/*
- * Copyright (c) 1995, Index Data.
+ * Copyright (c) 1995-1998, 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 1.10 1998-07-20 12:35:57 adam
+ * Added more memory diagnostics (when NMEM_DEBUG is 1).
+ *
+ * Revision 1.9 1998/07/07 15:49:01 adam
+ * Reduced chunk size.
+ *
+ * Revision 1.8 1998/07/03 14:21:27 adam
+ * Added critical sections for pthreads-library. Thanks to Ian Ibbotson,
+ * Fretwell Downing Informatics.
+ *
+ * Revision 1.7 1998/02/11 11:53:36 adam
+ * Changed code so that it compiles as C++.
+ *
+ * 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>
+#elif _REENTRANT
+#include <pthread.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;
+#define NMEM_CHUNK (4*1024)
-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)
+#elif _REENTRANT
+static pthread_mutex_t nmem_mutex;
+#define NMEM_ENTER pthread_mutex_lock(&nmem_mutex);
+#define NMEM_LEAVE pthread_mutex_unlock(&nmem_mutex);
+#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 NMEM_DEBUG
+ logf (LOG_DEBUG, "nmem free_block p=%p", p);
+#endif
}
/*
{
nmem_block *r, *l;
+#if NMEM_DEBUG
+ logf (LOG_DEBUG, "nmem get_block size=%d", size);
+#endif
for (r = freelist, l = 0; r; l = r, r = r->next)
if (r->size >= size)
break;
if (r)
+ {
+#if NMEM_DEBUG
+ logf (LOG_DEBUG, "nmem get_block found free block p=%p", r);
+#endif
if (l)
l->next = r->next;
else
freelist = r->next;
+ }
else
{
int get = NMEM_CHUNK;
if (get < size)
get = size;
- r = xmalloc(sizeof(*r));
- r->buf = xmalloc(r->size = get);
+#if NMEM_DEBUG
+ logf (LOG_DEBUG, "nmem get_block alloc new block size=%d", get);
+#endif
+ r = (nmem_block *)xmalloc(sizeof(*r));
+ r->buf = (char *)xmalloc(r->size = get);
}
r->top = 0;
return r;
{
nmem_block *t;
+#if NMEM_DEBUG
+ logf (LOG_DEBUG, "nmem_reset p=%p", n);
+#endif
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 NMEM_DEBUG
+void *nmem_malloc_f (const char *file, int line, NMEM n, int size)
+#else
void *nmem_malloc(NMEM n, int size)
+#endif
{
struct nmem_block *p;
char *r;
+#if NMEM_DEBUG
+ logf (LOG_DEBUG, "%s:%d: nmem_malloc p=%p size=%d", file, line,
+ n, size);
+#endif
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 = (nmem_control *)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
}
+
projects / yaz-moved-to-github.git / blobdiff