Emilio Cobos Álvarez
dbc850b10f
Autogenerated with:
cp dom/.clang-format mfbt/ && mach format mfbt/**.{cpp,h,mm}
No manual changes required.
Differential Revision: https://phabricator.services.mozilla.com/D311691
76 lines
1.8 KiB
C++
76 lines
1.8 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "UniquePtrExtensions.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/DebugOnly.h"
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#ifdef XP_WIN
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# include <windows.h>
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#else
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# include <errno.h>
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# include <fcntl.h>
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# include <unistd.h>
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#endif
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namespace mozilla {
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namespace detail {
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void FileHandleDeleter::operator()(FileHandleHelper aHelper) {
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if (aHelper != nullptr) {
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DebugOnly<bool> ok;
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#ifdef XP_WIN
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ok = CloseHandle(aHelper);
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#else
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ok = close(aHelper) == 0 || errno == EINTR;
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#endif
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MOZ_ASSERT(ok, "failed to close file handle");
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}
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}
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} // namespace detail
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#ifdef XP_UNIX
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void SetCloseOnExec(detail::FileHandleType aFile) {
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// The fcntl calls shouldn't fail if aFile is valid.
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if (aFile >= 0) {
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int fdFlags = fcntl(aFile, F_GETFD);
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MOZ_ASSERT(fdFlags >= 0);
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if (fdFlags >= 0) {
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DebugOnly<int> rv = fcntl(aFile, F_SETFD, fdFlags | FD_CLOEXEC);
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MOZ_ASSERT(rv != -1);
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}
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}
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}
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#endif
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#ifndef __wasm__
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UniqueFileHandle DuplicateFileHandle(detail::FileHandleType aFile) {
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if (FileHandleIsValid(aFile)) {
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# ifdef XP_WIN
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HANDLE handle;
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HANDLE currentProcess = ::GetCurrentProcess();
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if (::DuplicateHandle(currentProcess, aFile, currentProcess, &handle, 0,
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false, DUPLICATE_SAME_ACCESS)) {
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return UniqueFileHandle{handle};
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}
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# else
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int fd;
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// Set cloexec atomically if supported; otherwise fall back to non-atomic.
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# ifdef F_DUPFD_CLOEXEC
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fd = fcntl(aFile, F_DUPFD_CLOEXEC, 0);
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# else
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fd = dup(aFile);
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SetCloseOnExec(fd);
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# endif
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return UniqueFileHandle{fd};
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# endif
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}
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return nullptr;
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}
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#endif
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} // namespace mozilla
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