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Merge branch 'gmacros-initialize-variable' into 'main'

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gmacros: zero-initialize int G_PASTE (_g_boolean_var_, uniq)

Closes #3582

See merge request GNOME/glib!4456
This commit is contained in:
Michael Catanzaro 2025-01-17 20:21:45 +00:00
commit 26bc1d08ec
2 changed files with 24 additions and 3 deletions
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4
glib/gmacros.h
View File

@ -1239,11 +1239,9 @@
#if G_GNUC_CHECK_VERSION(2, 0) && defined(__OPTIMIZE__)
#define _G_BOOLEAN_EXPR_IMPL(uniq, expr) \
G_GNUC_EXTENSION ({ \
int G_PASTE (_g_boolean_var_, uniq); \
int G_PASTE (_g_boolean_var_, uniq) = 0; \
if (expr) \
G_PASTE (_g_boolean_var_, uniq) = 1; \
else \
G_PASTE (_g_boolean_var_, uniq) = 0; \
G_PASTE (_g_boolean_var_, uniq); \
})
#define _G_BOOLEAN_EXPR(expr) _G_BOOLEAN_EXPR_IMPL (__COUNTER__, expr)

23
glib/tests/cxx.cpp
View File

@ -536,6 +536,25 @@ test_string_free (void)
g_free (data);
}
#if G_CXX_STD_CHECK_VERSION(14)
static constexpr gboolean
g_likely_test_expr (void)
{
if G_LIKELY (1 == 1)
{
return TRUE;
}
}
static void
test_constexpr_var_init (void)
{
g_test_message ("Test that G_LIKELY macro creates an initialized variable "
"for compatibility with constexpr");
g_assert_true (g_likely_test_expr ());
}
#endif
#ifdef G_OS_WIN32
static void
test_clear_com (void)
@ -595,6 +614,10 @@ main (int argc, char *argv[])
g_test_add_func ("/C++/string-append", test_string_append);
g_test_add_func ("/C++/string-free", test_string_free);
#if G_CXX_STD_CHECK_VERSION(14)
g_test_add_func ("/C++/constexpr-var-init", test_constexpr_var_init);
#endif
#ifdef G_OS_WIN32
g_test_add_func ("/C++/test_clear_com", test_clear_com);
#endif