/*
- * Copyright (c) 1995, Index Data.
+ * Copyright (c) 1995-1997, Index Data.
* See the file LICENSE for details.
* Sebastian Hammer, Adam Dickmeiss
*
* $Log: nmem.c,v $
- * Revision 1.1 1995-11-13 09:27:52 quinn
+ * Revision 1.6 1997-10-31 12:20:09 adam
+ * Improved memory debugging for xmalloc/nmem.c. References to NMEM
+ * instead of ODR in n ESPEC-1 handling in source d1_espec.c.
+ * Bug fix: missing fclose in data1_read_espec1.
+ *
+ * Revision 1.5 1997/10/06 09:09:52 adam
+ * Function mmem_exit releases memory used by the freelists.
+ *
+ * Revision 1.4 1997/09/29 07:12:50 adam
+ * NMEM thread safe. NMEM must be initialized before use (sigh) -
+ * routine nmem_init/nmem_exit implemented.
+ *
+ * Revision 1.3 1997/07/21 12:47:38 adam
+ * Moved definition of nmem_control and nmem_block.
+ *
+ * Revision 1.2 1995/12/13 13:44:37 quinn
+ * Modified Data1-system to use nmem
+ *
+ * Revision 1.1 1995/11/13 09:27:52 quinn
* Fiddling with the variant stuff.
*
*
#include <xmalloc.h>
#include <nmem.h>
+#include <log.h>
+#ifdef WINDOWS
+#include <windows.h>
+#endif
#define NMEM_CHUNK (10*1024)
-typedef struct nmem_block
-{
- char *buf; /* memory allocated in this block */
- int size; /* size of buf */
- int top; /* top of buffer */
- struct nmem_block *next;
-} nmem_block;
-
-typedef struct nmem_control
-{
- int total;
- nmem_block *blocks;
-} nmem_control;
+#ifdef WINDOWS
+static CRITICAL_SECTION critical_section;
+#define NMEM_ENTER EnterCriticalSection(&critical_section)
+#define NMEM_LEAVE LeaveCriticalSection(&critical_section)
+#else
+#define NMEM_ENTER
+#define NMEM_LEAVE
+#endif
-static nmem_block *freelist = 0; /* global freelist */
+static nmem_block *freelist = NULL; /* "global" freelists */
+static nmem_control *cfreelist = NULL;
+static int nmem_active_no = 0;
static void free_block(nmem_block *p)
-{
+{
p->next = freelist;
freelist = p;
}
if (!n)
return;
+ NMEM_ENTER;
while (n->blocks)
{
t = n->blocks;
n->blocks = n->blocks->next;
free_block(t);
}
+ NMEM_LEAVE;
n->total = 0;
}
if (!n)
return xmalloc(size);
+ NMEM_ENTER;
p = n->blocks;
if (!p || p->size - p->top < size)
{
/* align size */
p->top += (size + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
n->total += size;
+ NMEM_LEAVE;
return r;
}
return n->total;
}
+#if NMEM_DEBUG
+NMEM nmem_create_f(const char *file, int line)
+#else
NMEM nmem_create(void)
+#endif
{
- NMEM r = xmalloc(sizeof(*r));
+ NMEM r;
+ NMEM_ENTER;
+ nmem_active_no++;
+ r = cfreelist;
+ if (r)
+ cfreelist = cfreelist->next;
+ else
+ r = xmalloc(sizeof(*r));
+ NMEM_LEAVE;
+
+#if NMEM_DEBUG
+ logf (LOG_DEBUG, "%s:%d: nmem_create %d p=%p", file, line,
+ nmem_active_no-1, r);
+#endif
r->blocks = 0;
r->total = 0;
+ r->next = 0;
return r;
}
+#if NMEM_DEBUG
+void nmem_destroy_f(const char *file, int line, NMEM n)
+#else
void nmem_destroy(NMEM n)
+#endif
{
if (!n)
return;
nmem_reset(n);
- xfree(n);
+ NMEM_ENTER;
+ nmem_active_no--;
+ n->next = cfreelist;
+ cfreelist = n;
+ NMEM_LEAVE;
+#if NMEM_DEBUG
+ logf (LOG_DEBUG, "%s:%d: nmem_destroy %d p=%p", file, line,
+ nmem_active_no, n);
+#endif
+}
+
+void nmem_init (void)
+{
+#ifdef WINDOWS
+ InitializeCriticalSection(&critical_section);
+#endif
+ nmem_active_no = 0;
+ freelist = NULL;
+ cfreelist = NULL;
+}
+
+void nmem_exit (void)
+{
+ while (freelist)
+ {
+ struct nmem_block *fl = freelist;
+ freelist = freelist->next;
+ xfree (fl->buf);
+ xfree (fl);
+ }
+ while (cfreelist)
+ {
+ struct nmem_control *cfl = cfreelist;
+ cfreelist = cfreelist->next;
+ xfree (cfl);
+ }
+#ifdef WINDOWS
+ DeleteCriticalSection(&critical_section);
+#endif
}
+