48 lines
1.0 KiB
C++
48 lines
1.0 KiB
C++
#include <iostream>
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#include <unistd.h>
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#include <sys/types.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <string.h>
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#include "thread.h"
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static int g_tid = 0;
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static int fib(int n){
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switch (n) {
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case 0: return 1;
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case 1: return 1;
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default: return (fib(n-2) + fib(n-1));
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}
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}
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void * thread_proc(void* ctx)
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{
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int tid = g_tid++;
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char thread_name[16];
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sprintf(thread_name, "Thread %d", tid);
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#ifdef __APPLE__
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pthread_setname_np(thread_name);
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#else
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pthread_setname_np(pthread_self(), thread_name);
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#endif
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// Random delay, 0 - 0.5 sec
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timespec ts;
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ts.tv_sec = 0;
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ts.tv_nsec = 500000000 + ((float)rand() / (float)RAND_MAX) * 500000000;
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nanosleep(&ts, NULL);
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volatile int i = 0;
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while (i <= 30) {
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std::cout << "Thread " << tid << ": fib(" << i << ") = " << fib(i) << std::endl;
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i++;
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nanosleep(&ts, NULL);
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}
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std::cout << thread_name << " exited!" << std::endl;
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} |