// license that can be found in the LICENSE file.

//go:build !faketime

package runtime

import "unsafe"

// faketime is the simulated time in nanoseconds since 1970 for the
// playground.
//
// Zero means not to use faketime.
var faketime int64

// Exported via linkname for use by time and internal/poll.
//
// Many external packages also linkname nanotime for a fast monotonic time.

// translating the Stdout and Stderr handles into FDs 1 and 2.
// (See CL 192739 PS 3.)

package runtime

import "unsafe"

// faketime is the simulated time in nanoseconds since 1970 for the
// playground.
var faketime int64 = 1257894000000000000

var faketimeState struct {
	lock mutex

	// lastfaketime is the last faketime value written to fd 1 or 2.
	lastfaketime int64

        "trail",
        "wing",
        "ring",
        "desk",
        "yak",
        "teaching",
        "street",
        "cattle",
        "sun",
        "wealth",
        "cabbage",
        "playground",
        "wren",
        "flowers",
        "cobweb",
        "shame",
        "plate",
        "authority",
        "cave",
        "floor",
        "shelf",
        "snakes",
        "ants",

-->

<!-- Items that don't need to be mentioned in Go 1.23 release notes but are picked up by relnote todo.

CL 458895 - an x/playground fix that mentioned an accepted cmd/go proposal go.dev/issue/40728 in Go 1.16 milestone...
CL 582097 - an x/build CL working on relnote itself; it doesn't need a release note

		ld.Elfinit(ctxt)
		ld.HEADR = ld.ELFRESERVE
		if *ld.FlagRound == -1 {
			*ld.FlagRound = 0x10000
		}
		if *ld.FlagTextAddr == -1 {
			*ld.FlagTextAddr = ld.Rnd(0x10000, *ld.FlagRound) + int64(ld.HEADR)
		}

	case objabi.Hwindows: /* PE executable */
		// ld.HEADR, ld.FlagTextAddr, ld.FlagRound are set in ld.Peinit
		return
	}

	case objabi.Hplan9: /* plan 9 */
		ld.HEADR = 32
		if *ld.FlagRound == -1 {
			*ld.FlagRound = 4096
		}
		if *ld.FlagTextAddr == -1 {
			*ld.FlagTextAddr = ld.Rnd(4096, *ld.FlagRound) + int64(ld.HEADR)
		}

	case objabi.Hlinux, /* ppc64 elf */
		objabi.Hopenbsd:
		ld.Elfinit(ctxt)
		ld.HEADR = ld.ELFRESERVE
		if *ld.FlagRound == -1 {
			*ld.FlagRound = 0x10000
		}
		if *ld.FlagTextAddr == -1 {

		ld.HEADR = 32
		if *ld.FlagRound == -1 {
			*ld.FlagRound = 4096
		}
		if *ld.FlagTextAddr == -1 {
			*ld.FlagTextAddr = ld.Rnd(4096, *ld.FlagRound) + int64(ld.HEADR)
		}

	case objabi.Hlinux, /* elf32 executable */
		objabi.Hfreebsd,
		objabi.Hnetbsd,
		objabi.Hopenbsd:
		ld.Elfinit(ctxt)

		ld.HEADR = ld.ELFRESERVE
		if *ld.FlagRound == -1 {
			*ld.FlagRound = 4096
		}

	case objabi.Hplan9: /* plan 9 */
		ld.HEADR = 32 + 8
		if *ld.FlagRound == -1 {
			*ld.FlagRound = 0x200000
		}
		if *ld.FlagTextAddr == -1 {
			*ld.FlagTextAddr = ld.Rnd(0x200000, *ld.FlagRound) + int64(ld.HEADR)
		}

	case objabi.Hdarwin: /* apple MACH */
		ld.HEADR = ld.INITIAL_MACHO_HEADR
		if *ld.FlagRound == -1 {
			*ld.FlagRound = 4096
		}
		if *ld.FlagTextAddr == -1 {

		ld.HEADR = 32
		if *ld.FlagRound == -1 {
			*ld.FlagRound = 4096
		}
		if *ld.FlagTextAddr == -1 {
			*ld.FlagTextAddr = ld.Rnd(4096, *ld.FlagRound) + int64(ld.HEADR)
		}

	case objabi.Hlinux, /* arm64 elf */
		objabi.Hfreebsd,
		objabi.Hnetbsd,
		objabi.Hopenbsd:
		ld.Elfinit(ctxt)
		ld.HEADR = ld.ELFRESERVE
		if *ld.FlagRound == -1 {
			*ld.FlagRound = 0x10000
		}
		if *ld.FlagTextAddr == -1 {

	default:
		ld.Exitf("unknown -H option: %v", ctxt.HeadType)
	case objabi.Hlinux: /* loong64 elf */
		ld.Elfinit(ctxt)
		ld.HEADR = ld.ELFRESERVE
		if *ld.FlagRound == -1 {
			*ld.FlagRound = 0x10000
		}
		if *ld.FlagTextAddr == -1 {
			*ld.FlagTextAddr = ld.Rnd(0x10000, *ld.FlagRound) + int64(ld.HEADR)
		}
	}