KEIL 编译器报的一个语法错误

只看该作者 · 2014-7-17 13:10

__packed struct SPacketQueue
{
struct SPacketQueue  *pNext;
struct SPacketQueue  *pPre;
DWORD Seq; /* sequence of this packet */
struct SMemHead  *MemHead; /* packet store in MemHead' playload */
};

/* tcb (transmit control block). used to keep tcp state
information */
__packed struct STCB
{
struct STCB  *pNext; /* Next Node */

BYTE TCPState;
WORD PortScr;
WORD PortDest;
IP_ADDR IPScr;
IP_ADDR IPDest;

DWORD SeqMine;

struct SPacketQueue  *QUnacked;

};

上面是定义的结构体，函数如下：

void TCPRelease(struct STCB  *pTCB)
{
struct SPacketQueue  *pQ;

/* reclaim Q, and free packet in queue */

while(pQ = TCPOutQ(&(pTCB->QUnacked)))
MemFree(pQ->MemHead);

}
这个函数里面报错  error:  #167: argument of type "struct SPacketQueue *__packed *" is incompatible with parameter of type "struct SPacketQueue **"

如果去掉 __packed struct STCB前面的__packed ，就不报错，请问各位大侠，这是什么毛病，我想所有的参数都对其。

3万 · 2014-7-17 13:31

结构体里又定义结构体，这样不支持吧；

只看该作者 · 2014-7-17 13:54

pTCB->QUnacked本来就是 struct SPacketQueue *，如果你再一次取地址就变成struct SPacketQueue **类型，我想TCPOutQ（）函数参数类型应该不是吧，struct SPacketQueue *__packed *这个是什么类型，LZ最好把TCPOutQ（）的函数原型也发出来

只看该作者 · 2014-7-18 10:51

好的~~

/* move the last unit in queue outof queue,if the queue
is empty return FALSE.actrually last unit is *ppQ */
struct SPacketQueue * TCPOutQ(struct SPacketQueue ** ppQ)
{
struct SPacketQueue *pQ;

/* a empty queue? */
if((pQ = *ppQ) == NULL)
return NULL;

/* after remove it, the queue is empty? */
if(pQ->pNext == pQ)
*ppQ = NULL;
else
{
/* relink */
pQ->pPre->pNext = pQ->pNext;
pQ->pNext->pPre = pQ->pPre;

/* and the queue head *ppQ point to pQ->pPre */
*ppQ = pQ->pPre;
}

/* relaim it. link to QFreeList */
pQ->pNext = QFreeList;
QFreeList = pQ;
return pQ;
}

KEIL 编译器报的一个语法错误

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