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70 | WIDTH="100%"></DIV |
71 | ><H1 |
72 | ><A |
73 | NAME="SDLSEMPOST" |
74 | ></A |
75 | >SDL_SemPost</H1 |
76 | ><DIV |
77 | CLASS="REFNAMEDIV" |
78 | ><A |
79 | NAME="AEN8170" |
80 | ></A |
81 | ><H2 |
82 | >Name</H2 |
83 | >SDL_SemPost -- Unlock a semaphore.</DIV |
84 | ><DIV |
85 | CLASS="REFSYNOPSISDIV" |
86 | ><A |
87 | NAME="AEN8173" |
88 | ></A |
89 | ><H2 |
90 | >Synopsis</H2 |
91 | ><DIV |
92 | CLASS="FUNCSYNOPSIS" |
93 | ><A |
94 | NAME="AEN8174" |
95 | ></A |
96 | ><P |
97 | ></P |
98 | ><PRE |
99 | CLASS="FUNCSYNOPSISINFO" |
100 | >#include "SDL.h" |
101 | #include "SDL_thread.h"</PRE |
102 | ><P |
103 | ><CODE |
104 | ><CODE |
105 | CLASS="FUNCDEF" |
106 | >int <B |
107 | CLASS="FSFUNC" |
108 | >SDL_SemPost</B |
109 | ></CODE |
110 | >(SDL_sem *sem);</CODE |
111 | ></P |
112 | ><P |
113 | ></P |
114 | ></DIV |
115 | ></DIV |
116 | ><DIV |
117 | CLASS="REFSECT1" |
118 | ><A |
119 | NAME="AEN8180" |
120 | ></A |
121 | ><H2 |
122 | >Description</H2 |
123 | ><P |
124 | ><TT |
125 | CLASS="FUNCTION" |
126 | >SDL_SemPost</TT |
127 | > unlocks the semaphore pointed to by |
128 | <TT |
129 | CLASS="PARAMETER" |
130 | ><I |
131 | >sem</I |
132 | ></TT |
133 | > and atomically increments the semaphores value. |
134 | Threads that were blocking on the semaphore may be scheduled after this call |
135 | succeeds.</P |
136 | ><P |
137 | ><TT |
138 | CLASS="FUNCTION" |
139 | >SDL_SemPost</TT |
140 | > should be called after a semaphore is locked by a successful call to |
141 | <A |
142 | HREF="sdlsemwait.html" |
143 | >SDL_SemWait</A |
144 | >, |
145 | <A |
146 | HREF="sdlsemtrywait.html" |
147 | >SDL_SemTryWait</A |
148 | > or |
149 | <A |
150 | HREF="sdlsemwaittimeout.html" |
151 | >SDL_SemWaitTimeout</A |
152 | >.</P |
153 | ></DIV |
154 | ><DIV |
155 | CLASS="REFSECT1" |
156 | ><A |
157 | NAME="AEN8190" |
158 | ></A |
159 | ><H2 |
160 | >Return Value</H2 |
161 | ><P |
162 | >Returns <SPAN |
163 | CLASS="RETURNVALUE" |
164 | >0</SPAN |
165 | > if successful or |
166 | <SPAN |
167 | CLASS="RETURNVALUE" |
168 | >-1</SPAN |
169 | > if there was an error (leaving the semaphore unchanged).</P |
170 | ></DIV |
171 | ><DIV |
172 | CLASS="REFSECT1" |
173 | ><A |
174 | NAME="AEN8195" |
175 | ></A |
176 | ><H2 |
177 | >Examples</H2 |
178 | ><P |
179 | ><PRE |
180 | CLASS="PROGRAMLISTING" |
181 | >SDL_SemPost(my_sem);</PRE |
182 | ></P |
183 | ></DIV |
184 | ><DIV |
185 | CLASS="REFSECT1" |
186 | ><A |
187 | NAME="AEN8199" |
188 | ></A |
189 | ><H2 |
190 | >See Also</H2 |
191 | ><P |
192 | ><A |
193 | HREF="sdlcreatesemaphore.html" |
194 | ><TT |
195 | CLASS="FUNCTION" |
196 | >SDL_CreateSemaphore</TT |
197 | ></A |
198 | >, |
199 | <A |
200 | HREF="sdldestroysemaphore.html" |
201 | ><TT |
202 | CLASS="FUNCTION" |
203 | >SDL_DestroySemaphore</TT |
204 | ></A |
205 | >, |
206 | <A |
207 | HREF="sdlsemwait.html" |
208 | ><TT |
209 | CLASS="FUNCTION" |
210 | >SDL_SemWait</TT |
211 | ></A |
212 | >, |
213 | <A |
214 | HREF="sdlsemtrywait.html" |
215 | ><TT |
216 | CLASS="FUNCTION" |
217 | >SDL_SemTryWait</TT |
218 | ></A |
219 | >, |
220 | <A |
221 | HREF="sdlsemwaittimeout.html" |
222 | ><TT |
223 | CLASS="FUNCTION" |
224 | >SDL_SemWaitTimeout</TT |
225 | ></A |
226 | >, |
227 | <A |
228 | HREF="sdlsemvalue.html" |
229 | ><TT |
230 | CLASS="FUNCTION" |
231 | >SDL_SemValue</TT |
232 | ></A |
233 | ></P |
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264 | ><TD |
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279 | >SDL_SemWaitTimeout</TD |
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