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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_SUPPORT_CPU_H
20 #define GRPC_SUPPORT_CPU_H
21 
22 #include <grpc/support/port_platform.h>
23 
24 #ifdef __cplusplus
25 extern "C" {
26 #endif
27 
28 /** Interface providing CPU information for currently running system */
29 
30 /** Return the number of CPU cores on the current system. Will return 0 if
31    the information is not available. */
32 GPRAPI unsigned gpr_cpu_num_cores(void);
33 
34 /** Return the CPU on which the current thread is executing; N.B. This should
35    be considered advisory only - it is possible that the thread is switched
36    to a different CPU at any time. Returns a value in range
37    [0, gpr_cpu_num_cores() - 1] */
38 GPRAPI unsigned gpr_cpu_current_cpu(void);
39 
40 #ifdef __cplusplus
41 }  // extern "C"
42 #endif
43 
44 #endif /* GRPC_SUPPORT_CPU_H */
45