/*
- * Copyright (c) 1995, Index Data.
+ * Copyright (c) 1995-2000, 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 1.25 2001-06-26 14:11:27 adam
+ * Added MUTEX functions for NMEM module (used by OID utility).
+ *
+ * Revision 1.24 2000/05/11 14:37:55 adam
+ * Minor changes.
+ *
+ * Revision 1.23 2000/05/09 10:55:05 adam
+ * Public nmem_print_list (for debugging).
+ *
+ * Revision 1.22 2000/05/03 22:00:00 adam
+ * Reference counter (if multiple modules are init/freeing nmem).
+ *
+ * Revision 1.21 2000/02/29 13:44:55 adam
+ * Check for config.h (currently not generated).
+ *
+ * Revision 1.20 2000/01/06 14:59:13 adam
+ * Added oid_init/oid_exit. Changed oid_exit.
+ *
+ * Revision 1.19 1999/11/30 13:47:12 adam
+ * Improved installation. Moved header files to include/yaz.
+ *
+ * Revision 1.18 1999/08/27 09:40:32 adam
+ * Renamed logf function to yaz_log. Removed VC++ project files.
+ *
+ * Revision 1.17 1999/07/13 13:28:25 adam
+ * Better debugging for NMEM routines.
+ *
+ * Revision 1.16 1999/03/31 11:18:25 adam
+ * Implemented odr_strdup. Added Reference ID to backend server API.
+ *
+ * Revision 1.15 1999/02/11 09:10:26 adam
+ * Function nmem_init only mandatory on Windows.
+ *
+ * Revision 1.14 1999/02/02 13:57:40 adam
+ * Uses preprocessor define WIN32 instead of WINDOWS to build code
+ * for Microsoft WIN32.
+ *
+ * Revision 1.13 1998/10/19 15:24:21 adam
+ * New nmem utility, nmem_transfer, that transfer blocks from one
+ * NMEM to another.
+ *
+ * Revision 1.12 1998/10/13 16:00:18 adam
+ * Implemented nmem_critical_{enter,leave}.
+ *
+ * Revision 1.11 1998/08/21 14:13:36 adam
+ * Added GNU Configure script to build Makefiles.
+ *
+ * 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.
*
*
* This is a simple and fairly wasteful little module for nibble memory
* allocation. Evemtually we'll put in something better.
*/
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <string.h>
+#include <yaz/xmalloc.h>
+#include <yaz/nmem.h>
+#include <yaz/log.h>
+#ifdef WIN32
+#include <windows.h>
+#elif _REENTRANT
+
+#if HAVE_PTHREAD_H
+#include <pthread.h>
+#elif HAVE_THREAD_H
+#include <thread.h>
+#endif
+
+#endif
+
+#define NMEM_CHUNK (4*1024)
-#include <xmalloc.h>
-#include <nmem.h>
+#ifdef WIN32
+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 = PTHREAD_MUTEX_INITIALIZER;
+#define NMEM_ENTER pthread_mutex_lock(&nmem_mutex);
+#define NMEM_LEAVE pthread_mutex_unlock(&nmem_mutex);
+#else
+#define NMEM_ENTER
+#define NMEM_LEAVE
+#endif
-#define NMEM_CHUNK (10*1024)
-typedef struct nmem_block
+struct nmem_mutex {
+#ifdef WIN32
+ CRITICAL_SECTION m_handle;
+#elif _REENTRANT
+ pthread_mutex_t m_handle;
+#else
+ int m_handle;
+#endif
+};
+
+YAZ_EXPORT void nmem_mutex_create(NMEM_MUTEX *p)
{
- char *buf; /* memory allocated in this block */
- int size; /* size of buf */
- int top; /* top of buffer */
- struct nmem_block *next;
-} nmem_block;
+ NMEM_ENTER;
+ if (!*p)
+ {
+ *p = malloc (sizeof(**p));
+#ifdef WIN32
+ InitializeCriticalSection(&(*p)->m_handle);
+#elif _REENTRANT
+ pthread_mutex_init (&(*p)->m_handle, 0);
+#endif
+ }
+ NMEM_LEAVE;
+}
-typedef struct nmem_control
+YAZ_EXPORT void nmem_mutex_enter(NMEM_MUTEX p)
{
- int total;
- nmem_block *blocks;
-} nmem_control;
+ if (p)
+ {
+#ifdef WIN32
+ EnterCriticalSection(&p->m_handle);
+#elif _REENTRANT
+ pthread_mutex_lock(&p->m_handle);
+#endif
+ }
+}
-static nmem_block *freelist = 0; /* global freelist */
+YAZ_EXPORT void nmem_mutex_leave(NMEM_MUTEX p)
+{
+ if (p)
+ {
+#ifdef WIN32
+ LeaveCriticalSection(&p->m_handle);
+#elif _REENTRANT
+ pthread_mutex_unlock(&p->m_handle);
+#endif
+ }
+}
-static void free_block(nmem_block *p)
+YAZ_EXPORT void nmem_mutex_destroy(NMEM_MUTEX *p)
{
+ NMEM_ENTER;
+ if (*p)
+ {
+#ifdef WIN32
+ DeleteCriticalSection(&(*p)->m_handle);
+#endif
+ free (*p);
+ *p = 0;
+ }
+ NMEM_LEAVE;
+}
+
+static nmem_block *freelist = NULL; /* "global" freelists */
+static nmem_control *cfreelist = NULL;
+static int nmem_active_no = 0;
+static int nmem_init_flag = 0;
+
+#if NMEM_DEBUG
+struct nmem_debug_info {
+ void *p;
+ char file[40];
+ int line;
+ struct nmem_debug_info *next;
+};
+
+struct nmem_debug_info *nmem_debug_list = 0;
+#endif
+
+static void free_block(nmem_block *p)
+{
p->next = freelist;
freelist = p;
+#if NMEM_DEBUG
+ yaz_log (LOG_DEBUG, "nmem free_block p=%p", p);
+#endif
}
+#if NMEM_DEBUG
+void nmem_print_list (void)
+{
+ struct nmem_debug_info *p;
+
+ yaz_log (LOG_DEBUG, "nmem print list");
+ NMEM_ENTER;
+ for (p = nmem_debug_list; p; p = p->next)
+ yaz_log (LOG_DEBUG, " %s:%d p=%p size=%d", p->file, p->line, p->p,
+ nmem_total(p->p));
+ NMEM_LEAVE;
+}
+#endif
/*
* acquire a block with a minimum of size free bytes.
*/
{
nmem_block *r, *l;
+#if NMEM_DEBUG
+ yaz_log (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
+ yaz_log (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
+ yaz_log (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
+ yaz_log (LOG_DEBUG, "nmem_reset p=%p", n);
+#endif
if (!n)
return;
+ NMEM_ENTER;
while (n->blocks)
{
t = n->blocks;
free_block(t);
}
n->total = 0;
+ NMEM_LEAVE;
}
+#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
+ yaz_log (LOG_DEBUG, "%s:%d: nmem_malloc p=%p size=%d", file, line,
+ n, size);
+#endif
if (!n)
+ {
+ abort ();
return xmalloc(size);
+ }
+#ifdef WIN32
+ assert (nmem_init_flag);
+#endif
+ 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;
+#if NMEM_DEBUG
+ struct nmem_debug_info *debug_p;
+#endif
+ NMEM_ENTER;
+ nmem_active_no++;
+ r = cfreelist;
+ if (r)
+ cfreelist = cfreelist->next;
+ else
+ r = (nmem_control *)xmalloc(sizeof(*r));
+ NMEM_LEAVE;
+
+#if NMEM_DEBUG
+ yaz_log (LOG_DEBUG, "%s:%d: nmem_create %d p=%p", file, line,
+ nmem_active_no, r);
+#endif
r->blocks = 0;
r->total = 0;
+ r->next = 0;
+
+#if NMEM_DEBUG
+ for (debug_p = nmem_debug_list; debug_p; debug_p = debug_p->next)
+ if (debug_p->p == r)
+ {
+ yaz_log (LOG_FATAL, "multi used block in nmem");
+ abort ();
+ }
+ debug_p = xmalloc (sizeof(*debug_p));
+ strncpy (debug_p->file, file, sizeof(debug_p->file)-1);
+ debug_p->file[sizeof(debug_p->file)-1] = '\0';
+ debug_p->line = line;
+ debug_p->p = r;
+ debug_p->next = nmem_debug_list;
+ nmem_debug_list = debug_p;
+
+ nmem_print_list();
+#endif
return r;
}
+#if NMEM_DEBUG
+void nmem_destroy_f(const char *file, int line, NMEM n)
+#else
void nmem_destroy(NMEM n)
+#endif
{
+#if NMEM_DEBUG
+ struct nmem_debug_info **debug_p;
+ int ok = 0;
+#endif
if (!n)
return;
+
+#if NMEM_DEBUG
+ yaz_log (LOG_DEBUG, "%s:%d: nmem_destroy %d p=%p", file, line,
+ nmem_active_no-1, n);
+ NMEM_ENTER;
+ for (debug_p = &nmem_debug_list; *debug_p; debug_p = &(*debug_p)->next)
+ if ((*debug_p)->p == n)
+ {
+ struct nmem_debug_info *debug_save = *debug_p;
+ *debug_p = (*debug_p)->next;
+ xfree (debug_save);
+ ok = 1;
+ break;
+ }
+ NMEM_LEAVE;
+ nmem_print_list();
+ if (!ok)
+ {
+ yaz_log (LOG_WARN, "%s:%d destroying unallocated nmem block p=%p",
+ file, line, n);
+ return;
+ }
+#endif
nmem_reset(n);
- xfree(n);
+ NMEM_ENTER;
+ nmem_active_no--;
+ n->next = cfreelist;
+ cfreelist = n;
+ NMEM_LEAVE;
}
+
+void nmem_transfer (NMEM dst, NMEM src)
+{
+ nmem_block *t;
+ while ((t=src->blocks))
+ {
+ src->blocks = t->next;
+ t->next = dst->blocks;
+ dst->blocks = t;
+ }
+ dst->total += src->total;
+ src->total = 0;
+}
+
+void nmem_critical_enter (void)
+{
+ NMEM_ENTER;
+}
+
+void nmem_critical_leave (void)
+{
+ NMEM_LEAVE;
+}
+
+void nmem_init (void)
+{
+ if (++nmem_init_flag == 1)
+ {
+#ifdef WIN32
+ InitializeCriticalSection(&critical_section);
+#endif
+ nmem_active_no = 0;
+ freelist = NULL;
+ cfreelist = NULL;
+ }
+}
+
+void nmem_exit (void)
+{
+ if (--nmem_init_flag == 0)
+ {
+ 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 WIN32
+ DeleteCriticalSection(&critical_section);
+#endif
+ }
+}
+
projects / yaz-moved-to-github.git / blobdiff