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<hr><h1>dbus-memory.c</h1><div class="fragment"><pre>00001 <font class="comment">/* -*- mode: C; c-file-style: "gnu" -*- */</font>
00002 <font class="comment">/* dbus-memory.c D-BUS memory handling</font>
00003 <font class="comment"> *</font>
00004 <font class="comment"> * Copyright (C) 2002, 2003 Red Hat Inc.</font>
00005 <font class="comment"> *</font>
00006 <font class="comment"> * Licensed under the Academic Free License version 2.0</font>
00007 <font class="comment"> * </font>
00008 <font class="comment"> * This program is free software; you can redistribute it and/or modify</font>
00009 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00010 <font class="comment"> * the Free Software Foundation; either version 2 of the License, or</font>
00011 <font class="comment"> * (at your option) any later version.</font>
00012 <font class="comment"> *</font>
00013 <font class="comment"> * This program is distributed in the hope that it will be useful,</font>
00014 <font class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00015 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</font>
00016 <font class="comment"> * GNU General Public License for more details.</font>
00017 <font class="comment"> * </font>
00018 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00019 <font class="comment"> * along with this program; if not, write to the Free Software</font>
00020 <font class="comment"> * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</font>
00021 <font class="comment"> *</font>
00022 <font class="comment"> */</font>
00023
00024 <font class="preprocessor">#include "dbus-memory.h"</font>
00025 <font class="preprocessor">#include "dbus-internals.h"</font>
00026 <font class="preprocessor">#include "dbus-sysdeps.h"</font>
00027 <font class="preprocessor">#include "dbus-list.h"</font>
00028 <font class="preprocessor">#include <stdlib.h></font>
00029 <font class="comment">/* end of public API docs */</font>
00091
00098 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00099 <font class="preprocessor"></font><font class="keyword">static</font> dbus_bool_t debug_initialized = FALSE;
00100 <font class="keyword">static</font> <font class="keywordtype">int</font> fail_nth = -1;
00101 <font class="keyword">static</font> size_t fail_size = 0;
00102 <font class="keyword">static</font> <font class="keywordtype">int</font> fail_alloc_counter = _DBUS_INT_MAX;
00103 <font class="keyword">static</font> <font class="keywordtype">int</font> n_failures_per_failure = 1;
00104 <font class="keyword">static</font> <font class="keywordtype">int</font> n_failures_this_failure = 0;
00105 <font class="keyword">static</font> dbus_bool_t guards = FALSE;
00106 <font class="keyword">static</font> dbus_bool_t disable_mem_pools = FALSE;
00107 <font class="keyword">static</font> dbus_bool_t backtrace_on_fail_alloc = FALSE;
00108 <font class="keyword">static</font> <font class="keywordtype">int</font> n_blocks_outstanding = 0;
00109
<a name="l00111"></a><a class="code" href="group__DBusMemoryInternals.html#a26">00111</a> <font class="preprocessor">#define GUARD_VALUE 0xdeadbeef</font>
00112 <font class="preprocessor"></font>
<a name="l00113"></a><a class="code" href="group__DBusMemoryInternals.html#a27">00113</a> <font class="preprocessor">#define GUARD_INFO_SIZE 8</font>
00114 <font class="preprocessor"></font>
<a name="l00115"></a><a class="code" href="group__DBusMemoryInternals.html#a28">00115</a> <font class="preprocessor">#define GUARD_START_PAD 16</font>
00116 <font class="preprocessor"></font>
<a name="l00117"></a><a class="code" href="group__DBusMemoryInternals.html#a29">00117</a> <font class="preprocessor">#define GUARD_END_PAD 16</font>
00118 <font class="preprocessor"></font>
<a name="l00119"></a><a class="code" href="group__DBusMemoryInternals.html#a30">00119</a> <font class="preprocessor">#define GUARD_START_OFFSET (GUARD_START_PAD + GUARD_INFO_SIZE)</font>
00120 <font class="preprocessor"></font>
<a name="l00121"></a><a class="code" href="group__DBusMemoryInternals.html#a31">00121</a> <font class="preprocessor">#define GUARD_EXTRA_SIZE (GUARD_START_OFFSET + GUARD_END_PAD)</font>
00122 <font class="preprocessor"></font>
00123 <font class="keyword">static</font> <font class="keywordtype">void</font>
00124 _dbus_initialize_malloc_debug (<font class="keywordtype">void</font>)
00125 {
00126 <font class="keywordflow">if</font> (!debug_initialized)
00127 {
00128 debug_initialized = TRUE;
00129
00130 <font class="keywordflow">if</font> (_dbus_getenv (<font class="stringliteral">"DBUS_MALLOC_FAIL_NTH"</font>) != NULL)
00131 {
00132 fail_nth = atoi (_dbus_getenv (<font class="stringliteral">"DBUS_MALLOC_FAIL_NTH"</font>));
00133 fail_alloc_counter = fail_nth;
00134 _dbus_verbose (<font class="stringliteral">"Will fail malloc every %d times\n"</font>, fail_nth);
00135 }
00136
00137 <font class="keywordflow">if</font> (_dbus_getenv (<font class="stringliteral">"DBUS_MALLOC_FAIL_GREATER_THAN"</font>) != NULL)
00138 {
00139 fail_size = atoi (_dbus_getenv (<font class="stringliteral">"DBUS_MALLOC_FAIL_GREATER_THAN"</font>));
00140 _dbus_verbose (<font class="stringliteral">"Will fail mallocs over %d bytes\n"</font>,
00141 fail_size);
00142 }
00143
00144 <font class="keywordflow">if</font> (_dbus_getenv (<font class="stringliteral">"DBUS_MALLOC_GUARDS"</font>) != NULL)
00145 {
00146 guards = TRUE;
00147 _dbus_verbose (<font class="stringliteral">"Will use malloc guards\n"</font>);
00148 }
00149
00150 <font class="keywordflow">if</font> (_dbus_getenv (<font class="stringliteral">"DBUS_DISABLE_MEM_POOLS"</font>) != NULL)
00151 {
00152 disable_mem_pools = TRUE;
00153 _dbus_verbose (<font class="stringliteral">"Will disable memory pools\n"</font>);
00154 }
00155
00156 <font class="keywordflow">if</font> (_dbus_getenv (<font class="stringliteral">"DBUS_MALLOC_BACKTRACES"</font>) != NULL)
00157 {
00158 backtrace_on_fail_alloc = TRUE;
00159 _dbus_verbose (<font class="stringliteral">"Will backtrace on failing a malloc\n"</font>);
00160 }
00161 }
00162 }
00163
00169 dbus_bool_t
<a name="l00170"></a><a class="code" href="group__DBusMemoryInternals.html#a25">00170</a> _dbus_disable_mem_pools (<font class="keywordtype">void</font>)
00171 {
00172 _dbus_initialize_malloc_debug ();
00173 <font class="keywordflow">return</font> disable_mem_pools;
00174 }
00175
00184 <font class="keywordtype">void</font>
<a name="l00185"></a><a class="code" href="group__DBusMemoryInternals.html#a26">00185</a> _dbus_set_fail_alloc_counter (<font class="keywordtype">int</font> until_next_fail)
00186 {
00187 _dbus_initialize_malloc_debug ();
00188
00189 fail_alloc_counter = until_next_fail;
00190
00191 <font class="preprocessor">#if 0</font>
00192 <font class="preprocessor"></font> _dbus_verbose (<font class="stringliteral">"Set fail alloc counter = %d\n"</font>, fail_alloc_counter);
00193 <font class="preprocessor">#endif</font>
00194 <font class="preprocessor"></font>}
00195
00202 <font class="keywordtype">int</font>
<a name="l00203"></a><a class="code" href="group__DBusMemoryInternals.html#a27">00203</a> _dbus_get_fail_alloc_counter (<font class="keywordtype">void</font>)
00204 {
00205 _dbus_initialize_malloc_debug ();
00206
00207 <font class="keywordflow">return</font> fail_alloc_counter;
00208 }
00209
00216 <font class="keywordtype">void</font>
<a name="l00217"></a><a class="code" href="group__DBusMemoryInternals.html#a28">00217</a> _dbus_set_fail_alloc_failures (<font class="keywordtype">int</font> failures_per_failure)
00218 {
00219 n_failures_per_failure = failures_per_failure;
00220 }
00221
00228 <font class="keywordtype">int</font>
<a name="l00229"></a><a class="code" href="group__DBusMemoryInternals.html#a29">00229</a> _dbus_get_fail_alloc_failures (<font class="keywordtype">void</font>)
00230 {
00231 <font class="keywordflow">return</font> n_failures_per_failure;
00232 }
00233
00242 dbus_bool_t
<a name="l00243"></a><a class="code" href="group__DBusMemoryInternals.html#a30">00243</a> _dbus_decrement_fail_alloc_counter (<font class="keywordtype">void</font>)
00244 {
00245 _dbus_initialize_malloc_debug ();
00246
00247 <font class="keywordflow">if</font> (fail_alloc_counter <= 0)
00248 {
00249 <font class="keywordflow">if</font> (backtrace_on_fail_alloc)
00250 _dbus_print_backtrace ();
00251
00252 _dbus_verbose (<font class="stringliteral">"failure %d\n"</font>, n_failures_this_failure);
00253
00254 n_failures_this_failure += 1;
00255 <font class="keywordflow">if</font> (n_failures_this_failure >= n_failures_per_failure)
00256 {
00257 <font class="keywordflow">if</font> (fail_nth >= 0)
00258 fail_alloc_counter = fail_nth;
00259 <font class="keywordflow">else</font>
00260 fail_alloc_counter = _DBUS_INT_MAX;
00261
00262 n_failures_this_failure = 0;
00263
00264 _dbus_verbose (<font class="stringliteral">"reset fail alloc counter to %d\n"</font>, fail_alloc_counter);
00265 }
00266
00267 <font class="keywordflow">return</font> TRUE;
00268 }
00269 <font class="keywordflow">else</font>
00270 {
00271 fail_alloc_counter -= 1;
00272 <font class="keywordflow">return</font> FALSE;
00273 }
00274 }
00275
00281 <font class="keywordtype">int</font>
<a name="l00282"></a><a class="code" href="group__DBusMemoryInternals.html#a31">00282</a> _dbus_get_malloc_blocks_outstanding (<font class="keywordtype">void</font>)
00283 {
00284 <font class="keywordflow">return</font> n_blocks_outstanding;
00285 }
00286
<a name="l00290"></a><a class="code" href="group__DBusMemoryInternals.html#a32">00290</a> <font class="keyword">typedef</font> <font class="keyword">enum</font>
00291 {
00292 SOURCE_UNKNOWN,
00293 SOURCE_MALLOC,
00294 SOURCE_REALLOC,
00295 SOURCE_MALLOC_ZERO,
00296 SOURCE_REALLOC_NULL
00297 } BlockSource;
00298
00299 <font class="keyword">static</font> <font class="keyword">const</font> <font class="keywordtype">char</font>*
00300 source_string (BlockSource source)
00301 {
00302 <font class="keywordflow">switch</font> (source)
00303 {
00304 <font class="keywordflow">case</font> SOURCE_UNKNOWN:
00305 <font class="keywordflow">return</font> <font class="stringliteral">"unknown"</font>;
00306 <font class="keywordflow">case</font> SOURCE_MALLOC:
00307 <font class="keywordflow">return</font> <font class="stringliteral">"malloc"</font>;
00308 <font class="keywordflow">case</font> SOURCE_REALLOC:
00309 <font class="keywordflow">return</font> <font class="stringliteral">"realloc"</font>;
00310 <font class="keywordflow">case</font> SOURCE_MALLOC_ZERO:
00311 <font class="keywordflow">return</font> <font class="stringliteral">"malloc0"</font>;
00312 <font class="keywordflow">case</font> SOURCE_REALLOC_NULL:
00313 <font class="keywordflow">return</font> <font class="stringliteral">"realloc(NULL)"</font>;
00314 }
00315 _dbus_assert_not_reached (<font class="stringliteral">"Invalid malloc block source ID"</font>);
00316 <font class="keywordflow">return</font> <font class="stringliteral">"invalid!"</font>;
00317 }
00318
00319 <font class="keyword">static</font> <font class="keywordtype">void</font>
00320 check_guards (<font class="keywordtype">void</font> *free_block)
00321 {
00322 <font class="keywordflow">if</font> (free_block != NULL)
00323 {
00324 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> *block = ((<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font>*)free_block) - GUARD_START_OFFSET;
00325 size_t requested_bytes = *(dbus_uint32_t*)block;
00326 BlockSource source = *(dbus_uint32_t*)(block + 4);
00327 <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> i;
00328 dbus_bool_t failed;
00329
00330 failed = FALSE;
00331
00332 <font class="preprocessor">#if 0</font>
00333 <font class="preprocessor"></font> _dbus_verbose (<font class="stringliteral">"Checking %d bytes request from source %s\n"</font>,
00334 requested_bytes, source_string (source));
00335 <font class="preprocessor">#endif</font>
00336 <font class="preprocessor"></font>
00337 i = GUARD_INFO_SIZE;
00338 <font class="keywordflow">while</font> (i < GUARD_START_OFFSET)
00339 {
00340 dbus_uint32_t value = *(dbus_uint32_t*) &block[i];
00341 <font class="keywordflow">if</font> (value != GUARD_VALUE)
00342 {
00343 _dbus_warn (<font class="stringliteral">"Block of %u bytes from %s had start guard value 0x%x at %d expected 0x%x\n"</font>,
00344 requested_bytes, source_string (source),
00345 value, i, GUARD_VALUE);
00346 failed = TRUE;
00347 }
00348
00349 i += 4;
00350 }
00351
00352 i = GUARD_START_OFFSET + requested_bytes;
00353 <font class="keywordflow">while</font> (i < (GUARD_START_OFFSET + requested_bytes + GUARD_END_PAD))
00354 {
00355 dbus_uint32_t value = *(dbus_uint32_t*) &block[i];
00356 <font class="keywordflow">if</font> (value != GUARD_VALUE)
00357 {
00358 _dbus_warn (<font class="stringliteral">"Block of %u bytes from %s had end guard value 0x%x at %d expected 0x%x\n"</font>,
00359 requested_bytes, source_string (source),
00360 value, i, GUARD_VALUE);
00361 failed = TRUE;
00362 }
00363
00364 i += 4;
00365 }
00366
00367 <font class="keywordflow">if</font> (failed)
00368 _dbus_assert_not_reached (<font class="stringliteral">"guard value corruption"</font>);
00369 }
00370 }
00371
00372 <font class="keyword">static</font> <font class="keywordtype">void</font>*
00373 set_guards (<font class="keywordtype">void</font> *real_block,
00374 size_t requested_bytes,
00375 BlockSource source)
00376 {
00377 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> *block = real_block;
00378 <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> i;
00379
00380 <font class="keywordflow">if</font> (block == NULL)
00381 <font class="keywordflow">return</font> NULL;
00382
00383 _dbus_assert (GUARD_START_OFFSET + GUARD_END_PAD == GUARD_EXTRA_SIZE);
00384
00385 *((dbus_uint32_t*)block) = requested_bytes;
00386 *((dbus_uint32_t*)(block + 4)) = source;
00387
00388 i = GUARD_INFO_SIZE;
00389 <font class="keywordflow">while</font> (i < GUARD_START_OFFSET)
00390 {
00391 (*(dbus_uint32_t*) &block[i]) = GUARD_VALUE;
00392
00393 i += 4;
00394 }
00395
00396 i = GUARD_START_OFFSET + requested_bytes;
00397 <font class="keywordflow">while</font> (i < (GUARD_START_OFFSET + requested_bytes + GUARD_END_PAD))
00398 {
00399 (*(dbus_uint32_t*) &block[i]) = GUARD_VALUE;
00400
00401 i += 4;
00402 }
00403
00404 check_guards (block + GUARD_START_OFFSET);
00405
00406 <font class="keywordflow">return</font> block + GUARD_START_OFFSET;
00407 }
00408
00409 <font class="preprocessor">#endif</font>
00410 <font class="preprocessor"></font> <font class="comment">/* End of internals docs */</font>
00412
00413
00429 <font class="keywordtype">void</font>*
<a name="l00430"></a><a class="code" href="group__DBusMemory.html#a0">00430</a> dbus_malloc (size_t bytes)
00431 {
00432 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00433 <font class="preprocessor"></font> _dbus_initialize_malloc_debug ();
00434
00435 <font class="keywordflow">if</font> (_dbus_decrement_fail_alloc_counter ())
00436 {
00437 _dbus_verbose (<font class="stringliteral">" FAILING malloc of %d bytes\n"</font>, bytes);
00438
00439 <font class="keywordflow">return</font> NULL;
00440 }
00441 <font class="preprocessor">#endif</font>
00442 <font class="preprocessor"></font>
00443 <font class="keywordflow">if</font> (bytes == 0) <font class="comment">/* some system mallocs handle this, some don't */</font>
00444 <font class="keywordflow">return</font> NULL;
00445 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00446 <font class="preprocessor"></font> <font class="keywordflow">else</font> <font class="keywordflow">if</font> (fail_size != 0 && bytes > fail_size)
00447 <font class="keywordflow">return</font> NULL;
00448 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (guards)
00449 {
00450 <font class="keywordtype">void</font> *block;
00451
00452 block = malloc (bytes + GUARD_EXTRA_SIZE);
00453 <font class="keywordflow">if</font> (block)
00454 n_blocks_outstanding += 1;
00455
00456 <font class="keywordflow">return</font> set_guards (block, bytes, SOURCE_MALLOC);
00457 }
00458 <font class="preprocessor">#endif</font>
00459 <font class="preprocessor"></font> <font class="keywordflow">else</font>
00460 {
00461 <font class="keywordtype">void</font> *mem;
00462 mem = malloc (bytes);
00463 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00464 <font class="preprocessor"></font> <font class="keywordflow">if</font> (mem)
00465 n_blocks_outstanding += 1;
00466 <font class="preprocessor">#endif</font>
00467 <font class="preprocessor"></font> <font class="keywordflow">return</font> mem;
00468 }
00469 }
00470
00480 <font class="keywordtype">void</font>*
<a name="l00481"></a><a class="code" href="group__DBusMemory.html#a1">00481</a> dbus_malloc0 (size_t bytes)
00482 {
00483 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00484 <font class="preprocessor"></font> _dbus_initialize_malloc_debug ();
00485
00486 <font class="keywordflow">if</font> (_dbus_decrement_fail_alloc_counter ())
00487 {
00488 _dbus_verbose (<font class="stringliteral">" FAILING malloc0 of %d bytes\n"</font>, bytes);
00489
00490 <font class="keywordflow">return</font> NULL;
00491 }
00492 <font class="preprocessor">#endif</font>
00493 <font class="preprocessor"></font>
00494 <font class="keywordflow">if</font> (bytes == 0)
00495 <font class="keywordflow">return</font> NULL;
00496 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00497 <font class="preprocessor"></font> <font class="keywordflow">else</font> <font class="keywordflow">if</font> (fail_size != 0 && bytes > fail_size)
00498 <font class="keywordflow">return</font> NULL;
00499 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (guards)
00500 {
00501 <font class="keywordtype">void</font> *block;
00502
00503 block = calloc (bytes + GUARD_EXTRA_SIZE, 1);
00504 <font class="keywordflow">if</font> (block)
00505 n_blocks_outstanding += 1;
00506 <font class="keywordflow">return</font> set_guards (block, bytes, SOURCE_MALLOC_ZERO);
00507 }
00508 <font class="preprocessor">#endif</font>
00509 <font class="preprocessor"></font> <font class="keywordflow">else</font>
00510 {
00511 <font class="keywordtype">void</font> *mem;
00512 mem = calloc (bytes, 1);
00513 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00514 <font class="preprocessor"></font> <font class="keywordflow">if</font> (mem)
00515 n_blocks_outstanding += 1;
00516 <font class="preprocessor">#endif</font>
00517 <font class="preprocessor"></font> <font class="keywordflow">return</font> mem;
00518 }
00519 }
00520
00531 <font class="keywordtype">void</font>*
<a name="l00532"></a><a class="code" href="group__DBusMemory.html#a2">00532</a> dbus_realloc (<font class="keywordtype">void</font> *memory,
00533 size_t bytes)
00534 {
00535 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00536 <font class="preprocessor"></font> _dbus_initialize_malloc_debug ();
00537
00538 <font class="keywordflow">if</font> (_dbus_decrement_fail_alloc_counter ())
00539 {
00540 _dbus_verbose (<font class="stringliteral">" FAILING realloc of %d bytes\n"</font>, bytes);
00541
00542 <font class="keywordflow">return</font> NULL;
00543 }
00544 <font class="preprocessor">#endif</font>
00545 <font class="preprocessor"></font>
00546 <font class="keywordflow">if</font> (bytes == 0) <font class="comment">/* guarantee this is safe */</font>
00547 {
00548 dbus_free (memory);
00549 <font class="keywordflow">return</font> NULL;
00550 }
00551 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00552 <font class="preprocessor"></font> <font class="keywordflow">else</font> <font class="keywordflow">if</font> (fail_size != 0 && bytes > fail_size)
00553 <font class="keywordflow">return</font> NULL;
00554 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (guards)
00555 {
00556 <font class="keywordflow">if</font> (memory)
00557 {
00558 size_t old_bytes;
00559 <font class="keywordtype">void</font> *block;
00560
00561 check_guards (memory);
00562
00563 block = realloc (((<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font>*)memory) - GUARD_START_OFFSET,
00564 bytes + GUARD_EXTRA_SIZE);
00565
00566 old_bytes = *(dbus_uint32_t*)block;
00567 <font class="keywordflow">if</font> (block && bytes >= old_bytes)
00568 <font class="comment">/* old guards shouldn't have moved */</font>
00569 check_guards (((<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font>*)block) + GUARD_START_OFFSET);
00570
00571 <font class="keywordflow">return</font> set_guards (block, bytes, SOURCE_REALLOC);
00572 }
00573 <font class="keywordflow">else</font>
00574 {
00575 <font class="keywordtype">void</font> *block;
00576
00577 block = malloc (bytes + GUARD_EXTRA_SIZE);
00578
00579 <font class="keywordflow">if</font> (block)
00580 n_blocks_outstanding += 1;
00581
00582 <font class="keywordflow">return</font> set_guards (block, bytes, SOURCE_REALLOC_NULL);
00583 }
00584 }
00585 <font class="preprocessor">#endif</font>
00586 <font class="preprocessor"></font> <font class="keywordflow">else</font>
00587 {
00588 <font class="keywordtype">void</font> *mem;
00589 mem = realloc (memory, bytes);
00590 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00591 <font class="preprocessor"></font> <font class="keywordflow">if</font> (memory == NULL && mem != NULL)
00592 n_blocks_outstanding += 1;
00593 <font class="preprocessor">#endif</font>
00594 <font class="preprocessor"></font> <font class="keywordflow">return</font> mem;
00595 }
00596 }
00597
00604 <font class="keywordtype">void</font>
<a name="l00605"></a><a class="code" href="group__DBusMemory.html#a3">00605</a> dbus_free (<font class="keywordtype">void</font> *memory)
00606 {
00607 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00608 <font class="preprocessor"></font> <font class="keywordflow">if</font> (guards)
00609 {
00610 check_guards (memory);
00611 <font class="keywordflow">if</font> (memory)
00612 {
00613 n_blocks_outstanding -= 1;
00614
00615 _dbus_assert (n_blocks_outstanding >= 0);
00616
00617 free (((<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font>*)memory) - GUARD_START_OFFSET);
00618 }
00619
00620 <font class="keywordflow">return</font>;
00621 }
00622 <font class="preprocessor">#endif</font>
00623 <font class="preprocessor"></font>
00624 <font class="keywordflow">if</font> (memory) <font class="comment">/* we guarantee it's safe to free (NULL) */</font>
00625 {
00626 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00627 <font class="preprocessor"></font> n_blocks_outstanding -= 1;
00628
00629 _dbus_assert (n_blocks_outstanding >= 0);
00630 <font class="preprocessor">#endif</font>
00631 <font class="preprocessor"></font>
00632 free (memory);
00633 }
00634 }
00635
00642 <font class="keywordtype">void</font>
<a name="l00643"></a><a class="code" href="group__DBusMemory.html#a4">00643</a> dbus_free_string_array (<font class="keywordtype">char</font> **str_array)
00644 {
00645 <font class="keywordflow">if</font> (str_array)
00646 {
00647 <font class="keywordtype">int</font> i;
00648
00649 i = 0;
00650 <font class="keywordflow">while</font> (str_array[i])
00651 {
00652 dbus_free (str_array[i]);
00653 i++;
00654 }
00655
00656 dbus_free (str_array);
00657 }
00658 }
00659 <font class="comment">/* End of public API docs block */</font>
00661
00662
<a name="l00675"></a><a class="code" href="group__DBusMemoryInternals.html#a10">00675</a> <font class="keywordtype">int</font> _dbus_current_generation = 1;
00676
<a name="l00680"></a><a class="code" href="group__DBusMemoryInternals.html#a11">00680</a> <font class="keyword">typedef</font> <font class="keyword">struct </font><a class="code" href="structShutdownClosure.html">ShutdownClosure</a> ShutdownClosure;
00681
<a name="l00685"></a><a class="code" href="structShutdownClosure.html">00685</a> <font class="keyword">struct </font>ShutdownClosure
00686 {
<a name="l00687"></a><a class="code" href="structShutdownClosure.html#m0">00687</a> ShutdownClosure *<a class="code" href="structShutdownClosure.html#m0">next</a>;
<a name="l00688"></a><a class="code" href="structShutdownClosure.html#m1">00688</a> DBusShutdownFunction <a class="code" href="structShutdownClosure.html#m1">func</a>;
<a name="l00689"></a><a class="code" href="structShutdownClosure.html#m2">00689</a> <font class="keywordtype">void</font> *<a class="code" href="structShutdownClosure.html#m2">data</a>;
00690 };
00691
00692 _DBUS_DEFINE_GLOBAL_LOCK (shutdown_funcs);
00693 <font class="keyword">static</font> ShutdownClosure *registered_globals = NULL;
00694
00703 dbus_bool_t
<a name="l00704"></a><a class="code" href="group__DBusMemoryInternals.html#a40">00704</a> _dbus_register_shutdown_func (DBusShutdownFunction func,
00705 <font class="keywordtype">void</font> *data)
00706 {
00707 ShutdownClosure *c;
00708
00709 c = dbus_new (ShutdownClosure, 1);
00710
00711 <font class="keywordflow">if</font> (c == NULL)
00712 <font class="keywordflow">return</font> FALSE;
00713
00714 c-><a class="code" href="structShutdownClosure.html#m1">func</a> = func;
00715 c-><a class="code" href="structShutdownClosure.html#m2">data</a> = data;
00716
00717 _DBUS_LOCK (shutdown_funcs);
00718
00719 c-><a class="code" href="structShutdownClosure.html#m0">next</a> = registered_globals;
00720 registered_globals = c;
00721
00722 _DBUS_UNLOCK (shutdown_funcs);
00723
00724 <font class="keywordflow">return</font> TRUE;
00725 }
00726 <font class="comment">/* End of private API docs block */</font>
00728
00729
00748 <font class="keywordtype">void</font>
<a name="l00749"></a><a class="code" href="group__DBusMemory.html#a5">00749</a> dbus_shutdown (<font class="keywordtype">void</font>)
00750 {
00751 <font class="keywordflow">while</font> (registered_globals != NULL)
00752 {
00753 ShutdownClosure *c;
00754
00755 c = registered_globals;
00756 registered_globals = c-><a class="code" href="structShutdownClosure.html#m0">next</a>;
00757
00758 (* c-><a class="code" href="structShutdownClosure.html#m1">func</a>) (c-><a class="code" href="structShutdownClosure.html#m2">data</a>);
00759
00760 dbus_free (c);
00761 }
00762
00763 _dbus_current_generation += 1;
00764 }
00765
00768 <font class="preprocessor">#ifdef DBUS_BUILD_TESTS</font>
00769 <font class="preprocessor"></font><font class="preprocessor">#include "dbus-test.h"</font>
00770
00776 dbus_bool_t
<a name="l00777"></a><a class="code" href="group__DBusMemoryInternals.html#a25">00777</a> _dbus_memory_test (<font class="keywordtype">void</font>)
00778 {
00779 dbus_bool_t old_guards;
00780 <font class="keywordtype">void</font> *p;
00781 size_t size;
00782
00783 old_guards = guards;
00784 guards = TRUE;
00785 p = dbus_malloc (4);
00786 <font class="keywordflow">if</font> (p == NULL)
00787 _dbus_assert_not_reached (<font class="stringliteral">"no memory"</font>);
00788 <font class="keywordflow">for</font> (size = 4; size < 256; size += 4)
00789 {
00790 p = dbus_realloc (p, size);
00791 <font class="keywordflow">if</font> (p == NULL)
00792 _dbus_assert_not_reached (<font class="stringliteral">"no memory"</font>);
00793 }
00794 <font class="keywordflow">for</font> (size = 256; size != 0; size -= 4)
00795 {
00796 p = dbus_realloc (p, size);
00797 <font class="keywordflow">if</font> (p == NULL)
00798 _dbus_assert_not_reached (<font class="stringliteral">"no memory"</font>);
00799 }
00800 dbus_free (p);
00801 guards = old_guards;
00802 <font class="keywordflow">return</font> TRUE;
00803 }
00804
00805 <font class="preprocessor">#endif</font>
</pre></div><hr><address align="right"><small>Generated on Wed Jun 9 05:01:25 2004 for D-BUS by
<a href="http://www.doxygen.org/index.html">
<img src="doxygen.png" alt="doxygen" align="middle" border=0
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