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//proc/self/root/opt/pcre/share/doc/pcre/html/pcre_assign_jit_stack.html

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<title>pcre_assign_jit_stack specification</title>
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<h1>pcre_assign_jit_stack man page</h1>

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SYNOPSIS
 

#include &#60;pcre.h&#62;


void pcre_assign_jit_stack(pcre_extra *extra,
 pcre_jit_callback callback, void *data);
 
 
void pcre16_assign_jit_stack(pcre16_extra *extra,
 pcre16_jit_callback callback, void *data);
 
 
void pcre32_assign_jit_stack(pcre32_extra *extra,
 pcre32_jit_callback callback, void *data);

 
DESCRIPTION
 

This function provides control over the memory used as a stack at run-time by a
call to pcre[16|32]_exec() with a pattern that has been successfully
compiled with JIT optimization. The arguments are:
<pre>
 extra the data pointer returned by pcre[16|32]_study()
 callback a callback function
 data a JIT stack or a value to be passed to the callback
 function
</PRE>


If callback is NULL and data is NULL, an internal 32K block on
the machine stack is used.


If callback is NULL and data is not NULL, data must
be a valid JIT stack, the result of calling pcre[16|32]_jit_stack_alloc().


If callback not NULL, it is called with data as an argument at
the start of matching, in order to set up a JIT stack. If the result is NULL,
the internal 32K stack is used; otherwise the return value must be a valid JIT
stack, the result of calling pcre[16|32]_jit_stack_alloc().


You may safely assign the same JIT stack to multiple patterns, as long as they
are all matched in the same thread. In a multithread application, each thread
must use its own JIT stack. For more details, see the
<a href="pcrejit.html">pcrejit</a>
page.


There is a complete description of the PCRE native API in the
<a href="pcreapi.html">pcreapi</a>
page and a description of the POSIX API in the
<a href="pcreposix.html">pcreposix</a>
page.

Return to the <a href="index.html">PCRE index page</a>.