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author | Jean-Michel Trivi <jmtrivi@google.com> | 2015-07-15 15:37:57 -0700 |
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committer | Jean-Michel Trivi <jmtrivi@google.com> | 2015-07-15 17:09:51 -0700 |
commit | a9be2d378b7ad84e679a48efa81f42fb54f85d9a (patch) | |
tree | 587d34728dac3517a213d6d2a9a6ebdecd4e7531 /utility/FullIo.cpp | |
parent | c99720d29f2ee618cc74c9336d2cd2a26544c020 (diff) | |
download | external_parameter-framework-a9be2d378b7ad84e679a48efa81f42fb54f85d9a.zip external_parameter-framework-a9be2d378b7ad84e679a48efa81f42fb54f85d9a.tar.gz external_parameter-framework-a9be2d378b7ad84e679a48efa81f42fb54f85d9a.tar.bz2 |
Drop release v2.6.0+no-stlport
Bug 246391
Change-Id: I662b7b0f90c97cb169978e1b64ad1fe32c440cf5
Signed-off-by: Jean-Michel Trivi <jmtrivi@google.com>
Diffstat (limited to 'utility/FullIo.cpp')
-rw-r--r-- | utility/FullIo.cpp | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/utility/FullIo.cpp b/utility/FullIo.cpp new file mode 100644 index 0000000..59765b5 --- /dev/null +++ b/utility/FullIo.cpp @@ -0,0 +1,80 @@ +/* + * Copyright (c) 2015, Intel Corporation + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation and/or + * other materials provided with the distribution. + * + * 3. Neither the name of the copyright holder nor the names of its contributors + * may be used to endorse or promote products derived from this software without + * specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#include "FullIo.hpp" + +#include <cerrno> +#include <unistd.h> + +namespace utility +{ + +/** Workaround c++ `void *` arithmetic interdiction. */ +template <class Ptr> +Ptr *add(Ptr *ptr, size_t count) { + return (char *)ptr + count; +} + +template <class Buff> +static bool fullAccess(ssize_t (&accessor)(int, Buff, size_t), + bool (&accessFailed)(ssize_t), + int fd, Buff buf, size_t count) { + size_t done = 0; // Bytes already access in previous iterations + while (done < count) { + ssize_t accessed = accessor(fd, add(buf, done), count - done); + if (accessFailed(accessed)) { + return false; + } + done += accessed; + } + return true; +} + +static bool accessFailed(ssize_t accessRes) { + return accessRes == -1 and errno != EAGAIN and errno != EINTR; +} + +bool fullWrite(int fd, const void *buf, size_t count) { + return fullAccess(::write, accessFailed, fd, buf, count); +} + +static bool readFailed(ssize_t readRes) { + if (readRes == 0) { // read should not return 0 (EOF) + errno = 0; + return true; + } + return accessFailed(readRes); +} +bool fullRead(int fd, void *buf, size_t count) { + return fullAccess(::read, readFailed, fd, buf, count); +} + +} // namespace utility + |