| author | Sam Lantinga <slouken@lokigames.com> |
| Sun, 10 Jun 2001 19:31:57 +0000 | |
| changeset 55 | 55f1f1b3e27d |
| parent 0 | 74212992fb08 |
| child 181 | e5bc29de3f0a |
| permissions | -rw-r--r-- |
| 0 | 1 |
<HTML |
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><HEAD |
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><TITLE |
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>Multi-threaded Programming</TITLE |
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NAME="GENERATOR" |
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55
55f1f1b3e27d
Added new docs for SDL 1.2.1
Sam Lantinga <slouken@lokigames.com>
parents:
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diff
changeset
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CONTENT="Modular DocBook HTML Stylesheet Version 1.64 |
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"><LINK |
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REL="HOME" |
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TITLE="SDL Library Documentation" |
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HREF="index.html"><LINK |
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REL="UP" |
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TITLE="SDL Reference" |
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HREF="reference.html"><LINK |
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REL="PREVIOUS" |
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TITLE="SDL_CDtrack" |
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HREF="sdlcdtrack.html"><LINK |
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REL="NEXT" |
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TITLE="SDL_CreateThread" |
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HREF="sdlcreatethread.html"><META |
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NAME="KEYWORD" |
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CONTENT="threads"><META |
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NAME="KEYWORD" |
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CONTENT="function"></HEAD |
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><BODY |
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CLASS="CHAPTER" |
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BGCOLOR="#FFF8DC" |
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TEXT="#000000" |
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LINK="#0000ee" |
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VLINK="#551a8b" |
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ALINK="#ff0000" |
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><DIV |
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CLASS="NAVHEADER" |
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><TABLE |
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WIDTH="100%" |
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BORDER="0" |
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CELLPADDING="0" |
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CELLSPACING="0" |
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><TR |
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><TH |
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COLSPAN="3" |
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ALIGN="center" |
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>SDL Library Documentation</TH |
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></TR |
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><TR |
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><TD |
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WIDTH="10%" |
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ALIGN="left" |
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VALIGN="bottom" |
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><A |
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HREF="sdlcdtrack.html" |
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>Prev</A |
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></TD |
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><TD |
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WIDTH="80%" |
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ALIGN="center" |
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VALIGN="bottom" |
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></TD |
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><TD |
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WIDTH="10%" |
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ALIGN="right" |
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VALIGN="bottom" |
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><A |
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HREF="sdlcreatethread.html" |
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>Next</A |
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></TD |
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></TR |
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></TABLE |
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><HR |
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ALIGN="LEFT" |
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WIDTH="100%"></DIV |
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><DIV |
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CLASS="CHAPTER" |
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><H1 |
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><A |
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NAME="THREAD" |
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>Chapter 12. Multi-threaded Programming</A |
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></H1 |
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><DIV |
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CLASS="TOC" |
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><DL |
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><DT |
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><B |
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>Table of Contents</B |
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></DT |
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><DT |
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><A |
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HREF="sdlcreatethread.html" |
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>SDL_CreateThread</A |
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> — Creates a new thread of execution that shares its parent's properties.</DT |
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><DT |
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><A |
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HREF="sdlthreadid.html" |
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>SDL_ThreadID</A |
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> — Get the 32-bit thread identifier for the current thread.</DT |
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><DT |
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><A |
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HREF="sdlgetthreadid.html" |
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>SDL_GetThreadID</A |
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> — Get the SDL thread ID of a SDL_Thread</DT |
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><DT |
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><A |
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HREF="sdlwaitthread.html" |
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>SDL_WaitThread</A |
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> — Wait for a thread to finish.</DT |
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><DT |
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><A |
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HREF="sdlkillthread.html" |
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>SDL_KillThread</A |
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> — Gracelessly terminates the thread.</DT |
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><DT |
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><A |
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HREF="sdlcreatemutex.html" |
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>SDL_CreateMutex</A |
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> — Create a mutex</DT |
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><DT |
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><A |
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HREF="sdldestroymutex.html" |
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>SDL_DestroyMutex</A |
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> — Destroy a mutex</DT |
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><DT |
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><A |
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HREF="sdlmutexp.html" |
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>SDL_mutexP</A |
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> — Lock a mutex</DT |
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><DT |
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><A |
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HREF="sdlmutexv.html" |
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>SDL_mutexV</A |
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> — Unlock a mutex</DT |
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><DT |
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><A |
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HREF="sdlcreatesemaphore.html" |
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>SDL_CreateSemaphore</A |
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> — Creates a new semaphore and assigns an initial value to it.</DT |
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><DT |
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><A |
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HREF="sdldestroysemaphore.html" |
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>SDL_DestroySemaphore</A |
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> — Destroys a semaphore that was created by <A |
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HREF="sdlcreatesemaphore.html" |
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>SDL_CreateSemaphore</A |
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>.</DT |
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><DT |
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><A |
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HREF="sdlsemwait.html" |
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>SDL_SemWait</A |
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> — Lock a semaphore and suspend the thread if the semaphore value is zero.</DT |
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><DT |
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><A |
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HREF="sdlsemtrywait.html" |
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>SDL_SemTryWait</A |
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> — Attempt to lock a semaphore but don't suspend the thread.</DT |
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><DT |
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><A |
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HREF="sdlsemwaittimeout.html" |
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>SDL_SemWaitTimeout</A |
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> — Lock a semaphore, but only wait up to a specified maximum time.</DT |
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><DT |
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><A |
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HREF="sdlsempost.html" |
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>SDL_SemPost</A |
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> — Unlock a semaphore.</DT |
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><DT |
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><A |
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HREF="sdlsemvalue.html" |
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>SDL_SemValue</A |
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> — Return the current value of a semaphore.</DT |
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><DT |
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><A |
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HREF="sdlcreatecond.html" |
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>SDL_CreateCond</A |
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> — Create a condition variable</DT |
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><DT |
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><A |
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HREF="sdldestroycond.html" |
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>SDL_DestroyCond</A |
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> — Destroy a condition variable</DT |
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><DT |
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><A |
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HREF="sdlcondsignal.html" |
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>SDL_CondSignal</A |
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> — Restart a thread wait on a condition variable</DT |
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><DT |
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><A |
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HREF="sdlcondbroadcast.html" |
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>SDL_CondBroadcast</A |
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> — Restart all threads waiting on a condition variable</DT |
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><DT |
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><A |
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HREF="sdlcondwait.html" |
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>SDL_CondWait</A |
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> — Wait on a condition variable</DT |
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><DT |
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><A |
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HREF="sdlcondwaittimeout.html" |
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>SDL_CondWaitTimeout</A |
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> — Wait on a condition variable, with timeout</DT |
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></DL |
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></DIV |
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><P |
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>SDL provides functions for creating threads, mutexes, semphores and condition variables.</P |
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><P |
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>In general, you must be very aware of concurrency and data integrity issues |
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when writing multi-threaded programs. Some good guidelines include: |
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<P |
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></P |
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><UL |
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><LI |
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><P |
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>Don't call SDL video/event functions from separate threads</P |
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></LI |
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><LI |
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><P |
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>Don't use any library functions in separate threads</P |
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></LI |
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><LI |
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><P |
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>Don't perform any memory management in separate threads</P |
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></LI |
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><LI |
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><P |
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>Lock global variables which may be accessed by multiple threads</P |
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></LI |
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><LI |
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><P |
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>Never terminate threads, always set a flag and wait for them to quit</P |
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></LI |
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><LI |
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><P |
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>Think very carefully about all possible ways your code may interact</P |
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></LI |
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></UL |
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></P |
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><DIV |
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CLASS="NOTE" |
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><BLOCKQUOTE |
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CLASS="NOTE" |
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><P |
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><B |
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>Note: </B |
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>SDL's threading is not implemented on MacOS, due to that lack of preemptive thread support (eck!)</P |
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></BLOCKQUOTE |
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></DIV |
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></DIV |
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><DIV |
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CLASS="NAVFOOTER" |
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><HR |
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ALIGN="LEFT" |
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WIDTH="100%"><TABLE |
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WIDTH="100%" |
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BORDER="0" |
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CELLPADDING="0" |
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CELLSPACING="0" |
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><TR |
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><TD |
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WIDTH="33%" |
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ALIGN="left" |
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VALIGN="top" |
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><A |
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HREF="sdlcdtrack.html" |
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>Prev</A |
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></TD |
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><TD |
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WIDTH="34%" |
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ALIGN="center" |
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VALIGN="top" |
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><A |
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HREF="index.html" |
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>Home</A |
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></TD |
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><TD |
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WIDTH="33%" |
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ALIGN="right" |
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VALIGN="top" |
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><A |
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HREF="sdlcreatethread.html" |
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>Next</A |
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></TD |
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></TR |
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><TR |
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><TD |
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WIDTH="33%" |
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ALIGN="left" |
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VALIGN="top" |
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>SDL_CDtrack</TD |
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><TD |
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WIDTH="34%" |
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ALIGN="center" |
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VALIGN="top" |
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><A |
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HREF="reference.html" |
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>Up</A |
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></TD |
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><TD |
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WIDTH="33%" |
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ALIGN="right" |
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VALIGN="top" |
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>SDL_CreateThread</TD |
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></TR |
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></TABLE |
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></DIV |
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></BODY |
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></HTML |
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> |