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lockable: add QemuRecMutex support

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The polymorphic locking macros don't support QemuRecMutex yet.  Add it
so that lock guards can be used with QemuRecMutex.

Convert TCG plugins functions that benefit from these macros.  Manual
qemu_rec_mutex_lock/unlock() callers are left unmodified in cases where
clarity would not improve by switching to the macros.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2020-03-16 11:09:57 +00:00 • committed by Paolo Bonzini
parent 3284c3ddc4
commit ac90871cf8
3 changed files with 15 additions and 14 deletions
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7
plugins/core.c
View file

@ -15,6 +15,7 @@
#include "qemu/error-report.h"
#include "qemu/config-file.h"
#include "qapi/error.h"
#include "qemu/lockable.h"
#include "qemu/option.h"
#include "qemu/rcu_queue.h"
#include "qemu/xxhash.h"
@ -150,11 +151,11 @@ do_plugin_register_cb(qemu_plugin_id_t id, enum qemu_plugin_event ev,
{
struct qemu_plugin_ctx *ctx;
qemu_rec_mutex_lock(&plugin.lock);
QEMU_LOCK_GUARD(&plugin.lock);
ctx = plugin_id_to_ctx_locked(id);
/* if the plugin is on its way out, ignore this request */
if (unlikely(ctx->uninstalling)) {
goto out_unlock;
return;
}
if (func) {
struct qemu_plugin_cb *cb = ctx->callbacks[ev];
@ -178,8 +179,6 @@ do_plugin_register_cb(qemu_plugin_id_t id, enum qemu_plugin_event ev,
} else {
plugin_unregister_cb__locked(ctx, ev);
}
out_unlock:
qemu_rec_mutex_unlock(&plugin.lock);
}
void plugin_register_cb(qemu_plugin_id_t id, enum qemu_plugin_event ev,