Linux多线程编程，替代sleep的几种方式

#include <stdio.h>
[o$S3]7~ gG4eF0#include <stdlib.h>

int flag = 1;51Testing软件测试网_#WWK A"K8Pr
void * thr_fn(void * arg) {

\
VU/~N\ ~)R0  while (flag){
5uR/?5i#~0    printf("******\n");51Testing软件测试网5iA!CSFk8P&cP
    sleep(10);51Testing软件测试网3gL+bB7W0i)d1mG t
  }
"D.z-\ I*H
KU'Qn;r9w0  printf("sleeptestthread exit\n");
;?*e_cs0}51Testing软件测试网 g&a4c*V,x6AM9?{
 51Testing软件测试网9f'C'l J,D$u
int main() {51Testing软件测试网"b F x6\ Z'yA1|P `
  pthread_t thread;
?#g3p)S0I6u0  if (0 != pthread_create(&thread, NULL, thr_fn, NULL)) {51Testing软件测试网r
^.}.[)^
    printf("error when create pthread,%d\n", errno);51Testing软件测试网\6{\;V
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M
    return 1;51Testing软件测试网&]5\&o+VbMQI
  }
u[ Vo)pE)TF0 51Testing软件测试网#xb$P_*KaKa
  char c ;
gt
NKf8b"A0  while ((c = getchar()) != 'q');
rK-G/FMv b;YE3q/S0 
&NqR Hj5u/Q0  printf("Now terminate the thread!\n");51Testing软件测试网J2S4Lr5C}F#m
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  flag = 0;51Testing软件测试网V)Ns+x$nG kb"]P
  printf("Wait for thread to exit\n");51Testing软件测试网P(m/N_k]b"e
  pthread_join(thread, NULL);51Testing软件测试网'M*VxJ2y2w
  printf("Bye\n");51Testing软件测试网b.A b,PE&C
  return 0;
0G'rR:u8MO0}

#include <stdio.h>51Testing软件测试网;B y#gH#{r8]]5@\ W
#include <sys/time.h>
Bs?a:h [ \Ao0#include <unistd.h>
Z0@3N uY C3w;l[v7t0#include <pthread.h>
D6Wu1X5t'x8|%J!_0#include <errno.h>
!v2e'^S0nQ|.w0 51Testing软件测试网c3IwM(ei%?[~
static pthread_t thread;
td+q6L-r8Q0static pthread_cond_t cond;
qa|3gW`0static pthread_mutex_t mutex;

W#L6e#@G6Wm`2T0static int flag = 1;51Testing软件测试网~ g9xK)r2V
 51Testing软件测试网l8N^jaa'HB'D
void * thr_fn(void * arg)

YD0d*W-@ vzI#K ^7C@0{51Testing软件测试网 Z:Qe jOa'a/z x7F5m ~
  struct timeval now;51Testing软件测试网l4_8K qYVQZ
  struct timespec outtime;
c!_'sZ;YmmBqC0  pthread_mutex_lock(&mutex);51Testing软件测试网J(g/l6K0`#Qe!~
  while (flag) {51Testing软件测试网J8AbXq7R6I
    printf("*****\n");51Testing软件测试网
T:E }6Ky
    gettimeofday(&now, NULL);
5m&f&N2coI0yfZ)B0    outtime.tv_sec = now.tv_sec + 5;51Testing软件测试网r cd:u3fM
    outtime.tv_nsec = now.tv_usec * 1000;51Testing软件测试网[4F;B`-]
    pthread_cond_timedwait(&cond, &mutex, &outtime);
?,^+` b+hBTv0  }51Testing软件测试网+cKEv#_pO1b
  pthread_mutex_unlock(&mutex);51Testing软件测试网.K)k4JWS;c
  printf("cond thread exit\n");
IH.o1zW0}51Testing软件测试网&R"A-d {#`e
 51Testing软件测试网ao:hQ7a.jHU
int main(void)51Testing软件测试网'zB3f%Ia8U
{51Testing软件测试网~z#_+D _.o)io(W9G
  pthread_mutex_init(&mutex, NULL);
m/UK-sF8Pe&G0  pthread_cond_init(&cond, NULL);
W$jU P$FI5V0  if (0 != pthread_create(&thread, NULL, thr_fn, NULL)) {51Testing软件测试网f:~D$tZ p
    printf("error when create pthread,%d\n", errno);
-K%FQ$h7G/e)gh:n0    return 1;
SY:} @8I{-Rx0  }51Testing软件测试网[ _%G/w`![
b:h
  char c ;51Testing软件测试网1ncOH6V$Y&H!n
  while ((c = getchar()) != 'q');
#X}8HJ/t0  printf("Now terminate the thread!\n");

  pthread_mutex_lock(&mutex);51Testing软件测试网d1^xK&]i[,N}b
  flag = 0;
!kg](xV&bH0  pthread_cond_signal(&cond);
)f6v
R'n(b`5x'l3R0  pthread_mutex_unlock(&mutex);
5O&P%_sG0q.E0  printf("Wait for thread to exit\n");
Ov]*T;\rYi0  pthread_join(thread, NULL);51Testing软件测试网3q}0ny Ef#w
  printf("Bye\n");51Testing软件测试网)Cy)j}#n'D?
  return 0;
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