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| Does what it says, essentially. I mainly use this for code generation, so I don't know how practical it is for realtime purposes. Either way, it's been pretty handy for me. |
SuperStrict
Type TTagGenerator
?Threaded
Field _tags_mutex:TMutex
?
Field _tagmap:TMap
Field _characters:String = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
Field _timeout:Int = 2147483647
Field _length:Int = 8
Field _tagbuff:Short Ptr
Method New()
?Threaded
_tags_mutex = TMutex.Create()
?
_tagmap = New TMap
SetTagLength(_length)
End Method
Method Delete()
?Threaded
_tags_mutex.Close()
?
If _tagbuff Then
MemFree(_tagbuff)
EndIf
End Method
Method SetTagLength(l:Int)
?Threaded
_tags_mutex.Lock
?
Assert 0 < l Else "Length less than 1"
_length = l
If _tagbuff Then
MemFree(_tagbuff)
EndIf
_tagbuff = Short Ptr(MemAlloc(_length*2))
?Threaded
_tags_mutex.Unlock
?
End Method
Method SetCharacterString(chars$)
?Threaded
_tags_mutex.Lock
?
Assert chars Else "Empty character string"
_characters = chars
?Threaded
_tags_mutex.Unlock
?
End Method
Method SetTimeout(timeout:Int)
?Threaded
_tags_mutex.Lock
?
Assert timeout < 0 Else "Timeout less than 0"
_timeout = timeout
?Threaded
_tags_mutex.Unlock
?
End Method
Method NextTag$() NoDebug
?Threaded
_tags_mutex.Lock
?
' generate a short tag to follow the method name, just to reduce the chance of conflicts
Local tag:String
Local ticks:Int = 0
Local tagexists:Int = False
Repeat
For Local i:Int = 0 Until _length
_tagbuff[i] = _characters[Rand(0, _characters.Length-1)]
Next
tag = String.FromShorts(_tagbuff, _length)
tagExists = _tagmap.Contains(tag)
ticks :+ 1
Until Not tagexists Or (0 <= _timeout And _timeout <= ticks)
Local timedOut:Int = (tagExists And _timeout <= ticks)
If Not timedOut Then
_tagmap.Insert(tag, tag)
EndIf
?Threaded
_tags_mutex.Unlock
?
Assert Not timedOut Else "Unable to create unique tag"
Return tag
End Method
Method RemoveTag(tag$)
?Threaded
_tags_mutex.Lock
?
_tagmap.Remove(tag)
?Threaded
_tags_mutex.Unlock
?
End Method
Method ClearTags()
?Threaded
_tags_mutex.Lock
?
_tagmap.Clear
?Threaded
_tags_mutex.Unlock
?
End Method
End Type |
Comments |
Shouldn't " Assert _characters Else "Empty character string" " be "Assert chars Else "Empty character string"
" because you are testing the new batch of characters? You did it 'correctly' for the timeout... just wondering.
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Probably? I've changed it, hopefully it doesn't break anything.
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