mirror of
https://github.com/lucannez64/darling-lol.git
synced 2026-10-26 19:47:42 +00:00
39 lines
1.7 KiB
C
39 lines
1.7 KiB
C
#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <sys/sysctl.h>
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int main(void) {
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size_t length = 0;
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if (sysctlbyname("hw.cpufrequency", NULL, &length, NULL, 0) || length != sizeof(uint64_t)) return 1;
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const char *paths[] = {
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"/Volumes/SystemRoot/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq",
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"/Volumes/SystemRoot/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq",
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"/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq",
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"/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq"
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};
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uint64_t expected = 0;
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for (unsigned i=0; i<4; ++i) {
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FILE* source = fopen(paths[i], "r");
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unsigned long long khz = 0;
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if (!source) continue;
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int found = fscanf(source, "%llu", &khz); fclose(source);
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if (found == 1 && khz > 0 && khz <= UINT64_MAX/1000) { expected = khz * 1000; break; }
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}
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uint64_t hz = 0;
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length = sizeof(hz);
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if (sysctlbyname("hw.cpufrequency", &hz, &length, NULL, 0)) {
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if (errno != ENOENT || expected) return 2;
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puts("CPU_FREQUENCY unavailable=1 invented_frequency=0 pass=1");
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return 0;
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}
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if (length != 8 || hz < 1000000) return 3;
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if (expected && hz != expected) return 4;
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struct { uint32_t before, value, after; } legacy = {0x12345678,0,0x87654321};
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int mib[] = {CTL_HW, HW_CPU_FREQ}; length = sizeof(legacy.value);
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if (sysctl(mib, 2, &legacy.value, &length, NULL, 0) || length != 4 || legacy.value != (uint32_t)hz ||
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legacy.before != 0x12345678 || legacy.after != 0x87654321) return 5;
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printf("CPU_FREQUENCY hz=%llu width64=1 legacy_width32=1 pass=1\n", (unsigned long long)hz);
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return 0;
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}
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