diff options
Diffstat (limited to 'lib/nwlib.c')
| -rw-r--r-- | lib/nwlib.c | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/lib/nwlib.c b/lib/nwlib.c new file mode 100644 index 000000000..410a6311b --- /dev/null +++ b/lib/nwlib.c @@ -0,0 +1,329 @@ +/***************************************************************************
+ * _ _ ____ _
+ * 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.
+ *
+ * $Id$
+ ***************************************************************************/
+
+/* This file is only used in the NetWare build */
+
+#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>
+
+
+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;
+}
+
+void _NonAppStop( void )
+{
+/*
+** 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) unregister_library(gLibId);
+ NXMutexFree(gLibLock);
+}
+
+int _NonAppCheckUnload( void )
+{
+/*
+** 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.
+*/
+ 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;
+// NXMutex_t *lock;
+ 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);
+ }
+}
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