1 files changed, 71 insertions, 0 deletions
diff --git a/queue.h b/queue.h
new file mode 100644
index 00000000..dd74faba
--- /dev/null
+++ b/queue.h
@@ -0,0 +1,71 @@
+/* Definition of the queue support module.
+ *
+ * Copyright 2008 Rainer Gerhards and Adiscon GmbH.
+ *
+ * This file is part of rsyslog.
+ *
+ * Rsyslog is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Rsyslog is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Rsyslog.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * A copy of the GPL can be found in the file "COPYING" in this distribution.
+ */
+
+#ifndef QUEUE_H_INCLUDED
+#define QUEUE_H_INCLUDED
+
+
+/* queue types */
+typedef enum {
+	QUEUETYPE_FIXED_ARRAY,	/* a simple queue made out of a fixed (initially malloced) array fast but memoryhog */
+	QUEUETYPE_LINKEDLIST,	/* linked list used as buffer, lower fixed memory overhead but slower */
+} queueTypes_t;
+
+/* the queue object */
+typedef struct {
+	queueTypes_t	qType;
+	int	iMaxQueSize;	/* how large can the queue grow? */
+	void** pUsr;		/* the queued user data structure */
+	/* synchronization variables */
+	pthread_mutex_t *mut;
+	pthread_cond_t *notFull, *notEmpty;
+	int full, empty;
+	/* end sync variables */
+	union {			/* different data elements based on queue type (qType) */
+		struct {
+			long head, tail;
+		} farray;
+	} tVars;
+} queue_t;
+
+/* this is the first approach to a queue, this time with static
+ * memory.
+ */
+typedef struct {
+	void** pbuf;
+	long head, tail;
+	int full, empty;
+	pthread_mutex_t *mut;
+	pthread_cond_t *notFull, *notEmpty;
+} msgQueue;
+
+/* prototypes */
+msgQueue *queueInit (void);
+void queueDelete (msgQueue *q);
+void queueAdd (msgQueue *q, void* in);
+void queueDel (msgQueue *q, void **out);
+
+/* go-away's */
+extern int iMainMsgQueueSize;
+extern msgQueue *pMsgQueue;
+
+#endif /* #ifndef QUEUE_H_INCLUDED */