SDL_SemWait.html

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   9 <title>SDL_SemWait</title>
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  12 <a href="index.html">\96Ú\8e\9f</a> - <a href="ApiByCategory.html">API(\8b@\94\\95Ê)</a> - <a href="CategoryMutex.html">\93¯\8aú\83v\83\8a\83~\83e\83B\83u</a> - SDL_SemWait
  13 <hr>
  14 <h1>SDL_SemWait</h1>
  15 \83Z\83}\83t\83H\82Ì\92l\82ª\90³\82É\82È\82é\82Ü\82Å\91Ò\8b@\82µ, \83Z\83}\83t\83H\82Ì\92l\82ð\8c¸\8eZ\82·\82é
  16 <h2>\8d\\95¶</h2>
  17 <code>int SDL_SemWait(SDL_sem* sem)</code>
  18 <h2>\88ø\90\94</h2>
  19 <table border="1" summary="SDL_SemWait">
  20 <tr><td>sem</td><td>\83Z\83}\83t\83H</td></tr>
  21 </table>
  22 <h2>\96ß\82è\92l</h2>
  23 \90¬\8c÷\82Ì\82Æ\82«0, \8e¸\94s\82Ì\82Æ\82«\95\89\82Ì\90\94\82Ì\83G\83\89\81[\83R\81[\83h\82ð\96ß\82·.
  24 <a href="SDL_GetError.html">SDL_GetError()</a>\82Å\8fÚ\8d×\82ð\92m\82é\82±\82Æ\82ª\82Å\82«\82é.
  25 <h2>\83T\83\93\83v\83\8b\83R\81[\83h</h2>
  26 <p>
  27 <code>
  28 <pre>
  29 SDL_atomic_t done;
  30 SDL_sem *sem;
  31
  32 SDL_AtomicSet(&amp;done, 0);
  33 sem = SDL_CreateSemaphore(0);
  34 .
  35 .
  36 Thread A:
  37     while (!SDL_AtomicGet(&amp;done)) {
  38         add_data_to_queue();
  39         SDL_SemPost(sem);
  40     }
  41
  42 Thread B:
  43     while (!SDL_AtomicGet(&amp;done)) {
  44         SDL_SemWait(sem);
  45         if (data_available()) {
  46             get_data_from_queue();
  47         }
  48     }
  49 .
  50 .
  51 SDL_AtomicSet(&amp;done, 1);
  52 SDL_SemPost(sem);
  53 wait_for_threads();
  54 SDL_DestroySemaphore(sem);
  55 </pre>
  56 </code>
  57 </p>
  58 <h2>\8fÚ\8d×</h2>
  59 <p>
  60 \83Z\83}\83t\83Hsem\82Ì\92l\82ª\90³\82É\82È\82é, \8a\84\82è\8d\9e\82Ý\82ª\94\90¶\82·\82é, \82Ü\82½\82Í\83G\83\89\81[\82ª\94\90¶\82·\82é\82Ü\82Å\82±\82Ì\8aÖ\90\94\82ð\8cÄ\82ñ\82¾\83X\83\8c\83b\83h\82ð\92â\8e~\82·\82é.
  61 \8cÄ\82Ñ\8fo\82µ\82ª\90¬\8c÷\82·\82ê\82Î, \83Z\83}\83t\83H\82Ì\92l\82ð\83A\83g\83~\83b\83N\82É\8c¸\8eZ\82·\82é.
  62 </p>
  63 <p>
  64 \82±\82Ì\8aÖ\90\94\82Í, <a href="SDL_SemWaitTimeout.html">SDL_SemWaitTimeout()</a>\82Ì\91Ò\82¿\8e\9e\8aÔ\82ðSDL_MUTEX_MAXWAIT\82Æ\82µ\82½\82Ì\82Æ\93¯\82¶\82Å\82 \82é.
  65 </p>
  66 <h2>\8aÖ\98A\8d\80\96Ú(\8aÖ\90\94)</h2>
  67 <a href="SDL_CreateSemaphore.html">SDL_CreateSemaphore</a><br>
  68 <a href="SDL_DestroySemaphore.html">SDL_DestroySemaphore</a><br>
  69 <a href="SDL_SemPost.html">SDL_SemPost</a><br>
  70 <a href="SDL_SemTryWait.html">SDL_SemTryWait</a><br>
  71 <a href="SDL_SemValue.html">SDL_SemValue</a><br>
  72 <a href="SDL_SemWaitTimeout.html">SDL_SemWaitTimeout</a><br>
  73 <h2>SDL Wiki\82Ö\82Ì\83\8a\83\93\83N</h2>
  74 <a href="https://wiki.libsdl.org/SDL_SemWait">SDL_SemWait - SDL Wiki</a>
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