头文件
#include<pthread.h>
函数声明
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返回值
若线程创建成功，则返回0。若线程创建失败，则返回出错编号，并且*thread中的内容是未定义的。
返回成功时，由tidp指向的内存单元被设置为新创建线程的线程ID。attr参数用于指定各种不同的线程属性。新创建的线程从start_rtn函数的地址开始运行，该函数只有一个万能指针参数arg，如果需要向start_rtn函数传递的参数不止一个，那么需要把这些参数放到一个结构中，然后把这个结构的地址作为arg的参数传入。
参数
第二个参数用来设置线程属性。
第三个参数是线程运行函数的起始地址。
最后一个参数是运行函数的参数。
传参数
1.传多个参数：封装成结构体
typedef struct args{ int id; char * name; } ARGS;
#include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <pthread.h> #include "log.h" #include "test.h" int * thread(void * arg) { pthread_t newthid; ARGS *args = (ARGS *)arg; newthid = pthread_self(); LOGI(LOG_TAG,"this is a new thread, args->id = %d\n", args->id); LOGI(LOG_TAG,"this is a new thread, args->name = %s\n", args->name); return 0; } int main(void) { pthread_t thid; LOGI(LOG_TAG,"main thread ,ID is %ld\n",pthread_self()); ARGS *args; args->id = 10; args->name ="test"; //int j=10; if(pthread_create(&thid, NULL, thread, args) != 0) { LOGI(LOG_TAG,"thread creation failed\n"); } }
I/jniTest: this is a new thread, args->id = 10 I/jniTest: this is a new thread, args->name = test
2.传单个参数
int * thread(void * arg) { pthread_t newthid; newthid = pthread_self(); int j = (int *)arg; LOGI(LOG_TAG,"this is a new thread, j = %d\n", j); return 0; } int main(void) { pthread_t thid; LOGI(LOG_TAG,"main thread ,ID is %ld\n",pthread_self()); int j=10; if(pthread_create(&thid, NULL, thread, j) != 0) { LOGI(LOG_TAG,"thread creation failed\n"); } }
int * thread(void * arg) { pthread_t newthid; newthid = pthread_self(); char* j = (char *)arg; LOGI(LOG_TAG,"this is a new thread, j = %s\n", j); return 0; } int main(void) { pthread_t thid; LOGI(LOG_TAG,"main thread ,ID is %ld\n",pthread_self()); char *j="10"; if(pthread_create(&thid, NULL, thread, j) != 0) { LOGI(LOG_TAG,"thread creation failed\n"); } }
3.不传参数
pthread_create(&thid, NULL, thread, NULL)
