diff options
| -rw-r--r-- | lib/nwlib.c | 600 |
1 files changed, 300 insertions, 300 deletions
diff --git a/lib/nwlib.c b/lib/nwlib.c index 2dd0f4fa5..b0eea56c7 100644 --- a/lib/nwlib.c +++ b/lib/nwlib.c @@ -1,300 +1,300 @@ -/***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 1998 - 2004, 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.
- *
- * $Id$
- ***************************************************************************/
-
-#include <errno.h>
-#include <string.h>
-#include <stdlib.h>
-#include <library.h>
-#include <netware.h>
-#include <screen.h>
-#include <nks/thread.h>
-#include <nks/synch.h>
-
-#include "memory.h"
-#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 = (libdata_t *) 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 = (libthreaddata_t *) 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);
- }
-}
+/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2004, 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. + * + * $Id$ + ***************************************************************************/ + +#include <errno.h> +#include <string.h> +#include <stdlib.h> +#include <library.h> +#include <netware.h> +#include <screen.h> +#include <nks/thread.h> +#include <nks/synch.h> + +#include "memory.h" +#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 = (libdata_t *) 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 = (libthreaddata_t *) 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); + } +} |