mirror of
https://github.com/jart/cosmopolitan.git
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4f98ad1054
- Improve i/o perf on New Technology - Code cleanup on read() for New Technology - Fix bad bug with dup() of socket on New Technology - Clean up some more strace errors on New Technology
53 lines
3 KiB
C
53 lines
3 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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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above 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 │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/internal.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/macros.internal.h"
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#include "libc/nt/files.h"
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#include "libc/nt/memory.h"
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#include "libc/runtime/memtrack.internal.h"
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#include "libc/sysv/consts/map.h"
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#include "libc/sysv/consts/msync.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/consts/prot.h"
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#define ADDR(x) ((char *)((int64_t)((uint64_t)(x) << 32) >> 16))
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noasan textwindows int sys_msync_nt(char *addr, size_t size, int flags) {
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char *a, *b;
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int rc, x, y, l, r, i;
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rc = 0;
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for (i = FindMemoryInterval(&_mmi, (intptr_t)addr >> 16); i < _mmi.i; ++i) {
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if ((ADDR(_mmi.p[i].x) <= addr && addr < ADDR(_mmi.p[i].y + 1)) ||
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(ADDR(_mmi.p[i].x) < addr + size &&
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addr + size <= ADDR(_mmi.p[i].y + 1)) ||
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(addr < ADDR(_mmi.p[i].x) && ADDR(_mmi.p[i].y + 1) < addr + size)) {
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a = MIN(MAX(addr, ADDR(_mmi.p[i].x)), ADDR(_mmi.p[i].y + 1));
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b = MAX(MIN(addr + size, ADDR(_mmi.p[i].y + 1)), ADDR(_mmi.p[i].x));
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if (!FlushViewOfFile(a, b - a)) {
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rc = -1;
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break;
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}
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// TODO(jart): FlushFileBuffers too on g_fds handle if MS_SYNC?
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} else {
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break;
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}
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}
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return rc;
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}
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