54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/* Calculate the size of physical memory.
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Copyright (C) 2000, 2003, 2009-2025 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Paul Eggert. */
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#ifndef PHYSMEM_H_
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# define PHYSMEM_H_ 1
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Returns the total amount of physical memory.
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This value is more or less a hard limit for the working set. */
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double physmem_total (void);
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/* Returns the amount of physical memory available.
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This value is the amount of memory the application can use without hindering
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any other process (assuming that no other process increases its memory
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usage). */
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double physmem_available (void);
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/* Returns the amount of physical memory that can be claimed, with a given
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aggressivity.
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For AGGRESSIVITY == 0.0, the result is like physmem_available (): the amount
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of memory the application can use without hindering any other process.
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For AGGRESSIVITY == 1.0, the result is the amount of memory the application
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can use, while causing memory shortage to other processes, but without
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bringing the machine into an out-of-memory state.
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Values in between, for example AGGRESSIVITY == 0.5, are a reasonable middle
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ground. */
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double physmem_claimable (double aggressivity);
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#ifdef __cplusplus
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}
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#endif
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#endif /* PHYSMEM_H_ */
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