📄 os-io.mldoc
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<!-- os-io.mldoc --><!DOCTYPE ML-DOC SYSTEM><AUTHOR NAME="John Reppy" EMAIL="jhr@research.att.com" YEAR=1996><COPYRIGHT OWNER="Bell Labs, Lucent Technologies" YEAR=1998><COPYRIGHT OWNER="AT&T Research" YEAR=1996><VERSION VERID="1.4" YEAR=1996 MONTH=4 DAY=30><TITLE>The OS.IO structure</TITLE><INTERFACE><HEAD>The <CD/OS.IO/ structure</HEAD><SEEALSO> <STRREF TOPID/OS/ <STRREF DOCUMENT=SML-BASIS-DOC STRID="OS"/OS.IO/</SEEALSO><PP> The <STRREF NOLINK/OS.IO/ structure provides a general interfacefor polling I/O devices, which has been modelled after the Unix SVR4poll interface. A <TYREF DOCUMENT=SML-BASIS-DOC STRID="OS.IO"/poll_desc/, created from an I/O descriptor, can beused to test for various polling conditions.<STRUCTURE STRID="OS.IO" STATUS=REQUIRED> <SIGBODY SIGID="CML_OS_IO" FILE=OS-IO-SIG> <SPEC> <INCLUDE><SIGREF DOCUMENT=SML-BASIS-DOC/OS_IO/ <SPEC> <VAL>pollEvt<TY>poll_desc list -> poll_info list event <RAISES><EXNREF DOCUMENT=SML-BASIS-DOC STRID="OS"/OS.SysErr/ <COMMENT> <PROTOTY> pollEvt <ARG/l/ </PROTOTY> polls a list of poll descriptors <ARG/l/. This will raise <EXNREF DOCUMENT=SML-BASIS-DOC STRID="OS"/OS.SysErr/ if, for example, one of the file descriptors refers to a closed file.</STRUCTURE></INTERFACE>⌨️ 快捷键说明
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