queue device state changes and handle them serially in a background thread

optimize device state related functions
add ast_get_channel_by_name_prefix to allow searching for matching channels in O(1) operation


git-svn-id: http://svn.digium.com/svn/asterisk/trunk@6062 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 9 insertions, 36 deletions

diff --git a/include/asterisk/channel.h b/include/asterisk/channel.h
index 817d3cc97..9380d7884 100755
--- a/include/asterisk/channel.h
+++ b/include/asterisk/channel.h
@@ -444,21 +444,6 @@ struct outgoing_helper {
 /*! Do not transmit voice data */
 #define AST_STATE_MUTE		(1 << 16)	
 
-/*! Device is valid but channel didn't know state */
-#define AST_DEVICE_UNKNOWN	0
-/*! Device is not used */
-#define AST_DEVICE_NOT_INUSE	1
-/*! Device is in use */
-#define AST_DEVICE_INUSE	2
-/*! Device is busy */
-#define AST_DEVICE_BUSY		3
-/*! Device is invalid */
-#define AST_DEVICE_INVALID	4
-/*! Device is unavailable */
-#define AST_DEVICE_UNAVAILABLE	5
-/*! Device is ringing */
-#define AST_DEVICE_RINGING	6
-
 /*! Create a channel structure */
 /*! Returns NULL on failure to allocate. New channels are 
 	by default set to the "default" context and
@@ -494,27 +479,6 @@ void  ast_channel_free(struct ast_channel *);
  */
 struct ast_channel *ast_request(const char *type, int format, void *data, int *status);
 
-/*! Search the Channels by Name */
-/*!
- * \param device like a dialstring
- * Search the Device in active channels by compare the channelname against 
- * the devicename. Compared are only the first chars to the first '-' char.
- * Returns an AST_DEVICE_UNKNOWN if no channel found or
- * AST_DEVICE_INUSE if a channel is found
- */
-int ast_parse_device_state(char *device);
-
-/*! Asks a channel for device state */
-/*!
- * \param device like a dialstring
- * Asks a channel for device state, data is  normaly a number from dialstring
- * used by the low level module
- * Trys the channel devicestate callback if not supported search in the
- * active channels list for the device.
- * Returns an AST_DEVICE_??? state -1 on failure
- */
-int ast_device_state(char *device);
-
 /*!
  * \param type type of channel to request
  * \param format requested channel format
@@ -545,6 +509,12 @@ int ast_channel_register(const struct ast_channel_tech *tech);
  */
 void ast_channel_unregister(const struct ast_channel_tech *tech);
 
+/*! Get a channel technology structure by name
+ * \param name name of technology to find
+ * \return a pointer to the structure, or NULL if no matching technology found
+ */
+const struct ast_channel_tech *ast_get_channel_tech(const char *name);
+
 /*! Hang up a channel  */
 /*! 
  * \param chan channel to hang up
@@ -759,6 +729,9 @@ struct ast_channel *ast_channel_walk_locked(const struct ast_channel *prev);
 /*! Get channel by name (locks channel) */
 struct ast_channel *ast_get_channel_by_name_locked(const char *chan);
 
+/*! Get channel by name prefix (locks channel) */
+struct ast_channel *ast_get_channel_by_name_prefix_locked(const char *name, const int namelen);
+
 /*! Waits for a digit */
 /*! 
  * \param c channel to wait for a digit on