Changes between Version 107 and Version 108 of processus_thread


Ignore:
Timestamp:
Aug 22, 2018, 6:11:11 PM (3 years ago)
Author:
alain
Comment:

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  • processus_thread

    v107 v108  
    148148This destruction mechanism can involve three threads: the target thread T, the killer thread K, and the joining thread J:
    149149
    150 It uses two specific fields in the thread descriptor: the ''join_lock'' field is a remote_spin_lock, and the ''join_xp'' field contains an extended pointer on the first arrived thread. It uses also two specific [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/kern/thread.h#L72 THREAD_FLAG_JOIN_DONE] and [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/kern/thread.h#L73 THREAD_FLAG_KILL_DONE] flags in the target thread descriptor ''flags'' field, and one specific blocking bit [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/kern/thread.h#L86 THREAD_BLOCKED_JOIN], in the ''blocked'' field.
     150It uses two specific fields in the target thread descriptor: the ''join_lock'' field is a remote_spin_lock, and the ''join_xp'' field contains an extended pointer on the first arrived thread. It uses also two specific [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/kern/thread.h#L72 THREAD_FLAG_JOIN_DONE] and [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/kern/thread.h#L73 THREAD_FLAG_KILL_DONE] flags in the target thread descriptor ''flags'' field, and one specific blocking bit [https://www-soc.lip6.fr/trac/almos-mkh/browser/trunk/kernel/kern/thread.h#L86 THREAD_BLOCKED_JOIN], in the ''blocked'' field.
    151151
    152152 * Both the killer thread K, executing the thread_kill() function), and the joining thread J, executing the sys_thread_join() function, try to take the ''join_lock'' implemented in the T thread descriptor (the ''join_lock'' in the J thread is not used).