2 * Copyright (c) 1995-2000, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.23 2000-05-09 10:55:05 adam
8 * Public nmem_print_list (for debugging).
10 * Revision 1.22 2000/05/03 22:00:00 adam
11 * Reference counter (if multiple modules are init/freeing nmem).
13 * Revision 1.21 2000/02/29 13:44:55 adam
14 * Check for config.h (currently not generated).
16 * Revision 1.20 2000/01/06 14:59:13 adam
17 * Added oid_init/oid_exit. Changed oid_exit.
19 * Revision 1.19 1999/11/30 13:47:12 adam
20 * Improved installation. Moved header files to include/yaz.
22 * Revision 1.18 1999/08/27 09:40:32 adam
23 * Renamed logf function to yaz_log. Removed VC++ project files.
25 * Revision 1.17 1999/07/13 13:28:25 adam
26 * Better debugging for NMEM routines.
28 * Revision 1.16 1999/03/31 11:18:25 adam
29 * Implemented odr_strdup. Added Reference ID to backend server API.
31 * Revision 1.15 1999/02/11 09:10:26 adam
32 * Function nmem_init only mandatory on Windows.
34 * Revision 1.14 1999/02/02 13:57:40 adam
35 * Uses preprocessor define WIN32 instead of WINDOWS to build code
36 * for Microsoft WIN32.
38 * Revision 1.13 1998/10/19 15:24:21 adam
39 * New nmem utility, nmem_transfer, that transfer blocks from one
42 * Revision 1.12 1998/10/13 16:00:18 adam
43 * Implemented nmem_critical_{enter,leave}.
45 * Revision 1.11 1998/08/21 14:13:36 adam
46 * Added GNU Configure script to build Makefiles.
48 * Revision 1.10 1998/07/20 12:35:57 adam
49 * Added more memory diagnostics (when NMEM_DEBUG is 1).
51 * Revision 1.9 1998/07/07 15:49:01 adam
54 * Revision 1.8 1998/07/03 14:21:27 adam
55 * Added critical sections for pthreads-library. Thanks to Ian Ibbotson,
56 * Fretwell Downing Informatics.
58 * Revision 1.7 1998/02/11 11:53:36 adam
59 * Changed code so that it compiles as C++.
61 * Revision 1.6 1997/10/31 12:20:09 adam
62 * Improved memory debugging for xmalloc/nmem.c. References to NMEM
63 * instead of ODR in n ESPEC-1 handling in source d1_espec.c.
64 * Bug fix: missing fclose in data1_read_espec1.
66 * Revision 1.5 1997/10/06 09:09:52 adam
67 * Function mmem_exit releases memory used by the freelists.
69 * Revision 1.4 1997/09/29 07:12:50 adam
70 * NMEM thread safe. NMEM must be initialized before use (sigh) -
71 * routine nmem_init/nmem_exit implemented.
73 * Revision 1.3 1997/07/21 12:47:38 adam
74 * Moved definition of nmem_control and nmem_block.
76 * Revision 1.2 1995/12/13 13:44:37 quinn
77 * Modified Data1-system to use nmem
79 * Revision 1.1 1995/11/13 09:27:52 quinn
80 * Fiddling with the variant stuff.
86 * This is a simple and fairly wasteful little module for nibble memory
87 * allocation. Evemtually we'll put in something better.
95 #include <yaz/xmalloc.h>
110 #define NMEM_CHUNK (4*1024)
113 static CRITICAL_SECTION critical_section;
114 #define NMEM_ENTER EnterCriticalSection(&critical_section)
115 #define NMEM_LEAVE LeaveCriticalSection(&critical_section)
117 static pthread_mutex_t nmem_mutex = PTHREAD_MUTEX_INITIALIZER;
118 #define NMEM_ENTER pthread_mutex_lock(&nmem_mutex);
119 #define NMEM_LEAVE pthread_mutex_unlock(&nmem_mutex);
125 static nmem_block *freelist = NULL; /* "global" freelists */
126 static nmem_control *cfreelist = NULL;
127 static int nmem_active_no = 0;
128 static int nmem_init_flag = 0;
131 struct nmem_debug_info {
135 struct nmem_debug_info *next;
138 struct nmem_debug_info *nmem_debug_list = 0;
141 static void free_block(nmem_block *p)
146 yaz_log (LOG_DEBUG, "nmem free_block p=%p", p);
151 void nmem_print_list (void)
153 struct nmem_debug_info *p;
155 yaz_log (LOG_DEBUG, "nmem print list");
157 for (p = nmem_debug_list; p; p = p->next)
158 yaz_log (LOG_LOG, " %s:%d p=%p size=%d", p->file, p->line, p->p,
164 * acquire a block with a minimum of size free bytes.
166 static nmem_block *get_block(int size)
171 yaz_log (LOG_DEBUG, "nmem get_block size=%d", size);
173 for (r = freelist, l = 0; r; l = r, r = r->next)
179 yaz_log (LOG_DEBUG, "nmem get_block found free block p=%p", r);
188 int get = NMEM_CHUNK;
193 yaz_log (LOG_DEBUG, "nmem get_block alloc new block size=%d", get);
195 r = (nmem_block *)xmalloc(sizeof(*r));
196 r->buf = (char *)xmalloc(r->size = get);
202 void nmem_reset(NMEM n)
207 yaz_log (LOG_DEBUG, "nmem_reset p=%p", n);
215 n->blocks = n->blocks->next;
223 void *nmem_malloc_f (const char *file, int line, NMEM n, int size)
225 void *nmem_malloc(NMEM n, int size)
228 struct nmem_block *p;
232 yaz_log (LOG_DEBUG, "%s:%d: nmem_malloc p=%p size=%d", file, line,
238 return xmalloc(size);
241 assert (nmem_init_flag);
245 if (!p || p->size - p->top < size)
253 p->top += (size + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
259 int nmem_total(NMEM n)
265 NMEM nmem_create_f(const char *file, int line)
267 NMEM nmem_create(void)
272 struct nmem_debug_info *debug_p;
279 cfreelist = cfreelist->next;
281 r = (nmem_control *)xmalloc(sizeof(*r));
285 yaz_log (LOG_DEBUG, "%s:%d: nmem_create %d p=%p", file, line,
293 for (debug_p = nmem_debug_list; debug_p; debug_p = debug_p->next)
296 yaz_log (LOG_FATAL, "multi used block in nmem");
299 debug_p = xmalloc (sizeof(*debug_p));
300 strncpy (debug_p->file, file, sizeof(debug_p->file)-1);
301 debug_p->file[sizeof(debug_p->file)-1] = '\0';
302 debug_p->line = line;
304 debug_p->next = nmem_debug_list;
305 nmem_debug_list = debug_p;
313 void nmem_destroy_f(const char *file, int line, NMEM n)
315 void nmem_destroy(NMEM n)
319 struct nmem_debug_info **debug_p;
326 yaz_log (LOG_DEBUG, "%s:%d: nmem_destroy %d p=%p", file, line,
327 nmem_active_no-1, n);
329 for (debug_p = &nmem_debug_list; *debug_p; debug_p = &(*debug_p)->next)
330 if ((*debug_p)->p == n)
332 struct nmem_debug_info *debug_save = *debug_p;
333 *debug_p = (*debug_p)->next;
342 yaz_log (LOG_WARN, "%s:%d destroying unallocated nmem block p=%p",
355 void nmem_transfer (NMEM dst, NMEM src)
358 while ((t=src->blocks))
360 src->blocks = t->next;
361 t->next = dst->blocks;
364 dst->total += src->total;
368 void nmem_critical_enter (void)
373 void nmem_critical_leave (void)
378 void nmem_init (void)
380 if (++nmem_init_flag == 1)
383 InitializeCriticalSection(&critical_section);
391 void nmem_exit (void)
393 if (--nmem_init_flag == 0)
397 struct nmem_block *fl = freelist;
398 freelist = freelist->next;
404 struct nmem_control *cfl = cfreelist;
405 cfreelist = cfreelist->next;
409 DeleteCriticalSection(&critical_section);