cpp-common/bt2c/fmt.hpp: use `wise_enum::string_type` in `EnableIfIsWiseEnum` definition

[babeltrace.git] / src / common / macros.h

diff --git a/src/common/macros.h b/src/common/macros.h
index 718a3050ccb1b4b96b9a00cf84adeb35185bdae0..8120515c63fe5bbcd81672f8c7b4cf1df89d9ce8 100644 (file)
--- a/src/common/macros.h
+++ b/src/common/macros.h
@@ -7,18 +7,42 @@
 #ifndef _BABELTRACE_INTERNAL_H
 #define _BABELTRACE_INTERNAL_H
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+#define BT_EXTERN_C extern "C"
+#else
+#define BT_EXTERN_C
+#endif
+
 #define bt_max_t(type, a, b)   \
        ((type) (a) > (type) (b) ? (type) (a) : (type) (b))
 
 /*
- * BT_HIDDEN: set the hidden attribute for internal functions
- * On Windows, symbols are local unless explicitly exported,
- * see https://gcc.gnu.org/wiki/Visibility
+ * BT_EXPORT: set the visibility for exported functions.
  */
 #if defined(_WIN32) || defined(__CYGWIN__)
-#define BT_HIDDEN
+#define BT_EXPORT
+#else
+#define BT_EXPORT __attribute__((visibility("default")))
+#endif
+
+/*
+ * BT_NOEXCEPT: defined to `noexcept` if compiling as C++, else empty.
+ */
+#if defined(__cplusplus)
+#define BT_NOEXCEPT noexcept
+#else
+#define BT_NOEXCEPT
+#endif
+
+/* Enable `txt` if developer mode is enabled. */
+#ifdef BT_DEV_MODE
+#define BT_IF_DEV_MODE(txt) txt
 #else
-#define BT_HIDDEN __attribute__((visibility("hidden")))
+#define BT_IF_DEV_MODE(txt)
 #endif
 
 /*
@@ -39,11 +63,15 @@
 
 #define BT_MOVE_REF(ref)               \
        ({                              \
-               typeof(ref) _ref = ref; \
+               __typeof__(ref) _ref = ref;     \
                ref = NULL;             \
                _ref;                   \
        })
 
+/* Wrapper for g_array_index that adds bound checking.  */
+#define bt_g_array_index(a, t, i)              \
+       g_array_index((a), t, ({ BT_ASSERT_DBG((i) < (a)->len); (i); }))
+
 /*
  * Copied from:
  * <https://stackoverflow.com/questions/37411809/how-to-elegantly-fix-this-unused-variable-warning/37412551#37412551>:
@@ -71,4 +99,24 @@
        ((void) sizeof((void) (_expr1), (void) (_expr2),                \
                (void) (_expr3), (void) (_expr4), (void) (_expr5), 0))
 
+#define BT_DIAG_PUSH _Pragma ("GCC diagnostic push")
+#define BT_DIAG_POP _Pragma ("GCC diagnostic push")
+
+#define BT_DIAG_IGNORE_SHADOW _Pragma("GCC diagnostic ignored \"-Wshadow\"")
+
+#if defined __clang__
+#  if __has_warning("-Wunused-but-set-variable")
+#    define BT_DIAG_IGNORE_UNUSED_BUT_SET_VARIABLE \
+       _Pragma("GCC diagnostic ignored \"-Wunused-but-set-variable\"")
+#  endif
+#endif
+
+#if !defined BT_DIAG_IGNORE_UNUSED_BUT_SET_VARIABLE
+#  define BT_DIAG_IGNORE_UNUSED_BUT_SET_VARIABLE
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif