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co-shared-resource: protect with a mutex

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co-shared-resource is currently not thread-safe, as also reported
in co-shared-resource.h. Add a QemuMutex because co_try_get_from_shres
can also be invoked from non-coroutine context.

Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20210614081130.22134-6-eesposit@redhat.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
This commit is contained in:
Emanuele Giuseppe Esposito 2021-06-14 10:11:30 +02:00 • committed by Vladimir Sementsov-Ogievskiy
parent a7b4f8fc09
commit 55fa54a789
2 changed files with 20 additions and 8 deletions
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4
include/qemu/co-shared-resource.h
View file

@ -26,15 +26,13 @@
#ifndef QEMU_CO_SHARED_RESOURCE_H
#define QEMU_CO_SHARED_RESOURCE_H
/* Accesses to co-shared-resource API are thread-safe */
typedef struct SharedResource SharedResource;
/*
* Create SharedResource structure
*
* @total: total amount of some resource to be shared between clients
*
* Note: this API is not thread-safe.
*/
SharedResource *shres_create(uint64_t total);