pcre32_assign_jit_stack (3) - Linux Manuals
pcre32_assign_jit_stack: Perl-compatible regular expressions
PCRE - Perl-compatible regular expressions
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);
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:
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 pcrejit page.
There is a complete description of the PCRE native API in the pcreapi page and a description of the POSIX API in the pcreposix page.