首次提交

.gitignore

@@ -0,0 +1 @@
+/.idea

CMakeLists.txt

@@ -0,0 +1,31 @@
+cmake_minimum_required(VERSION 3.20)
+project(lv_cpp_demo LANGUAGES CXX)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+if(NOT WIN32)
+    message(FATAL_ERROR "This sample builds a Windows DLL for LabVIEW.")
+endif()
+if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+    message(WARNING "This is a 64-bit build. 32-bit LabVIEW needs a Win32 build.")
+endif()
+set(dir ${CMAKE_SOURCE_DIR}/src)
+file(GLOB_RECURSE srcs "${dir}/*.cpp" "${dir}/*.c" "${dir}/*.h")
+add_library(lv_cpp_demo SHARED ${srcs})
+target_compile_definitions(lv_cpp_demo PRIVATE LV_CPP_DEMO_BUILD)
+set_target_properties(lv_cpp_demo PROPERTIES OUTPUT_NAME lv_cpp_demo)
+if(MSVC)
+    target_compile_options(lv_cpp_demo PUBLIC /utf-8)
+    set(dumpbin "C:/Program Files (x86)/Microsoft Visual Studio/2019/Enterprise/VC/Tools/MSVC/14.29.30133/bin/Hostx64/x64/dumpbin.exe")
+    add_custom_target(dump_exports
+            COMMAND "${dumpbin}" /exports "$<TARGET_FILE:lv_cpp_demo>"
+            DEPENDS lv_cpp_demo
+            USES_TERMINAL
+    )
+    add_dependencies(dump_exports lv_cpp_demo)
+endif()
+
+
+
+add_executable(lv_cpp_demo_test test/main.cpp)
+target_link_libraries(lv_cpp_demo_test PRIVATE lv_cpp_demo)
+

README.md

@@ -0,0 +1,5 @@
+实现 labview 调用c dll
+
+使用msvc2019的时候  选择 好配置
+![img.png](img/img.png)
+

doc/安装labview.md

@@ -0,0 +1 @@
+[安装labview](https://zhuanlan.zhihu.com/p/1932866996887876485)

labview/调用dll.aliases

@@ -0,0 +1,2 @@
+[我的电脑]
+我的电脑 = "10.10.10.149"

labview/调用dll.lvlps

@@ -0,0 +1,2 @@
+[项目窗口数据(_D)]
+ProjectExplorer.ClassicPosition[String] = "261,767,882,1591"

labview/调用dll.lvproj

@@ -0,0 +1,19 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<Project Type="Project" LVVersion="25008000">
+	<Property Name="NI.LV.All.SaveVersion" Type="Str">25.0</Property>
+	<Property Name="NI.LV.All.SourceOnly" Type="Bool">true</Property>
+	<Item Name="我的电脑" Type="My Computer">
+		<Property Name="server.app.propertiesEnabled" Type="Bool">true</Property>
+		<Property Name="server.control.propertiesEnabled" Type="Bool">true</Property>
+		<Property Name="server.tcp.enabled" Type="Bool">false</Property>
+		<Property Name="server.tcp.port" Type="Int">0</Property>
+		<Property Name="server.tcp.serviceName" Type="Str">我的电脑/VI服务器</Property>
+		<Property Name="server.tcp.serviceName.default" Type="Str">我的电脑/VI服务器</Property>
+		<Property Name="server.vi.callsEnabled" Type="Bool">true</Property>
+		<Property Name="server.vi.propertiesEnabled" Type="Bool">true</Property>
+		<Property Name="specify.custom.address" Type="Bool">false</Property>
+		<Item Name="add.vi" Type="VI" URL="../add.vi"/>
+		<Item Name="依赖关系" Type="Dependencies"/>
+		<Item Name="程序生成规范" Type="Build"/>
+	</Item>
+</Project>

src/lv_api.h

@@ -0,0 +1,15 @@
+#pragma once
+#include <stdint.h>
+#ifdef _WIN32
+#define LV_CALL __cdecl
+#ifdef LV_CPP_DEMO_BUILD
+#define LV_API __declspec(dllexport)
+#else
+#define LV_API __declspec(dllimport)
+#endif
+#else
+#define LV_CALL
+#define LV_API
+#endif
+typedef int32_t MgErr;
+typedef void *InstanceDataPtr;

src/lv_cpp_demo.cpp

@@ -0,0 +1,4 @@
+#include "lv_cpp_demo.h"
+extern "C" LV_API int32_t LV_CALL lv_add_i32(int32_t a,int32_t b) {
+    return a + b;
+}

src/lv_cpp_demo.h

@@ -0,0 +1,9 @@
+#pragma once
+#include "lv_api.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+LV_API int32_t LV_CALL lv_add_i32(int32_t a,int32_t b);
+#ifdef __cplusplus
+}
+#endif

src/lv_lifecycle.cpp

@@ -0,0 +1,32 @@
+#include "lv_lifecycle.h"
+#include <new>
+struct LvLifecycleState {
+    int32_t active;
+};
+extern "C" LV_API void LV_CALL lv_lifecycle_anchor(void) {
+}
+extern "C" LV_API MgErr LV_CALL lv_lifecycle_reserve(InstanceDataPtr *instanceState) {
+    if (!instanceState) {
+        return -1;
+    }
+    if (*instanceState) {
+        return 0;
+    }
+    LvLifecycleState *state = new(std::nothrow) LvLifecycleState();
+    if (!state) {
+        return -2;
+    }
+    state->active = 1;
+    *instanceState = state;
+    return 0;
+}
+extern "C" LV_API MgErr LV_CALL lv_lifecycle_unreserve(InstanceDataPtr *instanceState) {
+    if (instanceState && *instanceState) {
+        delete static_cast<LvLifecycleState*>(*instanceState);
+        *instanceState = nullptr;
+    }
+    return 0;
+}
+extern "C" LV_API MgErr LV_CALL lv_lifecycle_abort(InstanceDataPtr *instanceState) {
+    return lv_lifecycle_unreserve(instanceState);
+}

src/lv_lifecycle.h

@@ -0,0 +1,16 @@
+#pragma once
+#include "lv_api.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+/* LabVIEW 生命周期锚点函数。函数本身不做业务逻辑，只用于挂载生命周期回调。 */
+LV_API void LV_CALL lv_lifecycle_anchor(void);
+/* LabVIEW 在调用库函数节点被保留执行时调用。适合做 DLL 级初始化。 */
+LV_API MgErr LV_CALL lv_lifecycle_reserve(InstanceDataPtr *instanceState);
+/* LabVIEW 在调用库函数节点解除保留时调用。适合释放保留阶段初始化的资源。 */
+LV_API MgErr LV_CALL lv_lifecycle_unreserve(InstanceDataPtr *instanceState);
+/* LabVIEW 在 VI 被强制中止时调用。只适合做紧急清理或通知后台任务退出。 */
+LV_API MgErr LV_CALL lv_lifecycle_abort(InstanceDataPtr *instanceState);
+#ifdef __cplusplus
+}
+#endif

test/main.cpp

@@ -0,0 +1,22 @@
+#include "../src/lv_cpp_demo.h"
+#include <iostream>
+int main() {
+    double in_data[3] = {1.0,2.0,3.0};
+    double out_data[3] = {0.0,0.0,0.0};
+    double sum = 0.0;
+    char text[128];
+    std::cout << "add=" << lv_add_i32(10,20) << std::endl;
+    std::cout << "mul=" << lv_mul_f64(2.5,4.0) << std::endl;
+    lv_sum_f64(in_data,3,&sum);
+    std::cout << "sum=" << sum << std::endl;
+    lv_scale_f64(in_data,3,10.0,out_data);
+    std::cout << "scale=" << out_data[0] << "," << out_data[1] << "," << out_data[2] << std::endl;
+    lv_make_message(123,text,sizeof(text));
+    std::cout << "message=" << text << std::endl;
+    void *engine = lv_engine_create();
+    lv_engine_configure(engine,2.0,5.0);
+    lv_engine_process(engine,in_data,3,out_data);
+    std::cout << "engine=" << out_data[0] << "," << out_data[1] << "," << out_data[2] << std::endl;
+    lv_engine_destroy(engine);
+    return 0;
+}