mpiu_memcpy.tex

来自「刚才是说明 现在是安装程序在 LINUX环境下进行编程的MPICH安装文件」· TEX 代码 · 共 40 行

\startmanpage
\mantitle{MPIU{\tt \char`\_}Memcpy}{tex}{10/7/2002}
\manname{MPIU{\tt \char`\_}Memcpy}
--- Copy memory 
\subhead{Synopsis}
\startvb\begin{verbatim}
void *MPIU_Memcpy( void *dest, const void *src, size_t n )

\end{verbatim}
\endvb

\subhead{Input Parmeters}
\startarg{src }{Pointer to memory to copy
}
\startarg{n   }{Number of bytes to copy
}
\par
\subhead{Output Parameters}
\startarg{dest }{Pointer to destination to copy {\tt src} into.
}
\par
\subhead{Return value}
Also {\tt dest}.
\par
\subhead{Notes}
{\tt MPID{\tt \char`\_}Memcpy} is included because on some systems, faster memory copies
can be written than are provided by the system libraries.  For example,
system routines may be prohibited from using wide load and store operations,
while user-code and other libraries (such as MPICH) are allowed to use
these faster instructions.  On systems where the {\tt memcpy} routine is
efficient, this routine may be defined as
\begin{verbatim}
 #define MPID_Memcpy( dest, src, n ) memcpy( dest, src, n )
\end{verbatim}

\par
\subhead{Module}
Utility
\endmanpage