2 * Copyright (c) 1995-1997, Index Data.
3 * See the file LICENSE for details.
4 * Sebastian Hammer, Adam Dickmeiss
7 * Revision 1.6 1997-10-31 12:20:09 adam
8 * Improved memory debugging for xmalloc/nmem.c. References to NMEM
9 * instead of ODR in n ESPEC-1 handling in source d1_espec.c.
10 * Bug fix: missing fclose in data1_read_espec1.
12 * Revision 1.5 1997/10/06 09:09:52 adam
13 * Function mmem_exit releases memory used by the freelists.
15 * Revision 1.4 1997/09/29 07:12:50 adam
16 * NMEM thread safe. NMEM must be initialized before use (sigh) -
17 * routine nmem_init/nmem_exit implemented.
19 * Revision 1.3 1997/07/21 12:47:38 adam
20 * Moved definition of nmem_control and nmem_block.
22 * Revision 1.2 1995/12/13 13:44:37 quinn
23 * Modified Data1-system to use nmem
25 * Revision 1.1 1995/11/13 09:27:52 quinn
26 * Fiddling with the variant stuff.
32 * This is a simple and fairly wasteful little module for nibble memory
33 * allocation. Evemtually we'll put in something better.
43 #define NMEM_CHUNK (10*1024)
46 static CRITICAL_SECTION critical_section;
47 #define NMEM_ENTER EnterCriticalSection(&critical_section)
48 #define NMEM_LEAVE LeaveCriticalSection(&critical_section)
54 static nmem_block *freelist = NULL; /* "global" freelists */
55 static nmem_control *cfreelist = NULL;
56 static int nmem_active_no = 0;
58 static void free_block(nmem_block *p)
65 * acquire a block with a minimum of size free bytes.
67 static nmem_block *get_block(int size)
71 for (r = freelist, l = 0; r; l = r, r = r->next)
85 r = xmalloc(sizeof(*r));
86 r->buf = xmalloc(r->size = get);
92 void nmem_reset(NMEM n)
102 n->blocks = n->blocks->next;
109 void *nmem_malloc(NMEM n, int size)
111 struct nmem_block *p;
115 return xmalloc(size);
118 if (!p || p->size - p->top < size)
126 p->top += (size + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
132 int nmem_total(NMEM n)
138 NMEM nmem_create_f(const char *file, int line)
140 NMEM nmem_create(void)
149 cfreelist = cfreelist->next;
151 r = xmalloc(sizeof(*r));
155 logf (LOG_DEBUG, "%s:%d: nmem_create %d p=%p", file, line,
156 nmem_active_no-1, r);
165 void nmem_destroy_f(const char *file, int line, NMEM n)
167 void nmem_destroy(NMEM n)
179 logf (LOG_DEBUG, "%s:%d: nmem_destroy %d p=%p", file, line,
184 void nmem_init (void)
187 InitializeCriticalSection(&critical_section);
194 void nmem_exit (void)
198 struct nmem_block *fl = freelist;
199 freelist = freelist->next;
205 struct nmem_control *cfl = cfreelist;
206 cfreelist = cfreelist->next;
210 DeleteCriticalSection(&critical_section);