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ladybird/Libraries/LibCore/SyscallUtils.h

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Meta: Add license header to source files As suggested by Joshua, this commit adds the 2-clause BSD license as a comment block to the top of every source file. For the first pass, I've just added myself for simplicity. I encourage everyone to add themselves as copyright holders of any file they've added or modified in some significant way. If I've added myself in error somewhere, feel free to replace it with the appropriate copyright holder instead. Going forward, all new source files should include a license header.
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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* 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.
*
* 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.
*/
Userspace: Deal with select() returning EINTR on a signal interruption Add a trivial CSafeSyscall template that calls a callback until it stops returning EINTR, and use it everywhere we use select() now. Thanks to Andreas for the suggestion of using a template parameter for the syscall function to invoke.
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#pragma once
LibCore: Improve logging of errors in safe_syscall() somewhat
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#include <AK/LogStream.h>
#include <AK/StdLibExtras.h>
Userspace: Deal with select() returning EINTR on a signal interruption Add a trivial CSafeSyscall template that calls a callback until it stops returning EINTR, and use it everywhere we use select() now. Thanks to Andreas for the suggestion of using a template parameter for the syscall function to invoke.
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#include <errno.h>
Userspace: Add missing #includes now that AK/StdLibExtras.h is smaller
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#include <string.h>
Userspace: Deal with select() returning EINTR on a signal interruption Add a trivial CSafeSyscall template that calls a callback until it stops returning EINTR, and use it everywhere we use select() now. Thanks to Andreas for the suggestion of using a template parameter for the syscall function to invoke.
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#include <sys/types.h>
LibCore: Improve logging of errors in safe_syscall() somewhat
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#include <unistd.h>
Userspace: Deal with select() returning EINTR on a signal interruption Add a trivial CSafeSyscall template that calls a callback until it stops returning EINTR, and use it everywhere we use select() now. Thanks to Andreas for the suggestion of using a template parameter for the syscall function to invoke.
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LibCore: Merge the CSyscallUtils namespace into Core
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namespace Core {
Userspace: Deal with select() returning EINTR on a signal interruption Add a trivial CSafeSyscall template that calls a callback until it stops returning EINTR, and use it everywhere we use select() now. Thanks to Andreas for the suggestion of using a template parameter for the syscall function to invoke.
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LibCore: Improve logging of errors in safe_syscall() somewhat
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template<typename Syscall, class... Args>
inline int safe_syscall(Syscall syscall, Args&&... args)
{
Userspace: Deal with select() returning EINTR on a signal interruption Add a trivial CSafeSyscall template that calls a callback until it stops returning EINTR, and use it everywhere we use select() now. Thanks to Andreas for the suggestion of using a template parameter for the syscall function to invoke.
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for (;;) {
int sysret = syscall(forward<Args>(args)...);
if (sysret == -1) {
LibCore: Put safe_syscall() debug spam behind #ifdef
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#ifdef SAFE_SYSCALL_DEBUG
LibCore: Improve logging of errors in safe_syscall() somewhat
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int saved_errno = errno;
LibCore: Merge the CSyscallUtils namespace into Core
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dbg() << "Core::safe_syscall: " << sysret << " (" << saved_errno << ": " << strerror(saved_errno) << ")";
LibCore: Put safe_syscall() debug spam behind #ifdef
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#endif
Userspace: Deal with select() returning EINTR on a signal interruption Add a trivial CSafeSyscall template that calls a callback until it stops returning EINTR, and use it everywhere we use select() now. Thanks to Andreas for the suggestion of using a template parameter for the syscall function to invoke.
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if (errno == EINTR)
continue;
ASSERT_NOT_REACHED();
}
return sysret;
}
}
}
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