/*
- * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * SPDX-License-Identifier: LGPL-2.1-only
*
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; version 2.1 of
- * the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <error.h>
#include <dlfcn.h>
#include <stdlib.h>
int (*lttng_get_cpu)(void);
+static
+void *getcpu_handle;
+
int lttng_ust_getcpu_override(int (*getcpu)(void))
{
CMM_STORE_SHARED(lttng_get_cpu, getcpu);
void lttng_ust_getcpu_init(void)
{
const char *libname;
- void *handle;
void (*libinit)(void);
- libname = lttng_secure_getenv("LTTNG_UST_GETCPU_PLUGIN");
+ if (getcpu_handle)
+ return;
+ libname = lttng_getenv("LTTNG_UST_GETCPU_PLUGIN");
if (!libname)
return;
- handle = dlopen(libname, RTLD_NOW);
- if (!handle) {
+ getcpu_handle = dlopen(libname, RTLD_NOW);
+ if (!getcpu_handle) {
PERROR("Cannot load LTTng UST getcpu override library %s",
libname);
return;
}
dlerror();
- libinit = (void (*)(void)) dlsym(handle,
+ libinit = (void (*)(void)) dlsym(getcpu_handle,
"lttng_ust_getcpu_plugin_init");
if (!libinit) {
PERROR("Cannot find LTTng UST getcpu override library %s initialization function lttng_ust_getcpu_plugin_init()",