static void onRequest (int request, void *data, size_t datalen, RIL_Token t)
{switch (request) {case RIL_REQUEST_DIAL:requestDial(data, datalen, t);break;……}
}

static void requestDial(void *data, size_t datalen, RIL_Token t)
{RIL_Dial *p_dial;char *cmd;//转化成AT命令p_dial = (RIL_Dial *)data;asprintf(&cmd, "ATD%s%s;", p_dial->address, clir);//发送AT命令ret = at_send_command(cmd, NULL);//请求处理完成回调RIL_onRequestComplete(t, RIL_E_SUCCESS, NULL, 0);
}

static int at_send_command_full_nolock (const char *command, ATCommandType type,……)
{//将数据写入到mdoem设备文件节点中err = writeline (command);//休眠等待写入的数据被读取while (sp_response->finalResponse == NULL && s_readerClosed == 0) {err = pthread_cond_wait(&s_commandcond, &s_commandmutex);}return err;
}

static int writeline (const char *s)
{//写入数据到设备文件描述符s_fdwhile (cur < len) {do {written = write (s_fd, s + cur, len - cur);} while (written < 0 && errno == EINTR);cur += written;}//返回行首do {written = write (s_fd, "\r" , 1);} while ((written < 0 && errno == EINTR) || (written == 0));return 0;
}

int main(int argc, char **argv)
{    //处理客户端请求的模块reference-ril.c    调用RIL_Initfuncs_inst[0] = rilInit(&s_rilEnv, argc, s_argv);……
}

RIL_RadioFunctions *RIL_Init(const struct RIL_Env *env, int argc, char **argv)
{//交互的接口s_rilenv = env;//提取modem设备端口或者路径 //此处是d 根据前面属性系统获取参数：rild.libargs=-d /dev/ttyS0// getopt的使用 提取选项while ( -1 != (opt = getopt(argc, argv, "p:d:s:c:"))) {switch (opt) {case 'd':s_device_path = optarg;break;}}//创建线程s_tid_mainloopret = pthread_create(&s_tid_mainloop, &attr, mainLoop, NULL);//返回请求交互的接口return &s_callbacks;
}

static void *mainLoop(void *param)
{at_set_on_reader_closed(onATReaderClosed);at_set_on_timeout(onATTimeout);for (;;) {fd = open (s_device_path, O_RDWR);s_closed = 0;ret = at_open(fd, onUnsolicited);RIL_requestTimedCallback(initializeCallback, NULL, &TIMEVAL_0);// Give initializeCallback a chance to dispatched, since// we don't presently have a cancellation mechanismsleep(1);waitForClose();}
}

int at_open(int fd, ATUnsolHandler h)
{//与modem设备通信文件描述符s_fd = fd;//网络端传来事件请求处理onUnsoliciteds_unsolHandler = h;s_readerClosed = 0;//创建线程s_tid_readerret = pthread_create(&s_tid_reader, &attr, readerLoop, &attr);return 0;
}

static void *readerLoop(void *arg)
{for (;;) {//从与modem通信设备端口读取数据line = readline();if (line == NULL) {break;}//处理数据
        processLine(line);}onReaderClosed();return NULL;
}

static void processLine(const char *line)
{if (sp_response == NULL) {//来自网络端事件
        handleUnsolicited(line);} else if (isFinalResponseSuccess(line)) {//客户端请求处理返回sp_response->success = 1;handleFinalResponse(line);} ……
}

static void handleUnsolicited(const char *line)
{// 回调接口onUnsolicitedif (s_unsolHandler != NULL) {s_unsolHandler(line, NULL);}
}

static void handleFinalResponse(const char *line)
{//保存modem端响应请求所传递的数据sp_response->finalResponse = strdup(line);//发送signal 唤醒等待s_commandcond的线程——Event Looppthread_cond_signal(&s_commandcond);
}