int unregister_NLM(void *NLMHandle)
{
APP_DATA *app_data = (APP_DATA*) get_app_data(gLibId);
NXLock(gLibLock);
if (app_data) {
app_data->initialized = 0;
NXUnlock(gLibLock);
return 0;
}
NXUnlock(gLibLock);
return 1;
}
int setGlobalPool(void *data)
{
APP_DATA *app_data = (APP_DATA*) get_app_data(gLibId);
NXLock(gLibLock);
if (app_data && !app_data->gPool) {
app_data->gPool = data;
}
NXUnlock(gLibLock);
return 1;
}
int register_NLM(void *NLMHandle)
{
APP_DATA *app_data = (APP_DATA*) get_app_data(gLibId);
NXLock(gLibLock);
if (!app_data) {
app_data = (APP_DATA*)library_malloc(gLibHandle, sizeof(APP_DATA));
if (app_data) {
memset (app_data, 0, sizeof(APP_DATA));
set_app_data(gLibId, app_data);
app_data->gs_nlmhandle = NLMHandle;
}
}
if (app_data && (!app_data->initialized)) {
app_data->initialized = 1;
NXUnlock(gLibLock);
return 0;
}
NXUnlock(gLibLock);
return 1;
}
int GetOrSetUpData(int id, libdata_t **appData,
libthreaddata_t **threadData )
{
int err;
libdata_t *app_data;
libthreaddata_t *thread_data;
NXKey_t key;
NX_LOCK_INFO_ALLOC(liblock, "Application Data Lock", 0);
err = 0;
thread_data = (libthreaddata_t *) NULL;
/*
** Attempt to get our data for the application calling us. This is where we
** store whatever application-specific information we need to carry in support
** of calling applications.
*/
app_data = (libdata_t *) get_app_data(id);
if(!app_data) {
/*
** This application hasn't called us before; set up application AND per-thread
** data. Of course, just in case a thread from this same application is calling
** us simultaneously, we better lock our application data-creation mutex. We
** also need to recheck for data after we acquire the lock because WE might be
** that other thread that was too late to create the data and the first thread
** in will have created it.
*/
NXLock(gLibLock);
if(!(app_data = (libdata_t *) get_app_data(id))) {
app_data = malloc(sizeof(libdata_t));
if(app_data) {
memset(app_data, 0, sizeof(libdata_t));
app_data->tenbytes = malloc(10);
app_data->lock = NXMutexAlloc(0, 0, &liblock);
if(!app_data->tenbytes || !app_data->lock) {
if(app_data->lock)
NXMutexFree(app_data->lock);
free(app_data);
app_data = (libdata_t *) NULL;
err = ENOMEM;
}
if(app_data) {
/*
** Here we burn in the application data that we were trying to get by calling
** get_app_data(). Next time we call the first function, we'll get this data
** we're just now setting. We also go on here to establish the per-thread data
** for the calling thread, something we'll have to do on each application
** thread the first time it calls us.
*/
err = set_app_data(gLibId, app_data);
if(err) {
free(app_data);
app_data = (libdata_t *) NULL;
err = ENOMEM;
}
else {
/* create key for thread-specific data... */
err = NXKeyCreate(DisposeThreadData, (void *) NULL, &key);
if(err) /* (no more keys left?) */
key = -1;
app_data->perthreadkey = key;
}
}
}
}
NXUnlock(gLibLock);
}
if(app_data) {
key = app_data->perthreadkey;
if(key != -1 /* couldn't create a key? no thread data */
&& !(err = NXKeyGetValue(key, (void **) &thread_data))
&& !thread_data) {
/*
** Allocate the per-thread data for the calling thread. Regardless of whether
** there was already application data or not, this may be the first call by a
** a new thread. The fact that we allocation 20 bytes on a pointer is not very
** important, this just helps to demonstrate that we can have arbitrarily
** complex per-thread data.
*/
thread_data = malloc(sizeof(libthreaddata_t));
if(thread_data) {
thread_data->_errno = 0;
thread_data->twentybytes = malloc(20);
if(!thread_data->twentybytes) {
free(thread_data);
thread_data = (libthreaddata_t *) NULL;
err = ENOMEM;
}
if((err = NXKeySetValue(key, thread_data))) {
free(thread_data->twentybytes);
free(thread_data);
thread_data = (libthreaddata_t *) NULL;
}
}
}
}
if(appData)
*appData = app_data;
if(threadData)
*threadData = thread_data;
return err;
}
APR_DECLARE(apr_status_t) apr_thread_mutex_unlock(apr_thread_mutex_t *mutex)
{
NXUnlock(mutex->mutex);
return APR_SUCCESS;
}
