74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
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typedef struct W32_AppCode W32_AppCode;
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struct W32_AppCode
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{
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ApplicationPermanentLoadCallback *PermanentLoad;
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ApplicationHotLoadCallback *HotLoad;
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ApplicationHotUnloadCallback *HotUnload;
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ApplicationUpdateCallback *Update;
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HMODULE dll;
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FILETIME last_dll_write_time;
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};
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internal b32
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W32_AppCodeLoad(W32_AppCode *app_code)
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{
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b32 result = 1;
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CopyFile(global_app_dll_path, global_temp_app_dll_path, FALSE);
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app_code->dll = LoadLibraryA(global_temp_app_dll_path);
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app_code->last_dll_write_time = W32_GetLastWriteTime(global_app_dll_path);
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if(!app_code->dll)
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{
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result = 0;
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goto end;
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}
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app_code->PermanentLoad = (void *)GetProcAddress(app_code->dll, "PermanentLoad");
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app_code->HotLoad = (void *)GetProcAddress(app_code->dll, "HotLoad");
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app_code->HotUnload = (void *)GetProcAddress(app_code->dll, "HotUnload");
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app_code->Update = (void *)GetProcAddress(app_code->dll, "Update");
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if(!app_code->PermanentLoad || !app_code->HotLoad || !app_code->HotUnload || !app_code->Update)
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{
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app_code->PermanentLoad = ApplicationPermanentLoadStub;
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app_code->HotLoad = ApplicationHotLoadStub;
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app_code->HotUnload = ApplicationHotUnloadStub;
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app_code->Update = ApplicationUpdateStub;
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result = 0;
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goto end;
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}
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end:;
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return result;
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}
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internal void
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W32_AppCodeUnload(W32_AppCode *app_code)
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{
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if(app_code->dll)
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{
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FreeLibrary(app_code->dll);
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}
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app_code->dll = 0;
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app_code->PermanentLoad = ApplicationPermanentLoadStub;
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app_code->HotLoad = ApplicationHotLoadStub;
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app_code->HotUnload = ApplicationHotUnloadStub;
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app_code->Update = ApplicationUpdateStub;
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}
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internal void
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W32_AppCodeUpdate(W32_AppCode *app_code)
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{
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FILETIME last_write_time = W32_GetLastWriteTime(global_app_dll_path);
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if(CompareFileTime(&last_write_time, &app_code->last_dll_write_time))
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{
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app_code->HotUnload();
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W32_AppCodeUnload(app_code);
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W32_AppCodeLoad(app_code);
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app_code->HotLoad(&global_os);
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}
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}
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