如何在MPICH中传递结构体类型?

我想通过MPI_Gather()和MPI_Bcast()进行通讯,传递的数据是类型为如下结构体的currentbest:  
  struct   individual{  
  int   chrom[LENGTH];  
  int   realchrom[LENGTH];  
  double   value;  
  };  
  struct   individual   currentbest;  
  请问如何定义数据类型MPI_Datatype? 问题点数：30、回复次数：1Top

1 楼lightnut（）回复于 2006-05-01 03:05:18 得分 30

int   blockLens[3]   =   {LENGTH,   LENGTH,   1};    
  MPI_Datatype   type[3]   =   {MPI_INT,   MPI_INT,   MPI_DOUBLE};  
  MPI_Aint   disp[3];  
  MPI_Address(   &currentbest,   &disp[0]   );  
  MPI_Address(   &currentbest.realchrom[0],   &disp[1]   );  
  MPI_Address(   &currentbest.value,   &disp[2]);  
  disp[2]   =   disp[2]   -   disp[0];  
  disp[1]   =   disp[1]   -   disp[0];  
  disp[0]   =   0;  
   
  MPI_Datatype   individualType;  
  MPI_Type_struct(1,   blockLens,   disp,   type,   &individualType);  
  MPI_Type_commit(&individualType);  
   
  .....//using   the   individualType  
   
  MPI_Type_free(&individualType);  
  Top

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