1 /**************************************************************
2 *
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 *
20 *************************************************************/
21
22
23
24 #include "rtl/alloc.h"
25 #include "alloc_impl.h"
26
27 #ifndef INCLUDED_STRING_H
28 #include <string.h>
29 #define INCLUDED_STRING_H
30 #endif
31
32 #if !defined(FORCE_SYSALLOC)
33
34 /* ================================================================= *
35 *
36 * custom allocator includes.
37 *
38 * ================================================================= */
39
40 #ifndef INCLUDED_STDIO_H
41 #include <stdio.h>
42 #define INCLUDED_STDIO_H
43 #endif
44 #include "internal/once.h"
45 #include "sal/macros.h"
46 #include "osl/diagnose.h"
47
48 /* ================================================================= *
49 *
50 * custom allocator internals.
51 *
52 * ================================================================= */
53
54 static const sal_Size g_alloc_sizes[] =
55 {
56 /* powers of 2**(1/4) */
57 4 * 4, 6 * 4,
58 4 * 8, 5 * 8, 6 * 8, 7 * 8,
59 4 * 16, 5 * 16, 6 * 16, 7 * 16,
60 4 * 32, 5 * 32, 6 * 32, 7 * 32,
61 4 * 64, 5 * 64, 6 * 64, 7 * 64,
62 4 * 128, 5 * 128, 6 * 128, 7 * 128,
63 4 * 256, 5 * 256, 6 * 256, 7 * 256,
64 4 * 512, 5 * 512, 6 * 512, 7 * 512,
65 4 * 1024, 5 * 1024, 6 * 1024, 7 * 1024,
66 4 * 2048, 5 * 2048, 6 * 2048, 7 * 2048,
67 4 * 4096
68 };
69
70 #define RTL_MEMORY_CACHED_LIMIT 4 * 4096
71 #define RTL_MEMORY_CACHED_SIZES (sizeof(g_alloc_sizes) / sizeof(g_alloc_sizes[0]))
72
73 static rtl_cache_type * g_alloc_caches[RTL_MEMORY_CACHED_SIZES] =
74 {
75 0,
76 };
77
78 #ifdef NEED_ALIGN16
79 #define RTL_MEMALIGN 16
80 #define RTL_MEMALIGN_SHIFT 4
81 #else
82 #define RTL_MEMALIGN 8
83 #define RTL_MEMALIGN_SHIFT 3
84 #endif
85
86 static rtl_cache_type * g_alloc_table[RTL_MEMORY_CACHED_LIMIT >> RTL_MEMALIGN_SHIFT] =
87 {
88 0,
89 };
90
91 static rtl_arena_type * gp_alloc_arena = NULL;
92
93 /* ================================================================= *
94 *
95 * custom allocator initialization / finalization.
96 *
97 * ================================================================= */
98
99 static void
rtl_memory_once_init(void)100 rtl_memory_once_init (void)
101 {
102 {
103 /* global memory arena */
104 OSL_ASSERT(gp_alloc_arena == NULL);
105
106 gp_alloc_arena = rtl_arena_create (
107 "rtl_alloc_arena",
108 2048, /* quantum */
109 0, /* w/o quantum caching */
110 0, /* default source */
111 rtl_arena_alloc,
112 rtl_arena_free,
113 0 /* flags */
114 );
115 OSL_ASSERT(gp_alloc_arena != NULL);
116 }
117 {
118 sal_Size size;
119 int i, n = RTL_MEMORY_CACHED_SIZES;
120
121 for (i = 0; i < n; i++)
122 {
123 char name[RTL_CACHE_NAME_LENGTH + 1];
124 (void) snprintf (name, sizeof(name), "rtl_alloc_%lu", g_alloc_sizes[i]);
125 g_alloc_caches[i] = rtl_cache_create (name, g_alloc_sizes[i], 0, NULL, NULL, NULL, NULL, NULL, 0);
126 }
127
128 size = RTL_MEMALIGN;
129 for (i = 0; i < n; i++)
130 {
131 while (size <= g_alloc_sizes[i])
132 {
133 g_alloc_table[(size - 1) >> RTL_MEMALIGN_SHIFT] = g_alloc_caches[i];
134 size += RTL_MEMALIGN;
135 }
136 }
137 }
138 }
139
140 static int
rtl_memory_init(void)141 rtl_memory_init (void)
142 {
143 static sal_once_type g_once = SAL_ONCE_INIT;
144 SAL_ONCE(&g_once, rtl_memory_once_init);
145 return (gp_alloc_arena != NULL);
146 }
147
148 /* ================================================================= */
149
150 /*
151 Issue http://udk.openoffice.org/issues/show_bug.cgi?id=92388
152
153 Mac OS X does not seem to support "__cxa__atexit", thus leading
154 to the situation that "__attribute__((destructor))__" functions
155 (in particular "rtl_{memory|cache|arena}_fini") become called
156 _before_ global C++ object d'tors.
157
158 Delegated the call to "rtl_memory_fini()" into a dummy C++ object,
159 see alloc_fini.cxx .
160 */
161 #if defined(__GNUC__) && !defined(MACOSX)
162 static void rtl_memory_fini (void) __attribute__((destructor));
163 #elif defined(__SUNPRO_C) || defined(__SUNPRO_CC)
164 #pragma fini(rtl_memory_fini)
165 static void rtl_memory_fini (void);
166 #endif /* __GNUC__ || __SUNPRO_C */
167
168 void
rtl_memory_fini(void)169 rtl_memory_fini (void)
170 {
171 int i, n;
172
173 /* clear g_alloc_table */
174 memset (g_alloc_table, 0, sizeof(g_alloc_table));
175
176 /* cleanup g_alloc_caches */
177 for (i = 0, n = RTL_MEMORY_CACHED_SIZES; i < n; i++)
178 {
179 if (g_alloc_caches[i] != NULL)
180 {
181 rtl_cache_destroy (g_alloc_caches[i]);
182 g_alloc_caches[i] = NULL;
183 }
184 }
185
186 /* cleanup gp_alloc_arena */
187 if (gp_alloc_arena != NULL)
188 {
189 rtl_arena_destroy (gp_alloc_arena);
190 gp_alloc_arena = NULL;
191 }
192 }
193
194 /* ================================================================= *
195 *
196 * custom allocator implemenation.
197 *
198 * ================================================================= */
199
200 void *
rtl_allocateMemory(sal_Size n)201 SAL_CALL rtl_allocateMemory (sal_Size n) SAL_THROW_EXTERN_C()
202 {
203 void * p = 0;
204 if (n > 0)
205 {
206 char * addr;
207 sal_Size size = RTL_MEMORY_ALIGN(n + RTL_MEMALIGN, RTL_MEMALIGN);
208
209 OSL_ASSERT(RTL_MEMALIGN >= sizeof(sal_Size));
210 if (n >= SAL_MAX_SIZE - (RTL_MEMALIGN + RTL_MEMALIGN - 1))
211 {
212 /* requested size too large for roundup alignment */
213 return 0;
214 }
215
216 try_alloc:
217 if (size <= RTL_MEMORY_CACHED_LIMIT)
218 addr = (char*)rtl_cache_alloc(g_alloc_table[(size - 1) >> RTL_MEMALIGN_SHIFT]);
219 else
220 addr = (char*)rtl_arena_alloc (gp_alloc_arena, &size);
221
222 if (addr != 0)
223 {
224 ((sal_Size*)(addr))[0] = size;
225 p = addr + RTL_MEMALIGN;
226 }
227 else if (gp_alloc_arena == 0)
228 {
229 if (rtl_memory_init())
230 {
231 /* try again */
232 goto try_alloc;
233 }
234 }
235 }
236 return (p);
237 }
238
239 /* ================================================================= */
240
rtl_freeMemory(void * p)241 void SAL_CALL rtl_freeMemory (void * p) SAL_THROW_EXTERN_C()
242 {
243 if (p != 0)
244 {
245 char * addr = (char*)(p) - RTL_MEMALIGN;
246 sal_Size size = ((sal_Size*)(addr))[0];
247
248 if (size <= RTL_MEMORY_CACHED_LIMIT)
249 rtl_cache_free(g_alloc_table[(size - 1) >> RTL_MEMALIGN_SHIFT], addr);
250 else
251 rtl_arena_free (gp_alloc_arena, addr, size);
252 }
253 }
254
255 /* ================================================================= */
256
rtl_reallocateMemory(void * p,sal_Size n)257 void * SAL_CALL rtl_reallocateMemory (void * p, sal_Size n) SAL_THROW_EXTERN_C()
258 {
259 if (n > 0)
260 {
261 if (p != 0)
262 {
263 void * p_old = p;
264 sal_Size n_old = ((sal_Size*)( (char*)(p) - RTL_MEMALIGN ))[0] - RTL_MEMALIGN;
265
266 p = rtl_allocateMemory (n);
267 if (p != 0)
268 {
269 memcpy (p, p_old, SAL_MIN(n, n_old));
270 rtl_freeMemory (p_old);
271 }
272 }
273 else
274 {
275 p = rtl_allocateMemory (n);
276 }
277 }
278 else if (p != 0)
279 {
280 rtl_freeMemory (p), p = 0;
281 }
282 return (p);
283 }
284
285 #else /* FORCE_SYSALLOC */
286
287 /* ================================================================= *
288 *
289 * system allocator includes.
290 *
291 * ================================================================= */
292
293 #ifndef INCLUDED_STDLIB_H
294 #include <stdlib.h>
295 #define INCLUDED_STDLIB_H
296 #endif
297
298 /* ================================================================= *
299 *
300 * system allocator implemenation.
301 *
302 * ================================================================= */
303
rtl_allocateMemory(sal_Size n)304 void * SAL_CALL rtl_allocateMemory (sal_Size n)
305 {
306 return malloc (n);
307 }
308
309 /* ================================================================= */
310
rtl_freeMemory(void * p)311 void SAL_CALL rtl_freeMemory (void * p)
312 {
313 free (p);
314 }
315
316 /* ================================================================= */
317
rtl_reallocateMemory(void * p,sal_Size n)318 void * SAL_CALL rtl_reallocateMemory (void * p, sal_Size n)
319 {
320 return realloc (p, n);
321 }
322
323 /* ================================================================= */
324
325 void
rtl_memory_fini(void)326 rtl_memory_fini (void)
327 {
328 /* nothing to do */
329 }
330
331 #endif /* FORCE_SYSALLOC */
332
333 /* ================================================================= *
334 *
335 * rtl_(allocate|free)ZeroMemory() implemenation.
336 *
337 * ================================================================= */
338
rtl_allocateZeroMemory(sal_Size n)339 void * SAL_CALL rtl_allocateZeroMemory (sal_Size n) SAL_THROW_EXTERN_C()
340 {
341 void * p = rtl_allocateMemory (n);
342 if (p != 0)
343 memset (p, 0, n);
344 return (p);
345 }
346
347 /* ================================================================= */
348
rtl_freeZeroMemory(void * p,sal_Size n)349 void SAL_CALL rtl_freeZeroMemory (void * p, sal_Size n) SAL_THROW_EXTERN_C()
350 {
351 if (p != 0)
352 {
353 memset (p, 0, n);
354 rtl_freeMemory (p);
355 }
356 }
357
358 /* ================================================================= */
359