| Platform | Resource Type | Close Function | |----------|---------------|----------------| | Windows | HANDLE | CloseHandle | | Linux / macOS | file descriptor | close (syscall or libc) | | WebAssembly (WASI) | fd | fd_close |
init_program :: proc() my_handle := CreateFile(...) runtime.add_cleanup(cleanup_my_resource, &my_handle) odin rqt-close
if my_handle != INVALID_HANDLE CloseHandle(my_handle) my_handle = INVALID_HANDLE | Platform | Resource Type | Close Function
h := CreateFile("data.txt", ...) defer CloseHandle(h) // Guaranteed to run on scope exit // ... use h ... It forces you to think about resource lifetimes
A typical Odin solution uses conditional compilation:
Odin’s lack of automatic cleanup is a feature, not a bug. It forces you to think about resource lifetimes at every step, leading to more predictable and often more efficient software. The rqt-close pattern—whether you name it that or simply call CloseHandle directly—is the cornerstone of robust system programming in Odin.
close_resource :: proc(resource: ^Raw_Resource) when ODIN_OS == "windows" sys.windows.CloseHandle(resource.handle) else when ODIN_OS == "linux" sys.linux.close(resource.fd) resource.valid = false