mirror of
https://github.com/jart/cosmopolitan.git
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3f49889841
- Fix preadv() and pwritev() for old distros - Introduce _npassert() and _unassert() macros - Prove that file locks work properly on Windows - Support fcntl(F_DUPFD_CLOEXEC) on more systems
50 lines
3.1 KiB
C
50 lines
3.1 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 2022 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/syscall_support-nt.internal.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/describentoverlapped.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/nt/files.h"
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__msabi extern typeof(LockFileEx) *const __imp_LockFileEx;
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/**
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* Locks file on the New Technology.
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*
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* @return handle, or -1 on failure
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* @note this wrapper takes care of ABI, STRACE(), and __winerr()
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*/
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bool32 LockFileEx(int64_t hFile, uint32_t dwFlags, uint32_t dwReserved,
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uint32_t nNumberOfBytesToLockLow,
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uint32_t nNumberOfBytesToLockHigh,
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struct NtOverlapped *lpOverlapped) {
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bool32 ok;
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STRACE("LockFileEx(%ld, %s, %#x, %'zu, %s) → ...", hFile,
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DescribeNtLockFileFlags(dwFlags), dwReserved,
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(uint64_t)nNumberOfBytesToLockHigh << 32 | nNumberOfBytesToLockLow,
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DescribeNtOverlapped(lpOverlapped));
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ok = __imp_LockFileEx(hFile, dwFlags, dwReserved, nNumberOfBytesToLockLow,
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nNumberOfBytesToLockHigh, lpOverlapped);
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if (!ok) __winerr();
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STRACE("LockFileEx(%ld, %s, %#x, %'zu, [%s]) → %hhhd% m", hFile,
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DescribeNtLockFileFlags(dwFlags), dwReserved,
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(uint64_t)nNumberOfBytesToLockHigh << 32 | nNumberOfBytesToLockLow,
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DescribeNtOverlapped(lpOverlapped), ok);
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return ok;
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}
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