int __LibCThreadInit( void )
/**************************/
{
int err = 0;
if( __NXSlotID == NO_INDEX )
{
err = NXKeyCreate(__LibCKeyValueDestructor, (void *) NULL, &__NXSlotID);
}
if((0 != err) || ( __NXSlotID == NO_INDEX ))
{
return( FALSE );
}
return( TRUE );
}
apr_status_t apr_threadkey_private_create(apr_threadkey_t **key,
void (*dest)(void *), apr_pool_t *pool)
{
apr_status_t stat;
(*key) = (apr_threadkey_t *)apr_palloc(pool, sizeof(apr_threadkey_t));
if ((*key) == NULL) {
return APR_ENOMEM;
}
(*key)->pool = pool;
if ((stat = NXKeyCreate(NULL, dest, &(*key)->key)) == 0) {
return stat;
}
return stat;
}
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;
}