/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
#include "curl_setup.h"
#ifdef NETWARE /* Novell NetWare */
#ifdef __NOVELL_LIBC__
/* For native LibC-based NLM we need to register as a real lib. */
#include <library.h>
#include <netware.h>
#include <screen.h>
#include <nks/thread.h>
#include <nks/synch.h>
#include "curl_memory.h"
/* The last #include file should be: */
#include "memdebug.h"
typedef struct
{
int _errno;
void *twentybytes;
} libthreaddata_t;
typedef struct
{
int x;
int y;
int z;
void *tenbytes;
NXKey_t perthreadkey; /* if -1, no key obtained... */
NXMutex_t *lock;
} libdata_t;
int gLibId = -1;
void *gLibHandle = (void *) NULL;
rtag_t gAllocTag = (rtag_t) NULL;
NXMutex_t *gLibLock = (NXMutex_t *) NULL;
/* internal library function prototypes... */
int DisposeLibraryData( void * );
void DisposeThreadData( void * );
int GetOrSetUpData( int id, libdata_t **data, libthreaddata_t **threaddata );
int _NonAppStart( void *NLMHandle,
void *errorScreen,
const char *cmdLine,
const char *loadDirPath,
size_t uninitializedDataLength,
void *NLMFileHandle,
int (*readRoutineP)( int conn,
void *fileHandle, size_t offset,
size_t nbytes,
size_t *bytesRead,
void *buffer ),
size_t customDataOffset,
size_t customDataSize,
int messageCount,
const char **messages )
{
NX_LOCK_INFO_ALLOC(liblock, "Per-Application Data Lock", 0);
#ifndef __GNUC__
#pragma unused(cmdLine)
#pragma unused(loadDirPath)
#pragma unused(uninitializedDataLength)
#pragma unused(NLMFileHandle)
#pragma unused(readRoutineP)
#pragma unused(customDataOffset)
#pragma unused(customDataSize)
#pragma unused(messageCount)
#pragma unused(messages)
#endif
/*
* Here we process our command line, post errors (to the error screen),
* perform initializations and anything else we need to do before being able
* to accept calls into us. If we succeed, we return non-zero and the NetWare
* Loader will leave us up, otherwise we fail to load and get dumped.
*/
gAllocTag = AllocateResourceTag(NLMHandle,
"<library-name> memory allocations",
AllocSignature);
if(!gAllocTag) {
OutputToScreen(errorScreen, "Unable to allocate resource tag for "
"library memory allocations.\n");
return -1;
}
gLibId = register_library(DisposeLibraryData);
if(gLibId < -1) {
OutputToScreen(errorScreen, "Unable to register library with kernel.\n");
return -1;
}
gLibHandle = NLMHandle;
gLibLock = NXMutexAlloc(0, 0, &liblock);
if(!gLibLock) {
OutputToScreen(errorScreen, "Unable to allocate library data lock.\n");
return -1;
}
return 0;
}
/*
* Here we clean up any resources we allocated. Resource tags is a big part
* of what we created, but NetWare doesn't ask us to free those.
*/
void _NonAppStop( void )
{
(void) unregister_library(gLibId);
NXMutexFree(gLibLock);
}
/*
* This function cannot be the first in the file for if the file is linked
* first, then the check-unload function's offset will be nlmname.nlm+0
* which is how to tell that there isn't one. When the check function is
* first in the linked objects, it is ambiguous. For this reason, we will
* put it inside this file after the stop function.
*
* Here we check to see if it's alright to ourselves to be unloaded. If not,
* we return a non-zero value. Right now, there isn't any reason not to allow
* it.
*/
int _NonAppCheckUnload( void )
{
return 0;
}
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 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;
}
int DisposeLibraryData( void *data )
{
if(data) {
void *tenbytes = ((libdata_t *) data)->tenbytes;
if(tenbytes)
free(tenbytes);
free(data);
}
return 0;
}
void DisposeThreadData( void *data )
{
if(data) {
void *twentybytes = ((libthreaddata_t *) data)->twentybytes;
if(twentybytes)
free(twentybytes);
free(data);
}
}
#else /* __NOVELL_LIBC__ */
/* For native CLib-based NLM seems we can do a bit more simple. */
#include <nwthread.h>
int main ( void )
{
/* initialize any globals here... */
/* do this if any global initializing was done
SynchronizeStart();
*/
ExitThread (TSR_THREAD, 0);
return 0;
}
#endif /* __NOVELL_LIBC__ */
#else /* NETWARE */
#ifdef __POCC__
# pragma warn(disable:2024) /* Disable warning #2024: Empty input file */
#endif
#endif /* NETWARE */
Submit an article or tip