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https://github.com/jart/cosmopolitan.git
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d1a745c17c
* Implement __zipos_dup Makes ZiposHandle reference-counted by an `rc` field in a union with its freelist `next` pointer. The functions `__zipos_free` and `__zipos_keep` function as incref/decref for it. Adds `__zipos_postdup` to fix metadata on file descriptors after dup-like operations, and adds zipos support to `sys_dup_nt` + `sys_close_nt`. * Remove noop __zipos_postdup rc is never a zipos file because it is always a previously unused file descriptor. fd is never a zipos file because that case has been handled above by __zipos_fcntl.
67 lines
3.3 KiB
C
67 lines
3.3 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/calls/struct/fd.internal.h"
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#include "libc/calls/syscall-nt.internal.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/intrin/weaken.h"
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#include "libc/nt/enum/filetype.h"
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#include "libc/nt/files.h"
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#include "libc/nt/runtime.h"
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#include "libc/runtime/zipos.internal.h"
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#include "libc/sock/syscall_fd.internal.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_close_nt(int fd, int fildes) {
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if (fd + 0u >= g_fds.n) return ebadf();
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struct Fd *f = g_fds.p + fd;
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switch (f->kind) {
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case kFdZip:
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return _weaken(__zipos_close)(fd);
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case kFdEmpty:
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return ebadf();
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case kFdFile:
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void sys_fcntl_nt_lock_cleanup(int);
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if (_weaken(sys_fcntl_nt_lock_cleanup)) {
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_weaken(sys_fcntl_nt_lock_cleanup)(fildes);
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}
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if ((f->flags & O_ACCMODE) != O_RDONLY &&
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GetFileType(f->handle) == kNtFileTypeDisk) {
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// Like Linux, closing a file on Windows doesn't guarantee it is
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// immediately synced to disk. But unlike Linux this could cause
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// subsequent operations, e.g. unlink() to break w/ access error
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FlushFileBuffers(f->handle);
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}
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break;
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case kFdEpoll:
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if (_weaken(sys_close_epoll_nt)) {
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return _weaken(sys_close_epoll_nt)(fd);
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}
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break;
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case kFdSocket:
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if (_weaken(sys_closesocket_nt)) {
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return _weaken(sys_closesocket_nt)(g_fds.p + fd);
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}
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break;
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default:
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break;
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}
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return CloseHandle(f->handle) ? 0 : __winerr();
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}
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