mpid_max_thread_level.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 28 行

\startmanpage
\mantitle{MPID{\tt \char`\_}MAX{\tt \char`\_}THREAD{\tt \char`\_}LEVEL}{tex}{10/7/2002}
\manname{MPID{\tt \char`\_}MAX{\tt \char`\_}THREAD{\tt \char`\_}LEVEL}
--- Indicates the maximum level of thread support provided at compile time. 
\subhead{Values}
Any of the {\tt MPI{\tt \char`\_}THREAD{\tt \char`\_}xxx} values (these are preprocessor-time constants)
\par
\subhead{Notes}
The macro {\tt MPID{\tt \char`\_}MAX{\tt \char`\_}THREAD{\tt \char`\_}LEVEL} defines the maximum level of
thread support provided, and may be used at compile time to remove
thread locks and other code needed only in a multithreaded environment.
\par
A typical use is
\begin{verbatim}
  #if MPID_MAX_THREAD_LEVEL >= MPI_THREAD_MULTIPLE
     lock((r)->lock_ptr);
     (r)->ref_count++;
     unlock((r)->lock_ptr);
  #else
     (r)->ref_count ++;
  #fi
\end{verbatim}

\par
\subhead{Module}
Environment-DS
\endmanpage