From: Sergey Fedorov <sergey.fedorov@linaro.org>
To: qemu-devel@nongnu.org
Cc: patches@linaro.org, serge.fdrv@gmail.com,
"Alex Bennée" <alex.bennee@linaro.org>,
"MTTCG Devel" <mttcg@listserver.greensocs.com>,
"KONRAD Frédéric" <fred.konrad@greensocs.com>,
"Alvise Rigo" <a.rigo@virtualopensystems.com>,
"Emilio G. Cota" <cota@braap.org>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Richard Henderson" <rth@twiddle.net>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Sergey Fedorov" <sergey.fedorov@linaro.org>,
"Eric Blake" <eblake@redhat.com>
Subject: [Qemu-devel] [PATCH v3 01/12] atomic: introduce atomic_dec_fetch.
Date: Thu, 14 Jul 2016 00:00:11 +0300 [thread overview]
Message-ID: <1468443622-17368-2-git-send-email-sergey.fedorov@linaro.org> (raw)
In-Reply-To: <1468443622-17368-1-git-send-email-sergey.fedorov@linaro.org>
From: Alex Bennée <alex.bennee@linaro.org>
Useful for counting down.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
---
include/qemu/atomic.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/qemu/atomic.h b/include/qemu/atomic.h
index 7a590969b59f..8ac9ca7f457a 100644
--- a/include/qemu/atomic.h
+++ b/include/qemu/atomic.h
@@ -162,6 +162,8 @@
#define atomic_fetch_and(ptr, n) __atomic_fetch_and(ptr, n, __ATOMIC_SEQ_CST)
#define atomic_fetch_or(ptr, n) __atomic_fetch_or(ptr, n, __ATOMIC_SEQ_CST)
+#define atomic_dec_fetch(ptr) __atomic_sub_fetch(ptr, 1, __ATOMIC_SEQ_CST)
+
/* And even shorter names that return void. */
#define atomic_inc(ptr) ((void) __atomic_fetch_add(ptr, 1, __ATOMIC_SEQ_CST))
#define atomic_dec(ptr) ((void) __atomic_fetch_sub(ptr, 1, __ATOMIC_SEQ_CST))
@@ -357,6 +359,8 @@
#define atomic_fetch_or __sync_fetch_and_or
#define atomic_cmpxchg __sync_val_compare_and_swap
+#define atomic_dec_fetch(ptr) __sync_sub_and_fetch(ptr, 1)
+
/* And even shorter names that return void. */
#define atomic_inc(ptr) ((void) __sync_fetch_and_add(ptr, 1))
#define atomic_dec(ptr) ((void) __sync_fetch_and_add(ptr, -1))
--
1.9.1
next prev parent reply other threads:[~2016-07-13 21:00 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-07-13 21:00 [Qemu-devel] [PATCH v3 00/12] cpu-exec: Safe work in quiescent state Sergey Fedorov
2016-07-13 21:00 ` Sergey Fedorov [this message]
2016-07-13 21:00 ` [PATCH v3 02/12] cpus: pass CPUState to run_on_cpu helpers Sergey Fedorov
2016-07-13 21:00 ` [Qemu-devel] " Sergey Fedorov
2016-07-13 21:00 ` [Qemu-devel] [PATCH v3 03/12] cpus: Move common code out of {async_, }run_on_cpu() Sergey Fedorov
2016-07-13 21:00 ` [Qemu-devel] [PATCH v3 04/12] cpus: Wrap mutex used to protect CPU work Sergey Fedorov
2016-07-13 21:00 ` [Qemu-devel] [PATCH v3 05/12] cpus: Rename flush_queued_work() Sergey Fedorov
2016-07-13 21:00 ` [Qemu-devel] [PATCH v3 06/12] linux-user: Use QemuMutex and QemuCond Sergey Fedorov
2016-07-13 21:00 ` [Qemu-devel] [PATCH v3 07/12] linux-user: Rework exclusive operation mechanism Sergey Fedorov
2016-07-13 21:00 ` [Qemu-devel] [PATCH v3 08/12] linux-user: Add qemu_cpu_is_self() and qemu_cpu_kick() Sergey Fedorov
2016-07-13 21:00 ` [Qemu-devel] [PATCH v3 09/12] linux-user: Support CPU work queue Sergey Fedorov
2016-07-13 21:00 ` [Qemu-devel] [PATCH v3 10/12] bsd-user: " Sergey Fedorov
2016-07-13 21:00 ` [Qemu-devel] [PATCH v3 11/12] cpu-exec-common: Introduce async_safe_run_on_cpu() Sergey Fedorov
2016-07-13 21:00 ` [Qemu-devel] [PATCH v3 12/12] tcg: Make tb_flush() thread safe Sergey Fedorov
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