13  * 2017-07-14     armink       fix rt_realloc issue when new size is 0
60 static void (*rt_malloc_hook)(void *ptr, rt_size_t size);
75 void rt_malloc_sethook(void (*hook)(void *ptr, rt_size_t size))  in rt_malloc_sethook()  argument
216         /* calculate the aligned memory size */  in rt_system_heap_init()
230     RT_DEBUG_LOG(RT_DEBUG_MEM, ("mem init, heap begin address 0x%x, size %d\n",  in rt_system_heap_init()
266  * Allocate a block of memory with a minimum of 'size' bytes.
268  * @param size is the minimum size of the requested block in bytes.
272 void *rt_malloc(rt_size_t size)  in rt_malloc()  argument
277     if (size == 0)  in rt_malloc()
282     if (size != RT_ALIGN(size, RT_ALIGN_SIZE))  in rt_malloc()
283         RT_DEBUG_LOG(RT_DEBUG_MEM, ("malloc size %d, but align to %d\n",  in rt_malloc()
284                                     size, RT_ALIGN(size, RT_ALIGN_SIZE)));  in rt_malloc()
286         RT_DEBUG_LOG(RT_DEBUG_MEM, ("malloc size %d\n", size));  in rt_malloc()
288     /* alignment size */  in rt_malloc()
289     size = RT_ALIGN(size, RT_ALIGN_SIZE);  in rt_malloc()
291     if (size > mem_size_aligned)  in rt_malloc()
299     if (size < MIN_SIZE_ALIGNED)  in rt_malloc()
300         size = MIN_SIZE_ALIGNED;  in rt_malloc()
306          ptr < mem_size_aligned - size;  in rt_malloc()
311         if ((!mem->used) && (mem->next - (ptr + SIZEOF_STRUCT_MEM)) >= size)  in rt_malloc()
314              * mem->next - (ptr + SIZEOF_STRUCT_MEM) gives us the 'user data size' of mem */  in rt_malloc()
317                 (size + SIZEOF_STRUCT_MEM + MIN_SIZE_ALIGNED))  in rt_malloc()
323                  * mem->next - (ptr + (2*SIZEOF_STRUCT_MEM)) == size,  in rt_malloc()
329                 ptr2 = ptr + SIZEOF_STRUCT_MEM + size;  in rt_malloc()
350                 used_mem += (size + SIZEOF_STRUCT_MEM);  in rt_malloc()
390             RT_ASSERT((rt_ubase_t)mem + SIZEOF_STRUCT_MEM + size <= (rt_ubase_t)heap_end);  in rt_malloc()
395                          ("allocate memory at 0x%x, size: %d\n",  in rt_malloc()
400                                 (((void *)((rt_uint8_t *)mem + SIZEOF_STRUCT_MEM)), size));  in rt_malloc()
417  * @param newsize the required new size
423     rt_size_t size;  in rt_realloc()  local
430     /* alignment size */  in rt_realloc()
462     size = mem->next - ptr - SIZEOF_STRUCT_MEM;  in rt_realloc()
463     if (size == newsize)  in rt_realloc()
465         /* the size is the same as */  in rt_realloc()
471     if (newsize + SIZEOF_STRUCT_MEM + MIN_SIZE < size)  in rt_realloc()
475         used_mem -= (size - newsize);  in rt_realloc()
505         rt_memcpy(nmem, rmem, size < newsize ? size : newsize);  in rt_realloc()
515  * that are size bytes of memory each and returns a pointer to the allocated
521  * @param size size of the objects to allocate
525 void *rt_calloc(rt_size_t count, rt_size_t size)  in rt_calloc()  argument
529     /* allocate 'count' objects of size 'size' */  in rt_calloc()
530     p = rt_malloc(count * size);  in rt_calloc()
534         rt_memset(p, 0, count * size);  in rt_calloc()
573                  ("release memory 0x%x, size: %d\n",  in rt_free()
659     rt_kprintf("  size: %d\n", mem->next - position - SIZEOF_STRUCT_MEM);  in FINSH_FUNCTION_EXPORT()
681         int size;  in memtrace()  local
685         size = mem->next - position - SIZEOF_STRUCT_MEM;  in memtrace()
686         if (size < 1024)  in memtrace()
687             rt_kprintf("%5d", size);  in memtrace()
688         else if (size < 1024 * 1024)  in memtrace()
689             rt_kprintf("%4dK", size / 1024);  in memtrace()
691             rt_kprintf("%4dM", size / (1024 * 1024));  in memtrace()