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| author | Thomas Schwinge <thomas@codesourcery.com> | 2012-05-24 23:08:09 +0200 |
|---|---|---|
| committer | Thomas Schwinge <thomas@codesourcery.com> | 2012-05-24 23:08:09 +0200 |
| commit | 2910b7c5b1d55bc304344b584a25ea571a9075fb (patch) | |
| tree | bfbfbc98d4c0e205d2726fa44170a16e8421855e /microkernel/mach/thread.mdwn | |
| parent | 35b719f54c96778f571984065579625bc9f15bf5 (diff) | |
Prepare toolchain/logs/master branch.
Diffstat (limited to 'microkernel/mach/thread.mdwn')
| -rw-r--r-- | microkernel/mach/thread.mdwn | 37 |
1 files changed, 0 insertions, 37 deletions
diff --git a/microkernel/mach/thread.mdwn b/microkernel/mach/thread.mdwn deleted file mode 100644 index e27bb117..00000000 --- a/microkernel/mach/thread.mdwn +++ /dev/null @@ -1,37 +0,0 @@ -[[!meta copyright="Copyright © 2002, 2003, 2010 Free Software Foundation, -Inc."]] - -[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable -id="license" text="Permission is granted to copy, distribute and/or modify this -document under the terms of the GNU Free Documentation License, Version 1.2 or -any later version published by the Free Software Foundation; with no Invariant -Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license -is included in the section entitled [[GNU Free Documentation -License|/fdl]]."]]"""]] - -A Mach *thread* belongs to exactly one [[task]], and is the means of execution. -The task supplies the resources. - -Mach threads are implemented inside the [[kernel]], as opposed to other -systems' user-level thread packages. - -A thread (theoretically) runs concurrently with all the other threads of a -system. If the system provides several processors, they can be used for -simultaneously running either several threads of the same task, or several -threads of different tasks. <!-- This is called SMP; the processors use -*shared memory*. --> [[!tag open_issue_documentation]] <!-- This needs a new -page, also covering Mach's `processor_set`s, and non-SMP, but still -multiprocessor systems. --> (But this is currently not support in [[GNU -Mach|gnumach]].) - -It is easy for the kernel to switch execution from one thread to another one -inside the same task: essentially, it only involves exchanging a few processor -registers' state. - -Threads have scheduling parameters and maintain various statistics about -themselves. - -On GNU/Hurd, APIs for Mach threads and thereabouts are provided by the -[[hurd/libthreads]] (cthreads), and [[libpthread]] (POSIX Threads) packages. - -A task backing a thread is the basis for a [[UNIX process|unix/process]]. |