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authorfriendica <info@friendica.com>2012-11-13 20:53:33 -0800
committerfriendica <info@friendica.com>2012-11-13 20:53:33 -0800
commit6ac5e048b3dc5206331186bab571e02f75c3454c (patch)
tree571e38a3849375e2d2f7c27bd3f3754c95648230 /include/lock.php
parentaa88165383b14c35114549334567f362e9c83e54 (diff)
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cleanup
Diffstat (limited to 'include/lock.php')
-rw-r--r--include/lock.php75
1 files changed, 0 insertions, 75 deletions
diff --git a/include/lock.php b/include/lock.php
deleted file mode 100644
index 707e33609..000000000
--- a/include/lock.php
+++ /dev/null
@@ -1,75 +0,0 @@
-<?php
-
-// Provide some ability to lock a PHP function so that multiple processes
-// can't run the function concurrently
-if(! function_exists('lock_function')) {
-function lock_function($fn_name, $block = true, $wait_sec = 2, $timeout = 30) {
- if( $wait_sec == 0 )
- $wait_sec = 2; // don't let the user pick a value that's likely to crash the system
-
- $got_lock = false;
- $start = time();
-
- do {
- q("LOCK TABLE locks WRITE");
- $r = q("SELECT locked FROM locks WHERE name = '%s' LIMIT 1",
- dbesc($fn_name)
- );
-
- if((count($r)) && (! $r[0]['locked'])) {
- q("UPDATE locks SET locked = 1 WHERE name = '%s' LIMIT 1",
- dbesc($fn_name)
- );
- $got_lock = true;
- }
- elseif(! $r) { // the Boolean value for count($r) should be equivalent to the Boolean value of $r
- q("INSERT INTO locks ( name, locked ) VALUES ( '%s', 1 )",
- dbesc($fn_name)
- );
- $got_lock = true;
- }
-
- q("UNLOCK TABLES");
-
- if(($block) && (! $got_lock))
- sleep($wait_sec);
-
- } while(($block) && (! $got_lock) && ((time() - $start) < $timeout));
-
- logger('lock_function: function ' . $fn_name . ' with blocking = ' . $block . ' got_lock = ' . $got_lock . ' time = ' . (time() - $start), LOGGER_DEBUG);
-
- return $got_lock;
-}}
-
-
-if(! function_exists('block_on_function_lock')) {
-function block_on_function_lock($fn_name, $wait_sec = 2, $timeout = 30) {
- if( $wait_sec == 0 )
- $wait_sec = 2; // don't let the user pick a value that's likely to crash the system
-
- $start = time();
-
- do {
- $r = q("SELECT locked FROM locks WHERE name = '%s' LIMIT 1",
- dbesc($fn_name)
- );
-
- if(count($r) && $r[0]['locked'])
- sleep($wait_sec);
-
- } while(count($r) && $r[0]['locked'] && ((time() - $start) < $timeout));
-
- return;
-}}
-
-
-if(! function_exists('unlock_function')) {
-function unlock_function($fn_name) {
- $r = q("UPDATE locks SET locked = 0 WHERE name = '%s' LIMIT 1",
- dbesc($fn_name)
- );
-
- logger('unlock_function: released lock for function ' . $fn_name, LOGGER_DEBUG);
-
- return;
-}}