diff options
| author | Pau Espin Pedrol <pespin@sysmocom.de> | 2019-09-13 18:56:08 +0200 |
|---|---|---|
| committer | Pau Espin Pedrol <pespin@sysmocom.de> | 2019-09-20 19:17:22 +0200 |
| commit | e503c988d825e0eaf5f56ed8dd68b318b3e43c04 (patch) | |
| tree | 85527c3ea1f78c35eaf02df1c0584f16a88d9511 /Transceiver52M/radioInterfaceResamp.cpp | |
| parent | ee2ba19cec96347d11e3661077ef3c4c0eb068c2 (diff) | |
radioInterface: Atomically fetch and change underrun variable
Otherwise, it could happen that underrun events are lost:
TxLower (isUnderrun): RxLower (pullBuffer):
read(underrun)
read(underrun)
write(underrun, |val) [maybe underrun becomes TRUE]
write(underrun, false)
Similary, it could happen the other direction if atomic was only applied
to isUnderrun:
TxLower (isUnderrun): RxLower (pullBuffer):
read(underrun) -> true
read(underrun)-> true
write(underrun, false)
write(underrun, true|val) where val=false
So in here isUnderrun would return true twice while it should only
return one.
Change-Id: I684e0a5d2a9583a161d5a6593559b3a9e7cd57e3
Diffstat (limited to 'Transceiver52M/radioInterfaceResamp.cpp')
| -rw-r--r-- | Transceiver52M/radioInterfaceResamp.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Transceiver52M/radioInterfaceResamp.cpp b/Transceiver52M/radioInterfaceResamp.cpp index 864cdee..b92432f 100644 --- a/Transceiver52M/radioInterfaceResamp.cpp +++ b/Transceiver52M/radioInterfaceResamp.cpp @@ -184,7 +184,7 @@ int RadioInterfaceResamp::pullBuffer() convert_short_float((float *) outerRecvBuffer->begin(), convertRecvBuffer[0], 2 * resamp_outchunk); - underrun |= local_underrun; + osmo_trx_sync_or_and_fetch(&underrun, local_underrun); readTimestamp += (TIMESTAMP) resamp_outchunk; /* Write to the end of the inner receive buffer */ @@ -232,7 +232,7 @@ bool RadioInterfaceResamp::pushBuffer() LOG(ALERT) << "Transmit error " << numSent; } - underrun |= local_underrun; + osmo_trx_sync_or_and_fetch(&underrun, local_underrun); writeTimestamp += resamp_outchunk; return true; |