android关于native中Thread类的使用源码解析

system\core\libutils\include\utils\Thread.h
system\core\libutils\Threads.cpp
class Thread : virtual public RefBase
Thread继承RefBase，有以下的一些特性
// Invoked after creation of initial strong pointer/reference.
virtual void            onFirstRef();

#include <utils/Log.h>
#include <pthread.h>
#include "TestThread.h"
#ifdef LOG_TAG
#undef LOG_TAG
#endif
#define LOG_TAG "hello_test"
using namespace android;
int main(int args,char** argv) {
    ALOGD("main start TestThread");
    // TestThread
    sp<TestThread> testThread = new TestThread;
    testThread->run("TestThread", PRIORITY_URGENT_DISPLAY);
    while(1){
        if(!testThread->isRunning()){
            break;
        }
    }
     ALOGD("main end");
    return 0;
}

cc_binary{
    name:"hello_test",
    srcs:[
        "main.cpp",
        "TestThread.cpp",
    ],
    shared_libs:[
        "liblog",
        "libutils",
    ],
    cflags: [
            "-Wno-error",
            "-Wno-unused-parameter",
        ],
}

//
// Created by xxx on 25-6-8.
//
#ifndef ANDROID_TESTTHREAD_H
#define ANDROID_TESTTHREAD_H
#include <utils/threads.h>
#include <utils/Log.h>
namespace android {
    class TestThread : public Thread {
        public:
            TestThread();
            virtual void        onFirstRef();
            virtual status_t    readyToRun();
            virtual bool        threadLoop();
            virtual void        requestExit();
        private:
            int cnt = 0;
    };
}
#endif //ANDROID_TESTTHREAD_H

//
// Created by xxx on 25-6-8.
//
#include "TestThread.h"
namespace android{
    TestThread::TestThread():Thread(false) {
        ALOGD("TestThread");
    }
    void TestThread::onFirstRef(){
        ALOGD("onFirstRef");
    }
    status_t  TestThread::readyToRun(){
        ALOGD("readyToRun");
        return OK;
    }
    bool TestThread::threadLoop() {
        cnt++;
        ALOGD("threadLoop cnt = %d",cnt);
        if(cnt >= 20){
           return false;
        }
        return true;
    }
    void  TestThread::requestExit(){
        ALOGD("requestExit");
    }
}