Mutex Try-Lock Coordination Report

Record nonblocking lock attempts and report whether a later attempt was blocked.

Mutex Try-Lock Coordination Report

mutex_trylock_coordination_report.go

package main

import (
	"fmt"
	"sync"
)

func main() {
	var holds = 
	var lock sync.Mutex
	acquired := 0
	blocked := 0
	for i := 0; i < holds; i++ {
		ok := lock.TryLock()
		if ok {
			acquired++
		} else {
			blocked++
		}
	}
	var status string
	if acquired == 0 {
		status = "idle"
	} else if blocked > 0 {
		status = "blocked"
	} else {
		status = "guarded"
	}
	fmt.Printf("holds=%d acquired=%d blocked=%d %s\n", holds, acquired, blocked, status)
}

package main

import (
	"fmt"
	"sync"
)

func main() {
	var holds = 
	var lock sync.Mutex
	acquired := 0
	blocked := 0
	for i := 0; i < holds; i++ {
		ok := lock.TryLock()
		if ok {
			acquired++
		} else {
			blocked++
		}
	}
	var status string
	if acquired == 0 {
		status = "idle"
	} else if blocked > 0 {
		status = "blocked"
	} else {
		status = "guarded"
	}
	fmt.Printf("holds=%d acquired=%d blocked=%d %s\n", holds, acquired, blocked, status)
}

package main

import (
	"fmt"
	"sync"
)

func main() {
	var holds = 
	var lock sync.Mutex
	acquired := 0
	blocked := 0
	for i := 0; i < holds; i++ {
		ok := lock.TryLock()
		if ok {
			acquired++
		} else {
			blocked++
		}
	}
	var status string
	if acquired == 0 {
		status = "idle"
	} else if blocked > 0 {
		status = "blocked"
	} else {
		status = "guarded"
	}
	fmt.Printf("holds=%d acquired=%d blocked=%d %s\n", holds, acquired, blocked, status)
}

nonblocking acquire A coordination report records nonblocking lock attempts. `sync.Mutex.TryLock` returns true when it takes the lock and false when the lock is already held, so it never blocks. Each acquired lock stays held, so a later attempt in the same run is reported as blocked and the status line summarizes whether the section stayed idle, guarded, or blocked a later acquire.