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| author | Rich Felker <dalias@aerifal.cx> | 2012-07-24 00:51:36 -0400 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2012-07-24 00:51:36 -0400 |
| commit | 07e62953c768f9f09485388c22ffaed98d11d676 (patch) | |
| tree | 5590ab7130d72e33cd5ef3be1659ea18367121e8 /src/unistd/getlogin_r.c | |
| parent | 5d26d5d15bf6c2fc8c0e58b76fb418b51e207af7 (diff) | |
| download | musl-07e62953c768f9f09485388c22ffaed98d11d676.tar.gz | |
retry on cas failures in sem_trywait
this seems counter-intuitive since sem_trywait is supposed to just try
once, not wait for the semaphore. however, the retry loop is not a
wait. instead, it's to handle the case where the value changes due to
a simultaneous post or wait from another thread while the semaphore
value remains positive. in such a case, it's absolutely wrong for
sem_trywait to fail with EAGAIN because the semaphore is not busy.
Diffstat (limited to 'src/unistd/getlogin_r.c')
0 files changed, 0 insertions, 0 deletions