//go:linkname Xaddint32
//go:linkname Xaddint64
//go:linkname Xadd64
//go:linkname Xadduintptr
//go:linkname Xchg
//go:linkname Xchg64
//go:linkname Xchgint32
//go:linkname Xchgint64
//go:linkname Xchguintptr
//go:linkname Cas
//go:linkname Cas64
//go:linkname Casint32
//go:linkname Casint64
//go:linkname Casuintptr
//go:linkname Store
//go:linkname Store64
//go:linkname Storeint32
//go:linkname Storeint64
//go:linkname Storeuintptr

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//go:build !wasm

package atomic

import "unsafe"

//go:noescape
func Cas(ptr *uint32, old, new uint32) bool

// NO go:noescape annotation; see atomic_pointer.go.
func Casp1(ptr *unsafe.Pointer, old, new unsafe.Pointer) bool

//go:noescape
func Casint32(ptr *int32, old, new int32) bool

@ElementTypesAreNonnullByDefault
// Some Android 5.0.x Samsung devices have bugs in JDK reflection APIs that cause
// getDeclaredField to throw a NoSuchFieldException when the field is definitely there.
// Since this class only needs CAS on one field, we can avoid this bug by extending AtomicReference
// instead of using an AtomicReferenceFieldUpdater. This reference stores Thread instances
// and DONE/INTERRUPTED - they have a common ancestor of Runnable.

		for i := 0; i < spin; i++ {
			for l.key == mutex_unlocked {
				if atomic.Cas(key32(&l.key), mutex_unlocked, wait) {
					timer.end()
					return
				}
			}
			procyield(active_spin_cnt)
		}

		// Try for lock, rescheduling.
		for i := 0; i < passive_spin; i++ {
			for l.key == mutex_unlocked {
				if atomic.Cas(key32(&l.key), mutex_unlocked, wait) {
					timer.end()
					return
				}
			}

@ElementTypesAreNonnullByDefault
// Some Android 5.0.x Samsung devices have bugs in JDK reflection APIs that cause
// getDeclaredField to throw a NoSuchFieldException when the field is definitely there.
// Since this class only needs CAS on one field, we can avoid this bug by extending AtomicReference
// instead of using an AtomicReferenceFieldUpdater. This reference stores Thread instances
// and DONE/INTERRUPTED - they have a common ancestor of Runnable.

	data = data[2:]
	if len(data) < int(casLength) {
		return false
	}
	cas := make([]byte, casLength)
	copy(cas, data)
	data = data[casLength:]

	m.certificateAuthorities = nil
	for len(cas) > 0 {
		if len(cas) < 2 {
			return false
		}
		caLen := uint16(cas[0])<<8 | uint16(cas[1])
		cas = cas[2:]

		if len(cas) < int(caLen) {
			return false
		}

!!! note "Remarque"
    Les sections de ce chapitre ne sont **pas nécessairement "avancées"**.

    Et il est possible que pour votre cas d'utilisation, la solution se trouve dans l'un d'entre eux.

## Lisez d'abord le didacticiel

et de le réparer, d'arrêter et de redémarrer le serveur de développement, _etc._

## Stratégies de déploiement

Il existe plusieurs façons de procéder, en fonction de votre cas d'utilisation spécifique et des outils que vous
utilisez.

Vous pouvez **déployer un serveur** vous-même en utilisant une combinaison d'outils, vous pouvez utiliser un **service

	MOVD   0(R3), R3
	CMP    R3, R3, CR7
	BC     4, 30, 1(PC) // bne- cr7, 0x4
	ISYNC
	MOVD   R3, ret+8(FP)
	RET

// bool cas(uint32 *ptr, uint32 old, uint32 new)
// Atomically:
//	if(*val == old){
//		*val = new;
//		return 1;
//	} else
//		return 0;
TEXT ·Cas(SB), NOSPLIT, $0-17
	MOVD	ptr+0(FP), R3
	MOVWZ	old+8(FP), R4
	MOVWZ	new+12(FP), R5
	LWSYNC
cas_again:
	LWAR	(R3), R6
	CMPW	R6, R4

	}()
	for SemNwait(&sema) == 0 {
		Gosched() // wait for goroutine to block in Semacquire
	}

	// The crux of the test: we release the semaphore with handoff
	// and immediately perform a CAS both here and in the waiter; we
	// want the CAS in the waiter to execute first.
	Semrelease1(&sema, true, 0)
	atomic.CompareAndSwapUint32(&res, 0, 2)

	wg.Wait() // wait for goroutines to finish to avoid data races