# pcre2_jit_compile man page

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>

int pcre2_jit_compile(pcre2_code *code, uint32_t options);

DESCRIPTION

This function requests JIT compilation, which, if the just-in-time compiler is available, further processes a compiled pattern into machine code that executes much faster than the pcre2_match() interpretive matching function. Full details are given in the pcre2jit documentation.

The availability of JIT support can be tested by calling pcre2_compile_jit() with a single option PCRE2_JIT_TEST_ALLOC (the code argument is ignored, so a NULL value is accepted). Such a call returns zero if JIT is available and has a working allocator. Otherwise it returns PCRE2_ERROR_NOMEMORY if JIT is available but cannot allocate executable memory, or PCRE2_ERROR_JIT_UNSUPPORTED if JIT support is not compiled.

Otherwise, the first argument must be a pointer that was returned by a successful call to pcre2_compile(), and the second must contain one or more of the following bits:

      PCRE2_JIT_COMPLETE      compile code for full matching
      PCRE2_JIT_PARTIAL_SOFT  compile code for soft partial matching
      PCRE2_JIT_PARTIAL_HARD  compile code for hard partial matching

There is also an obsolete option called PCRE2_JIT_INVALID_UTF, which has been superseded by the pcre2_compile() option PCRE2_MATCH_INVALID_UTF. The old option is deprecated and may be removed in the future.

The yield of the function when called with any of the three options above is 0 for success, or a negative error code otherwise. In particular, PCRE2_ERROR_JIT_BADOPTION is returned if JIT is not supported or if an unknown bit is set in options. The function can also return PCRE2_ERROR_NOMEMORY if JIT is unable to allocate executable memory for the compiler, even if it was because of a system security restriction. In a few cases, the function may return with PCRE2_ERROR_JIT_UNSUPPORTED for unsupported features.

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.