Mercurial > sdl-ios-xcode
annotate docs/html/sdlfreecursor.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_FreeCursor</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="Video" | |
| 14 HREF="video.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL_CreateCursor" | |
| 17 HREF="sdlcreatecursor.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_SetCursor" | |
| 20 HREF="sdlsetcursor.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="sdlcreatecursor.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="sdlsetcursor.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="SDLFREECURSOR" | |
| 71 >SDL_FreeCursor</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN2156" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_FreeCursor -- Frees a cursor created with SDL_CreateCursor.</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSYNOPSISDIV" | |
| 83 ><A | |
|
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84 NAME="AEN2159" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Synopsis</H2 | |
| 88 ><DIV | |
| 89 CLASS="FUNCSYNOPSIS" | |
| 90 ><A | |
|
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91 NAME="AEN2160" |
| 0 | 92 ></A |
| 93 ><P | |
| 94 ></P | |
| 95 ><PRE | |
| 96 CLASS="FUNCSYNOPSISINFO" | |
| 97 >#include "SDL.h"</PRE | |
| 98 ><P | |
| 99 ><CODE | |
| 100 ><CODE | |
| 101 CLASS="FUNCDEF" | |
| 102 >void <B | |
| 103 CLASS="FSFUNC" | |
| 104 >SDL_FreeCursor</B | |
| 105 ></CODE | |
| 106 >(SDL_Cursor *cursor);</CODE | |
| 107 ></P | |
| 108 ><P | |
| 109 ></P | |
| 110 ></DIV | |
| 111 ></DIV | |
| 112 ><DIV | |
| 113 CLASS="REFSECT1" | |
| 114 ><A | |
|
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115 NAME="AEN2166" |
| 0 | 116 ></A |
| 117 ><H2 | |
| 118 >Description</H2 | |
| 119 ><P | |
| 120 >Frees a <SPAN | |
| 121 CLASS="STRUCTNAME" | |
| 122 >SDL_Cursor</SPAN | |
| 123 > that was created using | |
| 124 <A | |
| 125 HREF="sdlcreatecursor.html" | |
| 126 >SDL_CreateCursor</A | |
| 127 >.</P | |
| 128 ></DIV | |
| 129 ><DIV | |
| 130 CLASS="REFSECT1" | |
| 131 ><A | |
|
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132 NAME="AEN2171" |
| 0 | 133 ></A |
| 134 ><H2 | |
| 135 >See Also</H2 | |
| 136 ><P | |
| 137 ><A | |
| 138 HREF="sdlcreatecursor.html" | |
| 139 >SDL_CreateCursor</A | |
| 140 ></P | |
| 141 ></DIV | |
| 142 ><DIV | |
| 143 CLASS="NAVFOOTER" | |
| 144 ><HR | |
| 145 ALIGN="LEFT" | |
| 146 WIDTH="100%"><TABLE | |
| 147 WIDTH="100%" | |
| 148 BORDER="0" | |
| 149 CELLPADDING="0" | |
| 150 CELLSPACING="0" | |
| 151 ><TR | |
| 152 ><TD | |
| 153 WIDTH="33%" | |
| 154 ALIGN="left" | |
| 155 VALIGN="top" | |
| 156 ><A | |
| 157 HREF="sdlcreatecursor.html" | |
| 158 >Prev</A | |
| 159 ></TD | |
| 160 ><TD | |
| 161 WIDTH="34%" | |
| 162 ALIGN="center" | |
| 163 VALIGN="top" | |
| 164 ><A | |
| 165 HREF="index.html" | |
| 166 >Home</A | |
| 167 ></TD | |
| 168 ><TD | |
| 169 WIDTH="33%" | |
| 170 ALIGN="right" | |
| 171 VALIGN="top" | |
| 172 ><A | |
| 173 HREF="sdlsetcursor.html" | |
| 174 >Next</A | |
| 175 ></TD | |
| 176 ></TR | |
| 177 ><TR | |
| 178 ><TD | |
| 179 WIDTH="33%" | |
| 180 ALIGN="left" | |
| 181 VALIGN="top" | |
| 182 >SDL_CreateCursor</TD | |
| 183 ><TD | |
| 184 WIDTH="34%" | |
| 185 ALIGN="center" | |
| 186 VALIGN="top" | |
| 187 ><A | |
| 188 HREF="video.html" | |
| 189 >Up</A | |
| 190 ></TD | |
| 191 ><TD | |
| 192 WIDTH="33%" | |
| 193 ALIGN="right" | |
| 194 VALIGN="top" | |
| 195 >SDL_SetCursor</TD | |
| 196 ></TR | |
| 197 ></TABLE | |
| 198 ></DIV | |
| 199 ></BODY | |
| 200 ></HTML | |
| 201 > |