lua-nginx-module/src/ngx_http_lua_pcrefix.c at master · openresty/lua-nginx-module · GitHub

Name: lua-nginx-module/src/ngx_http_lua_pcrefix.c at master · openresty/lua-nginx-module · GitHub
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/*
 * Copyright (C) Xiaozhe Wang (chaoslawful)
 * Copyright (C) Yichun Zhang (agentzh)
 */


#ifndefDDEBUG
#defineDDEBUG 0
#endif
#include"ddebug.h"


#include"ngx_http_lua_pcrefix.h"
#include"stdio.h"

#if (NGX_PCRE)

staticngx_pool_t*ngx_http_lua_pcre_pool=NULL;


#if (NGX_PCRE2)
staticngx_uint_tngx_regex_direct_alloc;
#else
staticvoid*(*old_pcre_malloc)(size_t);
staticvoid (*old_pcre_free)(void*ptr);
#endif


/* XXX: work-around to nginx regex subsystem, must init a memory pool
 * to use PCRE functions. As PCRE still has memory-leaking problems,
 * and nginx overwrote pcre_malloc/free hooks with its own static
 * functions, so nobody else can reuse nginx regex subsystem... */
#if (NGX_PCRE2)

void*
ngx_http_lua_pcre_malloc(size_tsize, void*data)
{
dd("lua pcre pool is %p", ngx_http_lua_pcre_pool);

if (ngx_http_lua_pcre_pool) {
returnngx_palloc(ngx_http_lua_pcre_pool, size);
 }

if (ngx_regex_direct_alloc) {
returnngx_alloc(size, ngx_cycle->log);
 }

fprintf(stderr, "error: lua pcre malloc failed due to empty pcre pool");

returnNULL;
}


void
ngx_http_lua_pcre_free(void*ptr, void*data)
{
dd("lua pcre pool is %p", ngx_http_lua_pcre_pool);

if (ngx_http_lua_pcre_pool) {
ngx_pfree(ngx_http_lua_pcre_pool, ptr);
return;
 }

if (ngx_regex_direct_alloc) {
ngx_free(ptr);
return;
 }

fprintf(stderr, "error: lua pcre free failed due to empty pcre pool");
}

#else

void*
ngx_http_lua_pcre_malloc(size_tsize)
{
dd("lua pcre pool is %p", ngx_http_lua_pcre_pool);

if (ngx_http_lua_pcre_pool) {
returnngx_palloc(ngx_http_lua_pcre_pool, size);
 }

fprintf(stderr, "error: lua pcre malloc failed due to empty pcre pool");

returnNULL;
}


staticvoid
ngx_http_lua_pcre_free(void*ptr)
{
dd("lua pcre pool is %p", ngx_http_lua_pcre_pool);

if (ngx_http_lua_pcre_pool) {
ngx_pfree(ngx_http_lua_pcre_pool, ptr);
return;
 }

fprintf(stderr, "error: lua pcre free failed due to empty pcre pool");
}

#endif


#if (NGX_PCRE2)

ngx_pool_t*
ngx_http_lua_pcre_malloc_init(ngx_pool_t*pool)
{
ngx_pool_t*old_pool;

dd("lua pcre pool was %p", ngx_http_lua_pcre_pool);

ngx_regex_direct_alloc= (pool==NULL) ? 1 : 0;

old_pool=ngx_http_lua_pcre_pool;
ngx_http_lua_pcre_pool=pool;

dd("lua pcre pool is %p", ngx_http_lua_pcre_pool);

returnold_pool;
}


void
ngx_http_lua_pcre_malloc_done(ngx_pool_t*old_pool)
{
dd("lua pcre pool was %p", ngx_http_lua_pcre_pool);

ngx_http_lua_pcre_pool=old_pool;
ngx_regex_direct_alloc=0;

dd("lua pcre pool is %p", ngx_http_lua_pcre_pool);
}

#else

ngx_pool_t*
ngx_http_lua_pcre_malloc_init(ngx_pool_t*pool)
{
ngx_pool_t*old_pool;

if (pcre_malloc!=ngx_http_lua_pcre_malloc) {

dd("overriding nginx pcre malloc and free");

ngx_http_lua_pcre_pool=pool;

old_pcre_malloc=pcre_malloc;
old_pcre_free=pcre_free;

pcre_malloc=ngx_http_lua_pcre_malloc;
pcre_free=ngx_http_lua_pcre_free;

returnNULL;
 }

dd("lua pcre pool was %p", ngx_http_lua_pcre_pool);

old_pool=ngx_http_lua_pcre_pool;
ngx_http_lua_pcre_pool=pool;

dd("lua pcre pool is %p", ngx_http_lua_pcre_pool);

returnold_pool;
}


void
ngx_http_lua_pcre_malloc_done(ngx_pool_t*old_pool)
{
dd("lua pcre pool was %p", ngx_http_lua_pcre_pool);

ngx_http_lua_pcre_pool=old_pool;

dd("lua pcre pool is %p", ngx_http_lua_pcre_pool);

if (old_pool==NULL) {
pcre_malloc=old_pcre_malloc;
pcre_free=old_pcre_free;
 }
}

#endif
#endif/* NGX_PCRE */

/* vi:set ft=c ts=4 sw=4 et fdm=marker: */