在openmp中突破结构化块 [英] breaking out of structured block in openmp

问题描述

我正在尝试使用openmp编写程序，其中结构块是while循环.

I am trying to write a program using openmp in which the structure block is a while loop.

#pragma omp parallel num_threads(x)
while(condition){

}

我必须决定对任何线程停止的条件进行编码的方式.我需要知道在while循环中使用break语句是否合适.

I have to decide upon the way to code the condition on which any thread would stop. I need to know if it is proper to have a break statement in the while loop.

推荐答案

您的问题有点不完整.您说过"任何线程都会停止的条件"，但是之后的数学呢:

Your Question is a bit incomplete. You said "Condition on Which any thread would stop", but what about the after math:

1. 其余线程也应退出.
2. 其余线程应继续进行，直到它们符合条件为止.

情况1:

bool abort = 0;
#pragma omp parallel num_threads(x) private(abort)
{
   while(!abort)
   {
      // The work you need to do.
      #pragma omp critical
      {
          if(condition==false)
          {
             abort = 1; 
          }
      }
   }
}

情况2:

#pragma omp parallel num_threads(x)
{
    while(condition)
   {
        // The work you need to do.
   }
}

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