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locks; strict;
comment	@// @;


1.1
date	2013.02.23.12.34.07;	author jmmv;	state Exp;
branches
	1.1.1.1;
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1.1.1.1.4.1
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1.1.1.1.4.2
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1.1.1.1.12.1
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1.1.1.1.12.2
date	2014.05.22.15.45.30;	author yamt;	state Exp;
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commitid	h3iiOYJJCkPr7yBx;


desc
@@


1.1
log
@Initial revision
@
text
@// Copyright 2010 Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Google Inc. 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
// OWNER 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 "utils/signals/programmer.hpp"

extern "C" {
#include <signal.h>
}

#include <cerrno>

#include "utils/format/macros.hpp"
#include "utils/logging/macros.hpp"
#include "utils/sanity.hpp"
#include "utils/signals/exceptions.hpp"


namespace utils {
namespace signals {


/// Internal implementation for the signals::programmer class.
struct programmer::impl {
    /// The number of the signal managed by this programmer.
    int signo;

    /// Whether the signal is currently programmed by us or not.
    bool programmed;

    /// The signal handler that we replaced; to be restored on unprogramming.
    struct ::sigaction old_sa;

    /// Initializes the internal implementation of the programmer.
    ///
    /// \param signo_ The signal number.
    impl(const int signo_) :
        signo(signo_),
        programmed(false)
    {
    }
};


} // namespace signals
} // namespace utils


namespace signals = utils::signals;


/// Programs a signal handler.
///
/// \param signo The signal for which to install the handler.
/// \param handler The handler to install.
///
/// \throw signals::system_error If there is an error programming the signal.
signals::programmer::programmer(const int signo, const handler_type handler) :
    _pimpl(new impl(signo))
{
    struct ::sigaction sa;
    sa.sa_handler = handler;
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = SA_RESTART;

    if (::sigaction(_pimpl->signo, &sa, &_pimpl->old_sa) == -1) {
        const int original_errno = errno;
        throw system_error(F("Could not install handler for signal %s") %
                           _pimpl->signo, original_errno);
    } else
        _pimpl->programmed = true;
}


/// Destructor; unprograms the signal handler if still programmed.
///
/// Given that this is a destructor and it can't report errors back to the
/// caller, the caller must attempt to call unprogram() on its own.
signals::programmer::~programmer(void)
{
    if (_pimpl->programmed) {
        LW("Destroying still-programmed signals::programmer object");
        try {
            unprogram();
        } catch (const system_error& e) {
            UNREACHABLE;
        }
    }
}


/// Unprograms the signal handler.
///
/// \pre The signal handler is programmed (i.e. this can only be called once).
///
/// \throw system_error If unprogramming the signal failed.  If this happens,
///     the signal is left programmed, this object forgets about the signal and
///     therefore there is no way to restore the original handler.
void
signals::programmer::unprogram(void)
{
    PRE(_pimpl->programmed);

    // If we fail, we don't want the destructor to attempt to unprogram the
    // handler again, as it would result in a crash.
    _pimpl->programmed = false;

    if (::sigaction(_pimpl->signo, &_pimpl->old_sa, NULL) == -1) {
        const int original_errno = errno;
        throw system_error(F("Could not reset handler for signal %s") %
                           _pimpl->signo, original_errno);
    }
}
@


1.1.1.1
log
@Initial import of Kyua CLI, version 0.6:

This is the main component of Kyua and its build will be guarded by the
MKKYUA knob.  core@@ has approved this import.

Description:

Kyua (pronounced Q.A.) is a testing framework for both developers and
users.  Kyua is different from most other testing frameworks in that it
puts the end user experience before anything else.  There are multiple
reasons for users to run the tests themselves, and Kyua ensures that
they can do so in the most convenient way.

This module, kyua-cli, provides the command-line interface to the Kyua
runtime system.  The major purpose of this tool is to run test cases and
generate unified reports for their results.
@
text
@@


1.1.1.1.12.1
log
@file programmer.cpp was added on branch yamt-pagecache on 2014-05-22 15:45:30 +0000
@
text
@d1 137
@


1.1.1.1.12.2
log
@sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")
@
text
@a0 137
// Copyright 2010 Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Google Inc. 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
// OWNER 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 "utils/signals/programmer.hpp"

extern "C" {
#include <signal.h>
}

#include <cerrno>

#include "utils/format/macros.hpp"
#include "utils/logging/macros.hpp"
#include "utils/sanity.hpp"
#include "utils/signals/exceptions.hpp"


namespace utils {
namespace signals {


/// Internal implementation for the signals::programmer class.
struct programmer::impl {
    /// The number of the signal managed by this programmer.
    int signo;

    /// Whether the signal is currently programmed by us or not.
    bool programmed;

    /// The signal handler that we replaced; to be restored on unprogramming.
    struct ::sigaction old_sa;

    /// Initializes the internal implementation of the programmer.
    ///
    /// \param signo_ The signal number.
    impl(const int signo_) :
        signo(signo_),
        programmed(false)
    {
    }
};


} // namespace signals
} // namespace utils


namespace signals = utils::signals;


/// Programs a signal handler.
///
/// \param signo The signal for which to install the handler.
/// \param handler The handler to install.
///
/// \throw signals::system_error If there is an error programming the signal.
signals::programmer::programmer(const int signo, const handler_type handler) :
    _pimpl(new impl(signo))
{
    struct ::sigaction sa;
    sa.sa_handler = handler;
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = SA_RESTART;

    if (::sigaction(_pimpl->signo, &sa, &_pimpl->old_sa) == -1) {
        const int original_errno = errno;
        throw system_error(F("Could not install handler for signal %s") %
                           _pimpl->signo, original_errno);
    } else
        _pimpl->programmed = true;
}


/// Destructor; unprograms the signal handler if still programmed.
///
/// Given that this is a destructor and it can't report errors back to the
/// caller, the caller must attempt to call unprogram() on its own.
signals::programmer::~programmer(void)
{
    if (_pimpl->programmed) {
        LW("Destroying still-programmed signals::programmer object");
        try {
            unprogram();
        } catch (const system_error& e) {
            UNREACHABLE;
        }
    }
}


/// Unprograms the signal handler.
///
/// \pre The signal handler is programmed (i.e. this can only be called once).
///
/// \throw system_error If unprogramming the signal failed.  If this happens,
///     the signal is left programmed, this object forgets about the signal and
///     therefore there is no way to restore the original handler.
void
signals::programmer::unprogram(void)
{
    PRE(_pimpl->programmed);

    // If we fail, we don't want the destructor to attempt to unprogram the
    // handler again, as it would result in a crash.
    _pimpl->programmed = false;

    if (::sigaction(_pimpl->signo, &_pimpl->old_sa, NULL) == -1) {
        const int original_errno = errno;
        throw system_error(F("Could not reset handler for signal %s") %
                           _pimpl->signo, original_errno);
    }
}
@


1.1.1.1.4.1
log
@file programmer.cpp was added on branch tls-maxphys on 2013-02-25 00:26:18 +0000
@
text
@d1 137
@


1.1.1.1.4.2
log
@resync with head
@
text
@a0 137
// Copyright 2010 Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
//   notice, this list of conditions and the following disclaimer.
// * 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.
// * Neither the name of Google Inc. 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
// OWNER 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 "utils/signals/programmer.hpp"

extern "C" {
#include <signal.h>
}

#include <cerrno>

#include "utils/format/macros.hpp"
#include "utils/logging/macros.hpp"
#include "utils/sanity.hpp"
#include "utils/signals/exceptions.hpp"


namespace utils {
namespace signals {


/// Internal implementation for the signals::programmer class.
struct programmer::impl {
    /// The number of the signal managed by this programmer.
    int signo;

    /// Whether the signal is currently programmed by us or not.
    bool programmed;

    /// The signal handler that we replaced; to be restored on unprogramming.
    struct ::sigaction old_sa;

    /// Initializes the internal implementation of the programmer.
    ///
    /// \param signo_ The signal number.
    impl(const int signo_) :
        signo(signo_),
        programmed(false)
    {
    }
};


} // namespace signals
} // namespace utils


namespace signals = utils::signals;


/// Programs a signal handler.
///
/// \param signo The signal for which to install the handler.
/// \param handler The handler to install.
///
/// \throw signals::system_error If there is an error programming the signal.
signals::programmer::programmer(const int signo, const handler_type handler) :
    _pimpl(new impl(signo))
{
    struct ::sigaction sa;
    sa.sa_handler = handler;
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = SA_RESTART;

    if (::sigaction(_pimpl->signo, &sa, &_pimpl->old_sa) == -1) {
        const int original_errno = errno;
        throw system_error(F("Could not install handler for signal %s") %
                           _pimpl->signo, original_errno);
    } else
        _pimpl->programmed = true;
}


/// Destructor; unprograms the signal handler if still programmed.
///
/// Given that this is a destructor and it can't report errors back to the
/// caller, the caller must attempt to call unprogram() on its own.
signals::programmer::~programmer(void)
{
    if (_pimpl->programmed) {
        LW("Destroying still-programmed signals::programmer object");
        try {
            unprogram();
        } catch (const system_error& e) {
            UNREACHABLE;
        }
    }
}


/// Unprograms the signal handler.
///
/// \pre The signal handler is programmed (i.e. this can only be called once).
///
/// \throw system_error If unprogramming the signal failed.  If this happens,
///     the signal is left programmed, this object forgets about the signal and
///     therefore there is no way to restore the original handler.
void
signals::programmer::unprogram(void)
{
    PRE(_pimpl->programmed);

    // If we fail, we don't want the destructor to attempt to unprogram the
    // handler again, as it would result in a crash.
    _pimpl->programmed = false;

    if (::sigaction(_pimpl->signo, &_pimpl->old_sa, NULL) == -1) {
        const int original_errno = errno;
        throw system_error(F("Could not reset handler for signal %s") %
                           _pimpl->signo, original_errno);
    }
}
@