+Return to the PCRE2 index page. +
+
+This page is part of the PCRE2 HTML documentation. It was generated
+automatically from the original man page. If there is any nonsense in it,
+please consult the man page, in case the conversion went wrong.
+
+
+SYNOPSIS
+
+
+#include <pcre2.h> +
++void pcre2_jit_stack_assign(pcre2_match_context *mcontext, + pcre2_jit_callback callback_function, void *callback_data); +
++This function provides control over the memory used by JIT as a run-time stack +when pcre2_match() or pcre2_jit_match() is called with a pattern +that has been successfully processed by the JIT compiler. The information that +determines which stack is used is put into a match context that is subsequently +passed to a matching function. The arguments of this function are: +
+ mcontext a pointer to a match context + callback a callback function + callback_data a JIT stack or a value to be passed to the callback ++ +
+If mcontext is NULL, the function returns immediately, without doing +anything. +
++If callback is NULL and callback_data is NULL, an internal 32KiB +block on the machine stack is used. +
++If callback is NULL and callback_data is not NULL, +callback_data must be a valid JIT stack, the result of calling +pcre2_jit_stack_create(). +
++If callback not NULL, it is called with callback_data as an +argument at the start of matching, in order to set up a JIT stack. If the +result is NULL, the internal 32KiB stack is used; otherwise the return value +must be a valid JIT stack, the result of calling +pcre2_jit_stack_create(). +
++You may safely use the same JIT stack for 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 +pcre2jit +page. +
++There is a complete description of the PCRE2 native API in the +pcre2api +page and a description of the POSIX API in the +pcre2posix +page. +
+Return to the PCRE2 index page. +