Added locks around API calls, which doesn't solve the problem of the IOC crashing on SIGPWR signal

LinkamApp/src/Linkam_T96.cpp

@@ -73,7 +73,9 @@ asynStatus Linkam::connect(asynUser *pasynUser)
 	 */
 	// OpenComms only works for Windows-style numbering of COM ports
 	//commStatus_ = OpenComms(true, 1, 0);
+	this->lock();
 	commStatus_ = OpenCommsFromDevice(true, serialPort_);
+	this->unlock();
 	
     /* We found the controller and everything is OK.  Signal to asynManager that we are connected. */
     status = pasynManager->exceptionConnect(this->pasynUserSelf);
@@ -97,7 +99,9 @@ asynStatus Linkam::disconnect(asynUser *pasynUser)
 
 	// OpenComms only works for Windows-style numbering of COM ports
 	//commStatus_ = OpenComms(false, 1, 0);
+	this->lock();
 	commStatus_ = OpenCommsFromDevice(false, serialPort_);
+	this->unlock();
 	
     /* We found the controller and everything is OK.  Signal to asynManager that we are connected. */
     status = pasynManager->exceptionDisconnect(this->pasynUserSelf);
@@ -158,7 +162,9 @@ asynStatus Linkam::readTemperature(epicsFloat64 *value)
 {
 	static const char *functionName = "readTemperature";
 	
+	this->lock();
 	*value = GetValue(u32Heater1TempR);
+	this->unlock();
 	// There probably isn't a good reason to retain the temperature in a private variable;
 	// The value is already stored in the parameter library
 	temperatureRbv_ = *value;
@@ -174,7 +180,9 @@ asynStatus Linkam::readRampLimit(epicsFloat64 *value)
 {
 	static const char *functionName = "readRampLimit";
 	
+	this->lock();
 	*value = GetValue(u32Heater1LimitRW);
+	this->unlock();
 	
     asynPrint(this->pasynUserSelf, ASYN_TRACEIO_DRIVER, 
 			"%s:%s, port %s, value = %lf\n",
@@ -187,7 +195,9 @@ asynStatus Linkam::readRampRate(epicsFloat64 *value)
 {
 	static const char *functionName = "readRampRate";
 	
+	this->lock();
 	*value = GetValue(u32Heater1RateRW);
+	this->unlock();
 	
     asynPrint(this->pasynUserSelf, ASYN_TRACEIO_DRIVER, 
 			"%s:%s, port %s, value = %lf\n",
@@ -200,7 +210,9 @@ asynStatus Linkam::readHeaterPower(epicsFloat64 *value)
 {
 	static const char *functionName = "readHeaterPower";
 	
+	this->lock();
 	*value = GetValue(u32Heater1PowerR);
+	this->unlock();
 	
     asynPrint(this->pasynUserSelf, ASYN_TRACEIO_DRIVER, 
 			"%s:%s, port %s, value = %lf\n",
@@ -263,8 +275,10 @@ asynStatus Linkam::setRampLimit(epicsFloat64 value)
 	 * 
 	 * 	Returns true if set successfully, false otherwise.
 	 */ 
+	this->lock();
 	//status = SetValue(u32Heater1LimitRW, (float) value);
 	status = SetValue(2, (float) value);
+	this->unlock();
 	
     asynPrint(this->pasynUserSelf, ASYN_TRACEIO_DRIVER, 
 			"%s:%s, port %s, value = %lf\n",
@@ -278,8 +292,10 @@ asynStatus Linkam::setRampRate(epicsFloat64 value)
 	bool status;
 	static const char *functionName = "setRampRate";
 	
+	this->lock();
 	//status = SetValue(u32Heater1RateRW, (float) value);
 	status = SetValue(1, (float) value);
+	this->unlock();
 	
     asynPrint(this->pasynUserSelf, ASYN_TRACEIO_DRIVER, 
 			"%s:%s, port %s, value = %lf\n",
@@ -328,7 +344,9 @@ asynStatus Linkam::setHeating(epicsInt32 value)
 	bool status;
 	static const char *functionName = "setHeating";
 	
+	this->lock();
 	status = StartHeating((value==1) ? true : false);
+	this->unlock();
 	
     asynPrint(this->pasynUserSelf, ASYN_TRACEIO_DRIVER, 
 			"%s:%s, port %s, value = %d\n",