[FFmpeg-devel] [PATCH] Make av_get_random_seed not block when waiting for more entropy

Måns Rullgård mans
Tue Jun 29 20:11:24 CEST 2010

Martin Storsj? <martin at martin.st> writes:

> On Tue, 29 Jun 2010, M?ns Rullg?rd wrote:
>> This will still block if urandom isn't available.  How about this?
>> From cb60e983c550c2bdffc5fc07075336fb7c465fe9 Mon Sep 17 00:00:00 2001
>> From: Mans Rullgard <mans at mansr.com>
>> Date: Tue, 29 Jun 2010 14:22:51 +0100
>> Subject: [PATCH] Make av_get_random_seed() non-blocking
>> Attempt to read from /dev/urandom and /dev/random with O_NONBLOCK set.
>> If neither succeeds, proceed with fallbacks.
> In general, this looks like an even better alternative. Neither fcntl, 
> F_SETFL, F_GETFL nor O_NONBLOCK are available on windows, though, so they 
> need to be hidden within some kind of ifdef.

Cygwin should have them, mingw might not.

Do /dev/[u]random exist on cygwin/mingw?

M?ns Rullg?rd
mans at mansr.com

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