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-rw-r--r--src/polypcore/queue.h40
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diff --git a/src/polypcore/queue.h b/src/polypcore/queue.h
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+++ b/src/polypcore/queue.h
@@ -0,0 +1,40 @@
+#ifndef fooqueuehfoo
+#define fooqueuehfoo
+
+/* $Id$ */
+
+/***
+ This file is part of polypaudio.
+
+ polypaudio is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 2.1 of the
+ License, or (at your option) any later version.
+
+ polypaudio 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with polypaudio; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ USA.
+***/
+
+typedef struct pa_queue pa_queue;
+
+/* A simple implementation of the abstract data type queue. Stores
+ * pointers as members. The memory has to be managed by the caller. */
+
+pa_queue* pa_queue_new(void);
+
+/* Free the queue and run the specified callback function for every remaining entry. The callback function may be NULL. */
+void pa_queue_free(pa_queue* q, void (*destroy)(void *p, void *userdata), void *userdata);
+
+void pa_queue_push(pa_queue *q, void *p);
+void* pa_queue_pop(pa_queue *q);
+
+int pa_queue_is_empty(pa_queue *q);
+
+#endif