Memory (macOS): uses hw.memsize_usable

Author: CarterLi

CHANGELOG.md

@@ -5,6 +5,7 @@ Features:
 * Adds a `tempSensor` option to specify the sensor name used for CPU temperature detection (CPU)
     * Example: `{ "type": "cpu", "tempSensor": "hwmon0" /* Use /sys/class/hwmon/hwmon0 for temperature detection */ }`
 * Minor optimizations
+* Reports usable RAM size to match other platforms (Memory, macOS)
 
 Bugfixes:
 * Fixes cache line size detection (CPU, macOS)

src/detection/memory/memory_apple.c

@@ -8,8 +8,11 @@
 const char* ffDetectMemory(FFMemoryResult* ram)
 {
     size_t length = sizeof(ram->bytesTotal);
-    if (sysctl((int[]){ CTL_HW, HW_MEMSIZE }, 2, &ram->bytesTotal, &length, NULL, 0))
-        return "Failed to read hw.memsize";
+    if (sysctlbyname("hw.memsize_usable", &ram->bytesTotal, &length, NULL, 0) != 0)
+    {
+        if (sysctl((int[]){ CTL_HW, HW_MEMSIZE }, 2, &ram->bytesTotal, &length, NULL, 0) != 0)
+            return "Failed to read hw.memsize";
+    }
 
     mach_msg_type_number_t count = HOST_VM_INFO64_COUNT;
     vm_statistics64_data_t vmstat;