1 //
2 //
3 // Copyright 2015 gRPC authors.
4 //
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 //
9 //     http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16 //
17 //
18 
19 #ifndef GRPC_SRC_CORE_LIB_IOMGR_BLOCK_ANNOTATE_H
20 #define GRPC_SRC_CORE_LIB_IOMGR_BLOCK_ANNOTATE_H
21 
22 void gpr_thd_start_blocking_region();
23 void gpr_thd_end_blocking_region();
24 
25 // These annotations identify the beginning and end of regions where
26 // the code may block for reasons other than synchronization functions.
27 // These include poll, epoll, and getaddrinfo.
28 
29 #ifdef GRPC_SCHEDULING_MARK_BLOCKING_REGION
30 #define GRPC_SCHEDULING_START_BLOCKING_REGION \
31   do {                                        \
32     gpr_thd_start_blocking_region();          \
33   } while (0)
34 #define GRPC_SCHEDULING_END_BLOCKING_REGION     \
35   do {                                          \
36     gpr_thd_end_blocking_region();              \
37     grpc_core::ExecCtx::Get()->InvalidateNow(); \
38   } while (0)
39 #define GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX \
40   do {                                                  \
41     gpr_thd_end_blocking_region();                      \
42   } while (0)
43 
44 #else
45 #define GRPC_SCHEDULING_START_BLOCKING_REGION \
46   do {                                        \
47   } while (0)
48 #define GRPC_SCHEDULING_END_BLOCKING_REGION     \
49   do {                                          \
50     grpc_core::ExecCtx::Get()->InvalidateNow(); \
51   } while (0)
52 #define GRPC_SCHEDULING_END_BLOCKING_REGION_NO_EXEC_CTX \
53   do {                                                  \
54   } while (0)
55 #endif
56 
57 #endif  // GRPC_SRC_CORE_LIB_IOMGR_BLOCK_ANNOTATE_H
58