diff options
Diffstat (limited to 'include/nm-macros-internal.h')
| -rw-r--r-- | include/nm-macros-internal.h | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/include/nm-macros-internal.h b/include/nm-macros-internal.h new file mode 100644 index 000000000..405051f38 --- /dev/null +++ b/include/nm-macros-internal.h @@ -0,0 +1,248 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ +/* NetworkManager -- Network link manager + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the + * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301 USA. + * + * (C) Copyright 2014 Red Hat, Inc. + */ + +#ifndef __NM_MACROS_INTERNAL_H__ +#define __NM_MACROS_INTERNAL_H__ + + +#include <glib.h> + +/********************************************************/ + +/* http://stackoverflow.com/a/11172679 */ +#define _NM_UTILS_MACRO_FIRST(...) __NM_UTILS_MACRO_FIRST_HELPER(__VA_ARGS__, throwaway) +#define __NM_UTILS_MACRO_FIRST_HELPER(first, ...) first + +#define _NM_UTILS_MACRO_REST(...) __NM_UTILS_MACRO_REST_HELPER(__NM_UTILS_MACRO_REST_NUM(__VA_ARGS__), __VA_ARGS__) +#define __NM_UTILS_MACRO_REST_HELPER(qty, ...) __NM_UTILS_MACRO_REST_HELPER2(qty, __VA_ARGS__) +#define __NM_UTILS_MACRO_REST_HELPER2(qty, ...) __NM_UTILS_MACRO_REST_HELPER_##qty(__VA_ARGS__) +#define __NM_UTILS_MACRO_REST_HELPER_ONE(first) +#define __NM_UTILS_MACRO_REST_HELPER_TWOORMORE(first, ...) , __VA_ARGS__ +#define __NM_UTILS_MACRO_REST_NUM(...) \ + __NM_UTILS_MACRO_REST_SELECT_20TH(__VA_ARGS__, \ + TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE,\ + TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE,\ + TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE, TWOORMORE,\ + TWOORMORE, TWOORMORE, TWOORMORE, ONE, throwaway) +#define __NM_UTILS_MACRO_REST_SELECT_20TH(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20, ...) a20 + +/********************************************************/ + +#if defined (__GNUC__) +#define _NM_PRAGMA_WARNING_DO(warning) G_STRINGIFY(GCC diagnostic ignored warning) +#elif defined (__clang__) +#define _NM_PRAGMA_WARNING_DO(warning) G_STRINGIFY(clang diagnostic ignored warning) +#endif + +/* you can only suppress a specific warning that the compiler + * understands. Otherwise you will get another compiler warning + * about invalid pragma option. + * It's not that bad however, because gcc and clang often have the + * same name for the same warning. */ + +#if defined (__GNUC__) +#define NM_PRAGMA_WARNING_DISABLE(warning) \ + _Pragma("GCC diagnostic push"); \ + _Pragma(_NM_PRAGMA_WARNING_DO(warning)) +#elif defined (__clang__) +#define NM_PRAGMA_WARNING_DISABLE(warning) \ + _Pragma("clang diagnostic push"); \ + _Pragma(_NM_PRAGMA_WARNING_DO(warning)) +#else +#define NM_PRAGMA_WARNING_DISABLE(warning) +#endif + +#if defined (__GNUC__) +#define NM_PRAGMA_WARNING_REENABLE \ + _Pragma("GCC diagnostic pop") +#elif defined (__clang__) +#define NM_PRAGMA_WARNING_REENABLE \ + _Pragma("clang diagnostic pop") +#else +#define NM_PRAGMA_WARNING_REENABLE +#endif + +/********************************************************/ + +/* macro to return strlen() of a compile time string. */ +#define STRLEN(str) ( sizeof ("" str) - 1 ) + +#define NM_IN_SET(x, y, ...) \ + ({ \ + const typeof(y) _y = (y); \ + typeof(_y) _x = (x); \ + unsigned _i; \ + gboolean _found = FALSE; \ + for (_i = 0; _i < 1 + sizeof((typeof(_x)[]) { __VA_ARGS__ })/sizeof(typeof(_x)); _i++) { \ + if (((typeof(_x)[]) { _y, __VA_ARGS__ })[_i] == _x) { \ + _found = TRUE; \ + break; \ + } \ + } \ + _found; \ + }) + +#define NM_PRINT_FMT_QUOTED(cond, prefix, str, suffix, str_else) \ + (cond) ? (prefix) : "", \ + (cond) ? (str) : (str_else), \ + (cond) ? (suffix) : "" + +/*****************************************************************************/ + +#ifdef NM_MORE_ASSERTS +#define nm_assert(cond) G_STMT_START { g_assert (cond); } G_STMT_END +#else +#define nm_assert(cond) G_STMT_START { if (FALSE) { if (cond) { } } } G_STMT_END +#endif + +/*****************************************************************************/ + +#define NM_DEFINE_SINGLETON_INSTANCE(TYPE) \ +static TYPE *singleton_instance + +#define NM_DEFINE_SINGLETON_WEAK_REF(TYPE) \ +NM_DEFINE_SINGLETON_INSTANCE (TYPE); \ +static void \ +_singleton_instance_weak_ref_cb (gpointer data, \ + GObject *where_the_object_was) \ +{ \ + nm_log_dbg (LOGD_CORE, "disposing %s singleton (%p)", G_STRINGIFY (TYPE), singleton_instance); \ + singleton_instance = NULL; \ +} \ +static inline void \ +nm_singleton_instance_weak_ref_register (void) \ +{ \ + g_object_weak_ref (G_OBJECT (singleton_instance), _singleton_instance_weak_ref_cb, NULL); \ +} + +#define NM_DEFINE_SINGLETON_DESTRUCTOR(TYPE) \ +NM_DEFINE_SINGLETON_INSTANCE (TYPE); \ +static void __attribute__((destructor)) \ +_singleton_destructor (void) \ +{ \ + if (singleton_instance) { \ + if (G_OBJECT (singleton_instance)->ref_count > 1) \ + nm_log_dbg (LOGD_CORE, "disown %s singleton (%p)", G_STRINGIFY (TYPE), singleton_instance); \ + g_object_unref (singleton_instance); \ + } \ +} + +/* By default, the getter will assert that the singleton will be created only once. You can + * change this by redefining NM_DEFINE_SINGLETON_ALLOW_MULTIPLE. */ +#ifndef NM_DEFINE_SINGLETON_ALLOW_MULTIPLE +#define NM_DEFINE_SINGLETON_ALLOW_MULTIPLE FALSE +#endif + +#define NM_DEFINE_SINGLETON_GETTER(TYPE, GETTER, GTYPE, ...) \ +NM_DEFINE_SINGLETON_INSTANCE (TYPE); \ +NM_DEFINE_SINGLETON_WEAK_REF (TYPE); \ +TYPE * \ +GETTER (void) \ +{ \ + if (G_UNLIKELY (!singleton_instance)) { \ + static char _already_created = FALSE; \ +\ + g_assert (!_already_created || (NM_DEFINE_SINGLETON_ALLOW_MULTIPLE)); \ + _already_created = TRUE;\ + singleton_instance = (g_object_new (GTYPE, ##__VA_ARGS__, NULL)); \ + g_assert (singleton_instance); \ + nm_singleton_instance_weak_ref_register (); \ + nm_log_dbg (LOGD_CORE, "create %s singleton (%p)", G_STRINGIFY (TYPE), singleton_instance); \ + } \ + return singleton_instance; \ +} \ +NM_DEFINE_SINGLETON_DESTRUCTOR(TYPE) + +/*****************************************************************************/ + +static inline gboolean +nm_clear_g_source (guint *id) +{ + if (id && *id) { + g_source_remove (*id); + *id = 0; + return TRUE; + } + return FALSE; +} + +/*****************************************************************************/ + +/* Determine whether @x is a power of two (@x being an integer type). + * For the special cases @x equals zero or one, it also returns true. + * For negative @x, always returns FALSE. That only applies, if the data + * type of @x is signed. */ +#define nm_utils_is_power_of_two(x) ({ \ + const typeof(x) __x = (x); \ + \ + ((__x & (__x - 1)) == 0) && \ + /* Check if the value is negative. In that case, return FALSE. + * The first expression is a compile time constant, depending on whether + * the type is signed. The second expression is a clumsy way for (__x >= 0), + * which causes a compiler warning for unsigned types. */ \ + ( ( ((typeof(__x)) -1) > ((typeof(__x)) 0) ) || (__x > 0) || (__x == 0) ); \ + }) + +/*****************************************************************************/ + +/* check if @flags has exactly one flag (@check) set. You should call this + * only with @check being a compile time constant and a power of two. */ +#define NM_FLAGS_HAS(flags, check) \ + ( (G_STATIC_ASSERT_EXPR ( ((check) != 0) && ((check) & ((check)-1)) == 0 )), (NM_FLAGS_ANY ((flags), (check))) ) + +#define NM_FLAGS_ANY(flags, check) ( ( ((flags) & (check)) != 0 ) ? TRUE : FALSE ) +#define NM_FLAGS_ALL(flags, check) ( ( ((flags) & (check)) == (check) ) ? TRUE : FALSE ) + +#define NM_FLAGS_SET(flags, val) ({ \ + const typeof(flags) _flags = (flags); \ + const typeof(flags) _val = (val); \ + \ + _flags | _val; \ + }) + +#define NM_FLAGS_UNSET(flags, val) ({ \ + const typeof(flags) _flags = (flags); \ + const typeof(flags) _val = (val); \ + \ + _flags & (~_val); \ + }) + +#define NM_FLAGS_ASSIGN(flags, val, assign) ({ \ + const typeof(flags) _flags = (flags); \ + const typeof(flags) _val = (val); \ + \ + (assign) \ + ? _flags | (_val) \ + : _flags & (~_val); \ + }) + +/*****************************************************************************/ + +static inline char * +nm_strstrip (char *str) +{ + /* g_strstrip doesn't like NULL. */ + return str ? g_strstrip (str) : NULL; +} + +/*****************************************************************************/ + +#endif /* __NM_MACROS_INTERNAL_H__ */ |