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The new code is faster and reuses the previous state in case of
multiple calls.
The previous code could easily end up in near-infinite loops,
if the difference between two clock() calls never was larger than
1.
This makes fate-parseutils finish in finite time when run in wine,
if CryptGenRandom isn't available (which e.g. isn't available if
targeting Windows RT/metro).
Patch originally by Michael Niedermayer but with some modifications
by Martin Storsjö.
Signed-off-by: Martin Storsjö <martin@martin.st>
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Signed-off-by: Anton Khirnov <anton@khirnov.net>
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Signed-off-by: Martin Storsjö <martin@martin.st>
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unistd.h is used for open/read/close, but if this header does not
exist, there's probably no use in trying to open /dev/*random
at all.
Signed-off-by: Martin Storsjö <martin@martin.st>
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Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
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Use <> for system headers, add needed math.h, drop unnecessary avutil.h.
Signed-off-by: Mans Rullgard <mans@mansr.com>
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Signed-off-by: Mans Rullgard <mans@mansr.com>
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Originally committed as revision 24116 to svn://svn.ffmpeg.org/ffmpeg/trunk
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This is clearer than comparing against an unsigned number to force an unsigned
comparison that we need.
Originally committed as revision 24114 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 24102 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 23932 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 23931 to svn://svn.ffmpeg.org/ffmpeg/trunk
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If both /dev/random and /dev/urandom failed to return data, an
uninitialised value might be returned. Since most systems have a
non-blocking /dev/urandom or have /dev/random with similar properties,
the chance of blocking is minimal, and the alternative of returning
non-random data is worse.
Originally committed as revision 23930 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Attempt to read from /dev/urandom and /dev/random with O_NONBLOCK set.
If neither succeeds, proceed with fallbacks.
Originally committed as revision 23903 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Keep an old ff_ named function for binary compatibility until the
next major bump.
Originally committed as revision 23254 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 22451 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 22450 to svn://svn.ffmpeg.org/ffmpeg/trunk
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Originally committed as revision 17868 to svn://svn.ffmpeg.org/ffmpeg/trunk
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