mirror of
https://github.com/moparisthebest/curl
synced 2024-12-23 16:48:49 -05:00
301 lines
8.8 KiB
C
301 lines
8.8 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* $Id$
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***************************************************************************/
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#include <library.h>
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#include <netware.h>
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#include <screen.h>
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#include <nks/thread.h>
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#include <nks/synch.h>
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#include "memory.h"
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#include "memdebug.h"
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typedef struct
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{
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int _errno;
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void *twentybytes;
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} libthreaddata_t;
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typedef struct
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{
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int x;
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int y;
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int z;
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void *tenbytes;
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NXKey_t perthreadkey; /* if -1, no key obtained... */
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NXMutex_t *lock;
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} libdata_t;
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int gLibId = -1;
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void *gLibHandle = (void *) NULL;
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rtag_t gAllocTag = (rtag_t) NULL;
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NXMutex_t *gLibLock = (NXMutex_t *) NULL;
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/* internal library function prototypes... */
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int DisposeLibraryData ( void * );
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void DisposeThreadData ( void * );
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int GetOrSetUpData ( int id, libdata_t **data, libthreaddata_t **threaddata );
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int _NonAppStart( void *NLMHandle,
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void *errorScreen,
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const char *cmdLine,
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const char *loadDirPath,
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size_t uninitializedDataLength,
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void *NLMFileHandle,
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int (*readRoutineP)( int conn,
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void *fileHandle, size_t offset,
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size_t nbytes,
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size_t *bytesRead,
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void *buffer ),
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size_t customDataOffset,
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size_t customDataSize,
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int messageCount,
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const char **messages )
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{
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NX_LOCK_INFO_ALLOC(liblock, "Per-Application Data Lock", 0);
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#ifndef __GNUC__
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#pragma unused(cmdLine)
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#pragma unused(loadDirPath)
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#pragma unused(uninitializedDataLength)
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#pragma unused(NLMFileHandle)
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#pragma unused(readRoutineP)
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#pragma unused(customDataOffset)
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#pragma unused(customDataSize)
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#pragma unused(messageCount)
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#pragma unused(messages)
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#endif
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/*
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** Here we process our command line, post errors (to the error screen),
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** perform initializations and anything else we need to do before being able
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** to accept calls into us. If we succeed, we return non-zero and the NetWare
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** Loader will leave us up, otherwise we fail to load and get dumped.
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*/
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gAllocTag = AllocateResourceTag(NLMHandle,
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"<library-name> memory allocations",
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AllocSignature);
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if (!gAllocTag) {
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OutputToScreen(errorScreen, "Unable to allocate resource tag for "
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"library memory allocations.\n");
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return -1;
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}
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gLibId = register_library(DisposeLibraryData);
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if (gLibId < -1) {
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OutputToScreen(errorScreen, "Unable to register library with kernel.\n");
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return -1;
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}
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gLibHandle = NLMHandle;
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gLibLock = NXMutexAlloc(0, 0, &liblock);
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if (!gLibLock) {
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OutputToScreen(errorScreen, "Unable to allocate library data lock.\n");
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return -1;
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}
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return 0;
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}
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/*
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** Here we clean up any resources we allocated. Resource tags is a big part
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** of what we created, but NetWare doesn't ask us to free those.
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*/
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void _NonAppStop( void )
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{
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(void) unregister_library(gLibId);
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NXMutexFree(gLibLock);
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}
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/*
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** This function cannot be the first in the file for if the file is linked
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** first, then the check-unload function's offset will be nlmname.nlm+0
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** which is how to tell that there isn't one. When the check function is
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** first in the linked objects, it is ambiguous. For this reason, we will
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** put it inside this file after the stop function.
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**
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** Here we check to see if it's alright to ourselves to be unloaded. If not,
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** we return a non-zero value. Right now, there isn't any reason not to allow
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** it.
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*/
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int _NonAppCheckUnload( void )
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{
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return 0;
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}
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int GetOrSetUpData(int id, libdata_t **appData,
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libthreaddata_t **threadData )
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{
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int err;
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libdata_t *app_data;
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libthreaddata_t *thread_data;
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NXKey_t key;
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NX_LOCK_INFO_ALLOC(liblock, "Application Data Lock", 0);
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err = 0;
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thread_data = (libthreaddata_t *) NULL;
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/*
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** Attempt to get our data for the application calling us. This is where we
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** store whatever application-specific information we need to carry in support
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** of calling applications.
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*/
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app_data = (libdata_t *) get_app_data(id);
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if (!app_data) {
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/*
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** This application hasn't called us before; set up application AND per-thread
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** data. Of course, just in case a thread from this same application is calling
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** us simultaneously, we better lock our application data-creation mutex. We
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** also need to recheck for data after we acquire the lock because WE might be
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** that other thread that was too late to create the data and the first thread
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** in will have created it.
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*/
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NXLock(gLibLock);
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if (!(app_data = (libdata_t *) get_app_data(id))) {
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app_data = (libdata_t *) malloc(sizeof(libdata_t));
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if (app_data) {
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memset(app_data, 0, sizeof(libdata_t));
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app_data->tenbytes = malloc(10);
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app_data->lock = NXMutexAlloc(0, 0, &liblock);
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if (!app_data->tenbytes || !app_data->lock) {
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if (app_data->lock)
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NXMutexFree(app_data->lock);
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free(app_data);
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app_data = (libdata_t *) NULL;
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err = ENOMEM;
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}
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if (app_data) {
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/*
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** Here we burn in the application data that we were trying to get by calling
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** get_app_data(). Next time we call the first function, we'll get this data
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** we're just now setting. We also go on here to establish the per-thread data
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** for the calling thread, something we'll have to do on each application
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** thread the first time it calls us.
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*/
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err = set_app_data(gLibId, app_data);
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if (err) {
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free(app_data);
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app_data = (libdata_t *) NULL;
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err = ENOMEM;
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}
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else {
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/* create key for thread-specific data... */
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err = NXKeyCreate(DisposeThreadData, (void *) NULL, &key);
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if (err) /* (no more keys left?) */
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key = -1;
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app_data->perthreadkey = key;
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}
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}
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}
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}
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NXUnlock(gLibLock);
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}
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if (app_data) {
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key = app_data->perthreadkey;
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if (key != -1 /* couldn't create a key? no thread data */
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&& !(err = NXKeyGetValue(key, (void **) &thread_data))
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&& !thread_data) {
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/*
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** Allocate the per-thread data for the calling thread. Regardless of whether
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** there was already application data or not, this may be the first call by a
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** a new thread. The fact that we allocation 20 bytes on a pointer is not very
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** important, this just helps to demonstrate that we can have arbitrarily
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** complex per-thread data.
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*/
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thread_data = (libthreaddata_t *) malloc(sizeof(libthreaddata_t));
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if (thread_data) {
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thread_data->_errno = 0;
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thread_data->twentybytes = malloc(20);
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if (!thread_data->twentybytes) {
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free(thread_data);
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thread_data = (libthreaddata_t *) NULL;
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err = ENOMEM;
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}
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if ((err = NXKeySetValue(key, thread_data))) {
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free(thread_data->twentybytes);
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free(thread_data);
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thread_data = (libthreaddata_t *) NULL;
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}
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}
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}
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}
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if (appData)
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*appData = app_data;
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if (threadData)
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*threadData = thread_data;
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return err;
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}
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int DisposeLibraryData( void *data)
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{
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if (data) {
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void *tenbytes = ((libdata_t *) data)->tenbytes;
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if (tenbytes)
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free(tenbytes);
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free(data);
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}
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return 0;
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}
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void DisposeThreadData(void *data)
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{
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if (data) {
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void *twentybytes = ((libthreaddata_t *) data)->twentybytes;
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if (twentybytes)
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free(twentybytes);
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free(data);
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}
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}
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