mutex unlock check timeout to avoid double unlock.

lichao

2021-04-23 a04d4d01eb8e38b8ec5367114b5581bd64eee17e

 .vscode/tasks.json

@@ -3,32 +3,10 @@
        {
            "type": "cppbuild",
            "label": "C/C++: g++ build active file",
            "command": "/usr/bin/g++",
            "args": [
                "-g",
                "${file}",
                "-o",
                "${fileDirname}/${fileBasenameNoExtension}"
            ],
            "command": "ninja",
            "args": [],
            "options": {
                "cwd": "${workspaceFolder}"
            },
            "problemMatcher": [
                "$gcc"
            ],
            "group": {
                "kind": "build",
                "isDefault": true
            },
            "detail": "Task generated by Debugger."
        },
        {
            "type": "cppbuild",
            "label": "C/C++: g++ build active file",
            "command": "make",
            "args": ["build"],
            "options": {
                "cwd": "${workspaceFolder}"
                "cwd": "${workspaceFolder}/debug"
            },
            "problemMatcher": [
                "$gcc"
@@ -36,7 +14,6 @@
            "group": "build",
            "detail": "compiler: /usr/bin/g++"
        }
        
    ],
    "version": "2.0.0"
}