On MacOSX, in a C ++ program, what guarantees can I get in the IO file

Question

I am on MacOSX. I am writing a multi-threaded program. One thread registers. At any time, a failure may occur in streams without registration.

What agreements should be accepted in the registrar / what guarantees do I have?

I would prefer a solution, even if I crash during the recording, the previous recordings still go to disk, and when I read the magazine, I can understand, “ah, I wrote 100 full quotes, then I broke 101st” .

Thank!

Answer 1

I program on Linux, not MacOSX, but it's probably there too.

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Answer 2

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Mac OS X, " Apple" (ASL). API, syslog .