Mercurial > sdl-ios-xcode
view src/SDL_loadso.c @ 615:7ec821f3cbd0
Date: Thu, 17 Apr 2003 23:27:34 -0400
From: Darrell Walisser
Subject: Yet another OS X cursor bug
The synopsis:
1. Call SDL_ShowCursor(0);
2. Call SDL_SetVideoMode();
3. Call SDL_GetEvent();
3. Call SDL_ShowCursor(1);
The result: Sometimes the cursor doesn't come back! Ack! Oddly enough,
it does come back when mousing over the dock or clicking in the menu
bar. But that's besides the point.
The reason why this is happening is a flaw in the handling of
activation/deactivation events. The short explanation is that the
HideCursor() and ShowCursor() calls must be balanced, but if the cursor
was initially hidden, HideCursor() was called again on the activate
event - so now the next ShowCursor() fails (as does the next, and the
next, for some reason).
So, here's the patch. All it does is keep track of the
HideCursor()/ShowCursor() calls so that they will always be balanced.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 20 Apr 2003 05:41:16 +0000 |
parents | 745873ea091f |
children | 35ff0890ac4e |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /* System dependent library loading routines */ #include <stdio.h> #if defined(USE_DLOPEN) # include <dlfcn.h> #elif defined(WIN32) # include <windows.h> #elif defined(__BEOS__) # include <be/kernel/image.h> #elif defined(macintosh) # include <string.h> # include <Strings.h> # include <CodeFragments.h> # include <Errors.h> #else /*#error Unsupported dynamic link environment*/ #endif /* system type */ #include "SDL_types.h" #include "SDL_error.h" #include "SDL_loadso.h" void *SDL_LoadObject(const char *sofile) { void *handle = NULL; const char *loaderror = "SDL_LoadObject() not implemented"; #if defined(USE_DLOPEN) /* * */ handle = dlopen(sofile, RTLD_NOW); loaderror = (char *)dlerror(); #elif defined(WIN32) /* * */ char errbuf[512]; handle = (void *)LoadLibrary(sofile); /* Generate an error message if all loads failed */ if ( handle == NULL ) { FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM), NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), errbuf, SDL_TABLESIZE(errbuf), NULL); loaderror = errbuf; } #elif defined(__BEOS__) /* * */ image_id library_id; library_id = load_add_on(sofile); if ( library_id == B_ERROR ) { loaderror = "BeOS error"; } else { handle = (void *)(library_id); } #elif defined(macintosh) /* * */ CFragConnectionID library_id; Ptr mainAddr; Str255 errName; OSErr error; char psofile[512]; strncpy(psofile, sofile, SDL_TABLESIZE(psofile)); psofile[SDL_TABLESIZE(psofile)-1] = '\0'; error = GetSharedLibrary(C2PStr(psofile), kCompiledCFragArch, kLoadCFrag, &library_id, &mainAddr, errName); switch (error) { case noErr: break; case cfragNoLibraryErr: loaderror = "Library not found"; break; case cfragUnresolvedErr: loaderror = "Unabled to resolve symbols"; break; case cfragNoPrivateMemErr: case cfragNoClientMemErr: loaderror = "Out of memory"; break; default: loaderror = "Unknown Code Fragment Manager error"; break; } if ( loaderror == NULL ) { handle = (void *)(library_id); } #endif /* system type */ if ( handle == NULL ) { SDL_SetError("Failed loading %s: %s", sofile, loaderror); } return(handle); } void *SDL_LoadFunction(void *handle, const char *name) { void *symbol = NULL; const char *loaderror = "SDL_LoadFunction not implemented"; #if defined(USE_DLOPEN) /* * */ symbol = dlsym(handle, name); if ( symbol == NULL ) { loaderror = (char *)dlerror(); } #elif defined(WIN32) /* * */ char errbuf[512]; symbol = (void *)GetProcAddress((HMODULE)handle, name); if ( symbol == NULL ) { FormatMessage((FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_FROM_SYSTEM), NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), errbuf, SDL_TABLESIZE(errbuf), NULL); loaderror = errbuf; } #elif defined(__BEOS__) /* * */ image_id library_id = (image_id)handle; if ( get_image_symbol(library_id, name, B_SYMBOL_TYPE_TEXT, &symbol) != B_NO_ERROR ) { loaderror = "Symbol not found"; } #elif defined(macintosh) /* * */ CFragSymbolClass class; CFragConnectionID library_id = (CFragConnectionID)handle; char pname[512]; strncpy(pname, name, SDL_TABLESIZE(pname)); pname[SDL_TABLESIZE(pname)-1] = '\0'; if ( FindSymbol(library_id, C2PStr(pname), (char **)&symbol, &class) != noErr ) { loaderror = "Symbol not found"; } #endif /* system type */ if ( symbol == NULL ) { SDL_SetError("Failed loading %s: %s", name, loaderror); } return(symbol); } void SDL_UnloadObject(void *handle) { #if defined(__BEOS__) image_id library_id; #endif if ( handle == NULL ) { return; } #if defined(USE_DLOPEN) /* * */ dlclose(handle); #elif defined(WIN32) /* * */ FreeLibrary((HMODULE)handle); #elif defined(__BEOS__) /* * */ library_id = (image_id)handle; unload_add_on(library_id); #elif defined(macintosh) /* * */ CFragConnectionID library_id = (CFragConnectionID)handle; CloseConnection(library_id); #endif /* system type */ }