X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-clock.c;h=93a5075d8a2b0db1693246fa44ac09df298c4ee8;hb=f574bfb4d81b26d3cfc0243868d138e33470a950;hp=e8391e6dd49f87e0efed2e99b3569c150bca8636;hpb=730bf2af85afbd5557adac5e3283f3ad59e90194;p=lttng-ust.git

diff --git a/liblttng-ust/lttng-clock.c b/liblttng-ust/lttng-clock.c
index e8391e6d..93a5075d 100644
--- a/liblttng-ust/lttng-clock.c
+++ b/liblttng-ust/lttng-clock.c
@@ -1,25 +1,14 @@
 /*
- * 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>
+#include <stdint.h>
 #include <usterr-signal-safe.h>
 #include <lttng/ust-clock.h>
 #include <urcu/system.h>
@@ -33,6 +22,9 @@ struct lttng_trace_clock *lttng_trace_clock;
 static
 struct lttng_trace_clock user_tc;
 
+static
+void *clock_handle;
+
 int lttng_ust_trace_clock_set_read64_cb(uint64_t (*read64)(void))
 {
 	if (CMM_LOAD_SHARED(lttng_trace_clock))
@@ -94,21 +86,21 @@ int lttng_ust_enable_trace_clock_override(void)
 void lttng_ust_clock_init(void)
 {
 	const char *libname;
-	void *handle;
 	void (*libinit)(void);
 
-
-	libname = lttng_secure_getenv("LTTNG_UST_CLOCK_PLUGIN");
+	if (clock_handle)
+		return;
+	libname = lttng_ust_getenv("LTTNG_UST_CLOCK_PLUGIN");
 	if (!libname)
 		return;
-	handle = dlopen(libname, RTLD_NOW);
-	if (!handle) {
+	clock_handle = dlopen(libname, RTLD_NOW);
+	if (!clock_handle) {
 		PERROR("Cannot load LTTng UST clock override library %s",
 			libname);
 		return;
 	}
 	dlerror();
-	libinit = (void (*)(void)) dlsym(handle,
+	libinit = (void (*)(void)) dlsym(clock_handle,
 		"lttng_ust_clock_plugin_init");
 	if (!libinit) {
 		PERROR("Cannot find LTTng UST clock override library %s initialization function lttng_ust_clock_plugin_init()",