mirror of https://github.com/CGAL/cgal
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
// Test program for CGAL::Memory_sizer.
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//
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// Sylvain Pion
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#include <CGAL/Memory_sizer.h>
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#include <iostream>
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int main()
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{
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#ifdef CGAL_DONT_HAVE_MEMORY_SIZER
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// Emit a warning :
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bool UNTESTED_BECAUSE_MEMORY_SIZER_IS_NOT_PORTED_ON_THIS_PLATFORM;
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std::cout << "WARNING : This platform does not implement Memory_sizer"
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<< std::endl;
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#else
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typedef CGAL::Memory_sizer::size_type size_type;
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CGAL::Memory_sizer mem;
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size_type v0 = mem.virtual_size();
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size_type r0 = mem.resident_size();
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std::cout << "Virtual size = " << v0
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<< " (" << (v0>>20) << " MB)" << std::endl;
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std::cout << "Resident size = " << r0
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<< " (" << (r0>>20) << " MB)" << std::endl;
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std::cout << "Now allocating 64MB" << std::endl;
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char *p = new char[64*1024*1024];
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size_type v1 = mem.virtual_size();
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size_type r1 = mem.resident_size();
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std::cout << "Virtual size = " << v1
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<< " (" << (v1>>20) << " MB)" << std::endl;
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std::cout << "Resident size = " << r1
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<< " (" << (r1>>20) << " MB)" << std::endl;
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std::cout << "Now touching it" << std::endl;
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for (int i=0; i<64*1024; ++i)
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p[1024*i] = 1;
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size_type v2 = mem.virtual_size();
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size_type r2 = mem.resident_size();
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std::cout << "Virtual size = " << v2
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<< " (" << (v2>>20) << " MB)" << std::endl;
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std::cout << "Resident size = " << r2
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<< " (" << (r2>>20) << " MB)" << std::endl;
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#endif // CGAL_DONT_HAVE_MEMORY_SIZER
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return 0;
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}
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