2 * Copyright (c) 2008 The Hewlett-Packard Development Company
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
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8 * notice, this list of conditions and the following disclaimer;
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10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
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14 * this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 * Authors: Nathan Binkert
34 #include "base/atomicio.hh"
37 atomic_read(int fd
, void *s
, size_t n
)
39 char *p
= reinterpret_cast<char *>(s
);
42 // Keep reading until we've gotten all of the data.
44 ssize_t result
= read(fd
, p
+ pos
, n
- pos
);
46 // We didn't get any more data, so we should probably punt,
47 // otherwise we'd just keep spinning
51 // If there was an error, try again on EINTR/EAGAIN, pass the
52 // error up otherwise.
54 if (errno
== EINTR
|| errno
== EAGAIN
)
66 atomic_write(int fd
, const void *s
, size_t n
)
68 const char *p
= reinterpret_cast<const char *>(s
);
71 // Keep writing until we've written all of the data
73 ssize_t result
= write(fd
, p
+ pos
, n
- pos
);
75 // We didn't manage to write anything this time, so we should
76 // probably punt, otherwise we'd just keep spinning
80 // If there was an error, try again on EINTR/EAGAIN, pass the
81 // error up otherwise.
83 if (errno
== EINTR
|| errno
== EAGAIN
)