Name	Size	Mode	Actions
malloc.h	4771	0644	editdlrm

/*************************************************************************** * include/stxxl/bits/utils/malloc.h * * Part of the STXXL. See http://stxxl.sourceforge.net * * Copyright (C) 2003 Roman Dementiev * Copyright (C) 2009 Andreas Beckmann * * Distributed under the Boost Software License, Version 1.0. * (See accompanying file LICENSE_1_0.txt or copy at * http://www.boost.org/LICENSE_1_0.txt) **************************************************************************/ #ifndef STXXL_UTILS_MALLOC_HEADER #define STXXL_UTILS_MALLOC_HEADER #include #include #if STXXL_HAVE_MALLINFO_PROTO #include #endif #include #include #include STXXL_BEGIN_NAMESPACE //! Access to some useful malloc statistics. //! malloc is default C++ allocator class malloc_stats { #if STXXL_HAVE_MALLINFO_PROTO public: typedef int return_type; //! Returns number of bytes allocated from system not including mmapped regions. return_type from_system_nmmap() const { struct mallinfo info = mallinfo(); return info.arena; } //! Returns number of free chunks. return_type free_chunks() const { struct mallinfo info = mallinfo(); return info.ordblks; } //! Number of bytes allocated and in use. return_type used() const { struct mallinfo info = mallinfo(); return info.uordblks; } //! Number of bytes allocated but not in use. return_type not_used() const { struct mallinfo info = mallinfo(); return info.fordblks; } //! Top-most, releasable (via malloc_trim) space (bytes). return_type releasable() const { struct mallinfo info = mallinfo(); return info.keepcost; } //! Maximum total allocated space (bytes) (always 0 ?). return_type max_allocated() const { struct mallinfo info = mallinfo(); return info.usmblks; } //! Number of fastbin blocks. return_type fastbin_blocks() const { struct mallinfo info = mallinfo(); return info.smblks; } //! Space available in freed fastbin blocks (bytes). return_type fastbin_free() const { struct mallinfo info = mallinfo(); return info.fsmblks; } //! Returns number of bytes allocated from system using mmap. return_type from_system_mmap() const { struct mallinfo info = mallinfo(); return info.hblkhd; } //! Number of chunks allocated via mmap(). return_type mmap_chunks() const { struct mallinfo info = mallinfo(); return info.hblks; } //! Returns \b total number of bytes allocated from system including mmapped regions. return_type from_system_total() const { return from_system_nmmap() + from_system_mmap(); } #endif }; //! Prints current malloc statistics in a convenient way. inline std::ostream& operator << (std::ostream& s, const malloc_stats& st) { #if STXXL_HAVE_MALLINFO_PROTO s << "MALLOC statistics" << std::endl; s << "=================================================================" << std::endl; s << "Space allocated from system not using mmap: " << st.from_system_nmmap() << " bytes" << std::endl; s << " number of free chunks : " << st.free_chunks() << std::endl; s << " space allocated and in use : " << st.used() << " bytes" << std::endl; s << " space allocated but not in use : " << st.not_used() << " bytes" << std::endl; s << " top-most, releasable (via malloc_trim) space: " << st.releasable() << " bytes" << std::endl; s << " maximum total allocated space (?) : " << st.max_allocated() << " bytes" << std::endl; s << " FASTBIN blocks " << std::endl; s << " number of fastbin blocks: " << st.fastbin_blocks() << std::endl; s << " space available in freed fastbin blocks: " << st.fastbin_free() << " bytes" << std::endl; s << "Space allocated from system using mmap: " << st.from_system_mmap() << " bytes" << std::endl; s << " number of chunks allocated via mmap(): " << st.mmap_chunks() << std::endl; s << "Total space allocated from system (mmap and not mmap): " << st.from_system_total() << " bytes" << std::endl; s << "=================================================================" << std::endl; #else s << "MALLOC statistics are not supported on this platform"; STXXL_UNUSED(st); #endif return s; } class malloc_setup { }; STXXL_END_NAMESPACE #endif // !STXXL_UTILS_MALLOC_HEADER