| commit | ea753d81e8b085d679f13e4a6023e003e9854d51 | [log] [tgz] |
|---|---|---|
| author | Paolo Bonzini <pbonzini@redhat.com> | Wed Sep 25 14:20:57 2013 +0800 |
| committer | Paolo Bonzini <pbonzini@redhat.com> | Thu Oct 17 17:24:15 2013 +0200 |
| tree | 072bf3d6c7a3bd8726fe767cbf90470b7172ebce | |
| parent | c46860ea53854a96b11af0d6e23b623ce199e95e [diff] |
seqlock: introduce read-write seqlock
Seqlock implementation for QEMU. Usage idiom
reader:
do {
start = seqlock_read_begin(&sl);
...
} while (seqlock_read_retry(&sl, start));
writer:
seqlock_write_lock(&sl);
...
seqlock_write_unlock(&sl);
initialization:
seqlock_init(QemuSeqLock *sl, QemuMutex *mutex)
mutex could be NULL if the caller will provide its own protection
for concurrent write sides (typically using the BQL).
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>