122 lines
3.6 KiB
C++
122 lines
3.6 KiB
C++
/*
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* Copyright (c) 2011-2016, 2018, 2021-2022 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/kernel/thread.h
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* Describes a thread belonging to a process.
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*/
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#ifndef _INCLUDE_SORTIX_KERNEL_THREAD_H
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#define _INCLUDE_SORTIX_KERNEL_THREAD_H
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#include <stdint.h>
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#include <sortix/sigaction.h>
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#include <sortix/signal.h>
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#include <sortix/sigset.h>
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#include <sortix/stack.h>
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#include <sortix/kernel/clock.h>
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#include <sortix/kernel/kthread.h>
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#include <sortix/kernel/registers.h>
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#include <sortix/kernel/scheduler.h>
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#include <sortix/kernel/signal.h>
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namespace Sortix {
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class Process;
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class Thread;
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// These functions create a new kernel process but doesn't start it.
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Thread* CreateKernelThread(Process* process, struct thread_registers* regs,
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const char* name);
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Thread* CreateKernelThread(Process* process, void (*entry)(void*), void* user,
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const char* name, size_t stacksize = 0);
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Thread* CreateKernelThread(void (*entry)(void*), void* user, const char* name,
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size_t stacksize = 0);
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// This function can be used to start a thread from the above functions.
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void StartKernelThread(Thread* thread);
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// Alternatively, these functions both create and start the thread.
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Thread* RunKernelThread(Process* process, struct thread_registers* regs,
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const char* name);
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Thread* RunKernelThread(Process* process, void (*entry)(void*), void* user,
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const char* name, size_t stacksize = 0);
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Thread* RunKernelThread(void (*entry)(void*), void* user, const char* name,
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size_t stacksize = 0);
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enum yield_operation
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{
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YIELD_OPERATION_NONE,
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YIELD_OPERATION_WAIT_FUTEX,
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YIELD_OPERATION_WAIT_FUTEX_SIGNAL,
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};
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class Thread
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{
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public:
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Thread();
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~Thread();
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public:
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const char* name;
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uintptr_t system_tid;
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uintptr_t yield_to_tid;
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struct thread_registers registers;
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size_t id;
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Process* process;
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Thread* prevsibling;
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Thread* nextsibling;
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Thread* scheduler_list_prev;
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Thread* scheduler_list_next;
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volatile ThreadState state;
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sigset_t signal_pending;
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sigset_t signal_mask;
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sigset_t saved_signal_mask;
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stack_t signal_stack;
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addr_t kernelstackpos;
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size_t kernelstacksize;
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size_t signal_count;
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uintptr_t signal_single_frame;
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uintptr_t signal_canary;
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bool kernelstackmalloced;
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bool pledged_destruction;
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bool force_no_signals;
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bool signal_single;
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bool has_saved_signal_mask;
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Clock execute_clock;
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Clock system_clock;
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uintptr_t futex_address;
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bool futex_woken;
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bool timer_woken;
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Thread* futex_prev_waiting;
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Thread* futex_next_waiting;
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enum yield_operation yield_operation;
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public:
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void HandleSignal(struct interrupt_context* intctx);
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void HandleSigreturn(struct interrupt_context* intctx);
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bool DeliverSignal(int signum);
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bool DeliverSignalUnlocked(int signum);
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void DoUpdatePendingSignal();
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};
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Thread* CurrentThread();
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} // namespace Sortix
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#endif
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