status_machine(用于状态管理)

一般常用于状态交互

/*file name: status_machine.c author: zhongjundescription: status_machine demodata: 20150630time: AM 10:06key(study): 预处理器 & enum & typedef & struct & malloc & memset*/#include <stdio.h>#define DEBUG_STATUS#ifdef DEBUG_STATUS#define DEBUG(x) {printf x;}#define STATUS_DEBUG(x) DEBUG(x)#else#define STATUS_DEBUG(x) #endiftypedef enum {    HF_INITIALISING,HF_READY,HF_DISCONNECTING,HF_CONNECTING,HF_CONNECTED,HF_INCOMING_CALL_ESTABLISH,HF_OUTGOING_CALL_ESTABLISH,HF_ACTIVE_CALL,HF_3WAY_CALL_WAITING,HF_3WAY_MULTICALL,HF_3WAY_CALL_ON_HOLD,HF_INCOMING_CALL_ON_HOLD} AnwHfStateType;typedef struct{    AnwHfStateTypehfpstate ; unsigned charSCO_Link_connect :8;unsigned charanswerButton_ChangeTo_Transfer :8;    }AnwDeviceManager;AnwDeviceManager  *devicemanager ;void SetHfpState ( AnwHfStateType state );AnwDeviceManager*  GetDeviceManager(void);int main(){devicemanager = (AnwDeviceManager*)malloc(sizeof(AnwDeviceManager));memset(devicemanager, 0, sizeof(AnwDeviceManager));devicemanager->hfpstate = HF_READY;SetHfpState(HF_CONNECTED);return 0;}void SetHfpState (AnwHfStateType state){devicemanager->hfpstate = state; STATUS_DEBUG(("Set HfpState (%d)\n", state));}AnwDeviceManager*  GetDeviceManager(void){    return devicemanager;}