)

// Use global variables so the compiler
// doesn't know that they are constants.
var p = syscall.Getpagesize()
var zero = 0
var one = 1

func main() {
	// Allocate 2 pages of memory.
	b, err := syscall.Mmap(-1, 0, 2*p, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_ANON|syscall.MAP_PRIVATE)
	if err != nil {
		panic(err)
	}
	// Mark the second page as faulting.
	err = syscall.Mprotect(b[p:], syscall.PROT_NONE)

					g := b[i]
					if f.Id() != g.Id() || !c.identical(f.typ, g.typ, q) {
						return false
					}
				}
				return true
			}
		}

	case *Map:
		// Two map types are identical if they have identical key and value types.
		if y, ok := y.(*Map); ok {
			return c.identical(x.key, y.key, p) && c.identical(x.elem, y.elem, p)
		}

	case *Chan:

	// which we don't know the size.
	if ctxt.Arch.Family != sys.Wasm {
		// Don't mmap if we're building for Wasm. Wasm file
		// layout is very different so filesize is meaningless.
		if err := ctxt.Out.Mmap(filesize); err != nil {
			Exitf("mapping output file failed: %v", err)
		}
	}
	// asmb will redirect symbols to the output file mmap, and relocations
	// will be applied directly there.
	bench.Start("Asmb")
	asmb(ctxt)

}

func setTimeval(sec, usec int64) Timeval {
	return Timeval{Sec: sec, Usec: usec}
}

// Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct.
// mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>.
func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {

func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
	rsa.Service_name_len = uint64(length)
}

// Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct.
// mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>.
func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {

func sharedMemMapFile(f *os.File, size int, removeOnClose bool) (*sharedMem, error) {
	prot := syscall.PROT_READ | syscall.PROT_WRITE
	flags := syscall.MAP_FILE | syscall.MAP_SHARED
	region, err := syscall.Mmap(int(f.Fd()), 0, size, prot, flags)
	if err != nil {
		return nil, err
	}

	return &sharedMem{f: f, region: region, removeOnClose: removeOnClose}, nil
}

# Giới thiệu kiểu dữ liệu Python

Python hỗ trợ tùy chọn "type hints" (còn được gọi là "type annotations").

Những **"type hints"** hay chú thích là một cú pháp đặc biệt cho phép khai báo <abbr title="ví dụ: str, int, float, bool"> kiểu dữ liệu</abbr> của một biến.

Bằng việc khai báo kiểu dữ liệu cho các biến của bạn, các trình soạn thảo và các công cụ có thể hỗ trợ bạn tốt hơn.

}

// Open prepares telemetry counters for recording to the file system.
//
// If the telemetry mode is "off", Open is a no-op. Otherwise, it opens the
// counter file on disk and starts to mmap telemetry counters to the file.
// Open also persists any counters already created in the current process.
//
// Programs using telemetry should call Open exactly once.
func Open() {
	counter.Open()
}

			}
		}
		return true

	case TARRAY:
		if t1.NumElem() != t2.NumElem() {
			return false
		}

	case TCHAN:
		if t1.ChanDir() != t2.ChanDir() {
			return false
		}

	case TMAP:
		if !identical(t1.Key(), t2.Key(), flags, assumedEqual) {
			return false
		}
	}

	return identical(t1.Elem(), t2.Elem(), flags, assumedEqual)

	// code.
	if origSig.RecvTypeParams().Len() == t.inst.targs.Len() {
		smap := makeSubstMap(origSig.RecvTypeParams().list(), t.inst.targs.list())
		var ctxt *Context
		if check != nil {
			ctxt = check.context()
		}
		sig = check.subst(origm.pos, origSig, smap, t, ctxt).(*Signature)
	}

	if sig == origSig {