cpu_iphone.cc
Go to the documentation of this file.
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 #include <grpc/support/port_platform.h>
20 
21 #include <grpc/support/cpu.h>
22 
23 #ifdef GPR_CPU_IPHONE
24 
25 #include <sys/sysctl.h>
26 
27 unsigned gpr_cpu_num_cores(void) {
28  size_t len;
29  unsigned int ncpu;
30  len = sizeof(ncpu);
31  sysctlbyname("hw.ncpu", &ncpu, &len, NULL, 0);
32 
33  return ncpu;
34 }
35 
36 /* Most code that's using this is using it to shard across work queues. So
37  unless profiling shows it's a problem or there appears a way to detect the
38  currently running CPU core, let's have it shard the default way.
39  Note that the interface in cpu.h lets gpr_cpu_num_cores return 0, but doing
40  it makes it impossible for gpr_cpu_current_cpu to satisfy its stated range,
41  and some code might be relying on it. */
42 unsigned gpr_cpu_current_cpu(void) { return 0; }
43 
44 #endif /* GPR_CPU_IPHONE */
gpr_cpu_num_cores
GPRAPI unsigned gpr_cpu_num_cores(void)
gpr_cpu_current_cpu
GPRAPI unsigned gpr_cpu_current_cpu(void)
cpu.h
len
int len
Definition: abseil-cpp/absl/base/internal/low_level_alloc_test.cc:46
port_platform.h

grpc
Author(s):
autogenerated on Thu Mar 13 2025 02:58:59