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| <h4 class="subsection">3.2.2 Unconstrained Allocation</h4> |
| |
| <p><a name="index-unconstrained-memory-allocation-254"></a><a name="index-g_t_0040code_007bmalloc_007d-function-255"></a><a name="index-heap_002c-dynamic-allocation-from-256"></a> |
| The most general dynamic allocation facility is <code>malloc</code>. It |
| allows you to allocate blocks of memory of any size at any time, make |
| them bigger or smaller at any time, and free the blocks individually at |
| any time (or never). |
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| <ul class="menu"> |
| <li><a accesskey="1" href="Basic-Allocation.html#Basic-Allocation">Basic Allocation</a>: Simple use of <code>malloc</code>. |
| <li><a accesskey="2" href="Malloc-Examples.html#Malloc-Examples">Malloc Examples</a>: Examples of <code>malloc</code>. <code>xmalloc</code>. |
| <li><a accesskey="3" href="Freeing-after-Malloc.html#Freeing-after-Malloc">Freeing after Malloc</a>: Use <code>free</code> to free a block you |
| got with <code>malloc</code>. |
| <li><a accesskey="4" href="Changing-Block-Size.html#Changing-Block-Size">Changing Block Size</a>: Use <code>realloc</code> to make a block |
| bigger or smaller. |
| <li><a accesskey="5" href="Allocating-Cleared-Space.html#Allocating-Cleared-Space">Allocating Cleared Space</a>: Use <code>calloc</code> to allocate a |
| block and clear it. |
| <li><a accesskey="6" href="Efficiency-and-Malloc.html#Efficiency-and-Malloc">Efficiency and Malloc</a>: Efficiency considerations in use of |
| these functions. |
| <li><a accesskey="7" href="Aligned-Memory-Blocks.html#Aligned-Memory-Blocks">Aligned Memory Blocks</a>: Allocating specially aligned memory. |
| <li><a accesskey="8" href="Malloc-Tunable-Parameters.html#Malloc-Tunable-Parameters">Malloc Tunable Parameters</a>: Use <code>mallopt</code> to adjust allocation |
| parameters. |
| <li><a accesskey="9" href="Heap-Consistency-Checking.html#Heap-Consistency-Checking">Heap Consistency Checking</a>: Automatic checking for errors. |
| <li><a href="Hooks-for-Malloc.html#Hooks-for-Malloc">Hooks for Malloc</a>: You can use these hooks for debugging |
| programs that use <code>malloc</code>. |
| <li><a href="Statistics-of-Malloc.html#Statistics-of-Malloc">Statistics of Malloc</a>: Getting information about how much |
| memory your program is using. |
| <li><a href="Summary-of-Malloc.html#Summary-of-Malloc">Summary of Malloc</a>: Summary of <code>malloc</code> and related functions. |
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