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Posted to dev@tomcat.apache.org by pi...@apache.org on 2001/06/26 03:36:19 UTC
cvs commit: jakarta-tomcat-4.0/service/native dso-dyld.c
pier 01/06/25 18:36:19
Added: service/native dso-dyld.c
Log:
Full UNIX service implementation checkin
Revision Changes Path
1.1 jakarta-tomcat-4.0/service/native/dso-dyld.c
Index: dso-dyld.c
===================================================================
/* ========================================================================= *
* *
* The Apache Software License, Version 1.1 *
* *
* Copyright (c) 1999-2001 The Apache Software Foundation. *
* All rights reserved. *
* *
* ========================================================================= *
* *
* Redistribution and use in source and binary forms, with or without modi- *
* fication, are permitted provided that the following conditions are met: *
* *
* 1. Redistributions of source code must retain the above copyright notice *
* notice, this list of conditions and the following disclaimer. *
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* 2. Redistributions in binary form must reproduce the above copyright *
* notice, this list of conditions and the following disclaimer in the *
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* 3. The end-user documentation included with the redistribution, if any, *
* must include the following acknowlegement: *
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* "This product includes software developed by the Apache Software *
* Foundation <http://www.apache.org/>." *
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* Alternately, this acknowlegement may appear in the software itself, if *
* and wherever such third-party acknowlegements normally appear. *
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* 4. The names "The Jakarta Project", "WebApp", and "Apache Software *
* Foundation" must not be used to endorse or promote products derived *
* from this software without prior written permission. For written *
* permission, please contact <ap...@apache.org>. *
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* 5. Products derived from this software may not be called "Apache" nor may *
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES *
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY *
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE *
* POSSIBILITY OF SUCH DAMAGE. *
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* ========================================================================= *
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* This software consists of voluntary contributions made by many indivi- *
* duals on behalf of the Apache Software Foundation. For more information *
* on the Apache Software Foundation, please see <http://www.apache.org/>. *
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* ========================================================================= */
/* @version $Id: dso-dyld.c,v 1.1 2001/06/26 01:36:18 pier Exp $ */
#include "jsvc.h"
#ifdef DSO_DYLD
#include <mach-o/dyld.h>
/* Print an error message and abort all if a specified symbol wasn't found */
static void nosymbol(const char *s) {
log_error("Cannot find symbol '%s' in library",s);
abort();
}
/* We found two symbols for the same name in two different modules */
static NSModule multiple(NSSymbol s, NSModule om, NSModule nm) {
NSModule ret=nm;
log_debug("Symbol \"%s\" found in modules \"%s\" and \"%s\" (using %s)",
NSNameOfSymbol(s), NSNameOfModule(om), NSNameOfModule(nm),
NSNameOfModule(ret));
return(ret);
}
/* We got an error while linking a module, and if it's not a warning we have
to abort the whole program */
static void linkedit(NSLinkEditErrors category, int number, const char *file,
const char *message) {
log_error("Errors during link edit of file \"%s\" (error=%d): %s", file,
number,message);
/* Check if this error was only a warning */
if (category!=NSLinkEditWarningError) {
log_error("Cannot continue");
abort();
}
}
/* Initialize all DSO stuff */
bool dso_init() {
NSLinkEditErrorHandlers h;
h.undefined=nosymbol;
h.multiple=multiple;
h.linkEdit=linkedit;
NSInstallLinkEditErrorHandlers(&h);
return(true);
}
/* Attempt to link a library from a specified filename */
dso_handle dso_link(const char *path) {
/* We need to load the library publically as NSModuleFileImage is not
yet implemented (at least for non MH_BUNDLE libraries */
if (NSAddLibrary(path)!=TRUE) return(NULL);
/* We need to return a non-null value, even if it has no meaning. One day
this whole crap will be fixed */
return((void *)!NULL);
}
/* Attempt to unload a library */
bool dso_unlink(dso_handle libr) {
/* Check the handle */
if (libr==NULL) {
log_error("Attempting to unload a module without handle");
return(false);
}
/* We don't have a module, so, we don't really have to do anything */
return(true);
}
/* Get the address for a specifed symbol */
void *dso_symbol(dso_handle hdl, const char *nam) {
NSSymbol sym=NULL;
NSModule mod=NULL;
char *und=NULL;
void *add=NULL;
int x=0;
/* Check parameters */
if (hdl==NULL) {
log_error("Invalid library handler specified");
return(NULL);
}
if (nam==NULL) {
log_error("Invalid symbol name specified");
return(NULL);
}
/* Process the correct name (add a _ before the name) */
while (nam[x]!='\0') x++;
und=(char*)malloc(sizeof(char)*(x+2));
while(x>=0) und[x+1]=nam[x--];
und[0]='_';
/* Find the symbol */
sym=NSLookupAndBindSymbol(und);
free(und);
if (sym==NULL) return(NULL);
/* Dump some debugging output since this part is shaky */
mod=NSModuleForSymbol(sym);
add=NSAddressOfSymbol(sym);
log_debug("Symbol \"%s\" found in module \"%s\" at address \"0x%08X\"",
NSNameOfSymbol(sym),NSNameOfModule(mod),add);
/* We want to return the address of the symbol */
return(add);
}
#endif /* ifdef DSO_DYLD */