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Only write to socket pair in threaded mode #3062

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Only write to socket pair in threaded mode #3062

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2 changes: 1 addition & 1 deletion lib/packet_mosq.c
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Original file line number Diff line number Diff line change
Expand Up @@ -191,7 +191,7 @@ int packet__queue(struct mosquitto *mosq, struct mosquitto__packet *packet)

/* Write a single byte to sockpairW (connected to sockpairR) to break out
* of select() if in threaded mode. */
if(mosq->sockpairW != INVALID_SOCKET){
if(mosq->threaded == mosq_ts_self && mosq->sockpairW != INVALID_SOCKET){
#ifndef WIN32
if(write(mosq->sockpairW, &sockpair_data, 1)){
}
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