<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><HTML> <HEAD><meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <TITLE>memory - ImageMagick Memory Allocation Methods</TITLE> <link rel="StyleSheet" href="../magick.css" type="text/css"> </HEAD> <body bgcolor="#FFFFFF" text="#000000" link="#0085c0" alink="#0085c0" vlink="#800080"> <A NAME="__index__"></A> <!-- INDEX BEGIN --> <UL> <LI><A HREF="#name"> <FONT SIZE=-1>NAME</FONT></A> <LI><A HREF="#synopsis"> <FONT SIZE=-1>SYNOPSIS</FONT></A> <LI><A HREF="#function descriptions"> <FONT SIZE=-1>FUNCTION</FONT> <FONT SIZE=-1>DESCRIPTIONS</FONT></A> <UL> <LI><A HREF="#acquirememory">AcquireMemory</A> <LI><A HREF="#clonememory">CloneMemory</A> <LI><A HREF="#liberatememory">LiberateMemory</A> <LI><A HREF="#reacquirememory">ReacquireMemory</A> </UL> </UL> <!-- INDEX END --> <HR> <P> <H1><A NAME="name"> <FONT SIZE=-1>NAME</FONT></A></H1> <P>memory - ImageMagick Memory Allocation Methods</P> <P> <HR> <H1><A NAME="synopsis"> <FONT SIZE=-1>SYNOPSIS</FONT></A></H1> <P>void * <STRONG>AcquireMemory</STRONG>( const size_t size );</P> <P>void * <STRONG>CloneMemory</STRONG>( void *destination, const void *source, const size_t size );</P> <P>void <STRONG>LiberateMemory</STRONG>( void ** memory );</P> <P>void <STRONG>ReacquireMemory</STRONG>( void ** memory, const size_t size );</P> <P> <HR> <H1><A NAME="function descriptions"> <FONT SIZE=-1>FUNCTION</FONT> <FONT SIZE=-1>DESCRIPTIONS</FONT></A></H1> <P> <H2><A NAME="acquirememory">AcquireMemory</A></H2> <blockquote>AcquireMemory() returns a pointer to a block of memory at least size bytes suitably aligned for any use. </blockquote><P>The format of the AcquireMemory method is:</P> <blockquote>void *AcquireMemory ( const size_t size ); </blockquote><P> <FONT SIZE=-1>A</FONT> description of each parameter follows:</P> <DL><DT><DD><DL> <dd><p></p><dt><STRONG><A NAME="item_o_size%3A">size:</A></STRONG><BR> <DD> The size of the memory in bytes to allocate. <P></P></DL></DL> <P> <H2><A NAME="clonememory">CloneMemory</A></H2> <blockquote>CloneMemory() copies size bytes from memory area source to the destination. Copying between objects that overlap will take place correctly. It returns destination. </blockquote><P>The format of the CloneMemory method is:</P> <blockquote>void *CloneMemory ( void *destination, const void *source, const size_t size ); </blockquote><P> <FONT SIZE=-1>A</FONT> description of each parameter follows:</P> <DL><DT><DD><DL> <dd><p></p><dt><STRONG>size:</STRONG><BR> <DD> The size of the memory in bytes to allocate. <P></P></DL></DL> <P> <H2><A NAME="liberatememory">LiberateMemory</A></H2> <blockquote>LiberateMemory() frees memory that has already been allocated, and NULLs the pointer to it. </blockquote><P>The format of the LiberateMemory method is:</P> <blockquote>void LiberateMemory ( void **memory ); </blockquote><P> <FONT SIZE=-1>A</FONT> description of each parameter follows:</P> <DL><DT><DD><DL> <dd><p></p><dt><STRONG><A NAME="item_o_memory%3A">memory:</A></STRONG><BR> <DD> <FONT SIZE=-1>A</FONT> pointer to a block of memory to free for reuse. <P></P></DL></DL> <P> <H2><A NAME="reacquirememory">ReacquireMemory</A></H2> <blockquote>ReacquireMemory() changes the size of the memory and returns a pointer to the ( possibly moved ) block. The contents will be unchanged up to the lesser of the new and old sizes. </blockquote><P>The format of the ReacquireMemory method is:</P> <blockquote>void ReacquireMemory ( void **memory, const size_t size ); </blockquote><P> <FONT SIZE=-1>A</FONT> description of each parameter follows:</P> <DL><DT><DD><DL> <dd><p></p><dt><STRONG>memory:</STRONG><BR> <DD> <FONT SIZE=-1>A</FONT> pointer to a memory allocation. On return the pointer may change but the contents of the original allocation will not. <P></P> <dd><p></p><dt><STRONG>size:</STRONG><BR> <DD> The new size of the allocated memory. </DL></DL> </BODY> </HTML>
