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104 lines
3.7 KiB
C++
104 lines
3.7 KiB
C++
// -*- mode: C++; c-file-style: "cc-mode" -*-
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//*************************************************************************
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//
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// Code available from: https://verilator.org
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//
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// Copyright 2003-2024 by Wilson Snyder. This program is free software; you can
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// redistribute it and/or modify it under the terms of either the GNU
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// Lesser General Public License Version 3 or the Perl Artistic License
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// Version 2.0.
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// SPDX-License-Identifier: LGPL-3.0-only OR Artistic-2.0
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//
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//*************************************************************************
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///
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/// \file
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/// \brief Verilated/Verilator common implementation for OS portability
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///
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/// This is compiled as part of other .cpp files to reduce compile time
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/// and as such is a .h file rather than .cpp file.
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///
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//*************************************************************************
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#ifndef VL_ALLOW_VERILATEDOS_C
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#error "This file should be included only from V3Os.cpp/Verilated.cpp"
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#endif
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#include "verilatedos.h"
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// clang-format off
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#if defined(_WIN32) || defined(__MINGW32__)
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# include <windows.h> // LONG for bcrypt.h on MINGW
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# include <processthreadsapi.h> // GetProcessTimes
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# include <psapi.h> // GetProcessMemoryInfo
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#endif
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// clang-format on
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namespace VlOs {
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//=========================================================================
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// VlOs::VlGetCpuTime/VlGetWallTime implementation
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double DeltaCpuTime::gettime() VL_MT_SAFE {
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#if defined(_WIN32) || defined(__MINGW32__)
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FILETIME lpCreationTime, lpExitTime, lpKernelTime, lpUserTime;
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if (0
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!= GetProcessTimes(GetCurrentProcess(), &lpCreationTime, &lpExitTime, &lpKernelTime,
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&lpUserTime)) {
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return static_cast<double>(static_cast<uint64_t>(lpUserTime.dwLowDateTime)
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| static_cast<uint64_t>(lpUserTime.dwHighDateTime) << 32ULL)
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* 1e-7;
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}
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#else
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// NOLINTNEXTLINE(cppcoreguidelines-pro-type-member-init)
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timespec ts;
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if (0 != clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts)) // MT-Safe
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return ts.tv_sec + ts.tv_nsec * 1e-9;
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#endif
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return 0.0;
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}
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double DeltaWallTime::gettime() VL_MT_SAFE {
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#if defined(_WIN32) || defined(__MINGW32__)
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FILETIME ft; // contains number of 0.1us intervals since the beginning of 1601 UTC.
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GetSystemTimeAsFileTime(&ft);
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const uint64_t tenthus
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= ((static_cast<uint64_t>(ft.dwHighDateTime) << 32) + ft.dwLowDateTime + 5ULL);
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return static_cast<double>(tenthus) * 1e-7;
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#else
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// NOLINTNEXTLINE(cppcoreguidelines-pro-type-member-init)
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timespec ts;
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if (0 == clock_gettime(CLOCK_MONOTONIC, &ts)) // MT-Safe
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return ts.tv_sec + ts.tv_nsec * 1e-9;
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return 0.0;
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#endif
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}
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//=========================================================================
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// VlOs::memUsageBytes implementation
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uint64_t memUsageBytes() VL_MT_SAFE {
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#if defined(_WIN32) || defined(__MINGW32__)
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const HANDLE process = GetCurrentProcess();
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PROCESS_MEMORY_COUNTERS pmc;
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if (GetProcessMemoryInfo(process, &pmc, sizeof(pmc))) {
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// The best we can do using simple Windows APIs is to get the size of the working set.
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return pmc.WorkingSetSize;
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}
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return 0;
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#else
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// Highly unportable. Sorry
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const char* const statmFilename = "/proc/self/statm";
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FILE* const fp = fopen(statmFilename, "r");
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if (!fp) return 0;
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uint64_t size, resident, share, text, lib, data, dt; // All in pages
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const int items = fscanf(
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fp, "%" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64 " %" SCNu64,
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&size, &resident, &share, &text, &lib, &data, &dt);
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fclose(fp);
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if (VL_UNCOVERABLE(7 != items)) return 0;
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return (text + data) * getpagesize();
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#endif
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}
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//=========================================================================
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} //namespace VlOs
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