Exercise on memory management analyzer

exercises/mem_analyzer/mem_utils.c

@@ -0,0 +1,47 @@
+#include "mem_utils.h"
+#include <stdio.h>
+#include <string.h>
+
+void print_stats(struct Stats *stats)
+{
+	printf("Allocator: %s\nBlocks: %ld\nAvarage Allocation Time: %.2f "
+	       "μs\nAvarage Free Time: %.2f μs\nPeak Memory Usage: %.2f MB\n",
+	       stats->allocator_type, stats->nr_allocations,
+	       stats->avg_alloc_time*1e6, stats->avg_free_time*1e6,
+	       stats->mem_usage_mb);
+}
+
+double avg(double *values, int size)
+{
+	double sum = 0.0;
+	for (int i = 0; i < size; i++) {
+		sum += *(values + i);
+	}
+	return size > 0 ? sum / size : 0.0;
+}
+
+double get_mem_usage()
+{
+	FILE *fp = fopen("/proc/self/status", "r");
+	if (!fp) {
+		perror("fopen");
+		return 1;
+	}
+
+  int found = 0;
+	char line[256];
+	while (fgets(line, sizeof(line), fp)) {
+		if (strncmp(line, "VmRSS:", 6) == 0) {
+      found = 1;
+			break;
+		}
+	}
+	fclose(fp);
+
+  if (!found) {
+    fprintf(stderr, "VmRSS not found in /proc/self/status\n");
+    return 0.0;
+  }
+
+	return strtod(line + 6, NULL) / 1024.0;
+}