Compat layer for gettid

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

diff --git a/include/lttng/ust-tid.h b/include/lttng/ust-tid.h
new file mode 100644 (file)
index 0000000..c6819f2
--- /dev/null
+++ b/include/lttng/ust-tid.h
@@ -0,0 +1,44 @@
+#ifndef _LTTNG_UST_TID_H
+#define _LTTNG_UST_TID_H
+
+/*
+ * lttng/ust-tid.h
+ *
+ * Copyright 2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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 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.
+ */
+
+#ifdef __linux__
+#include <syscall.h>
+#endif
+
+#if defined(_syscall0)
+_syscall0(pid_t, gettid)
+#elif defined(__NR_gettid)
+#include <unistd.h>
+static inline pid_t 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)
+{
+       return getpid();
+}
+#endif
+
+#endif /* _LTTNG_UST_TID_H */