util: expose qemu_thread_set_name

The ability to set the thread name needs to be used in a number
of places, so expose the current impls as public methods.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Dr. David Alan Gilbert <dave@treblig.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

include/qemu/thread.h

@@ -215,6 +215,7 @@ void *qemu_thread_join(QemuThread *thread);
 void qemu_thread_get_self(QemuThread *thread);
 bool qemu_thread_is_self(QemuThread *thread);
 G_NORETURN void qemu_thread_exit(void *retval);
+void qemu_thread_set_name(const char *name);
 
 struct Notifier;
 /**

util/qemu-thread-posix.c

@@ -329,6 +329,21 @@ static void qemu_thread_atexit_notify(void *arg)
     notifier_list_notify(&thread_exit, NULL);
 }
 
+void qemu_thread_set_name(const char *name)
+{
+    /*
+     * Attempt to set the thread name; note that this is for debug, so
+     * we're not going to fail if we can't set it.
+     */
+# if defined(CONFIG_PTHREAD_SETNAME_NP_W_TID)
+    pthread_setname_np(pthread_self(), name);
+# elif defined(CONFIG_PTHREAD_SETNAME_NP_WO_TID)
+    pthread_setname_np(name);
+# elif defined(CONFIG_PTHREAD_SET_NAME_NP)
+    pthread_set_name_np(pthread_self(), name);
+# endif
+}
+
 typedef struct {
     void *(*start_routine)(void *);
     void *arg;
@@ -342,17 +357,8 @@ static void *qemu_thread_start(void *args)
     void *arg = qemu_thread_args->arg;
     void *r;
 
-    /* Attempt to set the threads name; note that this is for debug, so
-     * we're not going to fail if we can't set it.
-     */
     if (qemu_thread_args->name) {
-# if defined(CONFIG_PTHREAD_SETNAME_NP_W_TID)
-        pthread_setname_np(pthread_self(), qemu_thread_args->name);
-# elif defined(CONFIG_PTHREAD_SETNAME_NP_WO_TID)
-        pthread_setname_np(qemu_thread_args->name);
-# elif defined(CONFIG_PTHREAD_SET_NAME_NP)
-        pthread_set_name_np(pthread_self(), qemu_thread_args->name);
-# endif
+        qemu_thread_set_name(qemu_thread_args->name);
     }
     QEMU_TSAN_ANNOTATE_THREAD_NAME(qemu_thread_args->name);
     g_free(qemu_thread_args->name);

util/qemu-thread-win32.c

@@ -22,8 +22,6 @@ typedef HRESULT (WINAPI *pSetThreadDescription) (HANDLE hThread,
 static pSetThreadDescription SetThreadDescriptionFunc;
 static HMODULE kernel32_module;
 
-static void set_thread_description(const char *name);
-
 static bool load_set_thread_description(void)
 {
     static gsize _init_once = 0;
@@ -270,7 +268,7 @@ static unsigned __stdcall win32_start_routine(void *arg)
     void *thread_arg = data->arg;
 
     if (data->name) {
-        set_thread_description(data->name);
+        qemu_thread_set_name(data->name);
         g_clear_pointer(&data->name, g_free);
     }
     qemu_thread_data = data;
@@ -323,7 +321,7 @@ void *qemu_thread_join(QemuThread *thread)
     return ret;
 }
 
-static void set_thread_description(const char *name)
+void qemu_thread_set_name(const char *name)
 {
     g_autofree wchar_t *namew = NULL;