Threads & Fork

• Single process with multiple threads (5005threads?)
• Multiple "applications" in a single process (ithreads?)
• Mac OS only allows one instance of a given "physical" application to run at a time
• LWP/HWT (light-weight process, heavy-weight thread): threads with their own fd table and sfio environment
• "Win32" fork() emulation
• Details very sketchy right now
• Another possibility: MacPerl shared library could be accessed by multiple smaller processes, so multiple simultaneous perl programs could run

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