1 files changed, 48 insertions, 0 deletions
diff --git a/src/sysfs.c b/src/sysfs.c
new file mode 100644
index 0000000..692ef47
--- /dev/null
+++ b/src/sysfs.c
@@ -0,0 +1,48 @@
+#include <glib.h>
+#include <stdio.h>
+#include "zenmonitor.h"
+
+#define SYSFS_DIR_CPUS "/sys/bus/cpu/devices"
+
+gshort* get_cpu_dev_ids(){
+    gshort *cpu_dev_ids = NULL;
+    gshort coreid, cpuid;
+    GDir *dir;
+    const gchar *entry;
+    gchar *filename, *buffer;
+    guint cores, i;
+
+    cores = get_core_count();
+    cpu_dev_ids = malloc(cores * sizeof (gshort));
+    memset(cpu_dev_ids, -1, cores * sizeof (gshort));
+
+    dir = g_dir_open(SYSFS_DIR_CPUS, 0, NULL);
+    if (dir) {
+        while ((entry = g_dir_read_name(dir))) {
+            if (sscanf(entry, "cpu%hd", &cpuid) != 1) {
+                continue;
+            }
+
+            filename = g_build_filename(SYSFS_DIR_CPUS, entry, "topology", "core_id", NULL);
+            if (g_file_get_contents(filename, &buffer, NULL, NULL)) {
+                coreid = (gshort) atoi(buffer);
+
+                if (coreid < cores && cpu_dev_ids[coreid] == -1) {
+                    cpu_dev_ids[coreid] = cpuid;
+                }
+            }
+
+            g_free(filename);
+            g_free(buffer);
+        }
+    }
+
+    for (i = 0; i < cores; i++) {
+        if (cpu_dev_ids[i] < 0) {
+            cpu_dev_ids[i] = i;
+        }
+    }
+
+    return cpu_dev_ids;
+}
+