Merge another change from team/russell/events

This commit breaks out some logic from pbx.c into a simple API.  The hint
processing code had logic for taking the state from multiple devices and
turning that into the state for a single extension.  So, I broke this out
and made an API that lets you take multiple device states and determine
the aggregate device state.  I needed this for some core device state changes
to support distributed device state.


git-svn-id: http://svn.digium.com/svn/asterisk/trunk@121501 f38db490-d61c-443f-a65b-d21fe96a405b

1 files changed, 88 insertions, 0 deletions

diff --git a/main/devicestate.c b/main/devicestate.c
index bd9261306..85ac6492e 100644
--- a/main/devicestate.c
+++ b/main/devicestate.c
@@ -551,3 +551,91 @@ int ast_device_state_engine_init(void)
 
 	return 0;
 }
+
+void ast_devstate_aggregate_init(struct ast_devstate_aggregate *agg)
+{
+	memset(agg, 0, sizeof(*agg));
+
+	agg->all_unavail = 1;
+	agg->all_busy = 1;
+	agg->all_free = 1;
+	agg->all_on_hold = 1;
+}
+
+void ast_devstate_aggregate_add(struct ast_devstate_aggregate *agg, enum ast_device_state state)
+{
+	switch (state) {
+	case AST_DEVICE_NOT_INUSE:
+		agg->all_unavail = 0;
+		agg->all_busy = 0;
+		agg->all_on_hold = 0;
+		break;
+	case AST_DEVICE_INUSE:
+		agg->in_use = 1;
+		agg->all_busy = 0;
+		agg->all_unavail = 0;
+		agg->all_free = 0;
+		agg->all_on_hold = 0;
+		break;
+	case AST_DEVICE_RINGING:
+		agg->ring = 1;
+		agg->all_busy = 0;
+		agg->all_unavail = 0;
+		agg->all_free = 0;
+		agg->all_on_hold = 0;
+		break;
+	case AST_DEVICE_RINGINUSE:
+		agg->in_use = 1;
+		agg->ring = 1;
+		agg->all_busy = 0;
+		agg->all_unavail = 0;
+		agg->all_free = 0;
+		agg->all_on_hold = 0;
+		break;
+	case AST_DEVICE_ONHOLD:
+		agg->all_unavail = 0;
+		agg->all_free = 0;
+		break;
+	case AST_DEVICE_BUSY:
+		agg->all_unavail = 0;
+		agg->all_free = 0;
+		agg->all_on_hold = 0;
+		agg->busy = 1;
+		break;
+	case AST_DEVICE_UNAVAILABLE:
+	case AST_DEVICE_INVALID:
+		agg->all_busy = 0;
+		agg->all_free = 0;
+		agg->all_on_hold = 0;
+		break;
+	case AST_DEVICE_UNKNOWN:
+		break;
+	}
+}
+
+enum ast_device_state ast_devstate_aggregate_result(struct ast_devstate_aggregate *agg)
+{
+	if (agg->all_free)
+		return AST_DEVICE_NOT_INUSE;
+	
+	if (agg->all_on_hold)
+		return AST_DEVICE_ONHOLD;
+	
+	if (agg->all_busy)
+		return AST_DEVICE_BUSY;
+
+	if (agg->all_unavail)
+		return AST_DEVICE_UNAVAILABLE;
+	
+	if (agg->ring)
+		return agg->in_use ? AST_DEVICE_RINGINUSE : AST_DEVICE_RINGING;
+
+	if (agg->in_use)
+		return AST_DEVICE_INUSE;
+
+	if (agg->busy)
+		return AST_DEVICE_BUSY;
+	
+	return AST_DEVICE_NOT_INUSE;
+}
+