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| author | kib <kib@FreeBSD.org> | 2011-12-06 11:24:03 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2011-12-06 11:24:03 +0000 |
| commit | 12e8232d4db8b80e5a4da1575bcfad518f1f867b (patch) | |
| tree | 4991fc8f0939a0565805b4cebbf3b5db11f617b8 /lib/libc/stdio/vdprintf.c | |
| parent | f8f306b32a4ee9cf17446f1997817dafecceb424 (diff) | |
| download | FreeBSD-src-12e8232d4db8b80e5a4da1575bcfad518f1f867b.zip FreeBSD-src-12e8232d4db8b80e5a4da1575bcfad518f1f867b.tar.gz | |
Most users of pipe(2) do not call fstat(2) on the returned pipe descriptors.
Optimize for the case, by lazily allocating the pipe inode number at the
fstat(2) time. If alloc_unr(9) returns failure, do not fail fstat(2), since
uses of inode numbers are even rare then fstat(2), but provide zero inode
forever. Note that alloc_unr() failure is unlikely due to total number
of pipes in the system limited by the number of file descriptors.
Based on the submission by: gianni
MFC after: 2 weeks
Diffstat (limited to 'lib/libc/stdio/vdprintf.c')
0 files changed, 0 insertions, 0 deletions
