bool S3fsCurl::InitShareCurl()

in src/curl.cpp [232:279]
47 lines of code
20 McCabe index (conditional complexity)

bool S3fsCurl::InitShareCurl()
{
    CURLSHcode nSHCode;

    if(!S3fsCurl::is_dns_cache && !S3fsCurl::is_ssl_session_cache){
        S3FS_PRN_INFO("Curl does not share DNS data.");
        return true;
    }
    if(S3fsCurl::hCurlShare){
        S3FS_PRN_WARN("already initiated.");
        return false;
    }
    if(NULL == (S3fsCurl::hCurlShare = curl_share_init())){
        S3FS_PRN_ERR("curl_share_init failed");
        return false;
    }
    if(CURLSHE_OK != (nSHCode = curl_share_setopt(S3fsCurl::hCurlShare, CURLSHOPT_LOCKFUNC, S3fsCurl::LockCurlShare))){
        S3FS_PRN_ERR("curl_share_setopt(LOCKFUNC) returns %d(%s)", nSHCode, curl_share_strerror(nSHCode));
        return false;
    }
    if(CURLSHE_OK != (nSHCode = curl_share_setopt(S3fsCurl::hCurlShare, CURLSHOPT_UNLOCKFUNC, S3fsCurl::UnlockCurlShare))){
        S3FS_PRN_ERR("curl_share_setopt(UNLOCKFUNC) returns %d(%s)", nSHCode, curl_share_strerror(nSHCode));
        return false;
    }
    if(S3fsCurl::is_dns_cache){
        nSHCode = curl_share_setopt(S3fsCurl::hCurlShare, CURLSHOPT_SHARE, CURL_LOCK_DATA_DNS);
        if(CURLSHE_OK != nSHCode && CURLSHE_BAD_OPTION != nSHCode && CURLSHE_NOT_BUILT_IN != nSHCode){
            S3FS_PRN_ERR("curl_share_setopt(DNS) returns %d(%s)", nSHCode, curl_share_strerror(nSHCode));
            return false;
        }else if(CURLSHE_BAD_OPTION == nSHCode || CURLSHE_NOT_BUILT_IN == nSHCode){
            S3FS_PRN_WARN("curl_share_setopt(DNS) returns %d(%s), but continue without shared dns data.", nSHCode, curl_share_strerror(nSHCode));
        }
    }
    if(S3fsCurl::is_ssl_session_cache){
        nSHCode = curl_share_setopt(S3fsCurl::hCurlShare, CURLSHOPT_SHARE, CURL_LOCK_DATA_SSL_SESSION);
        if(CURLSHE_OK != nSHCode && CURLSHE_BAD_OPTION != nSHCode && CURLSHE_NOT_BUILT_IN != nSHCode){
            S3FS_PRN_ERR("curl_share_setopt(SSL SESSION) returns %d(%s)", nSHCode, curl_share_strerror(nSHCode));
            return false;
        }else if(CURLSHE_BAD_OPTION == nSHCode || CURLSHE_NOT_BUILT_IN == nSHCode){
            S3FS_PRN_WARN("curl_share_setopt(SSL SESSION) returns %d(%s), but continue without shared ssl session data.", nSHCode, curl_share_strerror(nSHCode));
        }
    }
    if(CURLSHE_OK != (nSHCode = curl_share_setopt(S3fsCurl::hCurlShare, CURLSHOPT_USERDATA, &S3fsCurl::callback_locks))){
        S3FS_PRN_ERR("curl_share_setopt(USERDATA) returns %d(%s)", nSHCode, curl_share_strerror(nSHCode));
        return false;
    }
    return true;
}