_ASSERT_MALLOC(p) \
LV_ASSERT_MSG(p != NULL, "Out of memory");
```
LV_ASSERT_MEM_INTEGRITY [#lv_assert_mem_integrity]
```c title=" " lineNumbers=1
#define LV_ASSERT_MEM_INTEGRITY() \
LV_ASSERT_MSG(lv_mem_test() == LV_RESULT_OK, "Memory integrity error");
```
Dependencies [#dependencies]