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

// Declarations for operating systems implementing time.now
// indirectly, in terms of walltime and nanotime assembly.

//go:build !faketime && !windows && !(linux && amd64)

package runtime

import _ "unsafe" // for go:linkname

// time_now should be an internal detail,

func munmap(addr unsafe.Pointer, n uintptr)

func nanotime1() int64

//go:noescape
func sigaltstack(new, old *stackt)

func fcntl(fd, cmd, arg int32) (ret int32, errno int32)

func walltime() (sec int64, nsec int32)

func nanotime1() int64 {
	bt := vdsoClockGettime(_CLOCK_MONOTONIC)
	if bt == zeroBintime {
		return fallback_nanotime()
	}
	return int64((1e9 * uint64(bt.sec)) + ((1e9 * uint64(bt.frac>>32)) >> 32))
}

func walltime() (sec int64, nsec int32) {
	bt := vdsoClockGettime(_CLOCK_REALTIME)
	if bt == zeroBintime {
		return fallback_walltime()
	}
	return int64(bt.sec), int32((1e9 * uint64(bt.frac>>32)) >> 32)

}
func nanotime_trampoline()

// walltime should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
//   - gitee.com/quant1x/gox
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname walltime
//go:nosplit
//go:cgo_unsafe_args
func walltime() (int64, int32) {
	var t timespec

			return ""
		case "seed":
			checkEnabled = true
			checkRandSeed = val
			debugPoset = checkEnabled
			return ""
		}
	}

	alltime := false
	allmem := false
	alldump := false
	if phase == "all" {
		switch flag {
		case "time":
			alltime = val != 0
		case "mem":
			allmem = val != 0
		case "dump":
			alldump = val != 0
			if alldump {
				BuildDump[valString] = true

		systemstack(func() {
			println("runtime: errno", -errno)
			throw("clock_gettime failed")
		})
	}
	return ts.tv_sec*1e9 + int64(ts.tv_nsec)
}
func clock_gettime_trampoline()

//go:nosplit
func walltime() (int64, int32) {
	var ts timespec
	args := struct {
		clock_id int32
		tp       unsafe.Pointer
	}{_CLOCK_REALTIME, unsafe.Pointer(&ts)}

//go:nosplit
func nanotime1() int64 {
	tp := &timespec{}
	if clock_gettime(_CLOCK_REALTIME, tp) != 0 {
		throw("syscall clock_gettime failed")
	}
	return tp.tv_sec*1000000000 + tp.tv_nsec
}

func walltime() (sec int64, nsec int32) {
	ts := &timespec{}
	if clock_gettime(_CLOCK_REALTIME, ts) != 0 {
		throw("syscall clock_gettime failed")
	}
	return ts.tv_sec, int32(ts.tv_nsec)
}

//go:nosplit

}

func usleep1(usec uint32)

//go:nosplit
func usleep_no_g(µs uint32) {
	usleep1(µs)
}

//go:nosplit
func usleep(µs uint32) {
	usleep1(µs)
}

func walltime() (sec int64, nsec int32) {
	var ts mts
	sysvicall2(&libc_clock_gettime, _CLOCK_REALTIME, uintptr(unsafe.Pointer(&ts)))
	return ts.tv_sec, int32(ts.tv_nsec)
}

//go:nosplit

                                  meta_graph.saver_def().filename_tensor_name(),
                                  asset_file_defs, session->get()));
  }
  // Record walltime spent in restoring graph from disk, but postpone metric
  // increments until graph init finishes.
  const uint64 restore_graph_walltime =
      GetLatencyMicroseconds(read_start_microseconds);

	MOVD	addr+0(FP), R3
	MOVD	n+8(FP), R4
	MOVD	dst+16(FP), R5
	SYSCALL	$SYS_mincore
	NEG	R3		// caller expects negative errno
	MOVW	R3, ret+24(FP)
	RET

// func walltime() (sec int64, nsec int32)
TEXT runtime·walltime(SB),NOSPLIT,$16-12
	MOVD	R1, R15		// R15 is unchanged by C code
	MOVD	g_m(g), R21	// R21 = m

	MOVD	$0, R3		// CLOCK_REALTIME