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<html>
<head>
<meta name="keywords" content="eso, FITS format, C library">
<link href="doxygen.css" rel="stylesheet" type="text/css">
<title>QFITS Reference Manual 6.2.0</title>
</head>
<body text="#000000" bgcolor="#ffffff">
<!-- Generated by Doxygen 1.4.1 -->
<h1>POSIX-compatible extended memory handling</h1><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__qfits__memory.html#ga0">qfits_memory_malloc</a> (size_t size, const char *filename, int lineno)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Allocate memory. <a href="#ga0"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__qfits__memory.html#ga1">qfits_memory_calloc</a> (size_t nmemb, size_t size, const char *filename, int lineno)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Allocate memory. <a href="#ga1"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__qfits__memory.html#ga2">qfits_memory_falloc</a> (char *name, size_t offs, size_t *size, const char *srcname, int srclin)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Map a file's contents to memory as a char pointer. <a href="#ga2"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__qfits__memory.html#ga3">qfits_memory_fdealloc</a> (void *ptr, size_t offs, size_t size, const char *filename, int lineno)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Free memory that has been allocated with falloc. <a href="#ga3"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__qfits__memory.html#ga4">qfits_memory_free</a> (void *ptr, const char *filename, int lineno)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Free memory. <a href="#ga4"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__qfits__memory.html#ga5">qfits_memory_realloc</a> (void *ptr, size_t size, const char *filename, int lineno)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Re-Allocate memory. <a href="#ga5"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="group__qfits__memory.html#ga6">qfits_memory_strdup</a> (const char *s, const char *filename, int lineno)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Duplicate a string using calloc. <a href="#ga6"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group__qfits__memory.html#ga7">qfits_memory_status</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Display memory status information. <a href="#ga7"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group__qfits__memory.html#ga8">qfits_memory_is_empty</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Tell if there is still some memory allocated. <a href="#ga8"></a><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
qfits_memory is a small and efficient module offering memory extension capabitilies to ANSI C programs running on POSIX-compliant systems. It offers several useful features such as memory leak detection, protection for free on NULL or unallocated pointers, and virtually unlimited memory space. qfits_memory requires the <code>mmap()</code> system call to be implemented in the local C library to function. This module has been tested on a number of current Unix * flavours and is reported to work fine. The current limitation is the limited number of pointers it can handle at the same time. <hr><h2>Function Documentation</h2>
<a class="anchor" name="ga1" doxytag="qfits_memory.c::qfits_memory_calloc"></a><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">void* qfits_memory_calloc </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">size_t </td>
<td class="mdname" nowrap> <em>nmemb</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>size_t </td>
<td class="mdname" nowrap> <em>size</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>filename</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>lineno</em></td>
</tr>
<tr>
<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Allocate memory.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>nmemb</em> </td><td>Number of elements to allocate. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>size</em> </td><td>Size (in bytes) of each element. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>filename</em> </td><td>Name of the file where the alloc took place. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lineno</em> </td><td>Line number in the file. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>1 newly allocated pointer.</dd></dl>
This function is a replacement call for calloc. It should never be called directly but through a macro instead, as:<p>
<div class="fragment"><pre class="fragment"> <a class="code" href="group__qfits__memory.html#ga1">qfits_memory_calloc</a>(nmemb, size, __FILE__, __LINE__)
</pre></div> </td>
</tr>
</table>
<a class="anchor" name="ga2" doxytag="qfits_memory.c::qfits_memory_falloc"></a><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">char* qfits_memory_falloc </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">char * </td>
<td class="mdname" nowrap> <em>name</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>size_t </td>
<td class="mdname" nowrap> <em>offs</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>size_t * </td>
<td class="mdname" nowrap> <em>size</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>srcname</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>srclin</em></td>
</tr>
<tr>
<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Map a file's contents to memory as a char pointer.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>name</em> </td><td>Name of the file to map </td></tr>
<tr><td valign="top"></td><td valign="top"><em>offs</em> </td><td>Offset to the first mapped byte in file. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>size</em> </td><td>Returned size of the mapped file in bytes. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>srcname</em> </td><td>Name of the source file making the call. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>srclin</em> </td><td>Line # where the call was made. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>A pointer to char, to be freed using <a class="el" href="group__qfits__memory.html#ga4">qfits_memory_free()</a>.</dd></dl>
This function takes in input the name of a file. It tries to map the file into memory and if it succeeds, returns the file's contents as a char pointer. It also modifies the input size variable to be the size of the mapped file in bytes. This function is normally never directly called but through the falloc() macro.<p>
The offset indicates the starting point for the mapping, i.e. if you are not interested in mapping the whole file but only from a given place.<p>
The returned pointer ptr must be deallocated with qfits_memory_fdealloc(ptr) </td>
</tr>
</table>
<a class="anchor" name="ga3" doxytag="qfits_memory.c::qfits_memory_fdealloc"></a><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">void qfits_memory_fdealloc </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void * </td>
<td class="mdname" nowrap> <em>ptr</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>size_t </td>
<td class="mdname" nowrap> <em>offs</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>size_t </td>
<td class="mdname" nowrap> <em>size</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>filename</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>lineno</em></td>
</tr>
<tr>
<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Free memory that has been allocated with falloc.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>ptr</em> </td><td>Pointer to free. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>offs</em> </td><td>Offset to the first mapped byte in file. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>size</em> </td><td>size to unmap </td></tr>
<tr><td valign="top"></td><td valign="top"><em>filename</em> </td><td>Name of the file where the dealloc took place. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lineno</em> </td><td>Line number in the file. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>void </dd></dl>
</td>
</tr>
</table>
<a class="anchor" name="ga4" doxytag="qfits_memory.c::qfits_memory_free"></a><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">void qfits_memory_free </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void * </td>
<td class="mdname" nowrap> <em>ptr</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>filename</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>lineno</em></td>
</tr>
<tr>
<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Free memory.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>ptr</em> </td><td>Pointer to free. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>filename</em> </td><td>Name of the file where the dealloc took place. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lineno</em> </td><td>Line number in the file. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>void</dd></dl>
Free the memory associated to a given pointer. Prints out a warning on stderr if the requested pointer is NULL or cannot be found in the extended memory table. </td>
</tr>
</table>
<a class="anchor" name="ga8" doxytag="qfits_memory.c::qfits_memory_is_empty"></a><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">int qfits_memory_is_empty </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Tell if there is still some memory allocated.
<p>
<dl compact><dt><b>Returns:</b></dt><dd>1 if the memory table is tempty, 0 if no, -1 if the memory model is off </dd></dl>
</td>
</tr>
</table>
<a class="anchor" name="ga0" doxytag="qfits_memory.c::qfits_memory_malloc"></a><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">void* qfits_memory_malloc </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">size_t </td>
<td class="mdname" nowrap> <em>size</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>filename</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>lineno</em></td>
</tr>
<tr>
<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing="5" cellpadding="0" border="0">
<tr>
<td>
</td>
<td>
<p>
Allocate memory.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>size</em> </td><td>Size (in bytes) to allocate. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>filename</em> </td><td>Name of the file where the alloc took place. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lineno</em> </td><td>Line number in the file. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>1 newly allocated pointer.</dd></dl>
This function is a replacement call for malloc. It should never be called directly but through a macro instead, as:<p>
<div class="fragment"><pre class="fragment"> <a class="code" href="group__qfits__memory.html#ga0">qfits_memory_malloc</a>(size, __FILE__, __LINE__)
</pre></div> </td>
</tr>
</table>
<a class="anchor" name="ga5" doxytag="qfits_memory.c::qfits_memory_realloc"></a><p>
<table class="mdTable" cellpadding="2" cellspacing="0">
<tr>
<td class="mdRow">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td class="md" nowrap valign="top">void* qfits_memory_realloc </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void * </td>
<td class="mdname" nowrap> <em>ptr</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>size_t </td>
<td class="mdname" nowrap> <em>size</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>filename</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>lineno</em></td>
</tr>
<tr>
<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
</tr>
</table>
</td>
</tr>
</table>
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</td>
<td>
<p>
Re-Allocate memory.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>ptr</em> </td><td>Pointer to free. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>size</em> </td><td>Size (in bytes) to allocate. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>filename</em> </td><td>Name of the file where the alloc took place. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lineno</em> </td><td>Line number in the file. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>1 newly allocated pointer.</dd></dl>
This function is a replacement call for realloc. It should never be called directly but through a macro instead, as:<p>
<div class="fragment"><pre class="fragment"> <a class="code" href="group__qfits__memory.html#ga5">qfits_memory_realloc</a>(nmemb, size, __FILE__, __LINE__)
</pre></div> </td>
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<a class="anchor" name="ga7" doxytag="qfits_memory.c::qfits_memory_status"></a><p>
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<td class="md" nowrap valign="top">void qfits_memory_status </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">void </td>
<td class="mdname1" valign="top" nowrap> </td>
<td class="md" valign="top"> ) </td>
<td class="md" nowrap></td>
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</td>
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<table cellspacing="5" cellpadding="0" border="0">
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<td>
</td>
<td>
<p>
Display memory status information.
<p>
<dl compact><dt><b>Returns:</b></dt><dd>void</dd></dl>
This function is meant for debugging purposes, but it is recommended to call it at the end of every executable making use of the extended memory features. </td>
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<a class="anchor" name="ga6" doxytag="qfits_memory.c::qfits_memory_strdup"></a><p>
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<td class="md" nowrap valign="top">char* qfits_memory_strdup </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top">const char * </td>
<td class="mdname" nowrap> <em>s</em>, </td>
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<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>filename</em>, </td>
</tr>
<tr>
<td class="md" nowrap align="right"></td>
<td class="md"></td>
<td class="md" nowrap>int </td>
<td class="mdname" nowrap> <em>lineno</em></td>
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<td class="md"></td>
<td class="md">) </td>
<td class="md" colspan="2"></td>
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</td>
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<td>
<p>
Duplicate a string using calloc.
<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>s</em> </td><td>String to duplicate. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>filename</em> </td><td>Name of the file where the call took place. </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lineno</em> </td><td>Line number in the file. </td></tr>
</table>
</dl>
<dl compact><dt><b>Returns:</b></dt><dd>1 newly allocated character string.</dd></dl>
This function calls in turn calloc to perform the allocation. It should never be called directly but only through a macro, like:<p>
<div class="fragment"><pre class="fragment"> <a class="code" href="group__qfits__memory.html#ga6">qfits_memory_strdup</a>(s, __FILE__, __LINE__)
</pre></div><p>
This function calls <a class="el" href="group__qfits__memory.html#ga0">qfits_memory_malloc()</a> to do the allocation. </td>
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