[Lazarus] thread safe

[Mattias Gaertner]

 Hans-Peter Diettrich <DrDiettrich1 at aol.com> hat am 27. Juni 2011 um 16:58
geschrieben:

 > Martin schrieb:
 >
 > > See my example about memory alloc in my other mail. It shows, that a
 > > piece of code (and it's ability to be "safely invoked ") does not solely
 > > depend on the parameters passed, but also on (selected parts of) the
 > > state of the application or system.
 >
 > What when some code does not return anything, *and* cannot work at all
 > due to some problem (out-of-memory, file deleted, object destroyed...)?
 >
 > When e.g. a file search cannot proceed due to missing access rights? It
 > cannot return an boolean value (succ/fail), because it's simply unknown
 > whether the file exists.
 >
 > When in case of an unexpected error the called procedure throws an
 > exception? Can this procedure *ever* be "safely invoked", when it may
 > return to some other place in code (exception handler)? 
Yes, if raising an IO exception is a valid output. 

 
Mattias
 
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