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https://github.com/golang/go
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c007ce824d
Preparation was in CL 134570043. This CL contains only the effect of 'hg mv src/pkg/* src'. For more about the move, see golang.org/s/go14nopkg.
57 lines
1.6 KiB
Go
57 lines
1.6 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime
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import "unsafe"
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// Breakpoint executes a breakpoint trap.
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func Breakpoint()
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// LockOSThread wires the calling goroutine to its current operating system thread.
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// Until the calling goroutine exits or calls UnlockOSThread, it will always
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// execute in that thread, and no other goroutine can.
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func LockOSThread()
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// UnlockOSThread unwires the calling goroutine from its fixed operating system thread.
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// If the calling goroutine has not called LockOSThread, UnlockOSThread is a no-op.
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func UnlockOSThread()
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// GOMAXPROCS sets the maximum number of CPUs that can be executing
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// simultaneously and returns the previous setting. If n < 1, it does not
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// change the current setting.
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// The number of logical CPUs on the local machine can be queried with NumCPU.
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// This call will go away when the scheduler improves.
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func GOMAXPROCS(n int) int {
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g := getg()
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g.m.scalararg[0] = uintptr(n)
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onM(gomaxprocs_m)
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n = int(g.m.scalararg[0])
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g.m.scalararg[0] = 0
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return n
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}
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func gomaxprocs_m() // proc.c
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// NumCPU returns the number of logical CPUs on the local machine.
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func NumCPU() int {
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return int(ncpu)
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}
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// NumCgoCall returns the number of cgo calls made by the current process.
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func NumCgoCall() int64 {
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var n int64
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for mp := (*m)(atomicloadp(unsafe.Pointer(&allm))); mp != nil; mp = mp.alllink {
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n += int64(mp.ncgocall)
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}
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return n
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}
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// NumGoroutine returns the number of goroutines that currently exist.
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func NumGoroutine() int {
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return int(gcount())
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}
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func gcount() int32
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