Short: Fixes OpenWB() hangs,IPrefs and WB bugs Author: thor@math.tu-berlin.de Uploader: thor math tu-berlin de Type: util/boot Version: 1.01 Requires: WB 3.0 or 3.1 (V39 or V40). Architecture: m68k-amigaos ____________________________________________________________________________ Changes made: 1.01 fixes a race condition indroduced with the 1.00, hopefully... ___________________________________________________________________________ This patch fixes two workbench related bugs: - first, adding AppIcons with the workbench.library while the workbench screen is closed crashes the system. This bug is fixed by opening the workbench first. - the OpenWorkBench() call hangs from time to time. Some fixes have been available from time to time, but none of them seem to attack the bug at its real roots. This IS NOT a task priority problem, but a real bug in IPrefs which locks two semaphores in the wrong order. For details, study the source code included. Another remark: This is supposed to be a simple patch, the programming techiques used here SHOULD NOT be used in a serious application. It uses some internal intuition details and self modifying code to install the patch, needed to fix the bug.PLEASE DON'T TRY THIS YOURSELF! The patch will disable itself if a newer (post V40) workbench.library is available, you should also remove it as soon as a newer version of IPrefs or SetPatch gets available! SetPatch 43.6 and IPrefs 40.7 ARE NOT GOOD ENOUGH to prevent this hang. January 1998 Thomas Richter ____________________________________________________________________________ The THOR-Software Licence This License applies to the computer programs known as "PatchWB". The "Program", below, refers to such program. The programs and files in this distribution are freely distributable under the restrictions stated below, but are also Copyright (c) Thomas Richter. Distribution of the Program by a commercial organization without written permission from the author to any third party is prohibited if any payment is made in connection with such distribution, whether directly (as in payment for a copy of the Program) or indirectly (as in payment for some service related to the Program, or payment for some product or service that includes a copy of the Program "without charge"; these are only examples, and not an exhaustive enumeration of prohibited activities). However, the following methods of distribution involving payment shall not in and of themselves be a violation of this restriction: (i) Posting the Program on a public access information storage and retrieval service for which a fee is received for retrieving information (such as an on-line service), provided that the fee is not content-dependent (i.e., the fee would be the same for retrieving the same volume of information consisting of random data). (ii) Distributing the Program on a CD-ROM, provided that the files containing the Program are reproduced entirely and verbatim on such CD-ROM, and provided further that all information on such CD-ROM be redistributable for non-commercial purposes without charge. Everything in this distribution must be kept together, in original and unmodified form. Limitations. THE PROGRAM IS PROVIDED TO YOU "AS IS," WITHOUT WARRANTY. THERE IS NO WARRANTY FOR THE PROGRAM, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. IF YOU DO NOT ACCEPT THIS LICENCE, YOU MUST DELETE ALL FILES CONTAINED IN THIS ARCHIVE. _____________________________________________________________________________