1 files changed, 75 insertions, 0 deletions
diff --git a/db2/os/os_alloc.c b/db2/os/os_alloc.c
new file mode 100644
index 0000000000..27abffbf0d
--- /dev/null
+++ b/db2/os/os_alloc.c
@@ -0,0 +1,75 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1997
+ *	Sleepycat Software.  All rights reserved.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)os_alloc.c	10.1 (Sleepycat) 12/1/97";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+
+#include <errno.h>
+#include <string.h>
+#endif
+
+#include "db_int.h"
+
+/*
+ * XXX
+ * Correct for systems that return NULL when you allocate 0 bytes of memory.
+ * There are several places in DB where we allocate the number of bytes held
+ * by the key/data item, and it can be 0.  Correct here so that malloc never
+ * returns a NULL for that reason (which behavior is permitted by ANSI).  We
+ * could make these calls macros on non-Alpha architectures (that's where we
+ * saw the problem), but it's probably not worth the autoconf complexity.
+ */
+/*
+ * __db_calloc --
+ *	The calloc(3) function for DB.
+ *
+ * PUBLIC: void *__db_calloc __P((size_t, size_t));
+ */
+void *
+__db_calloc(num, size)
+	size_t num, size;
+{
+	void *p;
+
+	size *= num;
+	if ((p = __db_jump.db_malloc(size == 0 ? 1 : size)) != NULL)
+		memset(p, 0, size);
+	return (p);
+}
+
+/*
+ * __db_malloc --
+ *	The malloc(3) function for DB.
+ *
+ * PUBLIC: void *__db_malloc __P((size_t));
+ */
+void *
+__db_malloc(size)
+	size_t size;
+{
+	return (__db_jump.db_malloc(size == 0 ? 1 : size));
+}
+
+/*
+ * __db_realloc --
+ *	The realloc(3) function for DB.
+ *
+ * PUBLIC: void *__db_realloc __P((void *, size_t));
+ */
+void *
+__db_realloc(ptr, size)
+	void *ptr;
+	size_t size;
+{
+	return (__db_jump.db_realloc(ptr, size == 0 ? 1 : size));
+}