mirror of
https://github.com/jart/cosmopolitan.git
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66 lines
3.6 KiB
C
66 lines
3.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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/sig.internal.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/intrin/describeflags.h"
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#include "libc/intrin/strace.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/ipc.h"
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#include "libc/nt/runtime.h"
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#include "libc/nt/struct/securityattributes.h"
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#include "libc/nt/synchronization.h"
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#include "libc/nt/thunk/msabi.h"
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__msabi extern typeof(CreateNamedPipe) *const __imp_CreateNamedPipeW;
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__msabi extern typeof(GetLastError) *const __imp_GetLastError;
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__msabi extern typeof(Sleep) *const __imp_Sleep;
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/**
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* Creates pipe.
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*
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* @return handle to server end
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* @note this wrapper takes care of ABI, STRACE(), and __winerr()
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*/
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textwindows int64_t CreateNamedPipe(
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const char16_t *lpName, uint32_t dwOpenMode, uint32_t dwPipeMode,
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uint32_t nMaxInstances, uint32_t nOutBufferSize, uint32_t nInBufferSize,
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uint32_t nDefaultTimeOutMs,
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const struct NtSecurityAttributes *opt_lpSecurityAttributes) {
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int64_t hServer;
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uint32_t micros = 1;
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TryAgain:
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hServer = __imp_CreateNamedPipeW(lpName, dwOpenMode, dwPipeMode,
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nMaxInstances, nOutBufferSize, nInBufferSize,
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nDefaultTimeOutMs, opt_lpSecurityAttributes);
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if (hServer == -1 && __imp_GetLastError() == kNtErrorPipeBusy) {
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if (micros >= 1024)
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__imp_Sleep(micros / 1024);
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if (micros < 1024 * 1024)
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micros <<= 1;
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goto TryAgain;
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}
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if (hServer == -1)
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__winerr();
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NTTRACE("CreateNamedPipe(%#hs, %s, %s, %u, %'u, %'u, %'u, %s) → %ld% m",
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lpName, DescribeNtPipeOpenFlags(dwOpenMode),
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DescribeNtPipeModeFlags(dwPipeMode), nMaxInstances, nOutBufferSize,
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nInBufferSize, nDefaultTimeOutMs,
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DescribeNtSecurityAttributes(opt_lpSecurityAttributes), hServer);
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return hServer;
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}
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