Initial code using Drupal 6.38

includes/lock-install.inc

@@ -0,0 +1,62 @@
+<?php
+
+/**
+ * @file
+ * A stub lock implementation to be used during the installation
+ * process when database access is not yet available. Because Drupal's
+ * install system should never be running in more than on concurrant
+ * request, we can bypass any need for locking.
+ */
+
+/**
+ * Initialize the locking system.
+ */
+function lock_init() {
+}
+
+/**
+ * Acquire (or renew) a lock, but do not block if it fails.
+ *
+ * @return
+ *   TRUE if the lock was acquired, FALSE if it failed.
+ */
+function lock_acquire($name, $timeout = 30.0) {
+  return TRUE;
+}
+
+/**
+ * Check if lock acquired by a different process may be available.
+ *
+ * @return
+ *   TRUE if there is no lock or it was removed, FALSE otherwise.
+ */
+function lock_may_be_available($name) {
+  return TRUE;
+}
+
+/**
+ * Wait for a lock to be available.
+ *
+ * @return
+ *   TRUE if the lock holds, FALSE if it is available.
+ */
+function lock_wait($name, $delay = 30) {
+  return FALSE;
+}
+
+/**
+ * Release a lock previously acquired by lock_acquire().
+ *
+ * This will release the named lock if it is still held by the current request.
+ *
+ * @param $name
+ *   The name of the lock.
+ */
+function lock_release($name) {
+}
+
+/**
+ * Release all previously acquired locks.
+ */
+function lock_release_all($lock_id = NULL) {
+}