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| author | hunt <hunt> | 2005-03-29 18:07:58 +0000 |
|---|---|---|
| committer | hunt <hunt> | 2005-03-29 18:07:58 +0000 |
| commit | e32551b18f4560056d2d482f5e1505b1b98fa82a (patch) | |
| tree | 4e9e07a9b46a4fd5dea27732571cbb04c0ef5dee /runtime/docs/html/alloc_8c-source.html | |
| parent | 13b35bb112459702e7371ecc89d7deb789818a86 (diff) | |
| download | systemtap-steved-e32551b18f4560056d2d482f5e1505b1b98fa82a.tar.gz systemtap-steved-e32551b18f4560056d2d482f5e1505b1b98fa82a.tar.xz systemtap-steved-e32551b18f4560056d2d482f5e1505b1b98fa82a.zip | |
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diff --git a/runtime/docs/html/alloc_8c-source.html b/runtime/docs/html/alloc_8c-source.html new file mode 100644 index 00000000..34641788 --- /dev/null +++ b/runtime/docs/html/alloc_8c-source.html @@ -0,0 +1,101 @@ +<!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: alloc.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>alloc.c</h1><a href="alloc_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment">00001 <span class="preprocessor">#ifndef _ALLOC_C_</span> +00002 <span class="preprocessor"></span><span class="preprocessor">#define _ALLOC_C_</span> +00003 <span class="preprocessor"></span> +00004 <span class="comment">/* -*- linux-c -*- */</span><span class="comment"></span> +00005 <span class="comment">/** @file alloc.c</span> +00006 <span class="comment"> * @brief Memory functions.</span> +00007 <span class="comment"> */</span><span class="comment"></span> +00008 <span class="comment">/** @addtogroup alloc Memory Functions</span> +00009 <span class="comment"> * Basic malloc/calloc/free functions. These will be changed so </span> +00010 <span class="comment"> * that memory allocation errors will call a handler. The default will</span> +00011 <span class="comment"> * send a signal to the user-space daemon that will trigger the module to</span> +00012 <span class="comment"> * be unloaded.</span> +00013 <span class="comment"> * @todo Need error handling for memory allocations</span> +00014 <span class="comment"> * @todo Some of these currently use kmalloc (GFP_ATOMIC) for</span> +00015 <span class="comment"> * small allocations. This should be evaluated for performance</span> +00016 <span class="comment"> * and stability.</span> +00017 <span class="comment"> * @{</span> +00018 <span class="comment"> */</span> +00019 +00020 <span class="keyword">enum</span> errorcode { ERR_NONE=0, ERR_NO_MEM }; +00021 <span class="keyword">enum</span> errorcode _stp_error = ERR_NONE; +00022 <span class="comment"></span> +00023 <span class="comment">/** Allocates memory within a probe.</span> +00024 <span class="comment"> * This is used for small allocations from within a running</span> +00025 <span class="comment"> * probe where the process cannot sleep. </span> +00026 <span class="comment"> * @param len Number of bytes to allocate.</span> +00027 <span class="comment"> * @return a valid pointer on success or NULL on failure.</span> +00028 <span class="comment"> * @bug Currently uses kmalloc (GFP_ATOMIC).</span> +00029 <span class="comment"> */</span> +00030 +<a name="l00031"></a><a class="code" href="group__alloc.html#ga1">00031</a> <span class="keywordtype">void</span> *<a class="code" href="group__alloc.html#ga1">_stp_alloc</a>(size_t len) +00032 { +00033 <span class="keywordtype">void</span> *ptr = kmalloc(len, GFP_ATOMIC); +00034 <span class="keywordflow">if</span> (unlikely(ptr == NULL)) +00035 _stp_error = ERR_NO_MEM; +00036 <span class="keywordflow">return</span> ptr; +00037 } +00038 <span class="comment"></span> +00039 <span class="comment">/** Allocates and clears memory within a probe.</span> +00040 <span class="comment"> * This is used for small allocations from within a running</span> +00041 <span class="comment"> * probe where the process cannot sleep. </span> +00042 <span class="comment"> * @param len Number of bytes to allocate.</span> +00043 <span class="comment"> * @return a valid pointer on success or NULL on failure.</span> +00044 <span class="comment"> * @bug Currently uses kmalloc (GFP_ATOMIC).</span> +00045 <span class="comment"> */</span> +00046 +<a name="l00047"></a><a class="code" href="group__alloc.html#ga2">00047</a> <span class="keywordtype">void</span> *<a class="code" href="group__alloc.html#ga2">_stp_calloc</a>(size_t len) +00048 { +00049 <span class="keywordtype">void</span> *ptr = <a class="code" href="group__alloc.html#ga1">_stp_alloc</a>(len); +00050 <span class="keywordflow">if</span> (likely(ptr)) +00051 memset(ptr, 0, len); +00052 <span class="keywordflow">return</span> ptr; +00053 } +00054 <span class="comment"></span> +00055 <span class="comment">/** Allocates and clears memory outside a probe.</span> +00056 <span class="comment"> * This is typically used in the module initialization to</span> +00057 <span class="comment"> * allocate new maps, lists, etc.</span> +00058 <span class="comment"> * @param len Number of bytes to allocate.</span> +00059 <span class="comment"> * @return a valid pointer on success or NULL on failure.</span> +00060 <span class="comment"> */</span> +00061 +<a name="l00062"></a><a class="code" href="group__alloc.html#ga3">00062</a> <span class="keywordtype">void</span> *<a class="code" href="group__alloc.html#ga3">_stp_valloc</a>(size_t len) +00063 { +00064 <span class="keywordtype">void</span> *ptr = vmalloc(len); +00065 <span class="keywordflow">if</span> (likely(ptr)) +00066 memset(ptr, 0, len); +00067 <span class="keywordflow">else</span> +00068 _stp_error = ERR_NO_MEM; +00069 <span class="keywordflow">return</span> ptr; +00070 } +00071 <span class="comment"></span> +00072 <span class="comment">/** Frees memory allocated by _stp_alloc or _stp_calloc.</span> +00073 <span class="comment"> * @param ptr pointer to memory to free</span> +00074 <span class="comment"> */</span> +00075 +<a name="l00076"></a><a class="code" href="group__alloc.html#ga4">00076</a> <span class="keywordtype">void</span> <a class="code" href="group__alloc.html#ga4">_stp_free</a>(<span class="keywordtype">void</span> *ptr) +00077 { +00078 <span class="keywordflow">if</span> (likely(ptr)) +00079 kfree(ptr); +00080 } +00081 <span class="comment"></span> +00082 <span class="comment">/** Frees memory allocated by _stp_valloc.</span> +00083 <span class="comment"> * @param ptr pointer to memory to free</span> +00084 <span class="comment"> */</span> +00085 +<a name="l00086"></a><a class="code" href="group__alloc.html#ga5">00086</a> <span class="keywordtype">void</span> <a class="code" href="group__alloc.html#ga5">_stp_vfree</a>(<span class="keywordtype">void</span> *ptr) +00087 { +00088 <span class="keywordflow">if</span> (likely(ptr)) +00089 vfree(ptr); +00090 } +00091 <span class="comment"></span> +00092 <span class="comment">/** @} */</span> +00093 <span class="preprocessor">#endif </span><span class="comment">/* _ALLOC_C_ */</span> +</pre></div></body></html> |