#cgo solaris CPPFLAGS: -D_POSIX_PTHREAD_SEMANTICS

*/
import "C"

import "runtime/internal/sys"

// Incomplete is used specifically for the semantics of incomplete C types.
type Incomplete struct {
	_ sys.NotInHeap

func PtrDataSize(t *Type) int64 {
	CalcSize(t)
	x := t.ptrBytes
	if t.Kind() == TPTR && t.Elem().NotInHeap() {
		// Note: this is done here instead of when we're setting
		// the ptrBytes field, because at that time (in NewPtr, usually)
		// the NotInHeap bit of the element type might not be set yet.
		x = 0
	}
	return x

// Must be smaller than or equal to workbuf.
type stackWorkBuf struct {
	_ sys.NotInHeap
	stackWorkBufHdr
	obj [(_WorkbufSize - unsafe.Sizeof(stackWorkBufHdr{})) / goarch.PtrSize]uintptr
}

// Header declaration must come after the buf declaration above, because of issue #14620.
type stackWorkBufHdr struct {
	_ sys.NotInHeap
	workbufhdr
	next *stackWorkBuf // linked list of workbufs

// errorcheck -+ -0 -l -d=wb

// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Test write barrier elimination for notinheap.

//go:build cgo

package p

import "runtime/cgo"

type t1 struct {
	x *nih
	s []nih
	y [1024]byte // Prevent write decomposition
}

type t2 struct {
	x *ih
	s []ih
	y [1024]byte

type notInHeap struct{ _ sys.NotInHeap }

func (p *notInHeap) add(bytes uintptr) *notInHeap {
	return (*notInHeap)(unsafe.Pointer(uintptr(unsafe.Pointer(p)) + bytes))
}

// computeRZlog computes the size of the redzone.
// Refer to the implementation of the compiler-rt.
func computeRZlog(userSize uintptr) uintptr {
	switch {
	case userSize <= (64 - 16):

		r := sysReserve(nil, b)
		if r == nil {
			throw("failed to reserve page summary memory")
		}

		// Put this reservation into a slice.
		sl := notInHeapSlice{(*notInHeap)(r), 0, entries}
		p.summary[l] = *(*[]pallocSum)(unsafe.Pointer(&sl))
	}
}

// sysGrow performs architecture-dependent operations on heap
// growth for the page allocator, such as mapping in new memory

// per-arena bitmap with a bit for every word in the arena. The mark
// is stored on the bit corresponding to the first word of the marked
// allocation.
type checkmarksMap struct {
	_ sys.NotInHeap
	b [heapArenaBytes / goarch.PtrSize / 8]uint8
}

// If useCheckmark is true, marking of an object uses the checkmark
// bits instead of the standard mark bits.
var useCheckmark = false

	// the new slice should start.
	for l, shift := range levelShift {
		entries := 1 << (heapAddrBits - shift)

		// Put this reservation into a slice.
		sl := notInHeapSlice{(*notInHeap)(reservation), 0, entries}
		p.summary[l] = *(*[]pallocSum)(unsafe.Pointer(&sl))

		reservation = add(reservation, uintptr(entries)*pallocSumBytes)
	}
}

// See mpagealloc_64bit.go for details.

	sysStat *sysMemStat
}

func (a *addrRanges) init(sysStat *sysMemStat) {
	ranges := (*notInHeapSlice)(unsafe.Pointer(&a.ranges))
	ranges.len = 0
	ranges.cap = 16
	ranges.array = (*notInHeap)(persistentalloc(unsafe.Sizeof(addrRange{})*uintptr(ranges.cap), goarch.PtrSize, sysStat))
	a.sysStat = sysStat
	a.totalBytes = 0
}

// findSucc returns the first index in a such that addr is

		l.w.varint(-1)
	}

	return l
}

// A dlogger writes to the debug log.
//
// To obtain a dlogger, call dlog(). When done with the dlogger, call
// end().
type dlogger struct {
	_ sys.NotInHeap
	w debugLogWriter

	// allLink is the next dlogger in the allDloggers list.
	allLink *dlogger

	// owned indicates that this dlogger is owned by an M. This is
	// accessed atomically.
	owned atomic.Uint32