Mercurial > sdl-ios-xcode
annotate src/thread/amigaos/SDL_systhread.c @ 968:4675910b0b7b
Date: Mon, 11 Oct 2004 15:17:27 +0300 (EEST)
From: Hannu Savolainen
Subject: Re: SDL uses obsolete OSS features
I did some work on getting OSS to work better with SDL. There have been
some problems with select which should be fixed now.
I'm having some problems in understanding what is the purpose of the
DSP_WaitAudio() routine. I added a return to the very beginning of this
routine and commendted out the define for USE_BLOCKING_WRITES. At least
lbreakout2 seems to work as well as earlier. The latencies are the same.
An ordinary blocking write does exactly the same thing than DSP_WaitAudio
does. So I would recommend using the USE_BLOCKING_WRITES approach and
removing everything from the DSP_WaitAudio routine. Also enabling
USE_BLOCKING_WRITES makes it possible to simplify DSP_PlayAudio() because
you don't need to handle the partial writes (the do-while loop).
Attached is a patch against SDL-1.2.7. After these changes SDL will use
OSS as it's designed to be used (make it as simple as possible). This code
should work with all OSS implementations because it uses only the very
fundamental features that have been there since the jurassic times.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 12 Nov 2004 21:39:04 +0000 |
| parents | b8d311d90021 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
769
b8d311d90021
Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 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 | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
21
diff
changeset
|
20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
|
21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
28 /* BeOS thread management routines for SDL */ |
| 0 | 29 |
| 30 #include "SDL_error.h" | |
| 31 #include "SDL_mutex.h" | |
| 32 #include "SDL_thread.h" | |
| 33 #include "SDL_thread_c.h" | |
| 34 #include "SDL_systhread.h" | |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
35 #include "mydebug.h" |
| 0 | 36 |
| 37 typedef struct { | |
| 38 int (*func)(void *); | |
| 39 void *data; | |
| 40 SDL_Thread *info; | |
| 41 struct Task *wait; | |
| 42 } thread_args; | |
| 43 | |
|
21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
44 #ifndef MORPHOS |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
45 |
| 0 | 46 #if defined(__SASC) && !defined(__PPC__) |
| 47 __saveds __asm Uint32 RunThread(register __a0 char *args ) | |
| 48 #elif defined(__PPC__) | |
| 49 Uint32 RunThread(char *args) | |
| 50 #else | |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
51 Uint32 __saveds RunThread(char *args __asm("a0") ) |
| 0 | 52 #endif |
| 53 { | |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
54 #ifdef STORMC4_WOS |
|
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
55 thread_args *data=(thread_args *)args; |
|
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
56 #else |
| 0 | 57 thread_args *data=(thread_args *)atol(args); |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
58 #endif |
|
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
59 |
| 0 | 60 struct Task *Father; |
| 61 | |
| 62 D(bug("Received data: %lx\n",data)); | |
| 63 Father=data->wait; | |
| 64 | |
| 65 SDL_RunThread(data); | |
| 66 | |
| 67 Signal(Father,SIGBREAKF_CTRL_F); | |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
68 D(bug("Thread with data %lx ended\n",data)); |
| 0 | 69 return(0); |
| 70 } | |
| 71 | |
|
21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
72 #else |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
73 |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
74 #include <emul/emulinterface.h> |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
75 |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
76 Uint32 RunTheThread(void) |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
77 { |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
78 thread_args *data=(thread_args *)atol((char *)REG_A0); |
|
21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
79 struct Task *Father; |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
80 |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
81 D(bug("Received data: %lx\n",data)); |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
82 Father=data->wait; |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
83 |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
84 SDL_RunThread(data); |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
85 |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
86 Signal(Father,SIGBREAKF_CTRL_F); |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
87 D(bug("Thread with data %lx ended\n",data)); |
|
21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
88 return(0); |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
89 } |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
90 |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
91 struct EmulLibEntry RunThreadStruct= |
|
21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
92 { |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
93 TRAP_LIB, |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
94 0, |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
95 (ULONG)RunTheThread |
|
21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
96 }; |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
97 |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
98 void *RunThread=&RunThreadStruct; |
|
21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
99 #endif |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
100 |
|
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
101 |
| 0 | 102 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) |
| 103 { | |
| 104 /* Create the thread and go! */ | |
| 105 char buffer[20]; | |
| 106 | |
| 107 D(bug("Sending %lx to the new thread...\n",args)); | |
| 108 | |
| 109 if(args) | |
| 110 sprintf(buffer,"%ld",args); | |
| 111 | |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
112 #ifdef STORMC4_WOS |
|
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
113 thread->handle=CreateTaskPPCTags(TASKATTR_CODE, RunThread, |
|
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
114 TASKATTR_NAME, "SDL subtask", |
|
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
115 TASKATTR_STACKSIZE, 100000, |
|
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
116 (args ? TASKATTR_R3 : TAG_IGNORE), args, |
|
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
117 TASKATTR_INHERITR2, TRUE, |
|
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
118 TAG_DONE); |
|
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
119 #else |
| 0 | 120 thread->handle=(struct Task *)CreateNewProcTags(NP_Output,Output(), |
| 121 NP_Name,(ULONG)"SDL subtask", | |
| 122 NP_CloseOutput, FALSE, | |
| 123 NP_StackSize,20000, | |
| 124 NP_Entry,(ULONG)RunThread, | |
| 125 args ? NP_Arguments : TAG_IGNORE,(ULONG)buffer, | |
| 126 TAG_DONE); | |
|
255
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
127 #endif |
|
dcb5e869f8b5
Updated Amiga port by Gabriele Greco
Sam Lantinga <slouken@libsdl.org>
parents:
252
diff
changeset
|
128 |
| 0 | 129 if(!thread->handle) |
| 130 { | |
| 131 SDL_SetError("Not enough resources to create thread"); | |
| 132 return(-1); | |
| 133 } | |
| 134 | |
| 135 return(0); | |
| 136 } | |
| 137 | |
| 138 void SDL_SYS_SetupThread(void) | |
| 139 { | |
| 140 } | |
| 141 | |
| 142 Uint32 SDL_ThreadID(void) | |
| 143 { | |
| 144 return((Uint32)FindTask(NULL)); | |
| 145 } | |
| 146 | |
| 147 void SDL_SYS_WaitThread(SDL_Thread *thread) | |
| 148 { | |
|
21
75a95f82bc1f
Updated the Amiga OS port of SDL (thanks Gabriele)
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
149 SetSignal(0L,SIGBREAKF_CTRL_F|SIGBREAKF_CTRL_C); |
| 0 | 150 Wait(SIGBREAKF_CTRL_F|SIGBREAKF_CTRL_C); |
| 151 } | |
| 152 | |
| 153 void SDL_SYS_KillThread(SDL_Thread *thread) | |
| 154 { | |
| 155 Signal((struct Task *)thread->handle,SIGBREAKF_CTRL_C); | |
| 156 } |