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annotate docs/html/sdlpeepevents.html @ 4034:4ea82f5e7e2c SDL-1.2

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Backported the NAS detection from SDL 1.3, replacing the broken NetBSD patch
author Sam Lantinga <slouken@libsdl.org>
date Tue, 10 Jul 2007 14:16:44 +0000
parents 355632dca928
children
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1 <HTML
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2 ><HEAD
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3 ><TITLE
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4 >SDL_PeepEvents</TITLE
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5 ><META
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6 NAME="GENERATOR"
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+
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8 "><LINK
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9 REL="HOME"
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10 TITLE="SDL Library Documentation"
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11 HREF="index.html"><LINK
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12 REL="UP"
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13 TITLE="Event Functions."
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14 HREF="eventfunctions.html"><LINK
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15 REL="PREVIOUS"
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16 TITLE="SDL_PumpEvents"
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17 HREF="sdlpumpevents.html"><LINK
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18 REL="NEXT"
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19 TITLE="SDL_PollEvent"
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20 HREF="sdlpollevent.html"></HEAD
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21 ><BODY
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22 CLASS="REFENTRY"
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23 BGCOLOR="#FFF8DC"
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24 TEXT="#000000"
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25 LINK="#0000ee"
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26 VLINK="#551a8b"
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27 ALINK="#ff0000"
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28 ><DIV
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29 CLASS="NAVHEADER"
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30 ><TABLE
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31 SUMMARY="Header navigation table"
0
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32 WIDTH="100%"
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33 BORDER="0"
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34 CELLPADDING="0"
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35 CELLSPACING="0"
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36 ><TR
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37 ><TH
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38 COLSPAN="3"
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39 ALIGN="center"
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40 >SDL Library Documentation</TH
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41 ></TR
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42 ><TR
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43 ><TD
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44 WIDTH="10%"
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45 ALIGN="left"
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46 VALIGN="bottom"
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47 ><A
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48 HREF="sdlpumpevents.html"
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49 ACCESSKEY="P"
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50 >Prev</A
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51 ></TD
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52 ><TD
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53 WIDTH="80%"
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54 ALIGN="center"
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55 VALIGN="bottom"
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56 ></TD
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57 ><TD
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58 WIDTH="10%"
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59 ALIGN="right"
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60 VALIGN="bottom"
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61 ><A
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62 HREF="sdlpollevent.html"
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63 ACCESSKEY="N"
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64 >Next</A
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65 ></TD
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66 ></TR
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67 ></TABLE
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68 ><HR
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69 ALIGN="LEFT"
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70 WIDTH="100%"></DIV
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71 ><H1
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72 ><A
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73 NAME="SDLPEEPEVENTS"
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74 ></A
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75 >SDL_PeepEvents</H1
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76 ><DIV
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77 CLASS="REFNAMEDIV"
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78 ><A
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79 NAME="AEN5421"
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80 ></A
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81 ><H2
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82 >Name</H2
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83 >SDL_PeepEvents&nbsp;--&nbsp;Checks the event queue for messages and optionally returns them.</DIV
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84 ><DIV
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85 CLASS="REFSYNOPSISDIV"
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86 ><A
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87 NAME="AEN5424"
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88 ></A
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89 ><H2
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90 >Synopsis</H2
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91 ><DIV
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92 CLASS="FUNCSYNOPSIS"
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93 ><A
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94 NAME="AEN5425"
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95 ></A
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96 ><P
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97 ></P
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98 ><PRE
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99 CLASS="FUNCSYNOPSISINFO"
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100 >#include "SDL.h"</PRE
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101 ><P
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102 ><CODE
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103 ><CODE
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104 CLASS="FUNCDEF"
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105 >int <B
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106 CLASS="FSFUNC"
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107 >SDL_PeepEvents</B
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108 ></CODE
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109 >(SDL_Event *events, int numevents, SDL_eventaction action, Uint32 mask);</CODE
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110 ></P
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111 ><P
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112 ></P
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113 ></DIV
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114 ></DIV
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115 ><DIV
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116 CLASS="REFSECT1"
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117 ><A
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118 NAME="AEN5431"
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119 ></A
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120 ><H2
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121 >Description</H2
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122 ><P
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123 >Checks the event queue for messages and optionally returns them.</P
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124 ><P
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125 >If <TT
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126 CLASS="PARAMETER"
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127 ><I
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128 >action</I
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129 ></TT
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130 > is <TT
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131 CLASS="LITERAL"
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132 >SDL_ADDEVENT</TT
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133 >, up to
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134 <TT
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135 CLASS="PARAMETER"
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136 ><I
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137 >numevents</I
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138 ></TT
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139 > events will be added to the back of the event
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140 queue.</P
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141 ><P
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142 >If <TT
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143 CLASS="PARAMETER"
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144 ><I
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145 >action</I
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146 ></TT
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147 > is <TT
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148 CLASS="LITERAL"
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149 >SDL_PEEKEVENT</TT
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150 >, up to
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151 <TT
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152 CLASS="PARAMETER"
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153 ><I
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154 >numevents</I
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155 ></TT
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156 > events at the front of the event queue,
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157 matching <A
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158 HREF="sdlevent.html"
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159 ><TT
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160 CLASS="PARAMETER"
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161 ><I
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162 >mask</I
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163 ></TT
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164 ></A
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165 >,
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166 will be returned and will not be removed from the queue.</P
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167 ><P
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168 >If <TT
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169 CLASS="PARAMETER"
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170 ><I
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171 >action</I
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172 ></TT
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173 > is <TT
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174 CLASS="LITERAL"
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175 >SDL_GETEVENT</TT
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176 >, up to
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177 <TT
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178 CLASS="PARAMETER"
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179 ><I
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180 >numevents</I
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181 ></TT
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182 > events at the front of the event queue,
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183 matching <A
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184 HREF="sdlevent.html"
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185 ><TT
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186 CLASS="PARAMETER"
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187 ><I
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188 >mask</I
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189 ></TT
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190 ></A
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191 >,
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192 will be returned and will be removed from the queue.</P
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193 ><P
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194 >The <TT
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195 CLASS="PARAMETER"
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196 ><I
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197 >mask</I
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198 ></TT
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199 > parameter is an bitwise OR of
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200 <TT
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201 CLASS="LITERAL"
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202 >SDL_EVENTMASK</TT
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203 >(<TT
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204 CLASS="PARAMETER"
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205 ><I
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206 >event_type</I
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207 ></TT
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208 >), for all
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209 event types you are interested in.</P
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210 ><P
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211 >This function is thread-safe.</P
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212 ></DIV
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213 ><DIV
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214 CLASS="REFSECT1"
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215 ><A
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216 NAME="AEN5455"
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217 ></A
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218 ><H2
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219 >Return Value</H2
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220 ><P
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221 >This function returns the number of events actually stored, or
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222 <SPAN
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223 CLASS="RETURNVALUE"
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224 >-1</SPAN
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225 > if there was an error. </P
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226 ></DIV
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227 ><DIV
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228 CLASS="REFSECT1"
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229 ><A
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230 NAME="AEN5459"
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231 ></A
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232 ><H2
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233 >See Also</H2
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234 ><P
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235 ><A
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236 HREF="sdlevent.html"
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237 ><SPAN
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238 CLASS="STRUCTNAME"
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239 >SDL_Event</SPAN
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240 ></A
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241 >,
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242 <A
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243 HREF="sdlpollevent.html"
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244 ><TT
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245 CLASS="FUNCTION"
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246 >SDL_PollEvent</TT
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247 ></A
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248 >,
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249 <A
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250 HREF="sdlpushevent.html"
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251 ><TT
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252 CLASS="FUNCTION"
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253 >SDL_PushEvent</TT
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254 ></A
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255 ></P
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256 ></DIV
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257 ><DIV
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258 CLASS="NAVFOOTER"
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259 ><HR
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260 ALIGN="LEFT"
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261 WIDTH="100%"><TABLE
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262 SUMMARY="Footer navigation table"
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263 WIDTH="100%"
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264 BORDER="0"
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265 CELLPADDING="0"
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266 CELLSPACING="0"
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267 ><TR
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268 ><TD
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269 WIDTH="33%"
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270 ALIGN="left"
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271 VALIGN="top"
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272 ><A
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273 HREF="sdlpumpevents.html"
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274 ACCESSKEY="P"
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275 >Prev</A
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276 ></TD
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277 ><TD
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278 WIDTH="34%"
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279 ALIGN="center"
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280 VALIGN="top"
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281 ><A
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282 HREF="index.html"
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283 ACCESSKEY="H"
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284 >Home</A
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285 ></TD
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286 ><TD
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287 WIDTH="33%"
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288 ALIGN="right"
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289 VALIGN="top"
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290 ><A
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291 HREF="sdlpollevent.html"
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292 ACCESSKEY="N"
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293 >Next</A
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294 ></TD
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295 ></TR
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296 ><TR
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297 ><TD
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298 WIDTH="33%"
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299 ALIGN="left"
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300 VALIGN="top"
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301 >SDL_PumpEvents</TD
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302 ><TD
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303 WIDTH="34%"
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304 ALIGN="center"
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305 VALIGN="top"
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306 ><A
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307 HREF="eventfunctions.html"
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308 ACCESSKEY="U"
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309 >Up</A
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310 ></TD
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311 ><TD
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312 WIDTH="33%"
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313 ALIGN="right"
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314 VALIGN="top"
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315 >SDL_PollEvent</TD
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316 ></TR
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317 ></TABLE
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318 ></DIV
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319 ></BODY
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320 ></HTML
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321 >