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 | |