40f562f9749668f7f1ebbcea4b6e1d0513ca22c0
[lttng-tools.git] / src / common / compat / tid.h
1 /*
2 * Copyright 2012 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
3 *
4 * gettid compatibility layer.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25 #ifndef LTTNG_TID_H
26 #define LTTNG_TID_H
27
28 #ifdef __linux__
29 #include <syscall.h>
30 #endif
31
32 #if defined(_syscall0)
33 _syscall0(pid_t, gettid)
34 #elif defined(__NR_gettid)
35 #include <unistd.h>
36 static inline pid_t gettid(void)
37 {
38 return syscall(__NR_gettid);
39 }
40 #else
41 #include <sys/types.h>
42 #include <unistd.h>
43
44 /* Fall-back on getpid for tid if not available. */
45 static inline pid_t gettid(void)
46 {
47 return getpid();
48 }
49 #endif
50
51 #endif /* LTTNG_TID_H */
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