How to render from multithreaded context - c++

Question

In my following code.
class RenderOpengl
{
private:
GLFWwindow* window = NULL;
public:
RenderOpengl() { InitGLFW(); }
void InitGLFW()
{
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
window = glfwCreateWindow(1920, 1080, "Test", NULL, NULL);
if (window == NULL)
{
std::cout << "Failed to create GLFW window" << std::endl;
glfwTerminate();
// return -1;
}
else
std::cout << "Window Created";
glfwMakeContextCurrent(window);
glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
GLenum GlewInitResult;
glewExperimental = GL_TRUE;
GlewInitResult = glewInit();
if (GLEW_OK != GlewInitResult) // Check if glew is initialized properly
{
std::cout << "Not able to initialize glew";
// return -1;
}
}
void Render()
{
while (!glfwWindowShouldClose(window)) {
std::cout << "I am function number 555" << std::endl;
glfwMakeContextCurrent(window);
std::cout << glGetError() << std::endl;
glfwSwapBuffers(window);
glfwPollEvents();
}
}
};
class ThreadClass
{
public:
explicit ThreadClass(RenderOpengl* _gl) { gl = _gl; };
RenderOpengl* gl;
void RenderGL()
{
gl->Render();
}
};
int main()
{
RenderOpengl renderGL;
std::thread t(&ThreadClass::RenderGL, ThreadClass(&renderGL));
t.join();
// renderGL.Render();
std::cout << "Hello World!\n";
}
The rendering call in the Main function does not give any error.(renderGL.Render())
But if I comment this line and call the same function in a separate thread it gives error 1282 , despite calling the glfwMakeContextCurrent(window).