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annotate include/SDL_loadso.h @ 649:81c74904f51f

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Added some notes from the benefit of my experience. :)
author Sam Lantinga <slouken@libsdl.org>
date Thu, 10 Jul 2003 07:56:19 +0000
parents 12a21d82a060
children b8d311d90021
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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29 /* System dependent library loading routines */
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30
649
81c74904f51f Added some notes from the benefit of my experience. :)
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31 /* Some things to keep in mind:
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32 - These functions only work on C function names. Other languages may
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33 have name mangling and intrinsic language support that varies from
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34 compiler to compiler.
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35 - Make sure you declare your function pointers with the same calling
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36 convention as the actual library function. Your code will crash
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37 mysteriously if you do not do this.
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38 - Avoid namespace collisions. If you load a symbol from the library,
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39 it is not defined whether or not it goes into the global symbol
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40 namespace for the application. If it does and it conflicts with
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41 symbols in your code or other shared libraries, you will not get
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42 the results you expect. :)
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43 */
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44
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45
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46 #ifndef _SDL_loadso_h
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47 #define _SDL_loadso_h
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48
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49 #include "begin_code.h"
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50 /* Set up for C function definitions, even when using C++ */
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51 #ifdef __cplusplus
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52 extern "C" {
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53 #endif
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54
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55 /* This function dynamically loads a shared object and returns a pointer
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56 * to the object handle (or NULL if there was an error).
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57 * The 'sofile' parameter is a system dependent name of the object file.
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58 */
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59 extern DECLSPEC void * SDLCALL SDL_LoadObject(const char *sofile);
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60
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61 /* Given an object handle, this function looks up the address of the
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62 * named function in the shared object and returns it. This address
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63 * is no longer valid after calling SDL_UnloadObject().
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64 */
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65 extern DECLSPEC void * SDLCALL SDL_LoadFunction(void *handle, const char *name);
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66
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67 /* Unload a shared object from memory */
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68 extern DECLSPEC void SDLCALL SDL_UnloadObject(void *handle);
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69
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70 /* Ends C function definitions when using C++ */
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71 #ifdef __cplusplus
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72 }
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73 #endif
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74 #include "close_code.h"
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75
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76 #endif /* _SDL_loadso_h */