禅城顺德网站建设,郑州平台类网站,百度云 wordpress 固定链接,吧网站做软件的软件Android源码目录hardware/ril/libril中总共包含5个C/CPP文件#xff0c;它们分别是ril_commands.h、ril_unsol_commands.h、ril_event.h、ril_event.cpp和ril.cpp。这篇文章主要分析ril.cpp文件。 我们可以将该文件划分为定义部分和实现部分#xff0c;先来看定义部分#x… Android源码目录hardware/ril/libril中总共包含5个C/CPP文件它们分别是ril_commands.h、ril_unsol_commands.h、ril_event.h、ril_event.cpp和ril.cpp。这篇文章主要分析ril.cpp文件。 我们可以将该文件划分为定义部分和实现部分先来看定义部分 #define LOG_TAG RILC #include hardware_legacy/power.h #include telephony/ril.h #include telephony/ril_cdma_sms.h #include cutils/sockets.h #include cutils/jstring.h #include cutils/record_stream.h #include utils/Log.h #include utils/SystemClock.h #include pthread.h #include binder/Parcel.h #include cutils/jstring.h #include sys/types.h #include pwd.h #include stdio.h #include stdlib.h #include stdarg.h #include string.h #include unistd.h #include fcntl.h #include time.h #include errno.h #include assert.h #include ctype.h #include alloca.h #include sys/un.h #include assert.h #include netinet/in.h #include cutils/properties.h #include ril_event.h namespace android { #define PHONE_PROCESS radio #define SOCKET_NAME_RIL rild #define SOCKET_NAME_RIL_DEBUG rild-debug #define ANDROID_WAKE_LOCK_NAME radio-interface #define PROPERTY_RIL_IMPL gsm.version.ril-impl // match with constant in RIL.java #define MAX_COMMAND_BYTES (8 * 1024) // Basically: memset buffers that the client library // shouldnt be using anymore in an attempt to find // memory usage issues sooner. #define MEMSET_FREED 1 // 常见的获取数组元素个数的方法 #define NUM_ELEMS(a) (sizeof (a) / sizeof (a)[0]) // 返回两数中较小者 #define MIN(a,b) ((a)(b) ? (a) : (b)) /* 回复类型经过请求的回复和未经请求的回复*/ #define RESPONSE_SOLICITED 0 #define RESPONSE_UNSOLICITED 1 /* Negative values for private RIL errnos */ #define RIL_ERRNO_INVALID_RESPONSE -1 // request, response, and unsolicited msg print macro // 即打印缓冲区printBuf的大小 #define PRINTBUF_SIZE 8096 // Enable RILC log #define RILC_LOG 0 #if RILC_LOG // 三个宏的调用顺序是startRequest - printRequest - closeRequest // 这样打印出来的请求命令将包含在中 #define startRequest sprintf(printBuf, () #define closeRequest sprintf(printBuf, %s), printBuf) #define printRequest(token, req) \ LOGD([%04d] %s %s, token, requestToString(req), printBuf) // 三个宏的调用顺序是startResponse - printResponse - closeResponse // 这样打印出来的回复信息将包含在中 #define startResponse sprintf(printBuf, %s {, printBuf) #define closeResponse sprintf(printBuf, %s}, printBuf) #define printResponse LOGD(%s, printBuf) #define clearPrintBuf printBuf[0] 0 #define removeLastChar printBuf[strlen(printBuf)-1] 0 #define appendPrintBuf(x...) sprintf(printBuf, x) #else #define startRequest #define closeRequest #define printRequest(token, req) #define startResponse #define closeResponse #define printResponse #define clearPrintBuf #define removeLastChar #define appendPrintBuf(x...) #endif // 唤醒类型不唤醒部分唤醒 enum WakeType {DONT_WAKE, WAKE_PARTIAL}; // 经过请求的回复结构体定义请求号命令分发处理函数返回结果响应函数 // 该结构体的取值见ril_commands.h文件 typedef struct { int requestNumber; void (*dispatchFunction) (Parcel p, struct RequestInfo *pRI); int(*responseFunction) (Parcel p, void *response, size_t responselen); } CommandInfo; //未经请求的回复结构体定义请求号事件响应函数唤醒类型 // 该结构体的取值见ril_unsol_commands.h文件 typedef struct { int requestNumber; int (*responseFunction) (Parcel p, void *response, size_t responselen); WakeType wakeType; } UnsolResponseInfo; // 请求信息结构体封装CommandInfo串成链表 typedef struct RequestInfo { int32_t token; //this is not RIL_Token CommandInfo *pCI; struct RequestInfo *p_next; char cancelled; char local; // responses to local commands do not go back to command process } RequestInfo; // 用户回调信息结构体 typedef struct UserCallbackInfo { RIL_TimedCallback p_callback; // 回调函数 void *userParam; // 回调函数的参数 struct ril_event event; // ril event struct UserCallbackInfo *p_next; // 指向下一个回调信息结构链表形式 } UserCallbackInfo; /*******************************************************************/ // 初始化回调结构 RIL_RadioFunctions s_callbacks {0, NULL, NULL, NULL, NULL, NULL}; static int s_registerCalled 0; static pthread_t s_tid_dispatch; // 分发处理线程ID static pthread_t s_tid_reader; // 读者线程ID static int s_started 0; // 文件描述符初始化 static int s_fdListen -1; static int s_fdCommand -1; static int s_fdDebug -1; static int s_fdWakeupRead; static int s_fdWakeupWrite; // 5个相关的事件 static struct ril_event s_commands_event; static struct ril_event s_wakeupfd_event; static struct ril_event s_listen_event; static struct ril_event s_wake_timeout_event; static struct ril_event s_debug_event; static const struct timeval TIMEVAL_WAKE_TIMEOUT {1,0}; // 初始化互斥量和条件变量 static pthread_mutex_t s_pendingRequestsMutex PTHREAD_MUTEX_INITIALIZER; static pthread_mutex_t s_writeMutex PTHREAD_MUTEX_INITIALIZER; static pthread_mutex_t s_startupMutex PTHREAD_MUTEX_INITIALIZER; static pthread_cond_t s_startupCond PTHREAD_COND_INITIALIZER; static pthread_mutex_t s_dispatchMutex PTHREAD_MUTEX_INITIALIZER; static pthread_cond_t s_dispatchCond PTHREAD_COND_INITIALIZER; static RequestInfo *s_pendingRequests NULL; static RequestInfo *s_toDispatchHead NULL; static RequestInfo *s_toDispatchTail NULL; static UserCallbackInfo *s_last_wake_timeout_info NULL; static void *s_lastNITZTimeData NULL; static size_t s_lastNITZTimeDataSize; #if RILC_LOG static char printBuf[PRINTBUF_SIZE]; // 缓存打印信息的数组 #endif /*******************************************************************/ // dispatch*系列函数是基带处理器对应用处理器请求的处理函数 static void dispatchVoid (Parcel p, RequestInfo *pRI); static void dispatchString (Parcel p, RequestInfo *pRI); static void dispatchStrings (Parcel p, RequestInfo *pRI); static void dispatchInts (Parcel p, RequestInfo *pRI); static void dispatchDial (Parcel p, RequestInfo *pRI); static void dispatchSIM_IO (Parcel p, RequestInfo *pRI); static void dispatchCallForward(Parcel p, RequestInfo *pRI); static void dispatchRaw(Parcel p, RequestInfo *pRI); static void dispatchSmsWrite (Parcel p, RequestInfo *pRI); static void dispatchCdmaSms(Parcel p, RequestInfo *pRI); static void dispatchCdmaSmsAck(Parcel p, RequestInfo *pRI); static void dispatchGsmBrSmsCnf(Parcel p, RequestInfo *pRI); static void dispatchCdmaBrSmsCnf(Parcel p, RequestInfo *pRI); static void dispatchRilCdmaSmsWriteArgs(Parcel p, RequestInfo *pRI); // response*系列函数是应用处理器对基带处理器消息的响应函数 // 包括请求回复响应函数和事件响应函数 static int responseInts(Parcel p, void *response, size_t responselen); static int responseStrings(Parcel p, void *response, size_t responselen); static int responseString(Parcel p, void *response, size_t responselen); static int responseVoid(Parcel p, void *response, size_t responselen); static int responseCallList(Parcel p, void *response, size_t responselen); static int responseSMS(Parcel p, void *response, size_t responselen); static int responseSIM_IO(Parcel p, void *response, size_t responselen); static int responseCallForwards(Parcel p, void *response, size_t responselen); static int responseDataCallList(Parcel p, void *response, size_t responselen); static int responseRaw(Parcel p, void *response, size_t responselen); static int responseSsn(Parcel p, void *response, size_t responselen); static int responseSimStatus(Parcel p, void *response, size_t responselen); static int responseGsmBrSmsCnf(Parcel p, void *response, size_t responselen); static int responseCdmaBrSmsCnf(Parcel p, void *response, size_t responselen); static int responseCdmaSms(Parcel p, void *response, size_t responselen); static int responseCellList(Parcel p, void *response, size_t responselen); static int responseCdmaInformationRecords(Parcel p,void *response, size_t responselen); static int responseRilSignalStrength(Parcel p,void *response, size_t responselen); static int responseCallRing(Parcel p, void *response, size_t responselen); static int responseCdmaSignalInfoRecord(Parcel p,void *response, size_t responselen); static int responseCdmaCallWaiting(Parcel p,void *response, size_t responselen); // 将数据结构信息转换成字符串输出 extern C const char * requestToString(int request); extern C const char * failCauseToString(RIL_Errno); extern C const char * callStateToString(RIL_CallState); extern C const char * radioStateToString(RIL_RadioState); #ifdef RIL_SHLIB extern C void RIL_onUnsolicitedResponse(int unsolResponse, void *data, size_t datalen); #endif static UserCallbackInfo * internalRequestTimedCallback (RIL_TimedCallback callback, void *param, const struct timeval *relativeTime); /** Index requestNumber */ // 很不错的一个用法由于数组元素太多为了代码的整洁清晰 // 将数组元素的定义放在一个单独的头文件中并用#include进来即可 static CommandInfo s_commands[] { #include ril_commands.h }; static UnsolResponseInfo s_unsolResponses[] { #include ril_unsol_commands.h };To Be Continued
