added InfoLoggerErrorCodes.h to reserve specific ranges for each o2 module

Author: sy-c

src/InfoLoggerErrorCodes.h

@@ -0,0 +1,64 @@
+// Copyright CERN and copyright holders of ALICE O2. This software is
+// distributed under the terms of the GNU General Public License v3 (GPL
+// Version 3), copied verbatim in the file "COPYING".
+//
+// See http://alice-o2.web.cern.ch/license for full licensing information.
+//
+// In applying this license CERN does not waive the privileges and immunities
+// granted to it by virtue of its status as an Intergovernmental Organization
+// or submit itself to any jurisdiction.
+
+
+// This file is used to define the error codes used in InfoLogger
+// Some ranges are reserved for each external module making use of error codes.
+// Error codes are referenced and documented centrally here.
+
+
+namespace AliceO2
+{
+namespace InfoLogger
+{
+
+
+// Structure to describe the ranges of error codes
+typedef struct {
+  const int errorCodeMin; // minimum error code
+  const int errorCodeMax; // maximum error code max
+  const char *component; // component associated to this error code range
+  const char *url; // link to corresponding troubleshooting documentation
+} ErrorCodeRange;
+
+// Static array defining reserved error code ranges to be used by the o2 modules.
+// Error code definitions within each range is left to the corresponding package.
+// Terminated by a null entry
+static constexpr ErrorCodeRange errorCodeRanges[]={
+  { 0, 999, "reserved for general purpose", "" },
+  { 1000, 1999, "infoLogger", "" },
+  { 2000, 2999, "aliECS", "" },
+  { 0, 0, nullptr, nullptr}  
+};
+
+// Constant giving the number of error code ranges defined in errorCodeRanges[]
+static int numberOfErrorCodeRanges = sizeof(errorCodeRanges)/sizeof(ErrorCodeRange)-1;
+
+// Structure to describe each error code
+typedef struct {
+  const int errorCode; // minimum error code
+  const char *description; // short description of the error / hint
+  const char *url; // link to corresponding troubleshooting documentation
+} ErrorCode;
+
+// Static array defining available error codes
+// Terminated by a null entry
+static constexpr ErrorCode errorCodes[]={
+  { 0, nullptr, nullptr}
+};
+
+// Constant giving the number of error codes defined in errorCodes[]
+static int numberOfErrorCodes = sizeof(errorCodes)/sizeof(ErrorCode)-1;
+
+
+// end namespace InfoLogger
+}
+// end namespace AliceO2
+}