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-rw-r--r--src/runtime/debug.go63
1 files changed, 63 insertions, 0 deletions
diff --git a/src/runtime/debug.go b/src/runtime/debug.go
new file mode 100644
index 0000000..f411b22
--- /dev/null
+++ b/src/runtime/debug.go
@@ -0,0 +1,63 @@
+// Copyright 2009 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.
+
+package runtime
+
+import (
+ "runtime/internal/atomic"
+ "unsafe"
+)
+
+// GOMAXPROCS sets the maximum number of CPUs that can be executing
+// simultaneously and returns the previous setting. It defaults to
+// the value of runtime.NumCPU. If n < 1, it does not change the current setting.
+// This call will go away when the scheduler improves.
+func GOMAXPROCS(n int) int {
+ if GOARCH == "wasm" && n > 1 {
+ n = 1 // WebAssembly has no threads yet, so only one CPU is possible.
+ }
+
+ lock(&sched.lock)
+ ret := int(gomaxprocs)
+ unlock(&sched.lock)
+ if n <= 0 || n == ret {
+ return ret
+ }
+
+ stopTheWorldGC("GOMAXPROCS")
+
+ // newprocs will be processed by startTheWorld
+ newprocs = int32(n)
+
+ startTheWorldGC()
+ return ret
+}
+
+// NumCPU returns the number of logical CPUs usable by the current process.
+//
+// The set of available CPUs is checked by querying the operating system
+// at process startup. Changes to operating system CPU allocation after
+// process startup are not reflected.
+func NumCPU() int {
+ return int(ncpu)
+}
+
+// NumCgoCall returns the number of cgo calls made by the current process.
+func NumCgoCall() int64 {
+ var n int64
+ for mp := (*m)(atomic.Loadp(unsafe.Pointer(&allm))); mp != nil; mp = mp.alllink {
+ n += int64(mp.ncgocall)
+ }
+ return n
+}
+
+// NumGoroutine returns the number of goroutines that currently exist.
+func NumGoroutine() int {
+ return int(gcount())
+}
+
+//go:linkname debug_modinfo runtime/debug.modinfo
+func debug_modinfo() string {
+ return modinfo
+}