62. Multi-threaded multiple file retrieval, each thread retrieves a file that is used in case of insufficient memory

1 #define_crt_secure_no_warnings2#include <stdio.h>3#include <stdlib.h>4#include <string.h>5#include <memory.h>6#include <process.h>7#include <Windows.h>8 //multi-threaded multiple files for thread scheduling9 //Freeing MemoryTen //in case of insufficient memory, queue up to complete the task One  A //To create a multithreaded fabric body - structinfos - { the     //Path -     Charpath[ the]; -     //Thread ID -     intID; +     //load the contents of the file into -     Char**g_pp; +     //Length of File A     intlength; at     //the data to query -     Charfindstr[ -]; -}myinfo[ A] = {0};//22 Structures Save 22 files of information -HANDLE inithd[ A] = {0};//22 Initialize thread address -HANDLE findhd[ A] = {0};//22 Find thread addresses -  in //initializes the thread address according to the path and writes the data to the infos struct - voidRunthreadinit (void*p) to { +     structInfos *pinfo =p; -FILE *PF = fopen (Pinfo->path,"R"); the     if(pf!=NULL) *     { $         //test how many rowsPanax Notoginseng         inti =0; -          while(!feof (PF)) the         { +             Charstr[ the] = {0 }; AFgets (str, the, PF);//Read thei++; +         } -         //I record the number of rows $Rewind (PF);//back to the beginning fseek (pf,0,seek_set); $PINFO-&GT;G_PP = Calloc (i,sizeof(Char*));//Allocating memory Initialization -Pinfo->length = i;//record length -  the         //Read and copy data to G_pp[i] -          for(intj =0; J < i;j++)Wuyi         { the             Charstr[ the] = {0 }; -             //Read WuFgets (str, the, pf); -             //Get length About             intLength =strlen (str); $             //Allocating Memory -PINFO-&GT;G_PP[J] = calloc (length +1,sizeof(Char)); -             //Copy to **g_pp -             if(pinfo->g_pp[j]!=NULL) A             { +strcpy (pinfo->g_pp[j], str); the             } -         } $     }  the     //Close File the fclose (PF); theprintf"thread%d init over\n", pinfo->ID); the } -  in //Calling thread functions the voidRunthreadsearch (void*p) the { About     //pointer type conversions the     structInfos *pinfo =p; the     //each thread is retrieved accordingly. the      for(inti =0; I < pinfo->length;i++) +     { -         if(pinfo->g_pp[i]!=NULL) the         {Bayi             Char*PX = Strstr (Pinfo->g_pp[i], pinfo->findstr); the             if(px!=NULL) the             { -printf"\n%s", pinfo->g_pp[i]); -             } the         } the     } the  theprintf"thread%d find over\n", pinfo->ID); - } the  the //Freeing Memory the voidFreeall (structInfos *pinfo)94 { theprintf"Freeall Start"); the     //releases the pointer array for each pointer to the memory the      for(inti =0; I < pinfo->length;i++)98     { AboutFree (pinfo->g_pp[i]); -     }101Free (PINFO-&GT;G_PP);//Release G_pp102 103printf"Freeall end;");104  the }106 107 voidMain ()108 {109     //initializes the address and string to be queried for the thread struct the      for(inti =0; I < the; i++)111     { theMyinfo[i].id = i+1;113sprintf (Myinfo[i].path,"Dangdangwang%d.txt", i +1); thestrcpy (MYINFO[I].FINDSTR,"Xiao Wang"); the     } the 117     //initialize struct based on address118      for(inti =0; I < the; i++)119     { -Inithd[i] = _beginthread (Runthreadinit,0, &myinfo[i]);121     }122     //wait123WaitForMultipleObjects ( the, INITHD, TRUE, INFINITE);124System"Pause"); the 126     //executing a lookup thread127      for(inti =0; I < the; i++) -     {129Findhd[i] = _beginthread (Runthreadsearch,0, &myinfo[i]); the     }    131     //wait theWaitForMultipleObjects ( the, FINDHD, TRUE, INFINITE);133System"Pause");134 135     //Free All Memory136printf"Start Releasing");137      for(inti =0; I < the; i++)138     {139Freeall (&myinfo[i]); $     }141printf"End Release");142 143System"Pause");144}

62. Multi-threaded multiple file retrieval, each thread retrieves a file that is used in case of insufficient memory