2 * Copyright (c) 1995-2001, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.32 2001-11-13 23:00:43 adam
8 * Separate malloc debug library. Removal of ASN_COMPILED-#ifdefs.
10 * Revision 1.31 2001/10/24 12:24:43 adam
11 * WIN32 updates: ZOOM runs, nmem_init/nmem_exit called in DllMain.
13 * Revision 1.30 2001/10/05 13:55:17 adam
14 * Added defines YAZ_GNU_THREADS, YAZ_POSIX_THREADS in code and yaz-config
16 * Revision 1.29 2001/10/04 00:37:58 adam
17 * Fixes for GNU threads (not working yet).
19 * Revision 1.28 2001/10/03 23:55:18 adam
20 * GNU threads support.
22 * Revision 1.27 2001/09/27 12:09:18 adam
23 * Function nmem_exit calls oid_exit (when reference is 0).
25 * Revision 1.26 2001/07/19 19:51:42 adam
26 * Added typecasts to make C++ happy.
28 * Revision 1.25 2001/06/26 14:11:27 adam
29 * Added MUTEX functions for NMEM module (used by OID utility).
31 * Revision 1.24 2000/05/11 14:37:55 adam
34 * Revision 1.23 2000/05/09 10:55:05 adam
35 * Public nmem_print_list (for debugging).
37 * Revision 1.22 2000/05/03 22:00:00 adam
38 * Reference counter (if multiple modules are init/freeing nmem).
40 * Revision 1.21 2000/02/29 13:44:55 adam
41 * Check for config.h (currently not generated).
43 * Revision 1.20 2000/01/06 14:59:13 adam
44 * Added oid_init/oid_exit. Changed oid_exit.
46 * Revision 1.19 1999/11/30 13:47:12 adam
47 * Improved installation. Moved header files to include/yaz.
49 * Revision 1.18 1999/08/27 09:40:32 adam
50 * Renamed logf function to yaz_log. Removed VC++ project files.
52 * Revision 1.17 1999/07/13 13:28:25 adam
53 * Better debugging for NMEM routines.
55 * Revision 1.16 1999/03/31 11:18:25 adam
56 * Implemented odr_strdup. Added Reference ID to backend server API.
58 * Revision 1.15 1999/02/11 09:10:26 adam
59 * Function nmem_init only mandatory on Windows.
61 * Revision 1.14 1999/02/02 13:57:40 adam
62 * Uses preprocessor define WIN32 instead of WINDOWS to build code
63 * for Microsoft WIN32.
65 * Revision 1.13 1998/10/19 15:24:21 adam
66 * New nmem utility, nmem_transfer, that transfer blocks from one
69 * Revision 1.12 1998/10/13 16:00:18 adam
70 * Implemented nmem_critical_{enter,leave}.
72 * Revision 1.11 1998/08/21 14:13:36 adam
73 * Added GNU Configure script to build Makefiles.
75 * Revision 1.10 1998/07/20 12:35:57 adam
76 * Added more memory diagnostics (when NMEM_DEBUG is 1).
78 * Revision 1.9 1998/07/07 15:49:01 adam
81 * Revision 1.8 1998/07/03 14:21:27 adam
82 * Added critical sections for pthreads-library. Thanks to Ian Ibbotson,
83 * Fretwell Downing Informatics.
85 * Revision 1.7 1998/02/11 11:53:36 adam
86 * Changed code so that it compiles as C++.
88 * Revision 1.6 1997/10/31 12:20:09 adam
89 * Improved memory debugging for xmalloc/nmem.c. References to NMEM
90 * instead of ODR in n ESPEC-1 handling in source d1_espec.c.
91 * Bug fix: missing fclose in data1_read_espec1.
93 * Revision 1.5 1997/10/06 09:09:52 adam
94 * Function mmem_exit releases memory used by the freelists.
96 * Revision 1.4 1997/09/29 07:12:50 adam
97 * NMEM thread safe. NMEM must be initialized before use (sigh) -
98 * routine nmem_init/nmem_exit implemented.
100 * Revision 1.3 1997/07/21 12:47:38 adam
101 * Moved definition of nmem_control and nmem_block.
103 * Revision 1.2 1995/12/13 13:44:37 quinn
104 * Modified Data1-system to use nmem
106 * Revision 1.1 1995/11/13 09:27:52 quinn
107 * Fiddling with the variant stuff.
113 * This is a simple and fairly wasteful little module for nibble memory
114 * allocation. Evemtually we'll put in something better.
122 #include <yaz/xmalloc.h>
123 #include <yaz/nmem.h>
131 #if YAZ_POSIX_THREADS
139 #define NMEM_CHUNK (4*1024)
142 static CRITICAL_SECTION critical_section;
143 #define NMEM_ENTER EnterCriticalSection(&critical_section)
144 #define NMEM_LEAVE LeaveCriticalSection(&critical_section)
146 CRITICAL_SECTION m_handle;
148 #elif YAZ_POSIX_THREADS
149 static pthread_mutex_t nmem_mutex = PTHREAD_MUTEX_INITIALIZER;
150 #define NMEM_ENTER pthread_mutex_lock(&nmem_mutex);
151 #define NMEM_LEAVE pthread_mutex_unlock(&nmem_mutex);
153 pthread_mutex_t m_handle;
155 #elif YAZ_GNU_THREADS
156 static pth_mutex_t nmem_mutex = PTH_MUTEX_INIT;
157 #define NMEM_ENTER pth_mutex_acquire(&nmem_mutex, 0, 0)
158 #define NMEM_LEAVE pth_mutex_release(&nmem_mutex)
160 pth_mutex_t m_handle;
170 YAZ_EXPORT void nmem_mutex_create(NMEM_MUTEX *p)
175 *p = (NMEM_MUTEX) malloc (sizeof(**p));
177 InitializeCriticalSection(&(*p)->m_handle);
178 #elif YAZ_POSIX_THREADS
179 pthread_mutex_init (&(*p)->m_handle, 0);
180 #elif YAZ_GNU_THREADS
181 pth_mutex_init (&(*p)->m_handle);
187 YAZ_EXPORT void nmem_mutex_enter(NMEM_MUTEX p)
192 EnterCriticalSection(&p->m_handle);
193 #elif YAZ_POSIX_THREADS
194 pthread_mutex_lock(&p->m_handle);
199 YAZ_EXPORT void nmem_mutex_leave(NMEM_MUTEX p)
204 LeaveCriticalSection(&p->m_handle);
205 #elif YAZ_POSIX_THREADS
206 pthread_mutex_unlock(&p->m_handle);
211 YAZ_EXPORT void nmem_mutex_destroy(NMEM_MUTEX *p)
217 DeleteCriticalSection(&(*p)->m_handle);
225 static nmem_block *freelist = NULL; /* "global" freelists */
226 static nmem_control *cfreelist = NULL;
227 static int nmem_active_no = 0;
229 static int nmem_init_flag = 0;
231 static int nmem_init_flag = 1;
235 struct nmem_debug_info {
239 struct nmem_debug_info *next;
242 struct nmem_debug_info *nmem_debug_list = 0;
245 static void free_block(nmem_block *p)
250 yaz_log (LOG_DEBUG, "nmem free_block p=%p", p);
255 void nmem_print_list (void)
257 struct nmem_debug_info *p;
259 yaz_log (LOG_DEBUG, "nmem print list");
261 for (p = nmem_debug_list; p; p = p->next)
262 yaz_log (LOG_DEBUG, " %s:%d p=%p size=%d", p->file, p->line, p->p,
268 * acquire a block with a minimum of size free bytes.
270 static nmem_block *get_block(int size)
275 yaz_log (LOG_DEBUG, "nmem get_block size=%d", size);
277 for (r = freelist, l = 0; r; l = r, r = r->next)
283 yaz_log (LOG_DEBUG, "nmem get_block found free block p=%p", r);
292 int get = NMEM_CHUNK;
297 yaz_log (LOG_DEBUG, "nmem get_block alloc new block size=%d", get);
299 r = (nmem_block *)xmalloc(sizeof(*r));
300 r->buf = (char *)xmalloc(r->size = get);
306 void nmem_reset(NMEM n)
311 yaz_log (LOG_DEBUG, "nmem_reset p=%p", n);
319 n->blocks = n->blocks->next;
327 void *nmem_malloc_f (const char *file, int line, NMEM n, int size)
329 void *nmem_malloc(NMEM n, int size)
332 struct nmem_block *p;
336 yaz_log (LOG_DEBUG, "%s:%d: nmem_malloc p=%p size=%d", file, line,
342 return xmalloc(size);
345 assert (nmem_init_flag);
349 if (!p || p->size - p->top < size)
357 p->top += (size + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
363 int nmem_total(NMEM n)
369 NMEM nmem_create_f(const char *file, int line)
371 NMEM nmem_create(void)
376 struct nmem_debug_info *debug_p;
383 cfreelist = cfreelist->next;
385 r = (nmem_control *)xmalloc(sizeof(*r));
389 yaz_log (LOG_DEBUG, "%s:%d: nmem_create %d p=%p", file, line,
397 for (debug_p = nmem_debug_list; debug_p; debug_p = debug_p->next)
400 yaz_log (LOG_FATAL, "multi used block in nmem");
403 debug_p = xmalloc (sizeof(*debug_p));
404 strncpy (debug_p->file, file, sizeof(debug_p->file)-1);
405 debug_p->file[sizeof(debug_p->file)-1] = '\0';
406 debug_p->line = line;
408 debug_p->next = nmem_debug_list;
409 nmem_debug_list = debug_p;
417 void nmem_destroy_f(const char *file, int line, NMEM n)
419 void nmem_destroy(NMEM n)
423 struct nmem_debug_info **debug_p;
430 yaz_log (LOG_DEBUG, "%s:%d: nmem_destroy %d p=%p", file, line,
431 nmem_active_no-1, n);
433 for (debug_p = &nmem_debug_list; *debug_p; debug_p = &(*debug_p)->next)
434 if ((*debug_p)->p == n)
436 struct nmem_debug_info *debug_save = *debug_p;
437 *debug_p = (*debug_p)->next;
446 yaz_log (LOG_WARN, "%s:%d destroying unallocated nmem block p=%p",
459 void nmem_transfer (NMEM dst, NMEM src)
462 while ((t=src->blocks))
464 src->blocks = t->next;
465 t->next = dst->blocks;
468 dst->total += src->total;
472 void nmem_critical_enter (void)
477 void nmem_critical_leave (void)
482 void nmem_init (void)
484 if (++nmem_init_flag == 1)
487 InitializeCriticalSection(&critical_section);
488 #elif YAZ_GNU_THREADS
489 yaz_log (LOG_LOG, "pth_init");
498 void nmem_exit (void)
500 if (--nmem_init_flag == 0)
502 yaz_log (LOG_LOG, "nmem_exit .............");
506 struct nmem_block *fl = freelist;
507 freelist = freelist->next;
513 struct nmem_control *cfl = cfreelist;
514 cfreelist = cfreelist->next;
518 DeleteCriticalSection(&critical_section);
525 BOOL WINAPI DllMain (HINSTANCE hinstDLL,
531 case DLL_PROCESS_ATTACH:
534 case DLL_PROCESS_DETACH: