1/*
2 * Copyright 2016-present Facebook, Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#pragma once
18
19#if defined(__ELF__) && (defined(__x86_64__) || defined(__i386__)) && \
20 !FOLLY_DISABLE_SDT
21
22#include <folly/tracing/StaticTracepoint-ELFx86.h>
23
24#define FOLLY_SDT(provider, name, ...) \
25 FOLLY_SDT_PROBE_N( \
26 provider, name, 0, FOLLY_SDT_NARG(0, ##__VA_ARGS__), ##__VA_ARGS__)
27// Use FOLLY_SDT_DEFINE_SEMAPHORE(provider, name) to define the semaphore
28// as global variable before using the FOLLY_SDT_WITH_SEMAPHORE macro
29#define FOLLY_SDT_WITH_SEMAPHORE(provider, name, ...) \
30 FOLLY_SDT_PROBE_N( \
31 provider, name, 1, FOLLY_SDT_NARG(0, ##__VA_ARGS__), ##__VA_ARGS__)
32#define FOLLY_SDT_IS_ENABLED(provider, name) \
33 (FOLLY_SDT_SEMAPHORE(provider, name) > 0)
34
35#else
36
37#define FOLLY_SDT(provider, name, ...) \
38 do { \
39 } while (0)
40#define FOLLY_SDT_WITH_SEMAPHORE(provider, name, ...) \
41 do { \
42 } while (0)
43#define FOLLY_SDT_IS_ENABLED(provider, name) (false)
44#define FOLLY_SDT_DEFINE_SEMAPHORE(provider, name)
45#define FOLLY_SDT_DECLARE_SEMAPHORE(provider, name)
46#endif
47