summaryrefslogtreecommitdiff
path: root/libstdc++-v3/doc/html/manual/bk01pt03ch28s03.html
diff options
context:
space:
mode:
Diffstat (limited to 'libstdc++-v3/doc/html/manual/bk01pt03ch28s03.html')
-rw-r--r--libstdc++-v3/doc/html/manual/bk01pt03ch28s03.html36
1 files changed, 36 insertions, 0 deletions
diff --git a/libstdc++-v3/doc/html/manual/bk01pt03ch28s03.html b/libstdc++-v3/doc/html/manual/bk01pt03ch28s03.html
new file mode 100644
index 000000000..b70d5a621
--- /dev/null
+++ b/libstdc++-v3/doc/html/manual/bk01pt03ch28s03.html
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Use</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.76.1"/><meta name="keywords" content="&#10; ISO C++&#10; , &#10; library&#10; "/><meta name="keywords" content="&#10; ISO C++&#10; , &#10; library&#10; "/><link rel="home" href="../spine.html" title="The GNU C++ Library"/><link rel="up" href="ext_concurrency.html" title="Chapter 28. Concurrency"/><link rel="prev" href="bk01pt03ch28s02.html" title="Implementation"/><link rel="next" href="bk01pt04.html" title="Part IV.  Appendices"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Use</th></tr><tr><td align="left"><a accesskey="p" href="bk01pt03ch28s02.html">Prev</a> </td><th width="60%" align="center">Chapter 28. Concurrency</th><td align="right"> <a accesskey="n" href="bk01pt04.html">Next</a></td></tr></table><hr/></div><div class="section" title="Use"><div class="titlepage"><div><div><h2 class="title"><a id="manual.ext.concurrency.use"/>Use</h2></div></div></div><p>Typical usage of the last two constructs is demonstrated as follows:
+</p><pre class="programlisting">
+#include &lt;ext/concurrence.h&gt;
+
+namespace
+{
+ __gnu_cxx::__mutex safe_base_mutex;
+} // anonymous namespace
+
+namespace other
+{
+ void
+ foo()
+ {
+ __gnu_cxx::__scoped_lock sentry(safe_base_mutex);
+ for (int i = 0; i &lt; max; ++i)
+ {
+ _Safe_iterator_base* __old = __iter;
+ __iter = __iter-&lt;_M_next;
+ __old-&lt;_M_detach_single();
+ }
+}
+</pre><p>In this sample code, an anonymous namespace is used to keep
+the <code class="code">__mutex</code> private to the compilation unit,
+and <code class="code">__scoped_lock</code> is used to guard access to the critical
+section within the for loop, locking the mutex on creation and freeing
+the mutex as control moves out of this block.
+</p><p>Several exception classes are used to keep track of
+concurrence-related errors. These classes
+are: <code class="code">__concurrence_lock_error</code>, <code class="code">__concurrence_unlock_error</code>, <code class="code">__concurrence_wait_error</code>,
+and <code class="code">__concurrence_broadcast_error</code>.
+</p></div><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td align="left"><a accesskey="p" href="bk01pt03ch28s02.html">Prev</a> </td><td align="center"><a accesskey="u" href="ext_concurrency.html">Up</a></td><td align="right"> <a accesskey="n" href="bk01pt04.html">Next</a></td></tr><tr><td align="left" valign="top">Implementation </td><td align="center"><a accesskey="h" href="../spine.html">Home</a></td><td align="right" valign="top"> Part IV. 
+ Appendices
+</td></tr></table></div></body></html>