mirror of
https://github.com/moparisthebest/curl
synced 2024-08-13 17:03:50 -04:00
94400f32e9
When a zeroed out allocation is required, use calloc() rather than malloc() followed by an explicit memset(). The result will be the same, but using calloc() everywhere increases consistency in the codebase and avoids the risk of subtle bugs when code is injected between malloc and memset by accident. Closes https://github.com/curl/curl/pull/2497
326 lines
9.3 KiB
C
326 lines
9.3 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 - 2016, 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 https://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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***************************************************************************/
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#include "curl_setup.h"
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#ifdef NETWARE /* Novell NetWare */
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#ifdef __NOVELL_LIBC__
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/* For native LibC-based NLM we need to register as a real lib. */
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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 "curl_memory.h"
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/* The last #include file should be: */
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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
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* support 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
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* per-thread data. Of course, just in case a thread from this same
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* application is calling us simultaneously, we better lock our application
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* data-creation mutex. We also need to recheck for data after we acquire
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* the lock because WE might be that other thread that was too late to
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* create the data and the first thread in will have created it.
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*/
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NXLock(gLibLock);
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app_data = (libdata_t *) get_app_data(id);
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if(!app_data) {
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app_data = calloc(1, sizeof(libdata_t));
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if(app_data) {
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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
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* by calling get_app_data(). Next time we call the first function,
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* we'll get this data we're just now setting. We also go on here to
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* establish the per-thread data for the calling thread, something
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* we'll have to do on each application thread the first time
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* 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
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* whether there was already application data or not, this may be the
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* first call by a new thread. The fact that we allocation 20 bytes on
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* a pointer is not very important, this just helps to demonstrate that
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* we can have arbitrarily complex per-thread data.
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*/
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thread_data = 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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err = NXKeySetValue(key, thread_data);
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if(err) {
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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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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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free(twentybytes);
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free(data);
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}
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}
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#else /* __NOVELL_LIBC__ */
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/* For native CLib-based NLM seems we can do a bit more simple. */
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#include <nwthread.h>
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int main(void)
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{
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/* initialize any globals here... */
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/* do this if any global initializing was done
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SynchronizeStart();
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*/
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ExitThread(TSR_THREAD, 0);
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return 0;
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}
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#endif /* __NOVELL_LIBC__ */
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#else /* NETWARE */
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#ifdef __POCC__
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# pragma warn(disable:2024) /* Disable warning #2024: Empty input file */
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#endif
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#endif /* NETWARE */
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