Linux多线程实例练习 pthread_create()：创建一个线程
int pthread_create(pthread_t *tidp, const pthread_attr_t *attr, (void*)(*start_rtn)(void*), void *arg);
1、代码如下 xx_pthread_create.c
1 #include <pthread.h> 2 #include <stdio.h> 3 #include <unistd.h> 4 #include <sys/time.h> // for gettimeofday 5 6 #define debugMsg(fmt, arg...) 7 do{ 8 unsigned long lSec = 0; unsigned long lUSec = 0; 9 getTimeuSec(&lSec, &lUSec); 10 printf("[%ld.%06ld]:", lSec, lUSec); 11 printf(fmt, ##arg); 12 }while(0) 13 14 int getTimeuSec(unsigned long *lSec, unsigned long *lUSec) 15 { 16 struct timeval start; 17 gettimeofday( &start, NULL ); 18 *lSec = start.tv_sec; 19 *lUSec = start.tv_usec; 20 21 return 0; 22 } 23 void * doPrint(void *arg) 24 { 25 int i = 0; 26 while(i < 30) 27 { 28 debugMsg("pthread %2d; main %d ", i++, *(int*)arg); 29 usleep(200000); 30 } 31 32 return NULL; 33 } 34 35 int main() 36 { 37 pthread_t pid; 38 int iX = 123; 39 pthread_create(&pid, NULL, doPrint, &iX); 40 while(iX <= 20 + 123) 41 { 42 debugMsg("main : %d ", iX++); 43 usleep(300000); 44 } 45 46 return 0; 47 }
2、CentOS 下编译通过
g++ -g -c -o xx_pthread_create.o xx_pthread_create.c
g++ -g -o xx_pthread_create xx_pthread_create.o -lpthread
3、运行结果
[1422496189.763862]:main : 123 [1422496189.764341]:pthread 0; main 124 [1422496189.965627]:pthread 1; main 124 [1422496190.065601]:main : 124 [1422496190.166510]:pthread 2; main 125 [1422496190.366393]:main : 125 [1422496190.367391]:pthread 3; main 126 [1422496190.568275]:pthread 4; main 126 [1422496190.667215]:main : 126 [1422496190.769157]:pthread 5; main 127 [1422496190.968039]:main : 127 [1422496190.970323]:pthread 6; main 128 [1422496191.171922]:pthread 7; main 128 [1422496191.269869]:main : 128 [1422496191.373803]:pthread 8; main 129 [1422496191.571696]:main : 129 [1422496191.574958]:pthread 9; main 130 [1422496191.776566]:pthread 10; main 130 [1422496191.873512]:main : 130 [1422496191.977457]:pthread 11; main 131 [1422496192.174348]:main : 131 [1422496192.178362]:pthread 12; main 132 [1422496192.379214]:pthread 13; main 132 [1422496192.475159]:main : 132 [1422496192.580095]:pthread 14; main 133 [1422496192.776006]:main : 133 [1422496192.781267]:pthread 15; main 134 [1422496192.981968]:pthread 16; main 134 [1422496193.076864]:main : 134 [1422496193.182797]:pthread 17; main 135 [1422496193.377656]:main : 135 [1422496193.384089]:pthread 18; main 136 [1422496193.584595]:pthread 19; main 136 [1422496193.678472]:main : 136 [1422496193.785406]:pthread 20; main 137 [1422496193.980296]:main : 137 [1422496193.987689]:pthread 21; main 138 [1422496194.189201]:pthread 22; main 138 [1422496194.281149]:main : 138 [1422496194.390049]:pthread 23; main 139 [1422496194.582987]:main : 139 [1422496194.590944]:pthread 24; main 140 [1422496194.792793]:pthread 25; main 140 [1422496194.883821]:main : 140 [1422496194.993852]:pthread 26; main 141 [1422496195.184826]:main : 141 [1422496195.195665]:pthread 27; main 142 [1422496195.397447]:pthread 28; main 142 [1422496195.486468]:main : 142 [1422496195.598408]:pthread 29; main 143 [1422496195.787329]:main : 143