49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2012, 2013.
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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/interlock.h
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Functions that perform non-atomic operations in an atomic manner.
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*******************************************************************************/
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#ifndef SORTIX_INTERLOCK_H
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#define SORTIX_INTERLOCK_H
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namespace Sortix {
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typedef unsigned long (*ilockfunc)(unsigned long, unsigned long);
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typedef struct
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{
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unsigned long o; // old value
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unsigned long n; // new value
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} ilret_t;
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// These atomically modifies a value and return the previous value.
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ilret_t InterlockedModify(unsigned long* ptr,
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ilockfunc f,
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unsigned long user = 0);
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ilret_t InterlockedIncrement(unsigned long* ptr);
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ilret_t InterlockedDecrement(unsigned long* ptr);
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ilret_t InterlockedAdd(unsigned long* ptr, unsigned long arg);
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ilret_t InterlockedSub(unsigned long* ptr, unsigned long arg);
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} // namespace Sortix
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#endif
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