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block: explicitly acquire aiocontext in callbacks that need it

Browse source 
This covers both file descriptor callbacks and polling callbacks,
since they execute related code.

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170213135235.12274-14-pbonzini@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-02-13 14:52:30 +01:00 • committed by Stefan Hajnoczi
parent 2f47da5f7f
commit 9d45665448
11 changed files with 68 additions and 55 deletions
Download patch file Download diff file Expand all files Collapse all files

10
block/win32-aio.c
View file

@ -41,7 +41,7 @@ struct QEMUWin32AIOState {
HANDLE hIOCP;
EventNotifier e;
int count;
bool is_aio_context_attached;
AioContext *aio_ctx;
};
typedef struct QEMUWin32AIOCB {
@ -88,7 +88,9 @@ static void win32_aio_process_completion(QEMUWin32AIOState *s,
}
aio_context_acquire(s->aio_ctx);
waiocb->common.cb(waiocb->common.opaque, ret);
aio_context_release(s->aio_ctx);
qemu_aio_unref(waiocb);
}
@ -176,13 +178,13 @@ void win32_aio_detach_aio_context(QEMUWin32AIOState *aio,
AioContext *old_context)
{
aio_set_event_notifier(old_context, &aio->e, false, NULL, NULL);
aio->is_aio_context_attached = false;
aio->aio_ctx = NULL;
}
void win32_aio_attach_aio_context(QEMUWin32AIOState *aio,
AioContext *new_context)
{
aio->is_aio_context_attached = true;
aio->aio_ctx = new_context;
aio_set_event_notifier(new_context, &aio->e, false,
win32_aio_completion_cb, NULL);
}
@ -212,7 +214,7 @@ out_free_state:
void win32_aio_cleanup(QEMUWin32AIOState *aio)
{
assert(!aio->is_aio_context_attached);
assert(!aio->aio_ctx);
CloseHandle(aio->hIOCP);
event_notifier_cleanup(&aio->e);
g_free(aio);