Chris@150: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@150: 
Chris@150: /*
Chris@150:     Sonic Visualiser
Chris@150:     An audio file viewer and annotation editor.
Chris@150:     Centre for Digital Music, Queen Mary, University of London.
Chris@150:     This file copyright 2006 Chris Cannam.
Chris@150:     
Chris@150:     This program is free software; you can redistribute it and/or
Chris@150:     modify it under the terms of the GNU General Public License as
Chris@150:     published by the Free Software Foundation; either version 2 of the
Chris@150:     License, or (at your option) any later version.  See the file
Chris@150:     COPYING included with this distribution for more information.
Chris@150: */
Chris@150: 
Chris@150: #include "System.h"
Chris@150: 
Chris@168: #include <QStringList>
Chris@168: #include <QString>
Chris@168: 
Chris@150: #ifndef _WIN32
Chris@150: #include <signal.h>
Chris@168: #include <sys/statvfs.h>
Chris@150: #endif
Chris@150: 
Chris@150: #include <iostream>
Chris@150: 
Chris@150: #ifdef _WIN32
Chris@150: 
Chris@150: extern "C" {
Chris@150: 
Chris@150: void usleep(unsigned long usec)
Chris@150: {
Chris@150:     ::Sleep(usec / 1000);
Chris@150: }
Chris@150: 
Chris@150: void gettimeofday(struct timeval *tv, void *tz)
Chris@150: {
Chris@150:     union { 
Chris@150: 	long long ns100;  
Chris@150: 	FILETIME ft; 
Chris@150:     } now; 
Chris@150:     
Chris@150:     ::GetSystemTimeAsFileTime(&now.ft); 
Chris@150:     tv->tv_usec = (long)((now.ns100 / 10LL) % 1000000LL); 
Chris@150:     tv->tv_sec = (long)((now.ns100 - 116444736000000000LL) / 10000000LL); 
Chris@150: }
Chris@150: 
Chris@150: }
Chris@150: 
Chris@150: #endif
Chris@150: 
Chris@150: ProcessStatus
Chris@150: GetProcessStatus(int pid)
Chris@150: {
Chris@150: #ifdef _WIN32
Chris@150:     HANDLE handle = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, pid);
Chris@150:     if (!handle) {
Chris@150:         return ProcessNotRunning;
Chris@150:     } else {
Chris@150:         CloseHandle(handle);
Chris@150:         return ProcessRunning;
Chris@150:     }
Chris@150: #else
Chris@150:     if (kill(getpid(), 0) == 0) {
Chris@150:         if (kill(pid, 0) == 0) {
Chris@150:             return ProcessRunning;
Chris@150:         } else {
Chris@150:             return ProcessNotRunning;
Chris@150:         }
Chris@150:     } else {
Chris@150:         return UnknownProcessStatus;
Chris@150:     }
Chris@150: #endif
Chris@150: }
Chris@150: 
Chris@168: int
Chris@168: GetRealMemoryMBAvailable()
Chris@168: {
Chris@169:     FILE *meminfo = fopen("/proc/meminfo", "r");
Chris@169:     if (!meminfo) return -1;
Chris@169: 
Chris@169:     char buf[256];
Chris@169:     while (!feof(meminfo)) {
Chris@169:         fgets(buf, 256, meminfo);
Chris@169:         if (strncmp(buf, "MemFree:", 8)) {
Chris@169:             fclose(meminfo);
Chris@169:             QString line = QString(buf).trimmed();
Chris@169:             QStringList elements = line.split(' ', QString::SkipEmptyParts);
Chris@169:             QString unit = "kB";
Chris@169:             if (elements.size() > 2) unit = elements[2];
Chris@169:             int size = elements[1].toInt();
Chris@169: //            std::cerr << "have size \"" << size << "\", unit \""
Chris@169: //                      << unit.toStdString() << "\"" << std::endl;
Chris@169:             if (unit.toLower() == "gb") return size * 1024;
Chris@169:             if (unit.toLower() == "mb") return size;
Chris@169:             if (unit.toLower() == "kb") return size / 1024;
Chris@169:             return size / 1048576;
Chris@168:         }
Chris@168:     }
Chris@169:     fclose(meminfo);
Chris@168:     return -1;
Chris@168: }
Chris@168: 
Chris@168: int
Chris@168: GetDiscSpaceMBAvailable(const char *path)
Chris@168: {
Chris@168: #ifdef _WIN32
Chris@168:     __int64 available, total, totalFree;
Chris@168:     if (GetDiskFreeSpaceEx(path, &available, &total, &totalFree)) {
Chris@168:         available /= 1048576;
Chris@168:         return int(available);
Chris@168:     } else {
Chris@168:         std::cerr << "WARNING: GetDiskFreeSpaceEx failed: error code "
Chris@168:                   << GetLastError() << std::endl;
Chris@168:         return -1;
Chris@168:     }
Chris@168: #else
Chris@168:     struct statvfs buf;
Chris@168:     if (!statvfs(path, &buf)) {
Chris@168:         // do the multiplies and divides in this order to reduce the
Chris@168:         // likelihood of arithmetic overflow
Chris@168:         std::cerr << "statvfs(" << path << ") says available: " << buf.f_bavail << ", block size: " << buf.f_bsize << std::endl;
Chris@168:         return ((buf.f_bavail / 1024) * buf.f_bsize) / 1024;
Chris@168:     } else {
Chris@168:         perror("statvfs failed");
Chris@168:         return -1;
Chris@168:     }
Chris@168: #endif
Chris@168: }
Chris@168:     
Chris@168: 
Chris@150: double mod(double x, double y) { return x - (y * floor(x / y)); }
Chris@150: float modf(float x, float y) { return x - (y * floorf(x / y)); }
Chris@150: 
Chris@150: double princarg(double a) { return mod(a + M_PI, -2 * M_PI) + M_PI; }
Chris@150: float princargf(float a) { return modf(a + M_PI, -2 * M_PI) + M_PI; }
Chris@150: