From: "Alex Bennée" <alex.bennee@linaro.org>
To: qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org, "Alex Bennée" <alex.bennee@linaro.org>,
pbonzini@redhat.com
Subject: [PATCH] qemu/atomic.h: add #ifdef guards for stdatomic.h
Date: Thu, 26 Mar 2020 17:01:21 +0000 [thread overview]
Message-ID: <20200326170121.13045-1-alex.bennee@linaro.org> (raw)
Deep inside the FreeBSD netmap headers we end up including stdatomic.h
which clashes with qemu's atomic functions which are modelled along
the C11 standard. To avoid a massive rename lets just ifdef around the
problem.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
---
include/qemu/atomic.h | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/include/qemu/atomic.h b/include/qemu/atomic.h
index f9cd24c8994..ff72db51154 100644
--- a/include/qemu/atomic.h
+++ b/include/qemu/atomic.h
@@ -208,11 +208,14 @@
/* Provide shorter names for GCC atomic builtins, return old value */
#define atomic_fetch_inc(ptr) __atomic_fetch_add(ptr, 1, __ATOMIC_SEQ_CST)
#define atomic_fetch_dec(ptr) __atomic_fetch_sub(ptr, 1, __ATOMIC_SEQ_CST)
+
+#ifndef atomic_fetch_add
#define atomic_fetch_add(ptr, n) __atomic_fetch_add(ptr, n, __ATOMIC_SEQ_CST)
#define atomic_fetch_sub(ptr, n) __atomic_fetch_sub(ptr, n, __ATOMIC_SEQ_CST)
#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_fetch_xor(ptr, n) __atomic_fetch_xor(ptr, n, __ATOMIC_SEQ_CST)
+#endif
#define atomic_inc_fetch(ptr) __atomic_add_fetch(ptr, 1, __ATOMIC_SEQ_CST)
#define atomic_dec_fetch(ptr) __atomic_sub_fetch(ptr, 1, __ATOMIC_SEQ_CST)
@@ -392,11 +395,14 @@
/* Provide shorter names for GCC atomic builtins. */
#define atomic_fetch_inc(ptr) __sync_fetch_and_add(ptr, 1)
#define atomic_fetch_dec(ptr) __sync_fetch_and_add(ptr, -1)
+
+#ifndef atomic_fetch_add
#define atomic_fetch_add(ptr, n) __sync_fetch_and_add(ptr, n)
#define atomic_fetch_sub(ptr, n) __sync_fetch_and_sub(ptr, n)
#define atomic_fetch_and(ptr, n) __sync_fetch_and_and(ptr, n)
#define atomic_fetch_or(ptr, n) __sync_fetch_and_or(ptr, n)
#define atomic_fetch_xor(ptr, n) __sync_fetch_and_xor(ptr, n)
+#endif
#define atomic_inc_fetch(ptr) __sync_add_and_fetch(ptr, 1)
#define atomic_dec_fetch(ptr) __sync_add_and_fetch(ptr, -1)
--
2.20.1
next reply other threads:[~2020-03-26 17:02 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-26 17:01 Alex Bennée [this message]
2020-03-26 17:14 ` [PATCH] qemu/atomic.h: add #ifdef guards for stdatomic.h Peter Maydell
2020-03-26 17:32 ` Alex Bennée
2020-03-26 18:05 ` Paolo Bonzini
2020-03-26 20:19 ` Peter Maydell
2020-03-27 9:51 ` Alex Bennée
2020-03-27 13:35 ` Richard Henderson
2020-03-26 19:58 ` Richard Henderson
2020-03-26 20:05 ` Paolo Bonzini
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