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Generation and delivery of signals in a two-level, multithreaded system

  • US 5,991,790 A
  • Filed: 07/01/1996
  • Issued: 11/23/1999
  • Est. Priority Date: 07/01/1996
  • Status: Expired due to Term
First Claim
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1. A computer-implemented method for delivering an asynchronous signal comprising:

  • configuring a first process to accept any one of a plurality of asynchronous signals, wherein said first process is visible in a kernel space and in a first user space;

    calling a second process, said second process returning to said first process a value identifying said asynchronous signal; and

    determining whether at least one of a plurality of processes will accept said asynchronous signal, wherein said plurality of processes are visible in at least one user space and are not visible in said kernel space, andif at least one of said plurality of processes will accept said asynchronous signal,selecting a selected process from said at least one of said plurality of processes,redirecting said asynchronous signal to said selected process anddelivering said asynchronous signal to said selected process,else storing said asynchronous signal.

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