cleanup: use <sys/syscall.h>

[lttng-ust.git] / include / lttng / ust-tid.h

diff --git a/include/lttng/ust-tid.h b/include/lttng/ust-tid.h
index c6819f25a734d860c1e9cfcc603700b94871ff30..f92fb4198873f1b55e15b49ee5e7e7a883ed48c6 100644 (file)
--- a/include/lttng/ust-tid.h
+++ b/include/lttng/ust-tid.h
@@ -8,37 +8,48 @@
  *
  * gettid compatibility layer.
  *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
  *
- * Permission is hereby granted to use or copy this program
- * for any purpose,  provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
  */
 
 #ifdef __linux__
-#include <syscall.h>
+#include <sys/syscall.h>
 #endif
 
-#if defined(_syscall0)
-_syscall0(pid_t, gettid)
-#elif defined(__NR_gettid)
+#if defined(__NR_gettid)
+
 #include <unistd.h>
-static inline pid_t gettid(void)
+static inline pid_t lttng_gettid(void)
 {
        return syscall(__NR_gettid);
 }
+
 #else
+
 #include <sys/types.h>
 #include <unistd.h>
 
-#warning "use pid as tid"
-static inline pid_t gettid(void)
+/* Fall-back on getpid for tid if not available. */
+static inline pid_t lttng_gettid(void)
 {
        return getpid();
 }
+
 #endif
 
 #endif /* _LTTNG_UST_TID_H */