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Completed
Push — master ( c752e6...86709a )
by cao
17:38
created

FileLock::lock()   B

↳ Parent: FileLock

Complexity

Conditions 5
Paths 6

Size

Total Lines 17
Code Lines 12

Duplication

Lines 0
Ratio 0 %

Code Coverage

Tests 0
CRAP Score 30

Importance

Changes 0
Metric Value
cc 5
eloc 12
nc 6
nop 2
dl 0
loc 17
ccs 0
cts 17
cp 0
crap 30
rs 8.8571
c 0
b 0
f 0
1 
<?php
2 
namespace PhpBoot\Lock;
3 

            


            
                                                                                                            
                            
            
                                    
            
            

                
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use PhpBoot\Utils\SafeFileWriter;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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class FileLock implements LockInterface

            


            
                                                                                                            
                            
            
                                    
            
            

                
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{

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    private $file;

            


            
                                                                        
                            
            
                                    
            
            

                
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    public function lock($key, $ttl)

            


            
                                                                        
                            
            
                                    
            
            

                
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    {

            


            
                                                                        
                            
            
                                    
            
            

                
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        if($this->locked){

            


            
                                                                        
                            
            
                                    
            
            

                
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            \PhpBoot\abort("relock $key");

            


            
                                                                        
                            
            
                                    
            
            

                
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        }

            


            
                                                                        
                            
            
                                    
            
            

                
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        $path = sys_get_temp_dir().'/lock_252a8fdc9b944af99a9bc53d2aea08f1_'.$key;

            


            
                                                                        
                            
            
                                    
            
            

                
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        $this->file = @fopen($path, 'a');

            


            
                                                                        
                            
            
                                    
            
            

                
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        if (!$this->file || !flock($this->file, LOCK_EX | LOCK_NB)) {

            


            
                                                                        
                            
            
                                    
            
            

                
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            if($this->file){

            


            
                                                                        
                            
            
                                    
            
            

                
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                fclose($this->file);

            


            
                                                                        
                            
            
                                    
            
            

                
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            }

            


            
                                                                        
                            
            
                                    
            
            

                
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            return false;

            


            
                                                                        
                            
            
                                    
            
            

                
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        } else {

            


            
                                                                        
                            
            
                                    
            
            

                
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            $this->locked = true;

            


            
                                                                        
                            
            
                                    
            
            

                
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        }

            


            
                                                                        
                            
            
                                    
            
            

                
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        return true;

            


            
                                                                        
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    public function unlock($key)

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    {

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->locked or \PhpBoot\abort("unlock unlocked $key");

            


                            

                    
                        
                    
                    
                    
                    
                                                                                                    
                        

                            
                            
0 ignored issues

                            –
                            show
                        


                        

                                                                                        




    

        
            Comprehensibility
            Best Practice
    
    
    
        introduced 
                            by 
            

        

        

            
        

        

            

                

                    
                
                
            


        

    

    

        
                        

                            
                                
                            
                        

                                        
Using logical operators such as or instead of || is generally not recommended.
                                                                                                                                                    

                    
                                            

                            

                            

                                
                                    
                                
                            


                            
PHP has two types of connecting operators (logical operators, and boolean operators):


 
Logical Operators
Boolean Operator

AND - meaning
and
&&

OR - meaning
or
||

The difference between these is the order in which they are executed. In most cases,
you would want to use a boolean operator like &&, or ||.


Let’s take a look at a few examples:


// Logical operators have lower precedence:
$f = false or true;

// is executed like this:
($f = false) or true;


// Boolean operators have higher precedence:
$f = false || true;

// is executed like this:
$f = (false || true);







Logical Operators are used for Control-Flow


One case where you explicitly want to use logical operators is for control-flow
such as this:


$x === 5
    or die('$x must be 5.');

// Instead of
if ($x !== 5) {
    die('$x must be 5.');
}





Since die introduces problems of its own, f.e. it makes our code hardly
testable, and prevents any kind of more sophisticated error handling; you probably
do not want to use this in real-world code. Unfortunately, logical operators
cannot be combined with throw at this point:


// The following is currently a parse error.
$x === 5
    or throw new RuntimeException('$x must be 5.');





These limitations lead to logical operators rarely being of use in current
PHP code.




                        

                                                    

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        flock($this->file, LOCK_UN);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        fclose($this->file);

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->file = null;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        $this->locked = false;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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        return true;

            


            
                                                                                                            
                            
            
                                    
            
            

                
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    }

            


            
                                                                                                            
                                                                
            
                                    
            
            

                
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    private $locked = false;

            


            
                                                        
            
                                    
            
            

                
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}