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李通洲
36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
#include "memory.h"
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#include "common/debug.h"
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#include <string.h>
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#include <mach/mach.h>
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#include <sys/sysctl.h>
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#include <unistd.h>
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const char* ffDetectMemory(FFMemoryResult* ram) {
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size_t length = sizeof(ram->bytesTotal);
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#if FF_APPLE_MEMSIZE_USABLE
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if (sysctlbyname("hw.memsize_usable", &ram->bytesTotal, &length, nullptr, 0) != 0) {
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return "Failed to read hw.memsize_usable";
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}
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#else
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if (sysctl((int[]) { CTL_HW, HW_MEMSIZE }, 2, &ram->bytesTotal, &length, nullptr, 0) != 0) {
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return "Failed to read hw.memsize";
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}
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#endif
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mach_msg_type_number_t count = HOST_VM_INFO64_COUNT;
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vm_statistics64_data_t vmstat;
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if (host_statistics64(mach_host_self(), HOST_VM_INFO64, (host_info64_t) (&vmstat), &count) != KERN_SUCCESS) {
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return "Failed to read host_statistics64";
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}
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// https://github.com/st3fan/osx-10.9/blob/34e34a6a539b5a822cda4074e56a7ced9b57da71/system_cmds-597.1.1/vm_stat.tproj/vm_stat.c#L139
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uint64_t pagesFree = vmstat.free_count - vmstat.speculative_count;
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uint64_t pagesFileBacked = vmstat.external_page_count; // Cached files
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ram->bytesUsed = ram->bytesTotal - ((pagesFree + pagesFileBacked) << instance.state.platform.sysinfo.pageSizeShift);
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return nullptr;
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}
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