41 lines
2.4 KiB
C
41 lines
2.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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#include "libc/calls/calls.h"
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#include "libc/runtime/buffer.h"
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#include "libc/runtime/mappings.h"
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void bfree(struct GuardedBuffer *b) {
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int mr;
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size_t mi;
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struct AddrSize az;
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struct MemoryCoord mc;
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if (b->p) {
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mc = ADDRSIZE_TO_COORD(b->p, 1);
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mi = findmapping(mc.y);
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assert(mi > 0);
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assert(ISOVERLAPPING(mc, _mm.p[mi - 1]));
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az = COORD_TO_ADDRSIZE(_mm.p[mi - 1]);
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mr = munmap(az.addr, az.size);
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assert(mr != -1);
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b->p = NULL;
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}
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}
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