I tried to make the class MyFilterInit a Singleton class, but when CreateServerConfig is called the second time, MyFilterInit constructor is called is called second time, and here I see that the static instance of MyFilterInit in the second call is set to NULL, which should have ideally been a address that was set by the previous call.
Any help is highly appreciated. On Sat, May 25, 2013 at 6:52 PM, Sindhi Sindhi <sindhi....@gmail.com> wrote: > Hi, > > I see that the create_server_config callback is called twice for every > Apache server startup. I want to do a lot of initialization in this > callback and allocations in this function are meant to be long lived. And > these buffers are very huge, so I want to ensure these initializations are > done only once per server start. As of now I'm trying to do the following - > > typedef struct > { > int bEnabled; // Enable or disable the module. > MyFilterInit* myFilterInitObj; // A class that has methods to do all huge > initializations > bool serverConfigured; > } MyFilterConfig; > > static int serverConfigHit = 0; > > static void* CreateServerConfig(apr_pool_t* pool, server_rec* virtServer) { > MyFilterConfig *pExistingConfig = (MyFilterConfig *) > ap_get_module_config (virtServer, &tag_filter_module); > > if (serverConfigHit == 0) { > MyFilterConfig *pConfig = (MyFilterConfig *) apr_pcalloc (pool, sizeof > *pConfig); > pConfig->myFilterInitObj = new MyFilterInit(); // This does all the huge > initializations > serverConfigHit = serverConfigHit +1; > return pConfig; > } > return pExistingConfig; > } > > But I see an issue here. The second time when CreateServerConfig is > called, > 1. pExistingConfig is not having the address which was set during the > first call to CreateServerConfig > 2. serverConfigHit is zero. > > Which means when CreateServerConfig was called first time, all the > initializations I made is not recorded by the server. Which means all the > allocations I made in the first call using malloc/new will result in a > memory leak. > > Kindly advice how do I ensure that my initializations are performed only > once. > > Thanks >