linux下C++实现插件功能

#include "extendinterface.h" #include "callbackfunction.h" #include <dlfcn.h> #include <dirent.h> //扩展接口类定义 ExtendInterface g_interface; ExtendInterface::ExtendInterface() { } ExtendInterface::~ExtendInterface() { } void ExtendInterface::InitInterface() { DIR *dp = opendir("/opt/kira/lib/"); if(NULL == dp){ printf("open lib dir error.\n"); return; } char szFile[PATH_MAX] = {0}; size_t ndirOffset = strlen("/opt/kira/lib/"); memcpy(szFile, "/opt/kira/lib/", ndirOffset); for(struct dirent* dirp = readdir(dp); dirp != NULL; dirp = readdir(dp)) { //调过.和..目录 if(strcmp(dirp->d_name,".")==0 || strcmp(dirp->d_name,"..")==0) continue; //结合前面的目录拼组完整文件名 memset(&szFile[ndirOffset], 0, sizeof(szFile)-ndirOffset); strcpy(&szFile[ndirOffset], dirp->d_name); printf("dlopen %s\n", dirp->d_name); //打开库文件 //RTLD_LAZY 暂缓决定，等有需要时再解出符号 //RTLD_NOW 立即决定，返回前解除所有未决定的符号。 void* handle = dlopen(szFile, RTLD_NOW); if(!handle){ printf("dlopen err: %s\n", dlerror()); continue; } //获取版本信息 Extend_GetTagVersion fn = (Extend_GetTagVersion)dlsym(handle, "Extend_GetTagVersion"); if(!fn){ printf("%s is not extend\n", dirp->d_name); dlclose(handle); }else{ //初始化对外接口 ExternalFunction(handle); //初始化插件 char cVer[32] = {0}; char cTag[32] = {0}; fn(cTag, cVer); if(strlen(cTag)<=0 || strlen(cVer)<=0){ printf("%s is not tag or not version\n",dirp->d_name); dlclose(handle); continue; } printf("Tag:%s, Ver:%s\n", cTag, cVer); m_soNames.insert(std::pair<std::string,void*>(std::string(cTag), handle)); m_soVers.insert(std::pair<std::string, std::string>(std::string(cTag),std::string(cVer))); } } closedir(dp); } void ExtendInterface::ExternalFunction(void* handle) { printf("ExtendInterface::%s\n", __FUNCTION__); //初始化接口 Extend_ReadCfgCallback fn1 = (Extend_ReadCfgCallback)dlsym(handle, "Extend_ReadCfgCallback"); if(fn1){ fn1(ReadCfg); } Extend_WriteCfgCallback fn2 = (Extend_WriteCfgCallback)dlsym(handle, "Extend_WriteCfgCallback"); if(fn2){ fn2(WriteCfg); } } void ExtendInterface::GetCurInfo(char* tag, char* ver) { memcpy(tag, m_curSoTag.data(), m_curSoTag.length()); memcpy(ver, m_curSoVer.data(), m_curSoVer.length()); } int ExtendInterface::TestInterface(char* test) { m_curSoTag.clear(); m_curSoVer.clear(); std::map<std::string, void*>::iterator it = m_soNames.begin(); for(;it != m_soNames.end(); ++it){ Extend_TestInterface fn=(Extend_TestInterface)dlsym(it->second, "Extend_TestInterface"); if(fn){ m_curSoTag = it->first; std::map<std::string, std::string>::iterator itVer = m_soVers.find(it->first); if(itVer != m_soVers.end()){ m_curSoVer = itVer->second; } int ret = fn(test); if(ret > 0) return ret; } } return 0; }