"Linux" A simple example of thread creation and synchronization

Recently a lot of energy on Linux, today a simple look at Linux threads and synchronization, in fact, regardless of windows or linux,os layer of many principles and concepts are the same, many Windows experience and concepts can be completely ported to Linux.

Today, the creation thread and a blocking thread synchronization function are used.

A few of the functions used

#include <pthread.h>//Creating Threadsintpthread_create (pthread_t* Thread,/*line marker ID, pthread_t pthread_self (void) to get the current thread ID*/pthread_attr_t* attr,/*thread Properties, if no need can be 0*/void* (*start_routine) (void*),/*Thread Functions*/void* ARG/*Thread function Parameters*/); The return value succeeds:0Failure: Error code//terminating a threadvoidPthread_exit (void* retval/*the value returned when the thread returns, attention to local variables and other issues*/)//blocking-Thread synchronizationintpthread_join (pthread_t th,/*the value returned by the first parameter of the Pthread_create function*/void* * Thread/*thread function return value, memory allocated inside this function*/) //gets the current thread IDpthread_t pthread_self (void)

Paste the code

   /*a demo for Linux multithread*/  3#include <iostream>4#include <pthread.h>5#include <stdlib.h>6#include <unistd.h>7 using namespacestd; 8   9 //thread function Ten void* Start_routine (void*p) One {  A     if(0==p) -         return 0;  -   thesize_t nloops = * (size_t*) (p);  -   -      for(size_t i =0; i < Nloops; ++i) -     {  +cout << i <<Endl; -Usleep +* -);//Ms  +     }  A   atcout << Endl <<"This thread ID is"<< pthread_self () <<Endl; -   -     return 0;  - }  -   -   in intMain () - {  topthread_t PtThread1; +size_t* Ploops =Newsize_t (Ten);  -     intNret = Pthread_create (&ptthread1,0, Start_routine, (void*) ploops);  the     if(0!=nret) *Cerr << Endl <<"Create thread error!"<<Endl; $     Else Panax NotoginsengCerr << Endl <<"Create thread successfully, return value code is"<<Nret -<< Endl <<"Thread ID is"<< PtThread1 <<Endl; the   +     if(0==nret) A     {  thecout << Endl <<"Wait for thread"<< PtThread1 <<Endl; +         void* pRetVal =0;  -         intNjoinret = Pthread_join (PtThread1, (void* *) &pretval);  $cout << Endl <<"Thread"<< PtThread1 <<"finished!"<<Endl; $cout <<"thread return value is"<< (Char*) pRetVal <<Endl; -     }  -cout <<Endl; the   -Delete ploops;WuyiPloops =0;  the   -System"ls");  Wu   -     return 0;  About}

Execution results

PS: Note that you may need to add-lpthread to the g++ compilation parameters

"Linux" A simple example of thread creation and synchronization