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Add some documentation detailing an aspect of dialplan functions, as requested by Russell

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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@77838 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Tilghman Lesher
2007-07-31 18:50:06 +00:00
parent ce26bea24a
commit 3257acb922
2 changed files with 7 additions and 2 deletions
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4
CHANGES
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@@ -33,6 +33,10 @@ Dialplan functions
* MailboxExists converted to dialplan function * MailboxExists converted to dialplan function
* A new option to Dial() for telling IP phones not to count the call * A new option to Dial() for telling IP phones not to count the call
as "missed" when dial times out and cancels. as "missed" when dial times out and cancels.
* Added LOCK(), TRYLOCK(), and UNLOCK(), which provide a single level dialplan
mutex. No deadlocks are possible, as LOCK() only allows a single lock to be
held for any given channel. Also, locks are automatically freed when a
channel is hung up.
CLI Changes CLI Changes
----------- -----------

5
funcs/func_lock.c
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@@ -200,8 +200,9 @@ static struct ast_custom_function unlock_function = {
.name = "UNLOCK", .name = "UNLOCK",
.synopsis = "Unlocks a named mutex", .synopsis = "Unlocks a named mutex",
.desc = .desc =
"Unlocks a previously locked mutex. Returns 1 if the channel had a lock\n" "Unlocks a previously locked mutex. Note that it is generally unnecessary to\n"
"or 0 otherwise.\n", "unlock in a hangup routine, as any lock held is automatically freed when the\n"
"channel is destroyed. Returns 1 if the channel had a lock or 0 otherwise.\n",
.syntax = "UNLOCK()", .syntax = "UNLOCK()",
.read = unlock_read, .read = unlock_read,
}; };