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Commit 246ee864 by Matt Sieren Committed by Dominic Hamon
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Disable iOS CPU Frequency readout (#335)

* Add macro definition for iOS Add an additional macro definition for iOS. iOS is defined as a Mac OSX invariant in the TargetConditionals include, thus we treat it as a subset of OSX within the defines. * Skip error for hw.cpufrequency on iOS hw.cpufrequency is not available on iOS devices. As there is no way to reliably retrieve the CPU frequency on iOS we are printing out a warning that we were unable to detect the CPU frequency and set it to 0. This only disables cpu frequency readouts on actual physical iOS devices. Running this code on the simulator still gives the cpu architecture of the host computer as the simulator passes down the sysctl calls to OSX.
parent 817bfee2
Showing with 12 additions and 3 deletions
src/internal_macros.h
......@@ -30,9 +30,13 @@
#elif defined(_WIN32)
#define BENCHMARK_OS_WINDOWS 1
#elif defined(__APPLE__)
// TODO(ericwf) This doesn't actually check that it is a Mac OSX system. Just
// that it is an apple system.
#define BENCHMARK_OS_MACOSX 1
#include "TargetConditionals.h"
#if defined(TARGET_OS_MAC)
#define BENCHMARK_OS_MACOSX 1
#if defined(TARGET_OS_IPHONE)
#define BENCHMARK_OS_IOS 1
#endif
#endif
#elif defined(__FreeBSD__)
#define BENCHMARK_OS_FREEBSD 1
#elif defined(__linux__)
......
src/sysinfo.cc
......@@ -295,8 +295,13 @@ void InitializeSystemInfo() {
(size == sizeof(cpu_freq))) {
cpuinfo_cycles_per_second = cpu_freq;
} else {
#if defined BENCHMARK_OS_IOS
fprintf(stderr, "CPU frequency cannot be detected. \n");
cpuinfo_cycles_per_second = 0;
#else
fprintf(stderr, "%s\n", strerror(errno));
std::exit(EXIT_FAILURE);
#endif
}
#else
// Generic cycles per second counter
......
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