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util/async: replace __thread with QEMU TLS macros 

QEMU TLS macros must be used to make TLS variables safe with coroutines.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20220222140150.27240-3-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2022-02-22 14:01:48 +00:00 committed by Kevin Wolf
parent 7d29c341c9
commit 47b7446456
1 changed files with 7 additions and 5 deletions
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12
util/async.c
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@ -32,6 +32,7 @@
#include "qemu/rcu_queue.h"
#include "block/raw-aio.h"
#include "qemu/coroutine_int.h"
#include "qemu/coroutine-tls.h"
#include "trace.h"
/***********************************************************/
@ -675,12 +676,13 @@ void aio_context_release(AioContext *ctx)
qemu_rec_mutex_unlock(&ctx->lock);
}
static __thread AioContext *my_aiocontext;
QEMU_DEFINE_STATIC_CO_TLS(AioContext *, my_aiocontext)
AioContext *qemu_get_current_aio_context(void)
{
if (my_aiocontext) {
return my_aiocontext;
AioContext *ctx = get_my_aiocontext();
if (ctx) {
return ctx;
}
if (qemu_mutex_iothread_locked()) {
/* Possibly in a vCPU thread. */
@ -691,6 +693,6 @@ AioContext *qemu_get_current_aio_context(void)
void qemu_set_current_aio_context(AioContext *ctx)
{
assert(!my_aiocontext);
my_aiocontext = ctx;
assert(!get_my_aiocontext());
set_my_aiocontext(ctx);
}