Linux多线程实例练习 - pthread_create()
2015-01-29 09:51
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Linux多线程实例练习 pthread_create():创建一个线程
1、代码如下 xx_pthread_create.c
2、CentOS 下编译通过
3、运行结果
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
#include <pthread.h> #include <stdio.h> #include <unistd.h> #include <sys/time.h> // for gettimeofday #define debugMsg(fmt, arg...)\ do{\ unsigned long lSec = 0; unsigned long lUSec = 0;\ getTimeuSec(&lSec, &lUSec);\ printf("[%ld.%06ld]:", lSec, lUSec);\ printf(fmt, ##arg);\ }while(0) int getTimeuSec(unsigned long *lSec, unsigned long *lUSec) { struct timeval start; gettimeofday( &start, NULL ); *lSec = start.tv_sec; *lUSec = start.tv_usec; return 0; } void * doPrint(void *arg) { int i = 0; while(i < 30) { debugMsg("pthread %2d; main %d\n", i++, *(int*)arg); usleep(200000); } return NULL; } int main() { pthread_t pid; int iX = 123; pthread_create(&pid, NULL, doPrint, &iX); while(iX <= 20 + 123) { debugMsg("main : %d\n", iX++); usleep(300000); } return 0; }
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
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