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hotloading!!

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Asuro
2025-02-07 03:03:23 +01:00
parent 3be734ae2f
commit 60640a708f
7 changed files with 172 additions and 72 deletions
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196
src/engine/main.cpp
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@@ -2,15 +2,44 @@
#include <Windows.h>
#undef min
#undef max
#include <cstdio>
#include <libloaderapi.h>
#include <bx/string.h>
#include <bgfx/bgfx.h>
//#define VISUAL_STUDIO
typedef void (*Startup)(void*);
typedef void (*Update)();
constexpr UINT WM_CUSTOM_DLL_CHANGE = WM_USER + 1;
#ifdef VISUAL_STUDIO
const char* DLLPath = "Debug/PuzGame.dll";
#else
const char* DLLPath = "libPuzGame.dll";
#endif
struct FileWatcherData
{
bool Change = false;
};
struct DevelopmentData
{
uint8_t FileChangeBuffer[1024]{0};
HMODULE GameLib = NULL;
HANDLE hDevDir = NULL;
FileWatcherData FileWatcher;
};
namespace
{
DevelopmentData DevData;
Startup StartupFunc;
Update UpdateFunc;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
LRESULT Res = 0;
@@ -50,66 +79,139 @@ HWND InitWindow()
DWORD err = GetLastError();
printf("Failed to create window: %#x!\n", err);
}
DevData.hDevDir = CreateFileW(L"cmake-build", FILE_LIST_DIRECTORY, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (DevData.hDevDir == NULL)
{
printf("Failed to monitor dev dir!\n");
}
return window;
}
unsigned long FileWatcherThread(void* data)
{
DWORD bytesReturned = 0;
bool isRunning = DevData.hDevDir;
while (isRunning)
{
bx::memSet(DevData.FileChangeBuffer, 0, sizeof(DevData.FileChangeBuffer));
if (ReadDirectoryChangesW(DevData.hDevDir, DevData.FileChangeBuffer, sizeof(DevData.FileChangeBuffer), true, FILE_NOTIFY_CHANGE_FILE_NAME | FILE_NOTIFY_CHANGE_LAST_WRITE | FILE_NOTIFY_CHANGE_SIZE, &bytesReturned, NULL, NULL))
{
uint32_t offset = 0;
while (true)
{
FILE_NOTIFY_INFORMATION* notifyData = reinterpret_cast<FILE_NOTIFY_INFORMATION*>(&DevData.FileChangeBuffer[offset]);
wprintf(L"Change: %ls\n", notifyData->FileName);
if (notifyData->Action == FILE_ACTION_ADDED || notifyData->Action == FILE_ACTION_MODIFIED || notifyData->Action == FILE_ACTION_RENAMED_NEW_NAME)
{
if (wcscmp(notifyData->FileName, L"libPuzGame2.dll") == 0)
{
DevData.FileWatcher.Change = true;
printf("detected dll change!\n");
}
}
if (notifyData->NextEntryOffset == 0) break;
offset += notifyData->NextEntryOffset;
}
}
}
printf("File watcher thread ended!\n");
return 0;
}
bool ReloadDLL()
{
if (DevData.GameLib != NULL)
{
FreeLibrary(DevData.GameLib);
}
if (!CopyFile("cmake-build\\libPuzGame2.dll", "cmake-build\\libPuzGame.dll", false))
{
printf("Failed to copy game DLL!\n");
}
HMODULE gameLibReloaded = LoadLibraryEx(DLLPath, NULL, 0);
if (gameLibReloaded == NULL)
{
printf("Failed to load game DLL from %s!\n", DLLPath);
return false;
}
DevData.GameLib = gameLibReloaded;
#ifdef VISUAL_STUDIO
Startup StartupReloaded = (Startup)GetProcAddress(DevData.GameLib, "?Setup@Game@@YAXPEAX@Z");
#else
Startup StartupReloaded = (Startup)GetProcAddress(DevData.GameLib, "_ZN4Game5SetupEPv");
#endif
if (StartupReloaded == NULL)
{
printf("Failed to load startup function from game DLL!\n");
return false;
}
#ifdef VISUAL_STUDIO
Update UpdateReloaded = (Update)GetProcAddress(DevData.GameLib, "?Update@Game@@YAXXZ");
#else
Update UpdateReloaded = (Update)GetProcAddress(DevData.GameLib, "_ZN4Game6UpdateEv");
#endif
if (UpdateReloaded == NULL)
{
printf("Failed to load update function from game DLL!\n");
return false;
}
StartupFunc = StartupReloaded;
UpdateFunc = UpdateReloaded;
printf("Loaded Game DLL successfully!\n");
return true;
}
int main()
{
HWND window = InitWindow();
if (window == NULL) return 1;
char Buf[512];
GetCurrentDirectoryA(sizeof(Buf), Buf);
#ifdef VISUAL_STUDIO
const char* dllPath = "Debug/PuzGame.dll";
#else
const char* dllPath = "libPuzGame.dll";
#endif
HMODULE gameLibModule = LoadLibraryEx(dllPath, NULL, 0);
if (gameLibModule == NULL)
{
printf("Failed to load game DLL from %s!", dllPath);
return 1;
}
if (!ReloadDLL()) return 1;
#ifdef VISUAL_STUDIO
Startup StartFunc = (Startup)GetProcAddress(gameLibModule, "?Setup@Game@@YAXPEAX@Z");
#else
Startup StartFunc = (Startup)GetProcAddress(gameLibModule, "_ZN4Game5SetupEPv");
#endif
if (StartFunc == NULL)
{
printf("Failed to load startup function from game DLL!\n");
return 1;
}
#ifdef VISUAL_STUDIO
Update UpdateFunc = (Update)GetProcAddress(gameLibModule, "?Update@Game@@YAXXZ");
#else
Update UpdateFunc = (Update)GetProcAddress(gameLibModule, "_ZN4Game6UpdateEv");
#endif
if (UpdateFunc == NULL)
{
printf("Failed to load update function from game DLL!\n");
return 1;
}
printf("Loaded Game DLL successfully!\n");
bgfx::Init init;
init.platformData.nwh = (void*)window;
init.platformData.ndt = nullptr;
init.platformData.type = bgfx::NativeWindowHandleType::Default;
init.resolution.width = 1920;
init.resolution.height = 1080;
init.resolution.reset = BGFX_RESET_VSYNC;
bgfx::init(init);
StartupFunc(window);
DWORD fileWatcherThreadId = 0;
CreateThread(NULL, 0, FileWatcherThread, NULL, 0, &fileWatcherThreadId);
StartFunc(window);
bool isRunning = true;
while (isRunning)
{
MSG Message;
BOOL MessageResult = GetMessage(&Message, 0, 0, 0);
if (MessageResult > 0)
{
TranslateMessage(&Message);
DispatchMessageW(&Message);
MSG msg;
while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
if (msg.message == WM_QUIT)
{
}
TranslateMessage(&msg);
DispatchMessage(&msg);
}
// UpdateFunc();
// Sleep(1000.0);
if (DevData.FileWatcher.Change)
{
DevData.FileWatcher.Change = false;
ReloadDLL();
}
UpdateFunc();
}
return 0;
}