1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-internals.h random utility stuff (internal to D-Bus implementation)
4 * Copyright (C) 2002, 2003 Red Hat, Inc.
6 * Licensed under the Academic Free License version 2.1
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #ifdef DBUS_INSIDE_DBUS_H
24 #error "You can't include dbus-internals.h in the public header dbus.h"
27 #ifndef DBUS_INTERNALS_H
28 #define DBUS_INTERNALS_H
30 #include <dbus/dbus-memory.h>
31 #include <dbus/dbus-types.h>
32 #include <dbus/dbus-errors.h>
33 #include <dbus/dbus-sysdeps.h>
34 #include <dbus/dbus-threads-internal.h>
39 void _dbus_warn (const char *format,
40 ...) _DBUS_GNUC_PRINTF (1, 2);
43 void _dbus_warn_check_failed (const char *format,
44 ...) _DBUS_GNUC_PRINTF (1, 2);
47 #if defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
48 #define _DBUS_FUNCTION_NAME __func__
49 #elif defined(__GNUC__) || defined(_MSC_VER)
50 #define _DBUS_FUNCTION_NAME __FUNCTION__
52 #define _DBUS_FUNCTION_NAME "unknown function"
58 * The _DBUS_LIKELY and _DBUS_UNLIKELY macros let the programmer give hints to
59 * the compiler about the expected result of an expression. Some compilers
60 * can use this information for optimizations.
62 * The _DBUS_BOOLEAN_EXPR macro is intended to trigger a gcc warning when
63 * putting assignments in the macro arg
65 #if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
66 #define _DBUS_BOOLEAN_EXPR(expr) \
68 int _dbus_boolean_var_; \
70 _dbus_boolean_var_ = 1; \
72 _dbus_boolean_var_ = 0; \
75 #define _DBUS_LIKELY(expr) (__builtin_expect (_DBUS_BOOLEAN_EXPR(expr), 1))
76 #define _DBUS_UNLIKELY(expr) (__builtin_expect (_DBUS_BOOLEAN_EXPR(expr), 0))
78 #define _DBUS_LIKELY(expr) (expr)
79 #define _DBUS_UNLIKELY(expr) (expr)
82 #ifdef DBUS_ENABLE_VERBOSE_MODE
85 at least gnu cc and msvc compiler are known to
86 have support for variable macro argument lists
87 add other compilers is required
89 #if defined(__GNUC__) || defined(_MSC_VER)
90 #define DBUS_CPP_SUPPORTS_VARIABLE_MACRO_ARGUMENTS
93 #ifdef DBUS_CPP_SUPPORTS_VARIABLE_MACRO_ARGUMENTS
95 void _dbus_verbose_real (const char *file, const int line, const char *function,
96 const char *format,...) _DBUS_GNUC_PRINTF (4, 5);
97 # define _dbus_verbose(fmt,...) _dbus_verbose_real( __FILE__,__LINE__,__FUNCTION__,fmt, ## __VA_ARGS__)
100 void _dbus_verbose_real (const char *format,
101 ...) _DBUS_GNUC_PRINTF (1, 2);
102 # define _dbus_verbose _dbus_verbose_real
105 void _dbus_verbose_reset_real (void);
107 dbus_bool_t _dbus_is_verbose_real (void);
109 dbus_bool_t _dbus_get_verbose (void);
111 void _dbus_set_verbose (dbus_bool_t state);
113 # define _dbus_verbose_reset _dbus_verbose_reset_real
114 # define _dbus_is_verbose _dbus_is_verbose_real
116 # ifdef HAVE_ISO_VARARGS
117 # define _dbus_verbose(...) do { } while (0)
118 # elif defined (HAVE_GNUC_VARARGS)
119 # define _dbus_verbose(format...) do { } while (0)
121 static void _dbus_verbose(const char * x,...) {;}
123 # define _dbus_verbose_reset() do { } while (0)
124 # define _dbus_is_verbose() FALSE
125 #endif /* !DBUS_ENABLE_VERBOSE_MODE */
128 void _dbus_trace_ref (const char *obj_name,
137 const char* _dbus_strerror (int error_number);
139 #ifdef DBUS_DISABLE_ASSERT
140 #define _dbus_assert(condition) do { } while (0)
143 void _dbus_real_assert (dbus_bool_t condition,
144 const char *condition_text,
148 #define _dbus_assert(condition) \
149 _dbus_real_assert ((condition) != 0, #condition, __FILE__, __LINE__, _DBUS_FUNCTION_NAME)
150 #endif /* !DBUS_DISABLE_ASSERT */
152 #ifdef DBUS_DISABLE_ASSERT
153 #define _dbus_assert_not_reached(explanation) do { } while (0)
156 void _dbus_real_assert_not_reached (const char *explanation,
158 int line) _DBUS_GNUC_NORETURN;
159 #define _dbus_assert_not_reached(explanation) \
160 _dbus_real_assert_not_reached (explanation, __FILE__, __LINE__)
161 #endif /* !DBUS_DISABLE_ASSERT */
163 #ifdef DBUS_DISABLE_CHECKS
164 #define _dbus_return_if_fail(condition)
165 #define _dbus_return_val_if_fail(condition, val)
169 extern const char *_dbus_return_if_fail_warning_format;
171 #define _dbus_return_if_fail(condition) do { \
172 _dbus_assert ((*(const char*)_DBUS_FUNCTION_NAME) != '_'); \
173 if (!(condition)) { \
174 _dbus_warn_check_failed (_dbus_return_if_fail_warning_format, \
175 _DBUS_FUNCTION_NAME, #condition, __FILE__, __LINE__); \
179 #define _dbus_return_val_if_fail(condition, val) do { \
180 _dbus_assert ((*(const char*)_DBUS_FUNCTION_NAME) != '_'); \
181 if (!(condition)) { \
182 _dbus_warn_check_failed (_dbus_return_if_fail_warning_format, \
183 _DBUS_FUNCTION_NAME, #condition, __FILE__, __LINE__); \
187 #endif /* !DBUS_DISABLE_ASSERT */
189 #define _DBUS_N_ELEMENTS(array) ((int) (sizeof ((array)) / sizeof ((array)[0])))
191 #define _DBUS_POINTER_TO_INT(pointer) ((intptr_t)(pointer))
192 #define _DBUS_INT_TO_POINTER(integer) ((void*)((intptr_t)(integer)))
194 #define _DBUS_ZERO(object) (memset (&(object), '\0', sizeof ((object))))
196 #define _DBUS_STRUCT_OFFSET(struct_type, member) \
197 ((intptr_t) ((unsigned char*) &((struct_type*) 0)->member))
199 #define _DBUS_ALIGNOF(type) \
200 (_DBUS_STRUCT_OFFSET (struct { char _1; type _2; }, _2))
202 #ifdef DBUS_DISABLE_CHECKS
203 /* this is an assert and not an error, but in the typical --disable-checks case (you're trying
204 * to really minimize code size), disabling these assertions makes sense.
206 #define _DBUS_ASSERT_ERROR_IS_SET(error) do { } while (0)
207 #define _DBUS_ASSERT_ERROR_IS_CLEAR(error) do { } while (0)
210 _dbus_assert_error_is_set (const DBusError *error)
212 _dbus_assert (error == NULL || dbus_error_is_set (error));
216 _dbus_assert_error_is_clear (const DBusError *error)
218 _dbus_assert (error == NULL || !dbus_error_is_set (error));
221 #define _DBUS_ASSERT_ERROR_IS_SET(error) _dbus_assert_error_is_set(error)
222 #define _DBUS_ASSERT_ERROR_IS_CLEAR(error) _dbus_assert_error_is_clear(error)
225 #define _dbus_return_if_error_is_set(error) _dbus_return_if_fail ((error) == NULL || !dbus_error_is_set ((error)))
226 #define _dbus_return_val_if_error_is_set(error, val) _dbus_return_val_if_fail ((error) == NULL || !dbus_error_is_set ((error)), (val))
228 /* This alignment thing is from ORBit2 */
229 /* Align a value upward to a boundary, expressed as a number of bytes.
230 * E.g. align to an 8-byte boundary with argument of 8.
234 * (this + boundary - 1)
239 #define _DBUS_ALIGN_VALUE(this, boundary) \
240 (( ((uintptr_t)(this)) + (((uintptr_t)(boundary)) -1)) & (~(((uintptr_t)(boundary))-1)))
242 #define _DBUS_ALIGN_ADDRESS(this, boundary) \
243 ((void*)_DBUS_ALIGN_VALUE(this, boundary))
247 char* _dbus_strdup (const char *str);
248 void* _dbus_memdup (const void *mem,
251 dbus_bool_t _dbus_string_array_contains (const char **array,
254 size_t _dbus_string_array_length (const char **array);
255 char** _dbus_dup_string_array (const char **array);
257 #define _DBUS_INT16_MIN ((dbus_int16_t) 0x8000)
258 #define _DBUS_INT16_MAX ((dbus_int16_t) 0x7fff)
259 #define _DBUS_UINT16_MAX ((dbus_uint16_t)0xffff)
260 #define _DBUS_INT32_MIN ((dbus_int32_t) 0x80000000)
261 #define _DBUS_INT32_MAX ((dbus_int32_t) 0x7fffffff)
262 #define _DBUS_UINT32_MAX ((dbus_uint32_t)0xffffffff)
263 /* using 32-bit here is sort of bogus */
264 #define _DBUS_INT_MIN _DBUS_INT32_MIN
265 #define _DBUS_INT_MAX _DBUS_INT32_MAX
266 #define _DBUS_UINT_MAX _DBUS_UINT32_MAX
267 #define _DBUS_INT64_MAX DBUS_INT64_CONSTANT (0x7fffffffffffffff)
268 #define _DBUS_UINT64_MAX DBUS_UINT64_CONSTANT (0xffffffffffffffff)
269 #define _DBUS_ONE_KILOBYTE 1024
270 #define _DBUS_ONE_MEGABYTE 1024 * _DBUS_ONE_KILOBYTE
271 #define _DBUS_ONE_HOUR_IN_MILLISECONDS (1000 * 60 * 60)
272 #define _DBUS_USEC_PER_SECOND (1000000)
275 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
278 #define MIN(a, b) (((a) < (b)) ? (a) : (b))
281 #define ABS(a) (((a) < 0) ? -(a) : (a))
283 #define _DBUS_ISASCII(c) ((c) != '\0' && (((c) & ~0x7f) == 0))
285 typedef void (* DBusForeachFunction) (void *element,
288 void _dbus_verbose_bytes (const unsigned char *data,
292 void _dbus_verbose_bytes_of_string (const DBusString *str,
297 extern const char *_dbus_no_memory_message;
298 #define _DBUS_SET_OOM(error) dbus_set_error_const ((error), DBUS_ERROR_NO_MEMORY, _dbus_no_memory_message)
300 void _dbus_set_error_valist (DBusError *error,
303 va_list args) _DBUS_GNUC_PRINTF (3, 0);
305 #ifdef DBUS_ENABLE_EMBEDDED_TESTS
306 /* Memory debugging */
307 void _dbus_set_fail_alloc_counter (int until_next_fail);
308 int _dbus_get_fail_alloc_counter (void);
309 void _dbus_set_fail_alloc_failures (int failures_per_failure);
310 int _dbus_get_fail_alloc_failures (void);
311 dbus_bool_t _dbus_decrement_fail_alloc_counter (void);
312 dbus_bool_t _dbus_disable_mem_pools (void);
314 int _dbus_get_malloc_blocks_outstanding (void);
316 typedef dbus_bool_t (* DBusTestMemoryFunction) (void *data);
318 dbus_bool_t _dbus_test_oom_handling (const char *description,
319 DBusTestMemoryFunction func,
322 #define _dbus_set_fail_alloc_counter(n)
323 #define _dbus_get_fail_alloc_counter _DBUS_INT_MAX
325 /* These are constant expressions so that blocks
326 * they protect should be optimized away
328 #define _dbus_decrement_fail_alloc_counter() (FALSE)
329 #define _dbus_disable_mem_pools() (FALSE)
330 #define _dbus_get_malloc_blocks_outstanding (0)
331 #endif /* !DBUS_ENABLE_EMBEDDED_TESTS */
333 typedef void (* DBusShutdownFunction) (void *data);
335 dbus_bool_t _dbus_register_shutdown_func (DBusShutdownFunction function,
337 dbus_bool_t _dbus_register_shutdown_func_unlocked (DBusShutdownFunction function,
340 extern int _dbus_current_generation;
342 /* The weird case convention is to avoid having to change all the callers,
343 * which would be quite a mega-patch. */
348 _DBUS_LOCK_connection_slots,
349 _DBUS_LOCK_pending_call_slots,
350 _DBUS_LOCK_server_slots,
351 _DBUS_LOCK_message_slots,
354 _DBUS_LOCK_bus_datas,
355 _DBUS_LOCK_shutdown_funcs,
356 _DBUS_LOCK_system_users,
357 _DBUS_LOCK_message_cache,
359 _DBUS_LOCK_shared_connections,
360 _DBUS_LOCK_machine_uuid,
366 dbus_bool_t _dbus_lock (DBusGlobalLock lock) _DBUS_GNUC_WARN_UNUSED_RESULT;
367 void _dbus_unlock (DBusGlobalLock lock);
369 #define _DBUS_LOCK_NAME(name) _DBUS_LOCK_##name
370 #define _DBUS_LOCK(name) _dbus_lock (_DBUS_LOCK_##name)
371 #define _DBUS_UNLOCK(name) _dbus_unlock (_DBUS_LOCK_##name)
374 dbus_bool_t _dbus_threads_init_debug (void);
376 dbus_bool_t _dbus_address_append_escaped (DBusString *escaped,
377 const DBusString *unescaped);
379 void _dbus_set_bad_address (DBusError *error,
380 const char *address_problem_type,
381 const char *address_problem_field,
382 const char *address_problem_other);
384 #define DBUS_UUID_LENGTH_BYTES 16
385 #define DBUS_UUID_LENGTH_WORDS (DBUS_UUID_LENGTH_BYTES / 4)
386 #define DBUS_UUID_LENGTH_HEX (DBUS_UUID_LENGTH_BYTES * 2)
389 * A globally unique ID ; we have one for each DBusServer, and also one for each
390 * machine with libdbus installed on it.
394 dbus_uint32_t as_uint32s[DBUS_UUID_LENGTH_WORDS]; /**< guid as four uint32 values */
395 char as_bytes[DBUS_UUID_LENGTH_BYTES]; /**< guid as 16 single-byte values */
398 DBUS_PRIVATE_EXPORT _DBUS_GNUC_WARN_UNUSED_RESULT
399 dbus_bool_t _dbus_generate_uuid (DBusGUID *uuid,
402 dbus_bool_t _dbus_uuid_encode (const DBusGUID *uuid,
403 DBusString *encoded);
404 dbus_bool_t _dbus_read_uuid_file (const DBusString *filename,
406 dbus_bool_t create_if_not_found,
409 dbus_bool_t _dbus_write_uuid_file (const DBusString *filename,
410 const DBusGUID *uuid,
413 dbus_bool_t _dbus_get_local_machine_uuid_encoded (DBusString *uuid_str,
416 #define _DBUS_PASTE2(a, b) a ## b
417 #define _DBUS_PASTE(a, b) _DBUS_PASTE2 (a, b)
418 #define _DBUS_STATIC_ASSERT(expr) \
419 typedef struct { char _assertion[(expr) ? 1 : -1]; } \
420 _DBUS_PASTE (_DBUS_STATIC_ASSERT_, __LINE__) _DBUS_GNUC_UNUSED
424 #endif /* DBUS_INTERNALS_H */