mirror of
https://github.com/jart/cosmopolitan.git
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933411ba99
- Fix bugs in kDos2Errno definition - malloc() should now be thread safe - Fix bug in rollup.com header generator - Fix open(O_APPEND) on the New Technology - Fix select() on the New Technology and test it - Work towards refactoring i/o for thread safety - Socket reads and writes on NT now poll for signals - Work towards i/o completion ports on the New Technology - Make read() and write() intermittently check for signals - Blinkenlights keyboard i/o so much better on NT w/ poll() - You can now poll() files and sockets at the same time on NT - Fix bug in appendr() that manifests with dlmalloc footers off
68 lines
3.2 KiB
C
68 lines
3.2 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/nt/createfile.h"
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#include "libc/nt/enum/fileflagandattributes.h"
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#include "libc/nt/enum/filesharemode.h"
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#include "libc/nt/enum/status.h"
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#include "libc/nt/files.h"
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#include "libc/nt/nt/file.h"
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#include "libc/nt/runtime.h"
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#include "libc/nt/struct/fileaccessinformation.h"
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#include "libc/nt/struct/filebasicinformation.h"
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#include "libc/nt/struct/iostatusblock.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/madv.h"
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#include "libc/sysv/consts/o.h"
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#include "libc/sysv/errfuns.h"
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textwindows int sys_fadvise_nt(int fd, uint64_t offset, uint64_t len,
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int advice) {
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int64_t h1, h2;
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int flags, mode;
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uint32_t perm, share, attr;
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if (!__isfdkind(fd, kFdFile)) return ebadf();
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h1 = g_fds.p[fd].handle;
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mode = g_fds.p[fd].mode;
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flags = g_fds.p[fd].flags;
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flags &= ~(O_SEQUENTIAL | O_RANDOM);
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switch (advice) {
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case MADV_NORMAL:
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break;
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case MADV_RANDOM:
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flags |= O_RANDOM;
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break;
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case MADV_SEQUENTIAL:
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flags |= O_SEQUENTIAL;
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break;
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default:
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return einval();
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}
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if (GetNtOpenFlags(flags, mode, &perm, &share, 0, &attr) == -1) return -1;
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if ((h2 = ReOpenFile(h1, perm, share, attr)) != -1) {
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if (h2 != h1) {
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CloseHandle(h1);
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g_fds.p[fd].handle = h2;
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}
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g_fds.p[fd].flags = flags;
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return 0;
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} else {
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return __winerr();
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}
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}
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