2 * Copyright (c) 1995-2001, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.31 2001-10-24 12:24:43 adam
8 * WIN32 updates: ZOOM runs, nmem_init/nmem_exit called in DllMain.
10 * Revision 1.30 2001/10/05 13:55:17 adam
11 * Added defines YAZ_GNU_THREADS, YAZ_POSIX_THREADS in code and yaz-config
13 * Revision 1.29 2001/10/04 00:37:58 adam
14 * Fixes for GNU threads (not working yet).
16 * Revision 1.28 2001/10/03 23:55:18 adam
17 * GNU threads support.
19 * Revision 1.27 2001/09/27 12:09:18 adam
20 * Function nmem_exit calls oid_exit (when reference is 0).
22 * Revision 1.26 2001/07/19 19:51:42 adam
23 * Added typecasts to make C++ happy.
25 * Revision 1.25 2001/06/26 14:11:27 adam
26 * Added MUTEX functions for NMEM module (used by OID utility).
28 * Revision 1.24 2000/05/11 14:37:55 adam
31 * Revision 1.23 2000/05/09 10:55:05 adam
32 * Public nmem_print_list (for debugging).
34 * Revision 1.22 2000/05/03 22:00:00 adam
35 * Reference counter (if multiple modules are init/freeing nmem).
37 * Revision 1.21 2000/02/29 13:44:55 adam
38 * Check for config.h (currently not generated).
40 * Revision 1.20 2000/01/06 14:59:13 adam
41 * Added oid_init/oid_exit. Changed oid_exit.
43 * Revision 1.19 1999/11/30 13:47:12 adam
44 * Improved installation. Moved header files to include/yaz.
46 * Revision 1.18 1999/08/27 09:40:32 adam
47 * Renamed logf function to yaz_log. Removed VC++ project files.
49 * Revision 1.17 1999/07/13 13:28:25 adam
50 * Better debugging for NMEM routines.
52 * Revision 1.16 1999/03/31 11:18:25 adam
53 * Implemented odr_strdup. Added Reference ID to backend server API.
55 * Revision 1.15 1999/02/11 09:10:26 adam
56 * Function nmem_init only mandatory on Windows.
58 * Revision 1.14 1999/02/02 13:57:40 adam
59 * Uses preprocessor define WIN32 instead of WINDOWS to build code
60 * for Microsoft WIN32.
62 * Revision 1.13 1998/10/19 15:24:21 adam
63 * New nmem utility, nmem_transfer, that transfer blocks from one
66 * Revision 1.12 1998/10/13 16:00:18 adam
67 * Implemented nmem_critical_{enter,leave}.
69 * Revision 1.11 1998/08/21 14:13:36 adam
70 * Added GNU Configure script to build Makefiles.
72 * Revision 1.10 1998/07/20 12:35:57 adam
73 * Added more memory diagnostics (when NMEM_DEBUG is 1).
75 * Revision 1.9 1998/07/07 15:49:01 adam
78 * Revision 1.8 1998/07/03 14:21:27 adam
79 * Added critical sections for pthreads-library. Thanks to Ian Ibbotson,
80 * Fretwell Downing Informatics.
82 * Revision 1.7 1998/02/11 11:53:36 adam
83 * Changed code so that it compiles as C++.
85 * Revision 1.6 1997/10/31 12:20:09 adam
86 * Improved memory debugging for xmalloc/nmem.c. References to NMEM
87 * instead of ODR in n ESPEC-1 handling in source d1_espec.c.
88 * Bug fix: missing fclose in data1_read_espec1.
90 * Revision 1.5 1997/10/06 09:09:52 adam
91 * Function mmem_exit releases memory used by the freelists.
93 * Revision 1.4 1997/09/29 07:12:50 adam
94 * NMEM thread safe. NMEM must be initialized before use (sigh) -
95 * routine nmem_init/nmem_exit implemented.
97 * Revision 1.3 1997/07/21 12:47:38 adam
98 * Moved definition of nmem_control and nmem_block.
100 * Revision 1.2 1995/12/13 13:44:37 quinn
101 * Modified Data1-system to use nmem
103 * Revision 1.1 1995/11/13 09:27:52 quinn
104 * Fiddling with the variant stuff.
110 * This is a simple and fairly wasteful little module for nibble memory
111 * allocation. Evemtually we'll put in something better.
119 #include <yaz/xmalloc.h>
120 #include <yaz/nmem.h>
128 #if YAZ_POSIX_THREADS
136 #define NMEM_CHUNK (4*1024)
139 static CRITICAL_SECTION critical_section;
140 #define NMEM_ENTER EnterCriticalSection(&critical_section)
141 #define NMEM_LEAVE LeaveCriticalSection(&critical_section)
143 CRITICAL_SECTION m_handle;
145 #elif YAZ_POSIX_THREADS
146 static pthread_mutex_t nmem_mutex = PTHREAD_MUTEX_INITIALIZER;
147 #define NMEM_ENTER pthread_mutex_lock(&nmem_mutex);
148 #define NMEM_LEAVE pthread_mutex_unlock(&nmem_mutex);
150 pthread_mutex_t m_handle;
152 #elif YAZ_GNU_THREADS
153 static pth_mutex_t nmem_mutex = PTH_MUTEX_INIT;
154 #define NMEM_ENTER pth_mutex_acquire(&nmem_mutex, 0, 0)
155 #define NMEM_LEAVE pth_mutex_release(&nmem_mutex)
157 pth_mutex_t m_handle;
167 YAZ_EXPORT void nmem_mutex_create(NMEM_MUTEX *p)
172 *p = (NMEM_MUTEX) malloc (sizeof(**p));
174 InitializeCriticalSection(&(*p)->m_handle);
175 #elif YAZ_POSIX_THREADS
176 pthread_mutex_init (&(*p)->m_handle, 0);
177 #elif YAZ_GNU_THREADS
178 pth_mutex_init (&(*p)->m_handle);
184 YAZ_EXPORT void nmem_mutex_enter(NMEM_MUTEX p)
189 EnterCriticalSection(&p->m_handle);
190 #elif YAZ_POSIX_THREADS
191 pthread_mutex_lock(&p->m_handle);
196 YAZ_EXPORT void nmem_mutex_leave(NMEM_MUTEX p)
201 LeaveCriticalSection(&p->m_handle);
202 #elif YAZ_POSIX_THREADS
203 pthread_mutex_unlock(&p->m_handle);
208 YAZ_EXPORT void nmem_mutex_destroy(NMEM_MUTEX *p)
214 DeleteCriticalSection(&(*p)->m_handle);
222 static nmem_block *freelist = NULL; /* "global" freelists */
223 static nmem_control *cfreelist = NULL;
224 static int nmem_active_no = 0;
225 static int nmem_init_flag = 0;
228 struct nmem_debug_info {
232 struct nmem_debug_info *next;
235 struct nmem_debug_info *nmem_debug_list = 0;
238 static void free_block(nmem_block *p)
243 yaz_log (LOG_DEBUG, "nmem free_block p=%p", p);
248 void nmem_print_list (void)
250 struct nmem_debug_info *p;
252 yaz_log (LOG_DEBUG, "nmem print list");
254 for (p = nmem_debug_list; p; p = p->next)
255 yaz_log (LOG_DEBUG, " %s:%d p=%p size=%d", p->file, p->line, p->p,
261 * acquire a block with a minimum of size free bytes.
263 static nmem_block *get_block(int size)
268 yaz_log (LOG_DEBUG, "nmem get_block size=%d", size);
270 for (r = freelist, l = 0; r; l = r, r = r->next)
276 yaz_log (LOG_DEBUG, "nmem get_block found free block p=%p", r);
285 int get = NMEM_CHUNK;
290 yaz_log (LOG_DEBUG, "nmem get_block alloc new block size=%d", get);
292 r = (nmem_block *)xmalloc(sizeof(*r));
293 r->buf = (char *)xmalloc(r->size = get);
299 void nmem_reset(NMEM n)
304 yaz_log (LOG_DEBUG, "nmem_reset p=%p", n);
312 n->blocks = n->blocks->next;
320 void *nmem_malloc_f (const char *file, int line, NMEM n, int size)
322 void *nmem_malloc(NMEM n, int size)
325 struct nmem_block *p;
329 yaz_log (LOG_DEBUG, "%s:%d: nmem_malloc p=%p size=%d", file, line,
335 return xmalloc(size);
338 assert (nmem_init_flag);
342 if (!p || p->size - p->top < size)
350 p->top += (size + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
356 int nmem_total(NMEM n)
362 NMEM nmem_create_f(const char *file, int line)
364 NMEM nmem_create(void)
369 struct nmem_debug_info *debug_p;
376 cfreelist = cfreelist->next;
378 r = (nmem_control *)xmalloc(sizeof(*r));
382 yaz_log (LOG_DEBUG, "%s:%d: nmem_create %d p=%p", file, line,
390 for (debug_p = nmem_debug_list; debug_p; debug_p = debug_p->next)
393 yaz_log (LOG_FATAL, "multi used block in nmem");
396 debug_p = xmalloc (sizeof(*debug_p));
397 strncpy (debug_p->file, file, sizeof(debug_p->file)-1);
398 debug_p->file[sizeof(debug_p->file)-1] = '\0';
399 debug_p->line = line;
401 debug_p->next = nmem_debug_list;
402 nmem_debug_list = debug_p;
410 void nmem_destroy_f(const char *file, int line, NMEM n)
412 void nmem_destroy(NMEM n)
416 struct nmem_debug_info **debug_p;
423 yaz_log (LOG_DEBUG, "%s:%d: nmem_destroy %d p=%p", file, line,
424 nmem_active_no-1, n);
426 for (debug_p = &nmem_debug_list; *debug_p; debug_p = &(*debug_p)->next)
427 if ((*debug_p)->p == n)
429 struct nmem_debug_info *debug_save = *debug_p;
430 *debug_p = (*debug_p)->next;
439 yaz_log (LOG_WARN, "%s:%d destroying unallocated nmem block p=%p",
452 void nmem_transfer (NMEM dst, NMEM src)
455 while ((t=src->blocks))
457 src->blocks = t->next;
458 t->next = dst->blocks;
461 dst->total += src->total;
465 void nmem_critical_enter (void)
470 void nmem_critical_leave (void)
475 void nmem_init (void)
477 if (++nmem_init_flag == 1)
480 InitializeCriticalSection(&critical_section);
481 #elif YAZ_GNU_THREADS
482 yaz_log (LOG_LOG, "pth_init");
491 void nmem_exit (void)
493 if (--nmem_init_flag == 0)
498 struct nmem_block *fl = freelist;
499 freelist = freelist->next;
505 struct nmem_control *cfl = cfreelist;
506 cfreelist = cfreelist->next;
510 DeleteCriticalSection(&critical_section);
517 BOOL WINAPI DllMain (HINSTANCE hinstDLL,
523 case DLL_PROCESS_ATTACH:
526 case DLL_PROCESS_DETACH: