49 #define SOCK_OP_AND_LOG(buf, length, opable, rtv, exe)  \  argument
55         rtv = (exe); \
56         if (-1 == rtv) { \
65     ssize_t rtv = -1;  in send()  local
66     SOCK_OP_AND_LOG(buf, len, isValid(), rtv, sendto(buf, len, flags, destAddr, addrlen));  in send()
67     return rtv;  in send()
71     ssize_t rtv = -1;  in recv()  local
75     SOCK_OP_AND_LOG(dataCb.get(), mMaxTxSize, isValid(), rtv,  in recv()
77     return rtv;  in recv()
81     ssize_t rtv = -1;  in sendto()  local
83         rtv = ::sendto(mSid, buf, len, flags, destAddr, addrlen);  in sendto()
86         rtv = ::sendto(mSid, head.c_str(), head.length(), flags, destAddr, addrlen);  in sendto()
87         if (rtv > 0) {  in sendto()
88             for (size_t offset = 0; offset < len && rtv > 0; offset += rtv) {  in sendto()
89                 rtv = ::sendto(mSid, (char*)buf + offset, min(len - offset, (size_t)mMaxTxSize),  in sendto()
92             rtv = (rtv > 0) ? (head.length() + len) : -1;  in sendto()
95     return rtv;  in sendto()