Mercurial > sdl-ios-xcode
annotate docs/html/sdlkillthread.html @ 765:4c2ba6161939
Editors Note: The original patch was modified to use SDL_Delay() instead of
nanosleep because nanosleep may not be portable to all systems
using SDL with the ALSA backend. This may be a moot point with
the switch to blocking writes anyway...
Date: Sat, 27 Dec 2003 21:47:36 +0100
From: Michel Daenzer
To: Debian Bug Tracking System
Subject: [SDL] Bug#225252: [PATCH] ALSA fixes
Package: libsdl1.2debian-all
Version: 1.2.6-2
Severity: normal
Tags: patch
For SDL 1.2.6, the ALSA backend was changed to call snd_pcm_open() with
SND_PCM_NONBLOCK. That's a good idea per se, however, it causes high CPU
usage, interrupted sound and stuttering in some games here. Taking a nanosleep
whenever snd_pcm_writei() returns -EAGAIN fixes this, but I think it's more
efficient to use blocking mode for the actual sound playback. Feedback from the
SDL and ALSA lists appreciated.
The patch also fixes the default ALSA device to be used.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 04 Jan 2004 15:40:50 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_KillThread</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.64 |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="Multi-threaded Programming" | |
| 14 HREF="thread.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_WaitThread" | |
| 17 HREF="sdlwaitthread.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_CreateMutex" | |
| 20 HREF="sdlcreatemutex.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="REFENTRY" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
| 31 WIDTH="100%" | |
| 32 BORDER="0" | |
| 33 CELLPADDING="0" | |
| 34 CELLSPACING="0" | |
| 35 ><TR | |
| 36 ><TH | |
| 37 COLSPAN="3" | |
| 38 ALIGN="center" | |
| 39 >SDL Library Documentation</TH | |
| 40 ></TR | |
| 41 ><TR | |
| 42 ><TD | |
| 43 WIDTH="10%" | |
| 44 ALIGN="left" | |
| 45 VALIGN="bottom" | |
| 46 ><A | |
| 47 HREF="sdlwaitthread.html" | |
| 48 >Prev</A | |
| 49 ></TD | |
| 50 ><TD | |
| 51 WIDTH="80%" | |
| 52 ALIGN="center" | |
| 53 VALIGN="bottom" | |
| 54 ></TD | |
| 55 ><TD | |
| 56 WIDTH="10%" | |
| 57 ALIGN="right" | |
| 58 VALIGN="bottom" | |
| 59 ><A | |
| 60 HREF="sdlcreatemutex.html" | |
| 61 >Next</A | |
| 62 ></TD | |
| 63 ></TR | |
| 64 ></TABLE | |
| 65 ><HR | |
| 66 ALIGN="LEFT" | |
| 67 WIDTH="100%"></DIV | |
| 68 ><H1 | |
| 69 ><A | |
| 70 NAME="SDLKILLTHREAD" | |
| 71 >SDL_KillThread</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN7406" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_KillThread -- Gracelessly terminates the thread.</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
|
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84 NAME="AEN7409" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
|
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91 NAME="AEN7410" |
| 0 | 92 ></A |
| 93 ><P | |
| 94 ></P | |
| 95 ><PRE | |
| 96 CLASS="FUNCSYNOPSISINFO" | |
| 97 >#include "SDL.h" | |
| 98 #include "SDL_thread.h"</PRE | |
| 99 ><P | |
| 100 ><CODE | |
| 101 ><CODE | |
| 102 CLASS="FUNCDEF" | |
| 103 >void <B | |
| 104 CLASS="FSFUNC" | |
| 105 >SDL_KillThread</B | |
| 106 ></CODE | |
| 107 >(SDL_Thread *thread);</CODE | |
| 108 ></P | |
| 109 ><P | |
| 110 ></P | |
| 111 ></DIV | |
| 112 ></DIV | |
| 113 ><DIV | |
| 114 CLASS="REFSECT1" | |
| 115 ><A | |
|
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116 NAME="AEN7416" |
| 0 | 117 ></A |
| 118 ><H2 | |
| 119 >Description</H2 | |
| 120 ><P | |
| 121 ><TT | |
| 122 CLASS="FUNCTION" | |
| 123 >SDL_KillThread</TT | |
| 124 > gracelessly terminates the thread | |
| 125 associated with <TT | |
| 126 CLASS="PARAMETER" | |
| 127 ><I | |
| 128 >thread</I | |
| 129 ></TT | |
| 130 >. If possible, you should | |
| 131 use some other form of IPC to signal the thread to quit.</P | |
| 132 ></DIV | |
| 133 ><DIV | |
| 134 CLASS="REFSECT1" | |
| 135 ><A | |
|
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136 NAME="AEN7421" |
| 0 | 137 ></A |
| 138 ><H2 | |
| 139 >See Also</H2 | |
| 140 ><P | |
| 141 ><A | |
| 142 HREF="sdlcreatethread.html" | |
| 143 ><TT | |
| 144 CLASS="FUNCTION" | |
| 145 >SDL_CreateThread</TT | |
| 146 ></A | |
| 147 >, | |
| 148 <A | |
| 149 HREF="sdlwaitthread.html" | |
| 150 ><TT | |
| 151 CLASS="FUNCTION" | |
| 152 >SDL_WaitThread</TT | |
| 153 ></A | |
| 154 ></P | |
| 155 ></DIV | |
| 156 ><DIV | |
| 157 CLASS="NAVFOOTER" | |
| 158 ><HR | |
| 159 ALIGN="LEFT" | |
| 160 WIDTH="100%"><TABLE | |
| 161 WIDTH="100%" | |
| 162 BORDER="0" | |
| 163 CELLPADDING="0" | |
| 164 CELLSPACING="0" | |
| 165 ><TR | |
| 166 ><TD | |
| 167 WIDTH="33%" | |
| 168 ALIGN="left" | |
| 169 VALIGN="top" | |
| 170 ><A | |
| 171 HREF="sdlwaitthread.html" | |
| 172 >Prev</A | |
| 173 ></TD | |
| 174 ><TD | |
| 175 WIDTH="34%" | |
| 176 ALIGN="center" | |
| 177 VALIGN="top" | |
| 178 ><A | |
| 179 HREF="index.html" | |
| 180 >Home</A | |
| 181 ></TD | |
| 182 ><TD | |
| 183 WIDTH="33%" | |
| 184 ALIGN="right" | |
| 185 VALIGN="top" | |
| 186 ><A | |
| 187 HREF="sdlcreatemutex.html" | |
| 188 >Next</A | |
| 189 ></TD | |
| 190 ></TR | |
| 191 ><TR | |
| 192 ><TD | |
| 193 WIDTH="33%" | |
| 194 ALIGN="left" | |
| 195 VALIGN="top" | |
| 196 >SDL_WaitThread</TD | |
| 197 ><TD | |
| 198 WIDTH="34%" | |
| 199 ALIGN="center" | |
| 200 VALIGN="top" | |
| 201 ><A | |
| 202 HREF="thread.html" | |
| 203 >Up</A | |
| 204 ></TD | |
| 205 ><TD | |
| 206 WIDTH="33%" | |
| 207 ALIGN="right" | |
| 208 VALIGN="top" | |
| 209 >SDL_CreateMutex</TD | |
| 210 ></TR | |
| 211 ></TABLE | |
| 212 ></DIV | |
| 213 ></BODY | |
| 214 ></HTML | |
| 215 > |