utils 按作用拆成 log/macros/memory 三个模块

src/base/macros.h

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <stddef.h>
+#include <sys/types.h>
+
+#define ssizeof(foo) (ssize_t)sizeof(foo)
+#define countof(foo) (ssizeof(foo) / ssizeof(foo[0]))
+
+#ifdef __GNUC__
+#define likely(expr) __builtin_expect(!!(expr), 1)
+#define unlikely(expr) __builtin_expect((expr), 0)
+#else
+#define likely(expr) expr
+#define unlikely(expr) expr
+#endif
+
+#ifdef MIN
+#undef MIN
+#endif
+#ifndef MIN
+#define MIN(a, b) (((a) < (b)) ? (a) : (b))
+#endif
+
+#ifdef MAX
+#undef MAX
+#endif
+#ifndef MAX
+#define MAX(a, b) (((a) > (b)) ? (a) : (b))
+#endif