雷电芽衣andClaude
c864304695
A layered image editor for Linux and Omarchy, ported from Compositor (github.com/robbietilton/Compositor), whose Swift source is its specification. It reads and writes Compositor's .comp projects. Packages for Ubuntu, Fedora and Arch come from the release workflow; scripts/install/ holds one install script per distribution family, and flake.nix serves NixOS. Co-Authored-By: Claude <noreply@anthropic.com>
36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
#pragma once
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#include <QFile>
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#include <QLibraryInfo>
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#include <QVersionNumber>
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#include <stdexcept>
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#include <sys/resource.h>
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#include <unistd.h>
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// While alive, the process may map only `margin` more bytes.
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class AddressSpaceLimit {
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public:
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explicit AddressSpaceLimit(qint64 margin)
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{
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QFile statm("/proc/self/statm");
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if (!statm.open(QIODevice::ReadOnly) || getrlimit(RLIMIT_AS, &m_previous) != 0)
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throw std::runtime_error("cannot read the address space in use");
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const qint64 mapped = statm.readAll().split(' ').first().toLongLong() * sysconf(_SC_PAGESIZE);
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rlimit tight = m_previous;
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tight.rlim_cur = rlim_t(mapped + margin);
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if (setrlimit(RLIMIT_AS, &tight) != 0)
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throw std::runtime_error("cannot lower RLIMIT_AS");
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}
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~AddressSpaceLimit() { setrlimit(RLIMIT_AS, &m_previous); }
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AddressSpaceLimit(const AddressSpaceLimit &) = delete;
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AddressSpaceLimit &operator=(const AddressSpaceLimit &) = delete;
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private:
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rlimit m_previous;
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};
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// Failure points are placed by Qt 6.4's own allocations.
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inline bool placesStarvation()
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{
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return QLibraryInfo::version().majorVersion() == 6 && QLibraryInfo::version().minorVersion() == 4;
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}
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