/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-â
âvi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :viâ
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ¡
â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ*/
#include "libc/calls/internal.h"
#include "libc/calls/state.internal.h"
#include "libc/calls/syscall_support-nt.internal.h"
#include "libc/nt/createfile.h"
#include "libc/nt/enum/accessmask.h"
#include "libc/nt/enum/creationdisposition.h"
#include "libc/nt/enum/fileflagandattributes.h"
#include "libc/nt/ipc.h"
#include "libc/nt/runtime.h"
#include "libc/sysv/consts/limits.h"
#include "libc/sysv/consts/o.h"
#include "libc/sysv/errfuns.h"

textwindows int sys_pipe_nt(int pipefd[2], unsigned flags) {
  uint32_t mode;
  int64_t hin, hout;
  int reader, writer;
  char16_t pipename[64];
  CreatePipeName(pipename);
  __fds_lock();
  if ((reader = __reservefd_unlocked(-1)) == -1) {
    __fds_unlock();
    return -1;
  }
  if ((writer = __reservefd_unlocked(-1)) == -1) {
    __releasefd(reader);
    __fds_unlock();
    return -1;
  }
  if (~flags & O_DIRECT) {
    mode = kNtPipeTypeByte | kNtPipeReadmodeByte;
  } else {
    mode = kNtPipeTypeMessage | kNtPipeReadmodeMessage;
  }
  __fds_unlock();
  hin = CreateNamedPipe(pipename, kNtPipeAccessInbound | kNtFileFlagOverlapped,
                        mode, 1, PIPE_BUF, PIPE_BUF, 0, &kNtIsInheritable);
  __fds_lock();
  if (hin != -1) {
    if ((hout = CreateFile(pipename, kNtGenericWrite, 0, &kNtIsInheritable,
                           kNtOpenExisting, kNtFileFlagOverlapped, 0)) != -1) {
      g_fds.p[reader].kind = kFdFile;
      g_fds.p[reader].flags = flags;
      g_fds.p[reader].mode = 0010444;
      g_fds.p[reader].handle = hin;
      g_fds.p[writer].kind = kFdFile;
      g_fds.p[writer].flags = flags;
      g_fds.p[writer].mode = 0010222;
      g_fds.p[writer].handle = hout;
      pipefd[0] = reader;
      pipefd[1] = writer;
      __fds_unlock();
      return 0;
    } else {
      CloseHandle(hin);
    }
  }
  __releasefd(writer);
  __releasefd(reader);
  __fds_unlock();
  return -1;
}
