include/SDL_thread.h
author Ryan C. Gordon <icculus@icculus.org>
Thu, 19 Jan 2006 08:43:00 +0000
changeset 1251 86d0d01290ea
parent 1190 173c063d4f55
child 1312 c9b51268668f
permissions -rw-r--r--
Updated Windows CE/PocketPC support...adds GAPI driver, landscape mode,
updated project files, VS2005 support, VGA mode, more device support, etc,
etc, etc.

Fixes Bugzilla #47 and #28.

--ryan.
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2004 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Library General Public
     7     License as published by the Free Software Foundation; either
     8     version 2 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Library General Public License for more details.
    14 
    15     You should have received a copy of the GNU Library General Public
    16     License along with this library; if not, write to the Free
    17     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 
    23 #ifdef SAVE_RCSID
    24 static char rcsid =
    25  "@(#) $Id$";
    26 #endif
    27 
    28 #ifndef _SDL_thread_h
    29 #define _SDL_thread_h
    30 
    31 /* Header for the SDL thread management routines 
    32 
    33 	These are independent of the other SDL routines.
    34 */
    35 
    36 #include "SDL_main.h"
    37 #include "SDL_types.h"
    38 
    39 /* Thread synchronization primitives */
    40 #include "SDL_mutex.h"
    41 
    42 #include "begin_code.h"
    43 /* Set up for C function definitions, even when using C++ */
    44 #ifdef __cplusplus
    45 extern "C" {
    46 #endif
    47 
    48 /* The SDL thread structure, defined in SDL_thread.c */
    49 struct SDL_Thread;
    50 typedef struct SDL_Thread SDL_Thread;
    51 
    52 /* Create a thread */
    53 #ifdef __OS2__
    54 /*
    55    We compile SDL into a DLL on OS/2. This means, that it's the DLL which
    56    creates a new thread for the calling process with the SDL_CreateThread()
    57    API. There is a problem with this, that only the RTL of the SDL.DLL will
    58    be initialized for those threads, and not the RTL of the calling application!
    59    To solve this, we make a little hack here.
    60    We'll always use the caller's _beginthread() and _endthread() APIs to
    61    start a new thread. This way, it it's the SDL.DLL which uses this API,
    62    then the RTL of SDL.DLL will be used to create the new thread, and if it's
    63    the application, then the RTL of the application will be used.
    64    So, in short:
    65    Always use the _beginthread() and _endthread() of the calling runtime library!
    66 */
    67 
    68 #ifdef __WATCOMC__
    69 #include <process.h> // This has _beginthread() and _endthread() defined!
    70 #endif
    71 #ifdef __EMX__
    72 #include <stdlib.h> // This has _beginthread() and _endthread() defined, if -Zmt flag is used!
    73 #endif
    74 
    75 typedef Uint32 SDLCALL (*pfnSDL_CurrentBeginThread)(void (*pfnThreadFn)(void *), Uint32 uiStackSize, void *pParam);
    76 typedef void   SDLCALL (*pfnSDL_CurrentEndThread)(void);
    77 
    78 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread_Core(int (*fn)(void *), void *data, pfnSDL_CurrentBeginThread pfnBeginThread, pfnSDL_CurrentEndThread pfnEndThread);
    79 
    80 // Disable warnings about unreferenced symbol!
    81 #pragma disable_message (202)
    82 static Uint32 SDLCALL SDL_CurrentBeginThread(void (*pfnThreadFn)(void *), Uint32 uiStackSize, void *pParam)
    83 {
    84   return _beginthread(pfnThreadFn, NULL, uiStackSize, pParam);
    85 }
    86 
    87 static void   SDLCALL SDL_CurrentEndThread(void)
    88 {
    89   _endthread();
    90 }
    91 
    92 #define SDL_CreateThread(fn, data) SDL_CreateThread_Core(fn, data, SDL_CurrentBeginThread, SDL_CurrentEndThread)
    93 
    94 #else
    95 extern DECLSPEC SDL_Thread * SDLCALL SDL_CreateThread(int (SDLCALL *fn)(void *), void *data);
    96 #endif
    97 
    98 /* Get the 32-bit thread identifier for the current thread */
    99 extern DECLSPEC Uint32 SDLCALL SDL_ThreadID(void);
   100 
   101 /* Get the 32-bit thread identifier for the specified thread,
   102    equivalent to SDL_ThreadID() if the specified thread is NULL.
   103  */
   104 extern DECLSPEC Uint32 SDLCALL SDL_GetThreadID(SDL_Thread *thread);
   105 
   106 /* Wait for a thread to finish.
   107    The return code for the thread function is placed in the area
   108    pointed to by 'status', if 'status' is not NULL.
   109  */
   110 extern DECLSPEC void SDLCALL SDL_WaitThread(SDL_Thread *thread, int *status);
   111 
   112 /* Forcefully kill a thread without worrying about its state */
   113 extern DECLSPEC void SDLCALL SDL_KillThread(SDL_Thread *thread);
   114 
   115 
   116 /* Ends C function definitions when using C++ */
   117 #ifdef __cplusplus
   118 }
   119 #endif
   120 #include "close_code.h"
   121 
   122 #endif /* _SDL_thread_h */