atomic {
if (m_sobuf || !buf || !len)
return FAIL;
- m_sobuf = buf;
- m_solen = len;
- while (!call Registers.getIfgTx());
+ m_sbuf = m_sobuf = buf;
+ m_slen = m_solen = len;
call Registers.setIeTx();
- call Registers.setTxbuf(*m_sobuf);
- m_slen = m_solen - 1;
- if (m_slen)
- m_sbuf = m_sobuf + 1;
return SUCCESS;
}
}
/* FIXME: this can cause an arbitrarily long ISR, if m_slen is large.
* But depending on timing, we may always only write 1 byte.
*/
+ while (!call Registers.getIfgTx()); /* in case interleaved UB.send */
while (m_slen && call Registers.getIfgTx()) {
call Registers.setTxbuf(*m_sbuf);
if (--m_slen)
m_sbuf++;
}
- if (m_slen == 0 && m_sobuf) {
+ if (m_slen == 0) {
call Registers.clrIeTx();
m_sobuf = 0;
signal UartStream.sendDone(m_sobuf, m_solen, SUCCESS);