returns a pointer to the allocated memory; The memory is set to zero, If nmemb or size is 0,then callocO) returns either NULL, or a unique pointer value that can later be successfully passed to free(). malloc( ) allocates size bytes and returns a pointerto the allocated memory. The ...
including overhead. */struct malloc_chunk*fd;/* double links -- used only if free. */struct malloc_chunk*bk;/* Only used for large blocks: pointer to next larger size. */struct malloc_chunk*fd_nextsize;/* double links
C,C++规定,void *类型可以强转为任何其他类型的的指针。 malloc returns a void pointer to the allocated space, or NULL if there is insufficient memory available. To return a pointer to a type other than void, use a type cast on the return value. The storage space pointed to by the return ...
INTERNAL_SIZE_T size;/* Size in bytes, including overhead. */ structmalloc_chunk*fd;/* double links -- used only if free. */ structmalloc_chunk*bk; /* Only used for large blocks: pointer to next larger size. */ structmalloc_chunk*fd_nextsize;/* double links -- used only if fre...
use a type cast on the return value. The storage space pointed to by the return value is guaranteed to be suitably aligned for storage of any type of object. If size is 0,mallocallocates a zero-length item in the heap and returns a valid pointer to that item. Always check the return...
说明:malloc 向系统申请分配指定size个字节的内存空间。返回类型是 void* 类型。void* 表示未确定类型的指针。C,C++规定,void* 类型可以强制转换为任何其它类型的指针。这个在MSDN上可以找到相关的解释,具体内容如下: mallocreturns a void pointer to the allocated space, orNULLif there is insufficient memory ava...
gcc -o malloctest malloctest.c -g Love-Yan:pointertest MD101$ ./malloctest p[0]:zp[1]:hp[2]:op[3]:np[4]:gp[5]:xp[6]:ip[7]:ap[8]:op[9]:mp[10]:ip[11]:np[12]:gp[13]:p[14]:p malloctest(3232) malloc: *** error for object 0x107a45f4e: pointer being freed was...
mallocby definition is guaranteed to return a pointer that is properly aligned for storing any standard type in C program(and, therefore, any type built from standard types). It depends on what kind of alignment you expect. Do you want a stricter alignment, or a more relaxed alignment?
说明:malloc 向系统申请分配指定size个字节的内存空间。返回类型是 void* 类型。void* 表示未确定类型的指针。C,C++规定,void* 类型可以强制转换为任何其它类型的指针。这个在MSDN上可以找到相关的解释,具体内容如下: mallocreturns a void pointer to the allocated space, orNULLif there is insufficient memory ava...
use a type cast on the return value. The storage space pointed to by the return value is guaranteed to be suitably aligned for storage of any type of object. If size is 0,mallocallocates a zero-length item in the heap and returns a valid pointer to that item. Always check the return...