EXE程序和DLL之间可能传递FILE指针，但是可能会造成程序崩溃。这是由于_lock_file引起的
[cpp] view plain copy PRint?void __cdecl _lock_file ( FILE *pf ) { /* * The way the FILE (pointed to by pf) is locked depends on whether * it is part of _iob[] or not */ if ( (pf >= _iob) && (pf <= (&_iob[_IOB_ENTRIES-1])) ) { /* * FILE lies in _iob[] so the lock lies in _locktable[]. */ _lock( _STREAM_LOCKS + (int)(pf - _iob) ); /* We set _IOLOCKED to indicate we locked the stream */ pf->_flag |= _IOLOCKED; } else /* * Not part of _iob[]. Therefore, *pf is a _FILEX and the * lock field of the struct is an initialized critical * section. */ EnterCriticalSection( &(((_FILEX *)pf)->lock) ); }
if ( (pf >= _iob) && (pf <= (&_iob[_IOB_ENTRIES-1])) ) 把fp和一个全局变量_iob比较，exe和DLL可能会有不同的全局变量，这导致fp不在_iob数组的范围内，导致出现错误。
解决的颁发是exe和DLL都动态连接到CRT，或者把DLL编译成静态库。
转自：http://blog.csdn.net/leechiyang/article/details/6873952
新闻热点
疑难解答
