/* * GLIB Compatibility Functions * * Copyright IBM, Corp. 2013 * * Authors: * Anthony Liguori <aliguori@us.ibm.com> * Michael Tokarev <mjt@tls.msk.ru> * Paolo Bonzini <pbonzini@redhat.com> * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. * */ #ifndef QEMU_GLIB_COMPAT_H #define QEMU_GLIB_COMPAT_H /* Ask for warnings for anything that was marked deprecated in * the defined version, or before. It is a candidate for rewrite. */ #define GLIB_VERSION_MIN_REQUIRED GLIB_VERSION_2_40 /* Ask for warnings if code tries to use function that did not * exist in the defined version. These risk breaking builds */ #define GLIB_VERSION_MAX_ALLOWED GLIB_VERSION_2_40 #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wdeprecated-declarations" #include <glib.h> /* * Note that because of the GLIB_VERSION_MAX_ALLOWED constant above, allowing * use of functions from newer GLib via this compat header needs a little * trickery to prevent warnings being emitted. * * Consider a function from newer glib-X.Y that we want to use * * int g_foo(const char *wibble) * * We must define a static inline function with the same signature that does * what we need, but with a "_qemu" suffix e.g. * * static inline void g_foo_qemu(const char *wibble) * { * #if GLIB_CHECK_VERSION(X, Y, 0) * g_foo(wibble) * #else * g_something_equivalent_in_older_glib(wibble); * #endif * } * * The #pragma at the top of this file turns off -Wdeprecated-declarations, * ensuring this wrapper function impl doesn't trigger the compiler warning * about using too new glib APIs. Finally we can do * * #define g_foo(a) g_foo_qemu(a) * * So now the code elsewhere in QEMU, which *does* have the * -Wdeprecated-declarations warning active, can call g_foo(...) as normal, * without generating warnings. */ static inline gboolean g_strv_contains_qemu(const gchar *const *strv, const gchar *str) { #if GLIB_CHECK_VERSION(2, 44, 0) return g_strv_contains(strv, str); #else g_return_val_if_fail(strv != NULL, FALSE); g_return_val_if_fail(str != NULL, FALSE); for (; *strv != NULL; strv++) { if (g_str_equal(str, *strv)) { return TRUE; } } return FALSE; #endif } #define g_strv_contains(a, b) g_strv_contains_qemu(a, b) #if defined(_WIN32) && !GLIB_CHECK_VERSION(2, 50, 0) /* * g_poll has a problem on Windows when using * timeouts < 10ms, so use wrapper. */ #define g_poll(fds, nfds, timeout) g_poll_fixed(fds, nfds, timeout) gint g_poll_fixed(GPollFD *fds, guint nfds, gint timeout); #endif #ifndef g_assert_cmpmem #define g_assert_cmpmem(m1, l1, m2, l2) \ do { \ gconstpointer __m1 = m1, __m2 = m2; \ int __l1 = l1, __l2 = l2; \ if (__l1 != __l2) { \ g_assertion_message_cmpnum( \ G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \ #l1 " (len(" #m1 ")) == " #l2 " (len(" #m2 "))", __l1, "==", \ __l2, 'i'); \ } else if (memcmp(__m1, __m2, __l1) != 0) { \ g_assertion_message(G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \ "assertion failed (" #m1 " == " #m2 ")"); \ } \ } while (0) #endif #pragma GCC diagnostic pop #endif