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How to monitor a directory for changes with ReadDirectoryChangesW

Here's how to use  ReadDirectoryChangesW  without knowing all of this and without using this overkill C++ class library (remove the &o parameter in the call to make it blocking instead of async. Note: This only returns one change, you have to step trough a buffer of FILE_NOTIFY_INFORMATIONs if you need to get more): HANDLE hDirectory ; OVERLAPPED o = { 0 }; union { FILE_NOTIFY_INFORMATION i ; char d [ sizeof ( FILE_NOTIFY_INFORMATION )+ MAX_PATH ]; } fni ; int checkAutoCompile () { DWORD b ; if (! hDirectory ) { hDirectory = CreateFile ( "." , FILE_LIST_DIRECTORY | GENERIC_READ , FILE_SHARE_READ | FILE_SHARE_WRITE , 0 , OPEN_EXISTING , FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED , 0 ); o . hEvent = CreateEvent ( 0 , 0 , 0 , 0 ); } ReadDirectoryChangesW ( hDirectory , & fni , sizeof ( fni ), TR...
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Extended Terrain XYZ now free and open source

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This is a 3D Terrain Editor I created back in 2007 with Dark BASIC Pro (free now, anybody should be able to compile this). Along with standard heightmap terrain editor features, it also allows shifting the vertices to create simple overhangs and caves. Videos Download Extended Terrain XYZ - Open Source - fix-dlls.zip (7.8 MB) - compiled executable and instructions for compiling included (ReadMe.txt) ExtendedTerrainXYZDemoMaps.zip (26.5 MB) ExtendedTerrainXYZRequiredPlugins.zip (2.1 MB) - you need these if you want to build from source Old Information:  link
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Fastest way to zero out memory - stream past cache with movntdq/_mm_stream_si128

As a rule of thumb, this technique is only beneficial if the buffer is larger than half the largest level cache. #include <time.h> #include <stdio.h> #include <stdlib.h> #include <stdlib.h> #include <emmintrin.h> #include <intrin.h> typedef unsigned long long ull ; ull tsc ; int clk ; // Stream 64 Bytes to DRAM, bypass caches. _p must be 16-byte aligned. template < typename T > inline void memstream ( T * _p , const __m128i & i ) { char * p = ( char *) _p ; _mm_stream_si128 (( __m128i *)& p [ 0 ], i ); _mm_stream_si128 (( __m128i *)& p [ 16 ], i ); _mm_stream_si128 (( __m128i *)& p [ 32 ], i ); _mm_stream_si128 (( __m128i *)& p [ 48 ], i ); } inline void serialize () { int a [ 4 ]; __cpuid ( a , 0 );} inline void starttimer () { clk = clock (); serialize (); tsc = __rdtsc ();} inline void stoptimer ( char * n ) { serialize (); ull tsc2 = __rdtsc...
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