add the readspeed example

the readspeed example needs to be statically compiled since we use internal functions that are not exposed in the dll/so

CMakeLists.txt

@@ -398,6 +398,9 @@ if(BUILD_EXAMPLES)
     add_executable(server_variable ${PROJECT_SOURCE_DIR}/examples/server_variable.c $<TARGET_OBJECTS:open62541-object>)
 	target_link_libraries(server_variable ${LIBS})
 
+	add_executable(server_readspeed ${PROJECT_SOURCE_DIR}/examples/server_readspeed.c $<TARGET_OBJECTS:open62541-object>)
+	target_link_libraries(server_readspeed ${LIBS})
+
 	add_executable(server_datasource ${PROJECT_SOURCE_DIR}/examples/server_datasource.c $<TARGET_OBJECTS:open62541-object>)
 	target_link_libraries(server_datasource ${LIBS})
 

examples/CMakeLists.txt

@@ -14,6 +14,9 @@ if(ENABLE_MULTITHREADING)
     list(APPEND LIBS urcu-cds urcu urcu-common)
 endif(ENABLE_MULTITHREADING)
 
+add_executable(server_readspeed server_readspeed.c)
+target_link_libraries(server_readspeed ${LIBS})
+
 add_executable(server_variable server_variable.c)
 target_link_libraries(server_variable ${LIBS})
 

examples/server_readspeed.c

@@ -0,0 +1,103 @@
+/*
+ * This work is licensed under a Creative Commons CCZero 1.0 Universal License.
+ * See http://creativecommons.org/publicdomain/zero/1.0/ for more information.
+ */
+
+#include <signal.h>
+
+#ifdef UA_NO_AMALGAMATION
+# include "ua_types.h"
+# include "ua_server.h"
+# include "logger_stdout.h"
+# include "networklayer_tcp.h"
+#else
+# include "open62541.h"
+#endif
+
+#include <time.h>
+#include "ua_types_generated.h"
+#include "server/ua_services.h"
+#include "ua_types_encoding_binary.h"
+
+UA_Boolean running = 1;
+UA_Logger logger;
+
+static void stopHandler(int sign) {
+    UA_LOG_INFO(logger, UA_LOGCATEGORY_SERVER, "received ctrl-c");
+    running = 0;
+}
+
+int main(int argc, char** argv) {
+    signal(SIGINT, stopHandler); /* catches ctrl-c */
+
+    UA_Server *server = UA_Server_new(UA_ServerConfig_standard);
+    logger = Logger_Stdout_new();
+    UA_Server_setLogger(server, logger);
+    UA_Server_addNetworkLayer(server, ServerNetworkLayerTCP_new(UA_ConnectionConfig_standard, 16664));
+
+    /* add a variable node to the address space */
+    UA_Variant *myIntegerVariant = UA_Variant_new();
+    UA_Int32 myInteger = 42;
+    UA_Variant_setScalarCopy(myIntegerVariant, &myInteger, &UA_TYPES[UA_TYPES_INT32]);
+    //NOTE: the link between myInteger and the value of the node is lost here, you can safely reuse myInteger
+    UA_QualifiedName myIntegerName = UA_QUALIFIEDNAME(1, "the answer");
+    UA_NodeId myIntegerNodeId = UA_NODEID_STRING(1, "the.answer"); /* UA_NODEID_NULL would assign a random free nodeid */
+    UA_LocalizedText myIntegerBrowseName = UA_LOCALIZEDTEXT("en_US","the answer");
+    UA_NodeId parentNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER);
+    UA_NodeId parentReferenceNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES);
+
+    UA_Server_addVariableNode(server, myIntegerNodeId, myIntegerName, myIntegerBrowseName, myIntegerBrowseName, 0, 0,
+                              parentNodeId, parentReferenceNodeId, myIntegerVariant, NULL);
+
+    UA_ReadRequest request;
+    UA_ReadRequest_init(&request);
+    UA_ReadValueId rvi;
+    rvi.nodeId = myIntegerNodeId;
+    rvi.attributeId = UA_ATTRIBUTEID_VALUE;
+    rvi.indexRange = UA_STRING_NULL;
+    rvi.dataEncoding = UA_QUALIFIEDNAME(0, "DefaultBinary");
+    request.timestampsToReturn = UA_TIMESTAMPSTORETURN_NEITHER;
+    request.nodesToReadSize = 1;
+    request.nodesToRead = &rvi;
+
+    UA_ByteString request_msg;
+    UA_ByteString response_msg;
+    UA_ByteString_newMembers(&request_msg, 1000);
+    UA_ByteString_newMembers(&response_msg, 1000);
+    size_t offset = 0;
+    UA_encodeBinary(&request, &UA_TYPES[UA_TYPES_READREQUEST], &request_msg, &offset);
+    
+    clock_t begin, end;
+    begin = clock();
+
+    UA_ReadRequest rq;
+    UA_ReadResponse rr;
+
+    for(int i = 0; i < 600000; i++) {
+        UA_ReadRequest_init(&rq);
+        UA_ReadResponse_init(&rr);
+
+        offset = 0;
+        UA_decodeBinary(&request_msg, &offset, &rq, &UA_TYPES[UA_TYPES_READREQUEST]);
+
+        Service_Read(server, &adminSession, &rq, &rr);
+
+        offset = 0;
+        UA_encodeBinary(&rr, &UA_TYPES[UA_TYPES_READRESPONSE], &response_msg, &offset);
+
+        UA_ReadRequest_deleteMembers(&rq);
+        UA_ReadResponse_deleteMembers(&rr);
+    }
+
+    end = clock();
+    double time_spent = (double)(end - begin) / CLOCKS_PER_SEC;
+    printf("duration was %f s\n", time_spent);
+
+    UA_ByteString_deleteMembers(&request_msg);
+    UA_ByteString_deleteMembers(&response_msg);
+
+    UA_StatusCode retval = UA_Server_run(server, 1, &running);
+    UA_Server_delete(server);
+
+    return retval;
+}