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sortix--sortix/utils/memstat.cpp
2011-12-23 16:54:34 +01:00

57 lines
1.4 KiB
C++

#include <stdio.h>
#include <unistd.h>
#include <string.h>
void printbytes(unsigned long long bytes)
{
const unsigned BYTES = 0;
const unsigned KIBI = 1;
const unsigned MEBI = 2;
const unsigned GIBI = 3;
const unsigned TEBI = 4;
const unsigned PEBI = 5;
const unsigned EXBI = 6;
unsigned unit = BYTES;
if ( (bytes >> 10ULL) & 1023 ) { unit = KIBI; }
if ( (bytes >> 20ULL) & 1023 ) { unit = MEBI; }
if ( (bytes >> 30ULL) & 1023 ) { unit = GIBI; }
if ( (bytes >> 40ULL) & 1023 ) { unit = TEBI; }
if ( (bytes >> 50ULL) & 1023 ) { unit = PEBI; }
if ( (bytes >> 60ULL) & 1023 ) { unit = EXBI; }
switch ( unit )
{
case EXBI:
printf("%u ZiB ", (bytes >> 60ULL) & 1023);
case PEBI:
printf("%u PiB ", (bytes >> 50ULL) & 1023);
case TEBI:
printf("%u TiB ", (bytes >> 40ULL) & 1023);
case GIBI:
printf("%u GiB ", (bytes >> 30ULL) & 1023);
case MEBI:
printf("%u MiB ", (bytes >> 20ULL) & 1023);
case KIBI:
printf("%u KiB", (bytes >> 10ULL) & 1023);
break;
case BYTES:
printf("%u B", (bytes >> 0ULL) & 1023);
}
}
int main(int argc, char* argv[])
{
size_t memused = 0;
size_t memtotal = 0;
if ( memstat(&memused, &memtotal) ) { perror("memstat"); return 1; }
printf("memory usage: ");
printbytes(memused);
printf(" used / ");
printbytes(memtotal);
unsigned percent = ((unsigned long long) memused * 100ULL ) / memtotal;
printf(" total (%u%s)\n", percent, "%");
return 0;
}