#include <stdio.h> #include <stdlib.h> #include <uuid/uuid.h> #include <unistd.h> #include <fstream> #include <istream> #include <ostream> #include <sstream> #include <string.h> #include <iostream> #include <chrono> void retrieveUuid(char *uuidValue) { uuid_t newUUID; uuid_generate(newUUID); uuid_unparse(newUUID, uuidValue); } void *printBookStruct(void *structP); void mp12(); int main() { mp12(); return 0; } void mp12() { struct BookStruct arr[100]; for (int i = 0; i < 100; i++) { arr[i].BookId = i * i * i * i; arr[i].BookName = (char *)malloc(40); arr[i].BookTitle = (char *)malloc(40); retrieveUuid(arr[i].BookName); retrieveUuid(arr[i].BookTitle); } pthread_t tds[100]; struct BookStruct *p; for(int i=0;i<100;i++) { cout<<"Thread "<<i<<",started!"; pthread_create(&tds[i],NULL,printBookStruct,(void*)&arr[i]); pthread_join(tds[i],NULL); cout<<"Thread "<<i<<" finished!"<<endl; }
pthread_exit(NULL);
}
void *printBookStruct(void *structP) { struct BookStruct *p; p=(struct BookStruct*)(structP); if(p!=nullptr) { printf("BookId=%d,Name=%s,Title=%s!",p->BookId,p->BookName,p->BookTitle); free(p->BookName); free(p->BookTitle); } pthread_exit(NULL); }
Compile via g++ as below command
g++ -g -std=c++2a -I. h1.cpp -o h1 -luuid -lpthread
Run the complile result as below
./h1
The executed result as below
The keylocated at the invoked method. should modified by void * AKS void pointer method and the parameter should convert to void pointer and in the method should convert the void pointer to specific pointer
pthread_create(&tds[i],NULL,printBookStruct,(void*)&arr[i]); void *printBookStruct(void *structP) { struct BookStruct *p; p=(struct BookStruct*)(structP); if(p!=nullptr) { printf("BookId=%d,Name=%s,Title=%s!",p->BookId,p->BookName,p->BookTitle); free(p->BookName); free(p->BookTitle); }
pthread_exit(NULL); return nullptr; }
原文链接: https://www.cnblogs.com/Fred1987/p/15679349.html
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