Panda3D
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configVariableString.cxx
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1/**
2 * PANDA 3D SOFTWARE
3 * Copyright (c) Carnegie Mellon University. All rights reserved.
4 *
5 * All use of this software is subject to the terms of the revised BSD
6 * license. You should have received a copy of this license along
7 * with this source code in a file named "LICENSE."
8 *
9 * @file configVariableString.cxx
10 * @author drose
11 * @date 2004-10-20
12 */
13
15
16/**
17 * Refreshes the variable's cached value.
18 */
19void ConfigVariableString::
20reload_cache() {
21 // NB. MSVC doesn't guarantee that this mutex is initialized in a
22 // thread-safe manner. But chances are that the first time this is called
23 // is at static init time, when there is no risk of data races.
24 static MutexImpl lock;
25 lock.lock();
26
27 // We check again for cache validity since another thread may have beaten
28 // us to the punch while we were waiting for the lock.
29 if (!is_cache_valid(_local_modified)) {
30 _cache = get_string_value();
31 mark_cache_valid(_local_modified);
32 }
33
34 lock.unlock();
35}
const std::string & get_string_value() const
Returns the toplevel value of the variable, formatted as a string.
A fake mutex implementation for single-threaded applications that don't need any synchronization cont...
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.