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| author | hunt <hunt> | 2005-04-07 21:48:47 +0000 |
|---|---|---|
| committer | hunt <hunt> | 2005-04-07 21:48:47 +0000 |
| commit | 655ee2825121e149a9976e562946892efb20aea1 (patch) | |
| tree | 91b9b4cc46aeee50e9d789689bea0b96e11ceba1 /runtime/docs/html/scbuf_8c-source.html | |
| parent | 3d4bc8bea6b45893bd4b49f44df26bd602b4cba5 (diff) | |
| download | systemtap-steved-655ee2825121e149a9976e562946892efb20aea1.tar.gz systemtap-steved-655ee2825121e149a9976e562946892efb20aea1.tar.xz systemtap-steved-655ee2825121e149a9976e562946892efb20aea1.zip | |
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Diffstat (limited to 'runtime/docs/html/scbuf_8c-source.html')
| -rw-r--r-- | runtime/docs/html/scbuf_8c-source.html | 103 |
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diff --git a/runtime/docs/html/scbuf_8c-source.html b/runtime/docs/html/scbuf_8c-source.html deleted file mode 100644 index ffdfaac7..00000000 --- a/runtime/docs/html/scbuf_8c-source.html +++ /dev/null @@ -1,103 +0,0 @@ -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> -<html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"> -<title>SystemTap: scbuf.c Source File</title> -<link href="doxygen.css" rel="stylesheet" type="text/css"> -</head><body> -<!-- Generated by Doxygen 1.4.1 --> -<div class="qindex"><a class="qindex" href="index.html">Main Page</a> | <a class="qindex" href="modules.html">Modules</a> | <a class="qindex" href="annotated.html">Data Structures</a> | <a class="qindex" href="dirs.html">Directories</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="functions.html">Data Fields</a> | <a class="qindex" href="globals.html">Globals</a> | <a class="qindex" href="pages.html">Related Pages</a></div> -<h1>scbuf.c</h1><div class="fragment"><pre class="fragment">00001 <span class="preprocessor">#ifndef _SCBUF_C_ </span><span class="comment">/* -*- linux-c -*- */</span> -00002 <span class="preprocessor">#define _SCBUF_C_</span> -00003 <span class="preprocessor"></span> -00004 <span class="preprocessor">#include <linux/config.h></span> -00005 <span class="comment"></span> -00006 <span class="comment">/** @file scbuf.c</span> -00007 <span class="comment"> * @addtogroup scbuf Scratch Buffer</span> -00008 <span class="comment"> * Scratch Buffer Functions.</span> -00009 <span class="comment"> * The scratch buffer is for collecting output before storing in a map,</span> -00010 <span class="comment"> * printing, etc. This is a per-cpu static buffer. It is necessary because </span> -00011 <span class="comment"> * of the limited stack space available in the kernel.</span> -00012 <span class="comment"> * @todo Need careful review of these to insure safety.</span> -00013 <span class="comment"> * @{</span> -00014 <span class="comment"> */</span> -00015 <span class="comment"></span> -00016 <span class="comment">/** Maximum size of buffer, not including terminating NULL */</span> -<a name="l00017"></a><a class="code" href="group__scbuf.html#ga6">00017</a> <span class="preprocessor">#define STP_BUF_LEN 8191</span> -00018 <span class="preprocessor"></span><span class="comment"></span> -00019 <span class="comment">/** Scratch buffer for printing, building strings, etc */</span> -00020 <span class="keyword">static</span> <span class="keywordtype">char</span> _stp_scbuf[NR_CPUS][<a class="code" href="group__scbuf.html#ga6">STP_BUF_LEN</a>+1]; -00021 <span class="keyword">static</span> <span class="keywordtype">int</span> _stp_scbuf_len[NR_CPUS]; -00022 <span class="comment"></span> -00023 <span class="comment">/** Sprint into the scratch buffer.</span> -00024 <span class="comment"> * Like printf, except output goes into a global scratch buffer</span> -00025 <span class="comment"> * which will contain the null-terminated output.</span> -00026 <span class="comment"> * Safe because overflowing the buffer is not allowed.</span> -00027 <span class="comment"> * Size is limited by length of scratch buffer, STP_BUF_LEN.</span> -00028 <span class="comment"> *</span> -00029 <span class="comment"> * @param fmt A printf-style format string followed by a </span> -00030 <span class="comment"> * variable number of args.</span> -00031 <span class="comment"> * @sa _stp_scbuf_clear</span> -00032 <span class="comment"> */</span> -00033 -<a name="l00034"></a><a class="code" href="group__scbuf.html#ga2">00034</a> <span class="keywordtype">void</span> <a class="code" href="group__scbuf.html#ga2">_stp_sprint</a> (<span class="keyword">const</span> <span class="keywordtype">char</span> *fmt, ...) -00035 { -00036 <span class="keywordtype">int</span> num; -00037 va_list args; -00038 <span class="keywordtype">int</span> cpu = smp_processor_id(); -00039 <span class="keywordtype">char</span> *buf = _stp_scbuf[cpu] + <a class="code" href="group__scbuf.html#ga6">STP_BUF_LEN</a> - _stp_scbuf_len[cpu]; -00040 va_start(args, fmt); -00041 num = vscnprintf(buf, _stp_scbuf_len[cpu], fmt, args); -00042 va_end(args); -00043 <span class="keywordflow">if</span> (num > 0) -00044 _stp_scbuf_len[cpu] -= num; -00045 } -00046 <span class="comment"></span> -00047 <span class="comment">/** Write a string into the scratch buffer.</span> -00048 <span class="comment"> * Copies a string into a global scratch buffer.</span> -00049 <span class="comment"> * Safe because overflowing the buffer is not allowed.</span> -00050 <span class="comment"> * Size is limited by length of scratch buffer, STP_BUF_LEN.</span> -00051 <span class="comment"> * This is more efficient than using _stp_sprint().</span> -00052 <span class="comment"> *</span> -00053 <span class="comment"> * @param str A string.</span> -00054 <span class="comment"> */</span> -00055 -<a name="l00056"></a><a class="code" href="group__scbuf.html#ga3">00056</a> <span class="keywordtype">void</span> <a class="code" href="group__scbuf.html#ga3">_stp_sprint_str</a> (<span class="keyword">const</span> <span class="keywordtype">char</span> *str) -00057 { -00058 <span class="keywordtype">int</span> cpu = smp_processor_id(); -00059 <span class="keywordtype">char</span> *buf = _stp_scbuf[cpu] + <a class="code" href="group__scbuf.html#ga6">STP_BUF_LEN</a> - _stp_scbuf_len[cpu]; -00060 <span class="keywordtype">int</span> num = strlen (str); -00061 <span class="keywordflow">if</span> (num > _stp_scbuf_len[cpu]) -00062 num = _stp_scbuf_len[cpu]; -00063 strncpy (buf, str, num); -00064 _stp_scbuf_len[cpu] -= num; -00065 } -00066 <span class="comment"></span> -00067 <span class="comment">/** Clear the scratch buffer.</span> -00068 <span class="comment"> * This function should be called before anything is written to </span> -00069 <span class="comment"> * the scratch buffer. Output will accumulate in the buffer</span> -00070 <span class="comment"> * until this function is called again. </span> -00071 <span class="comment"> * @returns A pointer to the buffer.</span> -00072 <span class="comment"> */</span> -00073 -<a name="l00074"></a><a class="code" href="group__scbuf.html#ga4">00074</a> <span class="keywordtype">char</span> *<a class="code" href="group__scbuf.html#ga4">_stp_scbuf_clear</a> (<span class="keywordtype">void</span>) -00075 { -00076 <span class="keywordtype">int</span> cpu = smp_processor_id(); -00077 _stp_scbuf_len[cpu] = <a class="code" href="group__scbuf.html#ga6">STP_BUF_LEN</a>; -00078 *_stp_scbuf[cpu] = 0; -00079 <span class="keywordflow">return</span> _stp_scbuf[cpu]; -00080 } -00081 <span class="comment"></span> -00082 <span class="comment">/** Get the current top of the scratch buffer.</span> -00083 <span class="comment"> * This returns the address of the location where</span> -00084 <span class="comment"> * data will be written next in the scratch buffer.</span> -00085 <span class="comment"> * @returns A pointer</span> -00086 <span class="comment"> */</span> -00087 -00088 <span class="keyword">static</span> <span class="keywordtype">char</span> *_stp_scbuf_cur (<span class="keywordtype">void</span>) -00089 { -00090 <span class="keywordtype">int</span> cpu = smp_processor_id(); -00091 <span class="keywordflow">return</span> _stp_scbuf[cpu] + <a class="code" href="group__scbuf.html#ga6">STP_BUF_LEN</a> - _stp_scbuf_len[cpu]; -00092 } -00093 <span class="comment"></span> -00094 <span class="comment">/** @} */</span> -00095 <span class="preprocessor">#endif </span><span class="comment">/* _SCBUF_C_ */</span> -</pre></div></body></html> |