Source code for PyMca5.PyMcaMisc.PhysicalMemory

#/*##########################################################################
#
# The PyMca X-Ray Fluorescence Toolkit
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# Copyright (c) 2004-2014 European Synchrotron Radiation Facility
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__author__ = "V.A. Sole - ESRF Data Analysis"
__contact__ = "sole@esrf.fr"
__license__ = "MIT"
__copyright__ = "European Synchrotron Radiation Facility, Grenoble, France"
import sys
import os
import ctypes
import traceback

[docs]def loadCLibrary(name="libc.so"): try: libc = ctypes.CDLL(name) except OSError: text = traceback.format_exc() if "invalid ELF header" in text: library = text.split(": ") if len(library) > 1: libraryFile = library[1] if os.path.exists(libraryFile): # to read some line f = open(libraryFile, 'r') for i in range(10): line = f.readline() if name in line: f.close() lineSplit = line.split(name) libraryFile = lineSplit[0].split()[-1] +\ name+\ lineSplit[1].split()[0] break libraryFile = line[line.index(libraryFile):].split()[0] libc = ctypes.CDLL(libraryFile) else: raise return libc
if sys.platform == 'win32': class MEMORYSTATUSEX(ctypes.Structure): _fields_ = [ ("dwLength", ctypes.c_ulong), ("dwMemoryLoad", ctypes.c_ulong), ("ullTotalPhys", ctypes.c_ulonglong), ("ullAvailPhys", ctypes.c_ulonglong), ("ullTotalPageFile", ctypes.c_ulonglong), ("ullAvailPageFile", ctypes.c_ulonglong), ("ullTotalVirtual", ctypes.c_ulonglong), ("ullAvailVirtual", ctypes.c_ulonglong), ("sullAvailExtendedVirtual", ctypes.c_ulonglong), ] def __init__(self): # have to initialize this to the size of MEMORYSTATUSEX self.dwLength = ctypes.sizeof(self) super(MEMORYSTATUSEX, self).__init__() #print("MemoryLoad: %d%%" % (stat.dwMemoryLoad)) #print("Physical memory = %d" % stat.ullTotalPhys) #print(stat.ullAvailPhys) def getPhysicalMemory(): stat = MEMORYSTATUSEX() ctypes.windll.kernel32.GlobalMemoryStatusEx(ctypes.byref(stat)) return stat.ullTotalPhys elif sys.platform.startswith('linux'): def getPhysicalMemory(): return os.sysconf('SC_PAGESIZE') * os.sysconf('SC_PHYS_PAGES') elif sys.platform == 'darwin': def getPhysicalMemory(): libc = loadCLibrary("libc.dylib") memsize = ctypes.c_uint64(0) length = ctypes.c_size_t(ctypes.sizeof(memsize)) libc.sysctlbyname("hw.memsize", ctypes.byref(memsize), ctypes.byref(length), None, 0) return memsize.value else:
[docs] def getPhysicalMemory(): return None
[docs]def getPhysicalMemoryOrNone(): try: return getPhysicalMemory() except: return None
if __name__ == "__main__": print("Physical memory = %d" % getPhysicalMemory())