103 lines
2.6 KiB
C++
103 lines
2.6 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2012.
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This file is part of Sortix.
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Sortix is free software: you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation, either version 3 of the License, or (at your option) any later
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version.
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Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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details.
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You should have received a copy of the GNU General Public License along with
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Sortix. If not, see <http://www.gnu.org/licenses/>.
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sortix/kernel/kthread.h
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Utility and synchronization mechanisms for kernel threads.
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*******************************************************************************/
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#ifndef SORTIX_KTHREAD_H
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#define SORTIX_KTHREAD_H
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#include <sortix/signal.h>
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namespace Sortix {
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extern "C" {
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inline static void kthread_yield(void) { asm volatile ("int $129"); }
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void kthread_exit(void* param = NULL) SORTIX_NORETURN;
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typedef unsigned kthread_mutex_t;
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const kthread_mutex_t KTHREAD_MUTEX_INITIALIZER = 0;
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unsigned kthread_mutex_trylock(kthread_mutex_t* mutex);
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void kthread_mutex_lock(kthread_mutex_t* mutex);
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unsigned long kthread_mutex_lock_signal(kthread_mutex_t* mutex);
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void kthread_mutex_unlock(kthread_mutex_t* mutex);
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struct kthread_cond_elem;
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typedef struct kthread_cond_elem kthread_cond_elem_t;
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struct kthread_cond
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{
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kthread_cond_elem_t* first;
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kthread_cond_elem_t* last;
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};
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typedef struct kthread_cond kthread_cond_t;
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const kthread_cond_t KTHREAD_COND_INITIALIZER = { NULL, NULL };
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void kthread_cond_wait(kthread_cond_t* cond, kthread_mutex_t* mutex);
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unsigned long kthread_cond_wait_signal(kthread_cond_t* cond, kthread_mutex_t* mutex);
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void kthread_cond_signal(kthread_cond_t* cond);
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void kthread_cond_broadcast(kthread_cond_t* cond);
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} // extern "C"
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class ScopedLock
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{
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public:
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ScopedLock(kthread_mutex_t* mutex)
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{
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this->mutex = mutex;
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kthread_mutex_lock(mutex);
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}
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~ScopedLock()
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{
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kthread_mutex_unlock(mutex);
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}
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private:
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kthread_mutex_t* mutex;
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};
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class ScopedLockSignal
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{
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public:
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ScopedLockSignal(kthread_mutex_t* mutex)
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{
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this->mutex = mutex;
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this->acquired = kthread_mutex_lock_signal(mutex);
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}
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~ScopedLockSignal()
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{
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if ( acquired )
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kthread_mutex_unlock(mutex);
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}
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bool IsAcquired() { return acquired; }
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private:
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kthread_mutex_t* mutex;
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bool acquired;
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};
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} // namespace Sortix
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#endif
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