Mercurial > hg > svcore
view system/System.cpp @ 420:50a956688baa
* reorganise tabular data editor model support
author | Chris Cannam |
---|---|
date | Wed, 11 Jun 2008 16:13:25 +0000 |
parents | 65311fb86166 |
children | cff476cfce77 |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This file copyright 2006 Chris Cannam and QMUL. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #include "System.h" #include <QStringList> #include <QString> #include <stdint.h> #ifndef _WIN32 #include <signal.h> #include <sys/statvfs.h> #endif #ifdef __APPLE__ #include <sys/param.h> #include <sys/sysctl.h> #endif #include <limits.h> #include <cstdlib> #include <iostream> #ifdef __APPLE__ extern "C" { void * rpl_realloc (void *p, size_t n) { p = realloc(p, n); if (p == 0 && n == 0) { p = malloc(0); } return p; } } #endif #ifdef _WIN32 extern "C" { void usleep(unsigned long usec) { ::Sleep(usec / 1000); } void gettimeofday(struct timeval *tv, void *tz) { union { long long ns100; FILETIME ft; } now; ::GetSystemTimeAsFileTime(&now.ft); tv->tv_usec = (long)((now.ns100 / 10LL) % 1000000LL); tv->tv_sec = (long)((now.ns100 - 116444736000000000LL) / 10000000LL); } } #endif ProcessStatus GetProcessStatus(int pid) { #ifdef _WIN32 HANDLE handle = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid); if (!handle) { return ProcessNotRunning; } else { CloseHandle(handle); return ProcessRunning; } #else if (kill(getpid(), 0) == 0) { if (kill(pid, 0) == 0) { return ProcessRunning; } else { return ProcessNotRunning; } } else { return UnknownProcessStatus; } #endif } #ifdef _WIN32 /* MEMORYSTATUSEX is missing from older Windows headers, so define a local replacement. This trick from MinGW source code. Ugh */ typedef struct { DWORD dwLength; DWORD dwMemoryLoad; DWORDLONG ullTotalPhys; DWORDLONG ullAvailPhys; DWORDLONG ullTotalPageFile; DWORDLONG ullAvailPageFile; DWORDLONG ullTotalVirtual; DWORDLONG ullAvailVirtual; DWORDLONG ullAvailExtendedVirtual; } lMEMORYSTATUSEX; typedef WINBOOL (WINAPI *PFN_MS_EX) (lMEMORYSTATUSEX*); #endif void GetRealMemoryMBAvailable(int &available, int &total) { available = -1; total = -1; #ifdef _WIN32 static bool checked = false; static bool exFound = false; static PFN_MS_EX ex; if (!checked) { HMODULE h = GetModuleHandleA("kernel32.dll"); if (h) { if ((ex = (PFN_MS_EX)GetProcAddress(h, "GlobalMemoryStatusEx"))) { exFound = true; } } checked = true; } DWORDLONG wavail = 0; DWORDLONG wtotal = 0; if (exFound) { lMEMORYSTATUSEX lms; lms.dwLength = sizeof(lms); if (!ex(&lms)) { std::cerr << "WARNING: GlobalMemoryStatusEx failed: error code " << GetLastError() << std::endl; return; } wavail = lms.ullAvailPhys; wtotal = lms.ullTotalPhys; } else { /* Fall back to GlobalMemoryStatus which is always available. but returns wrong results for physical memory > 4GB */ MEMORYSTATUS ms; GlobalMemoryStatus(&ms); wavail = ms.dwAvailPhys; wtotal = ms.dwTotalPhys; } DWORDLONG size = wavail / 1048576; if (size > INT_MAX) size = INT_MAX; available = int(size); size = wtotal / 1048576; if (size > INT_MAX) size = INT_MAX; total = int(size); return; #else #ifdef __APPLE__ unsigned int val; int mib[2]; size_t size_sys; mib[0] = CTL_HW; mib[1] = HW_PHYSMEM; size_sys = sizeof(val); sysctl(mib, 2, &val, &size_sys, NULL, 0); if (val) total = val / 1048576; mib[1] = HW_USERMEM; size_sys = sizeof(val); sysctl(mib, 2, &val, &size_sys, NULL, 0); if (val) available = val / 1048576; return; #else FILE *meminfo = fopen("/proc/meminfo", "r"); if (!meminfo) return; char buf[256]; while (!feof(meminfo)) { fgets(buf, 256, meminfo); bool isMemFree = (strncmp(buf, "MemFree:", 8) == 0); bool isMemTotal = (!isMemFree && (strncmp(buf, "MemTotal:", 9) == 0)); if (isMemFree || isMemTotal) { QString line = QString(buf).trimmed(); QStringList elements = line.split(' ', QString::SkipEmptyParts); QString unit = "kB"; if (elements.size() > 2) unit = elements[2]; int size = elements[1].toInt(); // std::cerr << "have size \"" << size << "\", unit \"" // << unit.toStdString() << "\"" << std::endl; if (unit.toLower() == "gb") size = size * 1024; else if (unit.toLower() == "mb") size = size; else if (unit.toLower() == "kb") size = size / 1024; else size = size / 1048576; if (isMemFree) available = size; else total = size; } if (available != -1 && total != -1) { fclose(meminfo); return; } } fclose(meminfo); return; #endif #endif } int GetDiscSpaceMBAvailable(const char *path) { #ifdef _WIN32 ULARGE_INTEGER available, total, totalFree; if (GetDiskFreeSpaceExA(path, &available, &total, &totalFree)) { __int64 a = available.QuadPart; a /= 1048576; if (a > INT_MAX) a = INT_MAX; return int(a); } else { std::cerr << "WARNING: GetDiskFreeSpaceEx failed: error code " << GetLastError() << std::endl; return -1; } #else struct statvfs buf; if (!statvfs(path, &buf)) { // do the multiplies and divides in this order to reduce the // likelihood of arithmetic overflow std::cerr << "statvfs(" << path << ") says available: " << buf.f_bavail << ", block size: " << buf.f_bsize << std::endl; uint64_t available = ((buf.f_bavail / 1024) * buf.f_bsize) / 1024; if (available > INT_MAX) available = INT_MAX; return int(available); } else { perror("statvfs failed"); return -1; } #endif } static char *startupLocale = 0; void StoreStartupLocale() { char *loc = setlocale(LC_ALL, 0); if (!loc) return; if (startupLocale) free(startupLocale); startupLocale = strdup(loc); } void RestoreStartupLocale() { if (!startupLocale) { setlocale(LC_ALL, ""); } else { setlocale(LC_ALL, startupLocale); } } double mod(double x, double y) { return x - (y * floor(x / y)); } float modf(float x, float y) { return x - (y * floorf(x / y)); } double princarg(double a) { return mod(a + M_PI, -2 * M_PI) + M_PI; } float princargf(float a) { return modf(a + M_PI, -2 * M_PI) + M_PI; }