X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=blobdiff_plain;f=util%2Fnmem.c;h=5f55cee7acd9d003dfa3c46931c10434673a5cf9;hp=ea9a9b88a73c528b4820e7743ecf10592d7ff878;hb=a49837cbe6fcbeeb9ce857b0eeb942619ba80b5e;hpb=068a5a7412f492019b4d6f5e89158098d44368f7

diff --git a/util/nmem.c b/util/nmem.c
index ea9a9b8..5f55cee 100644
--- a/util/nmem.c
+++ b/util/nmem.c
@@ -1,10 +1,33 @@
 /*
- * Copyright (c) 1995-1997, Index Data.
+ * Copyright (c) 1995-1998, Index Data.
  * See the file LICENSE for details.
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: nmem.c,v $
- * Revision 1.6  1997-10-31 12:20:09  adam
+ * 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.
@@ -38,14 +61,26 @@
 #include <log.h>
 #ifdef WINDOWS
 #include <windows.h>
+#elif _REENTRANT
+
+#if HAVE_PTHREAD_H
+#include <pthread.h>
+#elif HAVE_THREAD_H
+#include <thread.h>
 #endif
 
-#define NMEM_CHUNK (10*1024)
+#endif
+
+#define NMEM_CHUNK (4*1024)
 
 #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 = 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
@@ -59,6 +94,9 @@ 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
 }
 
 /*
@@ -68,22 +106,33 @@ static nmem_block *get_block(int size)
 {
     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;
@@ -93,6 +142,9 @@ void nmem_reset(NMEM n)
 {
     nmem_block *t;
 
+#if NMEM_DEBUG
+    logf (LOG_DEBUG, "nmem_reset p=%p", n);
+#endif
     if (!n)
 	return;
     NMEM_ENTER;
@@ -102,15 +154,23 @@ void nmem_reset(NMEM n)
 	n->blocks = n->blocks->next;
 	free_block(t);
     }
-    NMEM_LEAVE;
     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
+    logf (LOG_DEBUG, "%s:%d: nmem_malloc p=%p size=%d", file, line,
+                     n, size);
+#endif
     if (!n)
 	return xmalloc(size);
     NMEM_ENTER;
@@ -148,7 +208,7 @@ NMEM nmem_create(void)
     if (r)
 	cfreelist = cfreelist->next;
     else
-	r = xmalloc(sizeof(*r));
+	r = (nmem_control *)xmalloc(sizeof(*r));
     NMEM_LEAVE;
 
 #if NMEM_DEBUG
@@ -181,6 +241,29 @@ void nmem_destroy(NMEM n)
 #endif
 }
 
+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)
 {
 #ifdef WINDOWS