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diff --git a/libraries/luaproc/channel.h b/libraries/luaproc/channel.h
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+/***************************************************
+
+Copyright 2008 Alexandre Skyrme, Noemi Rodriguez, Roberto Ierusalimschy
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+*****************************************************
+
+[channel.h]
+
+****************************************************/
+
+#ifndef _CHANNEL_H_
+#define _CHANNEL_H_
+
+#include <pthread.h>
+
+#include "list.h"
+
+#define CHANNEL_MAX_NAME_LENGTH 255
+
+#define CHANNEL_DESTROYED 0
+
+/* message channel pointer type */
+typedef struct stchannel *channel;
+
+/* initialize channels */
+void channel_init( void );
+
+/* create new channel */
+channel channel_create( const char *cname );
+
+/* destroy a channel */
+int channel_destroy( channel chan, const char *chname ); 
+
+/* search for and return a channel with a given name */
+channel channel_search( const char *cname );
+
+/* return a channel's send queue */
+list channel_get_sendq( channel chan );
+
+/* return a channel's receive queue */
+list channel_get_recvq( channel chan );
+
+/* return a channel's mutex */
+pthread_mutex_t *channel_get_mutex( channel chan ); 
+
+/* return a channel's conditional variable */
+pthread_cond_t *channel_get_cond( channel chan ); 
+
+#endif