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| author | Stefan Hajnoczi | 2020-09-23 12:56:46 +0200 |
|---|---|---|
| committer | Stefan Hajnoczi | 2020-09-23 17:07:44 +0200 |
| commit | d73415a315471ac0b127ed3fad45c8ec5d711de1 (patch) | |
| tree | bae20b3a39968fdfb4340b1a39b533333a8e6fd0 /include/block | |
| parent | tests: add test-fdmon-epoll (diff) | |
| download | qemu-d73415a315471ac0b127ed3fad45c8ec5d711de1.tar.gz qemu-d73415a315471ac0b127ed3fad45c8ec5d711de1.tar.xz qemu-d73415a315471ac0b127ed3fad45c8ec5d711de1.zip | |
qemu/atomic.h: rename atomic_ to qatomic_
clang's C11 atomic_fetch_*() functions only take a C11 atomic type
pointer argument. QEMU uses direct types (int, etc) and this causes a
compiler error when a QEMU code calls these functions in a source file
that also included <stdatomic.h> via a system header file:
$ CC=clang CXX=clang++ ./configure ... && make
../util/async.c:79:17: error: address argument to atomic operation must be a pointer to _Atomic type ('unsigned int *' invalid)
Avoid using atomic_*() names in QEMU's atomic.h since that namespace is
used by <stdatomic.h>. Prefix QEMU's APIs with 'q' so that atomic.h
and <stdatomic.h> can co-exist. I checked /usr/include on my machine and
searched GitHub for existing "qatomic_" users but there seem to be none.
This patch was generated using:
$ git grep -h -o '\<atomic\(64\)\?_[a-z0-9_]\+' include/qemu/atomic.h | \
sort -u >/tmp/changed_identifiers
$ for identifier in $(</tmp/changed_identifiers); do
sed -i "s%\<$identifier\>%q$identifier%g" \
$(git grep -I -l "\<$identifier\>")
done
I manually fixed line-wrap issues and misaligned rST tables.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20200923105646.47864-1-stefanha@redhat.com>
Diffstat (limited to 'include/block')
| -rw-r--r-- | include/block/aio-wait.h | 4 | ||||
| -rw-r--r-- | include/block/aio.h | 8 |
2 files changed, 6 insertions, 6 deletions
diff --git a/include/block/aio-wait.h b/include/block/aio-wait.h index 716d2639df..b39eefb38d 100644 --- a/include/block/aio-wait.h +++ b/include/block/aio-wait.h @@ -80,7 +80,7 @@ extern AioWait global_aio_wait; AioWait *wait_ = &global_aio_wait; \ AioContext *ctx_ = (ctx); \ /* Increment wait_->num_waiters before evaluating cond. */ \ - atomic_inc(&wait_->num_waiters); \ + qatomic_inc(&wait_->num_waiters); \ if (ctx_ && in_aio_context_home_thread(ctx_)) { \ while ((cond)) { \ aio_poll(ctx_, true); \ @@ -100,7 +100,7 @@ extern AioWait global_aio_wait; waited_ = true; \ } \ } \ - atomic_dec(&wait_->num_waiters); \ + qatomic_dec(&wait_->num_waiters); \ waited_; }) /** diff --git a/include/block/aio.h b/include/block/aio.h index b2f703fa3f..ec8c5af642 100644 --- a/include/block/aio.h +++ b/include/block/aio.h @@ -595,7 +595,7 @@ int64_t aio_compute_timeout(AioContext *ctx); */ static inline void aio_disable_external(AioContext *ctx) { - atomic_inc(&ctx->external_disable_cnt); + qatomic_inc(&ctx->external_disable_cnt); } /** @@ -608,7 +608,7 @@ static inline void aio_enable_external(AioContext *ctx) { int old; - old = atomic_fetch_dec(&ctx->external_disable_cnt); + old = qatomic_fetch_dec(&ctx->external_disable_cnt); assert(old > 0); if (old == 1) { /* Kick event loop so it re-arms file descriptors */ @@ -624,7 +624,7 @@ static inline void aio_enable_external(AioContext *ctx) */ static inline bool aio_external_disabled(AioContext *ctx) { - return atomic_read(&ctx->external_disable_cnt); + return qatomic_read(&ctx->external_disable_cnt); } /** @@ -637,7 +637,7 @@ static inline bool aio_external_disabled(AioContext *ctx) */ static inline bool aio_node_check(AioContext *ctx, bool is_external) { - return !is_external || !atomic_read(&ctx->external_disable_cnt); + return !is_external || !qatomic_read(&ctx->external_disable_cnt); } /** |