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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2014-03-03 11:30:03 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2014-03-13 14:42:21 +0100 |
| commit | 2da61b671eb89fcaa306738f44eed472977d6587 (patch) | |
| tree | 61673e48ab889a6ea113ff4d2be2d48d7108d1a1 /tests/Makefile | |
| parent | 11f590b1a242492a0108da42f40f0e2b20f0a778 (diff) | |
| download | qemu-2da61b671eb89fcaa306738f44eed472977d6587.tar.gz | |
rfifolock: add recursive FIFO lock
QemuMutex does not guarantee fairness and cannot be acquired
recursively:
Fairness means each locker gets a turn and the scheduler cannot cause
starvation.
Recursive locking is useful for composition, it allows a sequence of
locking operations to be invoked atomically by acquiring the lock around
them.
This patch adds RFifoLock, a recursive lock that guarantees FIFO order.
Its first user is added in the next patch.
RFifoLock has one additional feature: it can be initialized with an
optional contention callback. The callback is invoked whenever a thread
must wait for the lock. For example, it can be used to poke the current
owner so that they release the lock soon.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'tests/Makefile')
| -rw-r--r-- | tests/Makefile | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/tests/Makefile b/tests/Makefile index e146f81d44..190e596689 100644 --- a/tests/Makefile +++ b/tests/Makefile @@ -35,6 +35,7 @@ check-unit-y += tests/test-visitor-serialization$(EXESUF) check-unit-y += tests/test-iov$(EXESUF) gcov-files-test-iov-y = util/iov.c check-unit-y += tests/test-aio$(EXESUF) +check-unit-y += tests/test-rfifolock$(EXESUF) check-unit-y += tests/test-throttle$(EXESUF) gcov-files-test-aio-$(CONFIG_WIN32) = aio-win32.c gcov-files-test-aio-$(CONFIG_POSIX) = aio-posix.c @@ -176,6 +177,7 @@ tests/check-qjson$(EXESUF): tests/check-qjson.o libqemuutil.a libqemustub.a tests/check-qom-interface$(EXESUF): tests/check-qom-interface.o $(qom-core-obj) libqemuutil.a libqemustub.a tests/test-coroutine$(EXESUF): tests/test-coroutine.o $(block-obj-y) libqemuutil.a libqemustub.a tests/test-aio$(EXESUF): tests/test-aio.o $(block-obj-y) libqemuutil.a libqemustub.a +tests/test-rfifolock$(EXESUF): tests/test-rfifolock.o libqemuutil.a libqemustub.a tests/test-throttle$(EXESUF): tests/test-throttle.o $(block-obj-y) libqemuutil.a libqemustub.a tests/test-thread-pool$(EXESUF): tests/test-thread-pool.o $(block-obj-y) libqemuutil.a libqemustub.a tests/test-iov$(EXESUF): tests/test-iov.o libqemuutil.a |