//go:cgo_import_dynamic libc_utimensat utimensat "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func pledge(promises *byte, execpromises *byte) (err error) {
	_, _, e1 := syscall_syscall(libc_pledge_trampoline_addr, uintptr(unsafe.Pointer(promises)), uintptr(unsafe.Pointer(execpromises)), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_pledge_trampoline_addr uintptr

//go:cgo_import_dynamic libc_utimensat utimensat "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func pledge(promises *byte, execpromises *byte) (err error) {
	_, _, e1 := syscall_syscall(libc_pledge_trampoline_addr, uintptr(unsafe.Pointer(promises)), uintptr(unsafe.Pointer(execpromises)), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_pledge_trampoline_addr uintptr

//go:cgo_import_dynamic libc_utimensat utimensat "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func pledge(promises *byte, execpromises *byte) (err error) {
	_, _, e1 := syscall_syscall(libc_pledge_trampoline_addr, uintptr(unsafe.Pointer(promises)), uintptr(unsafe.Pointer(execpromises)), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_pledge_trampoline_addr uintptr

//go:cgo_import_dynamic libc_utimensat utimensat "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func pledge(promises *byte, execpromises *byte) (err error) {
	_, _, e1 := syscall_syscall(libc_pledge_trampoline_addr, uintptr(unsafe.Pointer(promises)), uintptr(unsafe.Pointer(execpromises)), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_pledge_trampoline_addr uintptr

//go:cgo_import_dynamic libc_utimensat utimensat "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func pledge(promises *byte, execpromises *byte) (err error) {
	_, _, e1 := syscall_syscall(libc_pledge_trampoline_addr, uintptr(unsafe.Pointer(promises)), uintptr(unsafe.Pointer(execpromises)), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_pledge_trampoline_addr uintptr

//go:cgo_import_dynamic libc_utimensat utimensat "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func pledge(promises *byte, execpromises *byte) (err error) {
	_, _, e1 := syscall_syscall(libc_pledge_trampoline_addr, uintptr(unsafe.Pointer(promises)), uintptr(unsafe.Pointer(execpromises)), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_pledge_trampoline_addr uintptr

//go:cgo_import_dynamic libc_utimensat utimensat "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func pledge(promises *byte, execpromises *byte) (err error) {
	_, _, e1 := syscall_syscall(libc_pledge_trampoline_addr, uintptr(unsafe.Pointer(promises)), uintptr(unsafe.Pointer(execpromises)), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_pledge_trampoline_addr uintptr

limitations under the License.
*/

package promise

import (
	"context"
	"sync"
)

// promise implements the WriteOnce interface.
type promise struct {
	doneCtx context.Context
	doneVal interface{}
	setCh   chan struct{}
	onceler sync.Once
	value   interface{}
}

var _ WriteOnce = &promise{}

// NewWriteOnce makes a new thread-safe WriteOnce.
//

q̂ = ⌊uₙuₙ₋₁ / vₙ₋₁⌋ into the refined guess ⌊uₙuₙ₋₁uₙ₋₂ / vₙ₋₁vₙ₋₂⌋.
Although not mentioned above, the Good Guess Guarantee also promises that this
3-by-2-digit division guess is more precise and at most one away from the real
answer q. The improvement from the 2-by-1 to the 3-by-2 guess can also be done
without n-digit math.

If we have a guess q̂ = ⌊uₙuₙ₋₁ / vₙ₋₁⌋ and we want to see if it also equal to

  xml.namespace="http://maven.apache.org/PROFILES/${version}"
  xml.schemaLocation="http://maven.apache.org/xsd/profiles-${version}.xsd">
  <id>profiles</id>
  <name>Profiles</name>
  <description><![CDATA[
    <b>Deprecated in Maven 2</b> Project-local overrides to the build process based on detected or user-provided environmental parameters.
    This is the model specification for <code>${basedir}/profiles.xml</code>.
  ]]></description>