gecko/xpcom/base/nsObjCExceptions.h
2008-02-22 13:26:33 -08:00

150 lines
6.1 KiB
Objective-C

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Corporation.
* Portions created by the Initial Developer are Copyright (C) 2008
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Josh Aas <josh@mozilla.com>
* Robert O'Callahan <robert@ocallahan.org>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsObjCExceptions_h_
#define nsObjCExceptions_h_
#import <Foundation/NSException.h>
#import <Foundation/NSObjCRuntime.h>
#include <unistd.h>
#include <signal.h>
#include "nsError.h"
// See Mozilla bug 163260.
// This file can only be included in an Objective-C context.
static void nsObjCExceptionLog(NSException *e)
{
NSLog(@"%@: %@", [e name], [e reason]);
}
static void nsObjCExceptionAbort()
{
// We need to raise a mach-o signal here, the Mozilla crash reporter on
// Mac OS X does not respond to POSIX signals. Raising mach-o signals directly
// is tricky so we do it by just derefing a null pointer.
int* foo = NULL;
*foo = 1;
}
static void nsObjCExceptionLogAbort(NSException *e)
{
nsObjCExceptionLog(e);
nsObjCExceptionAbort();
}
#define NS_OBJC_TRY(_e, _fail) \
@try { _e; } \
@catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
_fail; \
}
#define NS_OBJC_TRY_EXPR(_e, _fail) \
({ \
typeof(_e) _tmp; \
@try { _tmp = (_e); } \
@catch(NSException *_exn) { \
nsObjCExceptionLog(_exn); \
_fail; \
} \
_tmp; \
})
#define NS_OBJC_TRY_EXPR_NULL(_e) \
NS_OBJC_TRY_EXPR(_e, 0)
#define NS_OBJC_TRY_IGNORE(_e) \
NS_OBJC_TRY(_e, )
// To reduce code size the abort versions do not reuse above macros. This allows
// catch blocks to only contain one call.
#define NS_OBJC_TRY_ABORT(_e) \
@try { _e; } \
@catch(NSException *_exn) { \
nsObjCExceptionLogAbort(_exn); \
}
#define NS_OBJC_TRY_EXPR_ABORT(_e) \
({ \
typeof(_e) _tmp; \
@try { _tmp = (_e); } \
@catch(NSException *_exn) { \
nsObjCExceptionLogAbort(_exn); \
} \
_tmp; \
})
// For wrapping blocks of Obj-C calls. Terminates app after logging.
#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK @try {
#define NS_OBJC_END_TRY_ABORT_BLOCK } @catch(NSException *_exn) { \
nsObjCExceptionLogAbort(_exn); \
}
// Same as above ABORT_BLOCK but returns a value after the try/catch block to
// suppress compiler warnings. This allows us to avoid having to refactor code
// to get scoping right when wrapping an entire method.
#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NIL @try {
#define NS_OBJC_END_TRY_ABORT_BLOCK_NIL } @catch(NSException *_exn) { \
nsObjCExceptionLogAbort(_exn); \
} \
return nil;
#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSNULL @try {
#define NS_OBJC_END_TRY_ABORT_BLOCK_NSNULL } @catch(NSException *_exn) { \
nsObjCExceptionLogAbort(_exn); \
} \
return nsnull;
#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_NSRESULT @try {
#define NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT } @catch(NSException *_exn) { \
nsObjCExceptionLogAbort(_exn);\
} \
return NS_ERROR_FAILURE;
#define NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN @try {
#define NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(_rv) } @catch(NSException *_exn) { \
nsObjCExceptionLogAbort(_exn);\
} \
return _rv;
#endif // nsObjCExceptions_h_