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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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16
plugins/loader.c
View file

@ -19,6 +19,7 @@
#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/qht.h"
@ -367,15 +368,14 @@ void plugin_reset_uninstall(qemu_plugin_id_t id,
struct qemu_plugin_reset_data *data;
struct qemu_plugin_ctx *ctx;
qemu_rec_mutex_lock(&plugin.lock);
ctx = plugin_id_to_ctx_locked(id);
if (ctx->uninstalling || (reset && ctx->resetting)) {
qemu_rec_mutex_unlock(&plugin.lock);
return;
WITH_QEMU_LOCK_GUARD(&plugin.lock) {
ctx = plugin_id_to_ctx_locked(id);
if (ctx->uninstalling || (reset && ctx->resetting)) {
return;
}
ctx->resetting = reset;
ctx->uninstalling = !reset;
}
ctx->resetting = reset;
ctx->uninstalling = !reset;
qemu_rec_mutex_unlock(&plugin.lock);
data = g_new(struct qemu_plugin_reset_data, 1);
data->ctx = ctx;