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diff --git a/bdb/docs/ref/build_unix/qnx.html b/bdb/docs/ref/build_unix/qnx.html deleted file mode 100644 index 29c90dc98cb..00000000000 --- a/bdb/docs/ref/build_unix/qnx.html +++ /dev/null @@ -1,58 +0,0 @@ -<!--$Id: qnx.so,v 11.5 2000/11/29 15:03:24 sue Exp $--> -<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.--> -<!--All rights reserved.--> -<html> -<head> -<title>Berkeley DB Reference Guide: QNX</title> -<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> -<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++"> -</head> -<body bgcolor=white> - <a name="2"><!--meow--></a> -<table><tr valign=top> -<td><h3><dl><dt>Berkeley DB Reference Guide:<dd>Building Berkeley DB for UNIX systems</dl></h3></td> -<td width="1%"><a href="../../ref/build_unix/osf1.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/build_unix/sco.html"><img src="../../images/next.gif" alt="Next"></a> -</td></tr></table> -<p> -<h1 align=center>QNX</h1> -<p><ol> -<p><li><b>To what versions of QNX has DB been ported?</b> -<p>Berkeley DB has been ported to the QNX Neutrino technology which is commonly -referred to as QNX RTP (Real-Time Platform). Berkeley DB has not been -ported to earlier versions of QNX, such as QNX 4.25. -<p><li><b>What is the impact of QNX's use of <b>shm_open</b>(2) for -shared memory regions?</b> -<p>QNX requires the use of the POSIX <b>shm_open</b>(2) and -<b>shm_unlink</b>(2) calls for shared memory regions that will later -be mapped into memory using <b>mmap</b>(2). QNX's implementation -of the shared memory functions requires that the name given must begin -with a slash, and that no other slash may appear in the name. -<p>In order to comply with those requirements and allow relative pathnames -to find the same environment, Berkeley DB uses only the last component of the -home directory path and the name of the shared memory file, separated -by a colon, as the name specified to the shared memory functions. For -example, if an application specifies a home directory of -<b>/home/db/DB_DIR</b>, Berkeley DB will use <b>/DB_DIR:__db.001</b> as -the name for the shared memory area argument to <b>shm_open</b>(2). -<p>The impact of this decision is that the last component of all -environment home directory pathnames on QNX must be unique with respect -to each other. Additionally, Berkeley DB requires that environments use home -directories for QNX in order to generate a reasonable entry in the -shared memory area. -<p><li><b>What are the implications of QNX's requirement to use -<b>shm_open</b>(2) in order to use <b>mmap</b>(2)?</b> -<p>QNX requires that files mapped with <b>mmap</b>(2) be opened using -<b>shm_open</b>(2). There are other places in addition to the -environment shared memory regions, where Berkeley DB tries to memory map files -if it can. -<p>The memory pool subsystem normally attempts to use <b>mmap</b>(2) -even when using private memory, as indicated by the <a href="../../api_c/env_open.html#DB_PRIVATE">DB_PRIVATE</a> -flag to <a href="../../api_c/env_open.html">DBENV->open</a>. In the case of QNX, if an application is -using private memory, Berkeley DB will not attempt to map the memory and will -instead use the local cache. -</ol> -<table><tr><td><br></td><td width="1%"><a href="../../ref/build_unix/osf1.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/build_unix/sco.html"><img src="../../images/next.gif" alt="Next"></a> -</td></tr></table> -<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font> -</body> -</html> |