Wikipedia

Time-of-check to time-of-use: Difference between revisions

Browse history interactively
← Previous editNext edit →
Content deleted Content added
VisualWikitext
Alinowe (talk | contribs)
201 edits
EAFP doesn't have to be signaled by exceptions, it can be signaled just fine by error codes. It does assume the check is included in the "protected" API, but that's a design issue.
Line 127:
== Preventing TOCTOU ==
 
Despite conceptual simplicity, TOCTOU race conditions are difficult to avoid and eliminate. One general technique is to use [[exceptionerror handling]] instead of pre-checking, under the philosophy of EAFP – "It is easier to ask for forgiveness than permission" rather than LBYL – "look before you leap" – in this case there is no check, and failure of assumptions to hold are detectedsignaled atby usean time,error by anbeing exceptionreturned.<ref>{{cite book
| last=Martelli
| first=Alex
Retrieved from "https://en.wikipedia.org/wiki/Time-of-check_to_time-of-use"