| // Copyright 2024 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 sync | |
| import _ "unsafe" | |
| // defined in package runtime | |
| // SemacquireMutex is like Semacquire, but for profiling contended | |
| // Mutexes and RWMutexes. | |
| // If lifo is true, queue waiter at the head of wait queue. | |
| // skipframes is the number of frames to omit during tracing, counting from | |
| // runtime_SemacquireMutex's caller. | |
| // The different forms of this function just tell the runtime how to present | |
| // the reason for waiting in a backtrace, and is used to compute some metrics. | |
| // Otherwise they're functionally identical. | |
| // | |
| //go:linkname runtime_SemacquireMutex | |
| func runtime_SemacquireMutex(s *uint32, lifo bool, skipframes int) | |
| // Semrelease atomically increments *s and notifies a waiting goroutine | |
| // if one is blocked in Semacquire. | |
| // It is intended as a simple wakeup primitive for use by the synchronization | |
| // library and should not be used directly. | |
| // If handoff is true, pass count directly to the first waiter. | |
| // skipframes is the number of frames to omit during tracing, counting from | |
| // runtime_Semrelease's caller. | |
| // | |
| //go:linkname runtime_Semrelease | |
| func runtime_Semrelease(s *uint32, handoff bool, skipframes int) | |
| // Active spinning runtime support. | |
| // runtime_canSpin reports whether spinning makes sense at the moment. | |
| // | |
| //go:linkname runtime_canSpin | |
| func runtime_canSpin(i int) bool | |
| // runtime_doSpin does active spinning. | |
| // | |
| //go:linkname runtime_doSpin | |
| func runtime_doSpin() | |
| //go:linkname runtime_nanotime | |
| func runtime_nanotime() int64 | |
| //go:linkname throw | |
| func throw(string) | |
| //go:linkname fatal | |
| func fatal(string) | |