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/*
* Author: David Robert Nadeau
* Site: http://NadeauSoftware.com/
* License: Creative Commons Attribution 3.0 Unported License
* http://creativecommons.org/licenses/by/3.0/deed.en_US
*
* This file has been adapted to match the coding style of the rest of the codebase.
*
* On windows link against psapi.lib, for the rest the standard library is sufficient.
*/
#include "getrssusage.h"
#if defined(_WIN32)
#include <windows.h>
#include <psapi.h>
#elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
#include <unistd.h>
#include <sys/resource.h>
#if defined(__APPLE__) && defined(__MACH__)
#include <mach/mach.h>
#elif(defined(_AIX) || defined(__TOS__AIX__)) || (defined(__sun__) || defined(__sun) || defined(sun) && (defined(__SVR4) || defined(__svr4__)))
#include <fcntl.h>
#include <procfs.h>
#elif defined(__linux__) || defined(__linux) || defined(linux) || defined(__gnu_linux__)
#include <stdio.h>
#endif
#else
#error "Cannot define getPeakRSS( ) or getCurrentRSS( ) for an unknown OS."
#endif
/**
* Returns the peak (maximum so far) resident set size (physical
* memory use) measured in bytes, or zero if the value cannot be
* determined on this OS.
*/
size_t getPeakRSS()
{
#if defined(_WIN32)
/* Windows -------------------------------------------------- */
PROCESS_MEMORY_COUNTERS info;
GetProcessMemoryInfo(GetCurrentProcess(), &info, sizeof(info));
return (size_t)info.PeakWorkingSetSize;
#elif(defined(_AIX) || defined(__TOS__AIX__)) || (defined(__sun__) || defined(__sun) || defined(sun) && (defined(__SVR4) || defined(__svr4__)))
/* AIX and Solaris ------------------------------------------ */
struct psinfo psinfo;
int fd = -1;
if ((fd = open("/proc/self/psinfo", O_RDONLY)) == -1)
return (size_t)0L; /* Can't open? */
if (read(fd, &psinfo, sizeof(psinfo)) != sizeof(psinfo)) {
close(fd);
return (size_t)0L; /* Can't read? */
}
close(fd);
return (size_t)(psinfo.pr_rssize * 1024L);
#elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
/* BSD, Linux, and OSX -------------------------------------- */
struct rusage rusage;
getrusage(RUSAGE_SELF, &rusage);
#if defined(__APPLE__) && defined(__MACH__)
return (size_t)rusage.ru_maxrss;
#else
return (size_t)(rusage.ru_maxrss * 1024L);
#endif
#else
/* Unknown OS ----------------------------------------------- */
return (size_t)0L; /* Unsupported. */
#endif
}
/**
* Returns the current resident set size (physical memory use) measured
* in bytes, or zero if the value cannot be determined on this OS.
*/
size_t getCurrentRSS()
{
#if defined(_WIN32)
/* Windows -------------------------------------------------- */
PROCESS_MEMORY_COUNTERS info;
GetProcessMemoryInfo(GetCurrentProcess(), &info, sizeof(info));
return (size_t)info.WorkingSetSize;
#elif defined(__APPLE__) && defined(__MACH__)
/* OSX ------------------------------------------------------ */
struct mach_task_basic_info info;
mach_msg_type_number_t infoCount = MACH_TASK_BASIC_INFO_COUNT;
if (task_info(mach_task_self(), MACH_TASK_BASIC_INFO, (task_info_t)&info, &infoCount) != KERN_SUCCESS)
return (size_t)0L; /* Can't access? */
return (size_t)info.resident_size;
#elif defined(__linux__) || defined(__linux) || defined(linux) || defined(__gnu_linux__)
/* Linux ---------------------------------------------------- */
long rss = 0L;
FILE *fp = NULL;
if ((fp = fopen("/proc/self/statm", "r")) == NULL)
return (size_t)0L; /* Can't open? */
if (fscanf(fp, "%*s%ld", &rss) != 1) {
fclose(fp);
return (size_t)0L; /* Can't read? */
}
fclose(fp);
return (size_t)rss * (size_t)sysconf(_SC_PAGESIZE);
#else
/* AIX, BSD, Solaris, and Unknown OS ------------------------ */
return (size_t)0L; /* Unsupported. */
#endif
}
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