Why some funcs in dll_windows.go can be declared without a function body?
The code: https://golang.org/src/syscall/dll_windows.go
// Implemented in ../runtime/syscall_windows.go.
func Syscall(trap, nargs, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
I used to be a windows C++ programmer, I can guess such functions are for invoking windows native library methods.
I realy want to know how to make it happen that the code
r0, _, e1 := Syscall9(procCreateFileW.Addr(), 7, uintptr(unsafe.Pointer(name)), uintptr(access), uintptr(mode), uintptr(unsafe.Pointer(sa)), uintptr(createmode), uintptr(attrs), uintptr(templatefile), 0, 0)
[CreateFile, 294, zsyscall_windows.go]
invokes
func syscall_Syscall9(fn, nargs, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, err uintptr) {
c := &getg().m.syscall
c.fn = fn
c.n = nargs
c.args = uintptr(noescape(unsafe.Pointer(&a1)))
cgocall(asmstdcallAddr, unsafe.Pointer(c))
return c.r1, c.r2, c.err
}
[syscall_Syscall9, 180, runtime\syscall_windows.go]
From my point of view, the signatures (invoking and invoked) are different, really interesting…
