bgfx + SDL starting point (proper threading)

hello_triangle.cpp

#include <stdio.h>

//#define SDL_MAIN_HANDLED
#include <SDL.h>
#include <SDL_syswm.h>
#include <bgfx/bgfx.h>
#include <bgfx/platform.h>


inline bool sdlSetWindow(SDL_Window* _window)
{
  SDL_SysWMinfo wmi;
  SDL_VERSION(&wmi.version);
  if (!SDL_GetWindowWMInfo(_window, &wmi) )
  {
    return false;
  }

  bgfx::PlatformData pd;
#	if BX_PLATFORM_LINUX || BX_PLATFORM_BSD
  pd.ndt          = wmi.info.x11.display;
  pd.nwh          = (void*)(uintptr_t)wmi.info.x11.window;
#	elif BX_PLATFORM_OSX
  pd.ndt          = NULL;
  pd.nwh          = wmi.info.cocoa.window;
#	elif BX_PLATFORM_WINDOWS
  pd.ndt          = NULL;
  pd.nwh          = wmi.info.win.window;
#	elif BX_PLATFORM_STEAMLINK
  pd.ndt          = wmi.info.vivante.display;
  pd.nwh          = wmi.info.vivante.window;
#	endif // BX_PLATFORM_
  pd.context      = NULL;
  pd.backBuffer   = NULL;
  pd.backBufferDS = NULL;
  bgfx::setPlatformData(pd);

  return true;
}

int32_t run() 
{
  init();
  bgfx::frame();
  setWindowSize();
  while(update()) {}
  shutdown();
}

int32_t threadFunc(bx::Thread* _thread, void* _userData)
{
  BX_UNUSED(_thread);
  BX_UNUSED(_userData);
  
  int32_t result = run();
  
  SDL_Event event;
  SDL_QuitEvent& qev = event.quit;
  qev.type = SDL_QUIT;
  SDL_PushEvent(&event);
  return result;
}

int main()
{
  SDL_Init(0 | SDL_INIT_GAMECONTROLLER | SDL_INIT_SOUND);
  
  SDL_Window* window = SDL_CreateWindow("bgfx", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 800, 600, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE);

  sdlSetWindow(window);
  bgfx::renderFrame();
  
  bx::Thread thread;
  thread.init(threadFunc, NULL);
  
  bool exit = false;
	SDL_Event event;
  
  while (!exit) 
  {
    bgfx::renderFrame();
    
    while (SDL_PollEvent(&event))
    {
      switch(event.type) 
      {
        case SDL_QUIT:
          exit = true;
          break;
        case SDL_KEYDOWN:
          {
            SDL_KeyboardEvent& keyEvent = event.key;
            printf("Key press scancode %d\n", keyEvent.keysym.scancode);
            if (keyEvent.keysym.scancode == SDL_SCANCODE_ESCAPE)
            {
              exit = true;
            }
          }
          break;
      }
    }
  }
  
  while (bgfx::RenderFrame::NoContext != bgfx::renderFrame() ) {};
  thread.shutdown();
  
  SDL_DestroyWindow(window);
  SDL_Quit();
  
  return thread.getExitCode();
}