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Give other threads a chance to lock the mutex in MQTTRun #188

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Give other threads a chance to lock the mutex in MQTTRun #188

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501e363
Update MQTTClient.c
xw0323 Aug 15, 2019
4d70cc7
Don't receive data when disconnection
xw0323 Aug 21, 2019
5881e4e
Change timeout value of sendPacket in cycle
xw0323 Oct 10, 2019
6d94f6b
Receive timeout in keepalive
xw0323 Nov 1, 2019
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17 changes: 14 additions & 3 deletions MQTTClient-C/src/MQTTClient.c
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Original file line number Diff line number Diff line change
Expand Up @@ -227,7 +227,10 @@ int keepalive(MQTTClient* c)
TimerCountdownMS(&timer, 1000);
int len = MQTTSerialize_pingreq(c->buf, c->buf_size);
if (len > 0 && (rc = sendPacket(c, len, &timer)) == SUCCESS) // send the ping packet
{
c->ping_outstanding = 1;
TimerCountdown(&c->last_received, c->keepAliveInterval); // reset receive timer
}
}
}

Expand Down Expand Up @@ -293,8 +296,10 @@ int cycle(MQTTClient* c, Timer* timer)
len = MQTTSerialize_ack(c->buf, c->buf_size, PUBREC, 0, msg.id);
if (len <= 0)
rc = FAILURE;
else
else {
TimerCountdownMS(timer, c->command_timeout_ms);
rc = sendPacket(c, len, timer);
}
if (rc == FAILURE)
goto exit; // there was a problem
}
Expand All @@ -310,8 +315,11 @@ int cycle(MQTTClient* c, Timer* timer)
else if ((len = MQTTSerialize_ack(c->buf, c->buf_size,
(packet_type == PUBREC) ? PUBREL : PUBCOMP, 0, mypacketid)) <= 0)
rc = FAILURE;
else if ((rc = sendPacket(c, len, timer)) != SUCCESS) // send the PUBREL packet
rc = FAILURE; // there was a problem
else {
TimerCountdownMS(timer, c->command_timeout_ms);
if ((rc = sendPacket(c, len, timer)) != SUCCESS) // send the PUBREL packet
rc = FAILURE; // there was a problem
}
if (rc == FAILURE)
goto exit; // there was a problem
break;
Expand Down Expand Up @@ -372,13 +380,16 @@ void MQTTRun(void* parm)

while (1)
{
if (!c->isconnected)
continue;
#if defined(MQTT_TASK)
MutexLock(&c->mutex);
#endif
TimerCountdownMS(&timer, 500); /* Don't wait too long if no traffic is incoming */
cycle(c, &timer);
#if defined(MQTT_TASK)
MutexUnlock(&c->mutex);
for (TimerCountdownMS(&timer, 1); !TimerIsExpired(&timer);); /* Give other threads a chance to lock the mutex */
#endif
}
}
Expand Down