相关疑难解决方法(0)

鉴于希望从其内容中抽象出循环缓冲区的结构,并从以下代码段开始(由此维基百科条目提供):

typedef struct
{ 
    int value;
} ElemType;

typedef struct
{
    int         size;      /* total number of elements */
    int         start;     /* index of oldest element */
    int         count;     /* index at which to write new element  */
    ElemType   *elements;  /* vector of elements */
} CircularBuffer;

void cbInit(CircularBuffer *cb, int size) {
    cb->size  = size;
    cb->start = 0;
    cb->count = 0;
    cb->elements = (ElemType *)calloc(cb->size, sizeof(ElemType));
}

如何抽象元素类型,以便在定义CircularBuffer的实例时指定它？我到目前为止的尝试如下:

CircularBuffer *cbInit(uint16 size, void *element)
{
    CircularBuffer *buffer;

    buffer …

可能重复:
取消引用void指针

我有这样一个函数调用:

void foo(void *context)   //function prototype
..
..
..
main()
{
.
.
foo(&(ptr->block));  //where ptr->block is of type integer.
.
.
.
void foo(void *context)
{
 Here I try to use the ptr->block but am having problems. I have tried 

 if((int *)context ==1)  
  ..
  ..
}

我在函数中将它转换回int以使用它.我在foo()函数中取消引用它是错误的吗？