thread.cpp

#include<iostream>
#include<unistd.h>
#include<sys/types.h>
#include<pthread.h>
#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<string.h>

#include"thread.h"

staticint g_tid = 0;

staticintfib(int n){
switch (n) {
case0: return1;
case1: return1;
default: return (fib(n-2) + fib(n-1));
 }
}

void * thread_proc(void* ctx)
{
int tid = g_tid++;

char thread_name[16];
sprintf(thread_name, "Thread %d", tid);
#ifdef __APPLE__
pthread_setname_np(thread_name);
#else
pthread_setname_np(pthread_self(), thread_name);
#endif

// Random delay, 0 - 0.5 sec
timespec ts;
 ts.tv_sec = 0;
 ts.tv_nsec = 500000000 + ((float)rand() / (float)RAND_MAX) * 500000000;
nanosleep(&ts, NULL);

volatileint i = 0;
while (i <= 30) {
 std::cout << "Thread " << tid << ": fib(" << i << ") = " << fib(i) << std::endl;
 i++;
nanosleep(&ts, NULL);
 }

 std::cout << thread_name << " exited!" << std::endl;
}