在typescript浏览器端中调用C++编写的函数，WebAssembly传递指针类型的参数，以及处理指针类型的返回值。

Xeon_CC

于 2024-09-17 00:14:16 发布

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文章标签： typescript c++ wasm

本文链接：https://blog.youkuaiyun.com/Xeon_CC/article/details/142308685

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首先要在Cmake工程中的cmakelists.txt文件中引入Emscripten工具链：

set(CMAKE_TOOLCHAIN_FILE "D:/CppPkg/emsdk/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake")

直接看C++代码：

#include <emscripten/emscripten.h>
#include <cstdlib>


extern "C" {
   
	struct DataResult {
   
		double* dArr;
		int propCount;
	};

	EMSCRIPTEN_KEEPALIVE
	double sumArray(double* fArr, int arrLen) {
   
		double sum = 0.0;
		for (int i = 0; i < arrLen; i++) {
   
			sum += fArr[i];
		}
		return sum;
	}
	EMSCRIPTEN_KEEPALIVE
	double* vectorSum(double* vectorA, double* vectorB, int vecLen) {
   
		double* resArr = (double*)malloc(vecLen * sizeof(double));
		for (int i = 0; i < vecLen; i++) {
   
			resArr[i] = vectorA[i] + vectorB[i];
		}
		return resArr;
	}
	EMSCRIPTEN_KEEPALIVE
	DataResult* createDataResult(double* dArr, int propCount) {
   
		DataResult* dtRes = (DataResult*)malloc(sizeof(DataResult));
		dtRes->dArr = dArr;
		dtRes->propCount = propCount;
		return dtRes;
	}

	EMSCRIPTEN_KEEPALIVE
	double* allocateDoubleMemory<