Article View: comp.sys.amiga.tech
Article #13886Re: GetMsg, PutMsg - Question
From: Andy Heffernan
Date: Sat, 24 Feb 1990 00:31
Date: Sat, 24 Feb 1990 00:31
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In article <3197@ssc-vax.UUCP> dano@ssc-vax.UUCP (Dan Olson) writes: >Just curious, do GetMsg and PutMsg automatically Forbid so that two >tasks cannot accidently muck each other up if there just happens to >be task switching while both tasks are hacking at the same port. Actually, they DISABLE on entry and ENABLE on exit since they fool with the list of messages attached to a given MsgPort, and an interrupt routine could sneak in and attach a message to that MsgPort if the routine was merely forbidden. -- ------------------------------------------------------------------------- Andy Heffernan uunet!glyph!ahh "'Iodine!' shrieked Clavius the Mage. 'I must have iodine!'"
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!brutus.cs.uiuc.edu!jarthur!uunet!glyph!ahhReferences:
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!brutus.cs.uiuc.edu!jarthur!uunet!glyph!ahh From: ahh@glyph.UUCP (Andy Heffernan) Newsgroups: comp.sys.amiga.tech Subject: Re: GetMsg, PutMsg - Question Summary: woof Message-ID: <503@glyph.UUCP> Date: 24 Feb 90 00:31:37 GMT References: <3197@ssc-vax.UUCP> Reply-To: ahh@glyph.UUCP (Andy Heffernan) Organization: Cinnamon Toast Crunch Research Labs Lines: 14