glfwGetTime work fine in dll but return 0 in executable in my project, so I create a minimal reproduction project. https://github.com/CheapMeow/glfw-get-time-test
But in this project, I find glfwGetTime work fine in lib but return 0 in dll. It is confusing, why?
My minimal project intro:
glfw-in-dll folder contains project that uses glfwGetTime in dll.
glfw-in-dll\src\runtime\time_utils.h
#pragma once
#include "macro.h"
#include <GLFW/glfw3.h>
class LIBRARY_API Time
{
public:
static float GetTime() { return glfwGetTime(); }
};
glfw-in-lib folder contains project that uses glfwGetTime in lib.
glfw-in-lib\src\runtime\time_utils.h
#pragma once
#include <GLFW/glfw3.h>
class Time
{
public:
static float GetTime() { return glfwGetTime(); }
};
Both projects print glfwGetTime() in library.
void Runtime::PrintTime() { std::cout << "Runtime: " << Time::GetTime() << "s" << std::endl; }
Both projects print glfwGetTime() in executable.
int main()
{
if (glfwInit())
std::cout << "Editor: GLFW init success." << std::endl;
else
std::cout << "Editor: GLFW init fail." << std::endl;
Runtime runtime;
std::size_t output_count = 0;
std::size_t max_output_count = 100;
while (1)
{
randomSleep(50.0, 100.0);
std::cout << "Editor: " << Time::GetTime() << "s" << std::endl;
runtime.PrintTime();
output_count++;
if (output_count >= max_output_count)
break;
}
return 0;
}
glfw-in-dll output
Editor: Waited for 87.1732 ms.
Editor: 0.723095s
Runtime: 0s
Editor: Waited for 69.2278 ms.
Editor: 0.800194s
Runtime: 0s
Editor: Waited for 99.8627 ms.
Editor: 0.908878s
Runtime: 0s
Editor: Waited for 70.4661 ms.
Editor: 0.985678s
Runtime: 0s
Editor: Waited for 83.087 ms.
Editor: 1.07766s
Runtime: 0s
glfw-in-lib output
Editor: Waited for 74.9078 ms.
Editor: 0.833975s
Runtime: 0.834277s
Editor: Waited for 75.4188 ms.
Editor: 0.910967s
Runtime: 0.911241s
Editor: Waited for 75.6444 ms.
Editor: 0.990564s
Runtime: 0.990761s
Editor: Waited for 82.5768 ms.
Editor: 1.08412s
Runtime: 1.08442s
Editor: Waited for 80.6122 ms.
Editor: 1.17785s
Runtime: 1.17831s