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5e7605fad2
The idle thread is now actually run when the system is idle because it truly goes idle. The idle thread is made power efficient by using the hlt instruction rather than a busy loop. The new futex(2) system call is used to implement fast user-space mutexes, condition variables, and semaphores. The same backend and design is used as kutexes for truly sleeping kernel mutexes and condition variables. The new exit_thread(2) flag EXIT_THREAD_FUTEX_WAKE wakes a futex. Sleeping on clocks in the kernel now uses timers for true sleep. The interrupt worker thread now truly sleeps when idle. Kernel threads are now named. This is a compatible ABI change.
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
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* Copyright (c) 2013, 2014, 2021 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* sortix/exit.h
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* Flags and constants related to process and thread exiting.
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*/
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#ifndef INCLUDE_SORTIX_EXIT_H
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#define INCLUDE_SORTIX_EXIT_H
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#include <sys/cdefs.h>
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#include <sys/__/types.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef __size_t_defined
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#define __size_t_defined
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#define __need_size_t
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#include <stddef.h>
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#endif
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struct exit_thread
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{
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void* unmap_from;
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size_t unmap_size;
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void* zero_from;
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size_t zero_size;
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void* tls_unmap_from;
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size_t tls_unmap_size;
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unsigned long reserved[2];
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};
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#define EXIT_THREAD_ONLY_IF_OTHERS (1<<0)
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#define EXIT_THREAD_UNMAP (1<<1)
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#define EXIT_THREAD_ZERO (1<<2)
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#define EXIT_THREAD_TLS_UNMAP (1<<3)
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#define EXIT_THREAD_PROCESS (1<<4)
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#define EXIT_THREAD_DUMP_CORE (1<<5)
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#define EXIT_THREAD_FUTEX_WAKE (1<<6)
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif
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