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<TITLE>Data Structures and Algorithms: Memory Allocators</TITLE>

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PLDS210 University of Western Australia">
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<FONT FACE=helvetica SIZE=+1><I>Data Structures and Algorithms</I></FONT>
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<TR><TD><FONT FACE=helvetica SIZE=+2><B>Memory Allocators</B></FONT>
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<P>

C implementations provide a number of memory allocation functions
which allocate memory from the program's <i>heap</i>.
This is usually an area of memory above the program and data blocks
which grows upwards in memory as memory is allocated by program 
requests.
<p>
The two most commonly used C functions are <tt><FONT COLOR=green>malloc</FONT></tt> and
<tt><FONT COLOR=green>calloc</FONT></tt>.
<p>
Full descriptions may be found in the Unix man pages
for malloc and calloc.
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<IMG SRC="prog_heap.gif" tppabs="http://www.ee.uwa.edu.au/~plsd210/ds/fig/prog_heap.gif"><BR>
Fig 1 A typical program's use of memory.
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&copy; <A HREF=mailto:morris@ee.uwa.edu.au>John Morris</A>, 1998
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