2 ms·
No. CreateFile returns INVALID_HANDLE_VALUE which is -1. Compare this to CreateSemaphore which also returns a HANDLE, but returns NULL[1] on failure. Returning
by cjensen 13y ago
No. CreateFile returns INVALID_HANDLE_VALUE which is -1. Compare this to CreateSemaphore which also returns a HANDLE, but returns NULL[1] on failure.
Returning int(0) as a failure is often done in C if the return value is a boolean since C lacks a true boolean type.
[1] NULL should never be used in actual code because it is ambiguous.
- userbinator 13y agoThose are functions that return more possible success values than failure values. The three common conventions seem to be: Nonzero: error code, zero: success Nonzero: one of many possible success values, zero: error (e.g. malloc()) Negative: error code, positive: one of many possible success values And each has its tradeoffs.