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43 lines
1.3 KiB
C++
43 lines
1.3 KiB
C++
// Copyright 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "mojo/edk/platform/platform_handle.h"
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#include <assert.h>
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#include <errno.h>
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#include <unistd.h>
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#include "mojo/edk/platform/scoped_platform_handle.h"
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namespace mojo {
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namespace platform {
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void PlatformHandle::CloseIfNecessary() {
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if (!is_valid())
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return;
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if (close(fd) != 0) {
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// The possible errors are EBADF (which is very bad -- it indicates a bug in
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// our code), EINTR, or EIO. On EINTR, don't retry |close()| (this is the
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// correct behavior on Linux, and the only safe thing to do on Mac: see,
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// e.g., http://crbug.com/269623). EIO is sad (it indicates potential data
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// loss), but again there's nothing more to do.
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assert(errno == EINTR || errno == EIO);
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}
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fd = -1;
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}
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ScopedPlatformHandle PlatformHandle::Duplicate() const {
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// This is slightly redundant, but it's good to be safe (and avoid the system
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// call and resulting EBADF).
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if (!is_valid())
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return ScopedPlatformHandle();
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// Note that |dup()| returns -1 on error (which is exactly the value we use
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// for invalid |PlatformHandle| FDs).
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return ScopedPlatformHandle(PlatformHandle(dup(fd)));
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}
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} // namespace embedder
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} // namespace mojo
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