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Added renaming of conflicting mysql library functions.

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This commit is contained in:
vraatikka 2013-07-08 11:13:04 +03:00
parent 9d23fb024f
commit a9b2f199b6
1 changed files with 41 additions and 5 deletions
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46
modules/routing/readwritesplit/router.c
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@ -15,6 +15,7 @@
*
* Copyright SkySQL Ab 2013
*/
#include <dlfcn.h>
#include <stdio.h>
#include <router.h>
#if defined(SS_DEBUG)
@ -43,6 +44,22 @@ static void diagnostic(ROUTER *instance, DCB *dcb);
static ROUTER_OBJECT MyObject = { createInstance, newSession, closeSession, routeQuery, diagnostic };
/**
* mysql_library_* functions are redefined to refer to correct renamed versions
* of initialization functions. Renamed instances are loaded explicitly from
* libmysqld to avoid conflicts with those from libmysqlclient.
*/
#define mysql_library_init _mysql_server_init
#define mysql_library_end _mysql_server_end
/**
* smysql_server_init points to mysql_library_init alias mysql_server_init in
* libmysqld, and especially not to that included in libmysqlclient.
*/
int (*_mysql_server_init)(int, char **, char **);
void (*_mysql_server_end) (void);
void (*_mysql_close) (MYSQL*);
#if defined(SS_DEBUG)
static char* server_options[] = {
"raatikka",
@ -67,14 +84,14 @@ static void vilhos_test_for_query_classifier(void)
{
bool failp;
MYSQL* mysql = NULL;
/**
/**
* Init libmysqld.
*/
failp = mysql_library_init(num_elements, server_options, server_groups);
if (failp) {
MYSQL* mysql = mysql_init(NULL);
MYSQL* mysql = _mysql_init(NULL);
ss_dassert(mysql != NULL);
fprintf(stderr,
"mysql_init failed, %d : %s\n",
@ -99,8 +116,8 @@ static void vilhos_test_for_query_classifier(void)
*/
skygw_log_write(NULL, LOGFILE_MESSAGE,str);
mysql_close(mysql);
mysql_thread_end();
_mysql_close(mysql);
_mysql_thread_end();
mysql_library_end();
return_without_server:
@ -109,6 +126,24 @@ return_without_server:
}
#endif /* SS_DEBUG */
static void rename_libfuncs(void)
{
void* dlhandle;
void* sym;
dlhandle = dlopen(
"/home/raatikka/src/bazaar/shared/maria/5.5/libmysqld/libmysqld.so.18",
RTLD_NOW|RTLD_LOCAL);
sym = dlsym(dlhandle, "mysql_server_init");
_mysql_server_init = (int (*)(int, char**, char**))sym;
sym = dlsym(dlhandle, "mysql_server_end");
_mysql_server_end = (void (*)(void))sym;
sym = dlsym(dlhandle, "mysql_close");
_mysql_close = (void (*)(MYSQL*))sym;
sym = dlsym(dlhandle, "mysql_thread_end");
_mysql_thread_end = (void (*)(MYSQL*))sym;
}
/**
* Implementation of the mandatory version entry point
*
@ -127,6 +162,7 @@ version()
void
ModuleInit()
{
rename_libfuncs();
#if defined(SS_DEBUG)
vilhos_test_for_query_classifier();
#endif