My all time favourite C++ Class
class Guard { public: Guard(NdbMutex *mtx) : m_mtx(mtx) { NdbMutex_Lock(m_mtx); }; Guard(NdbLockable & l) : m_mtx(l.m_mutex) { NdbMutex_Lock(m_mtx); }; ~Guard() { NdbMutex_Unlock(m_mtx); };...
View Articlestringstream is completely useless (and why C++ should have a snprintf)
It’s easy to screw up thread safety. If you’re trying to format something for output (e.g. leading zeros, only 1 decimal place or whatever… you know, format specifiers in printf) you are setting a...
View ArticleStored Procedures/Functions for Drizzle
Previously, in “Thoughts on Thoughts on Drizzle” I theorized that one of the major reasons why we did not see lots of people jumping at stored procedures in MySQL was that it wasn’t in their native...
View ArticleA MD5 stored procedure for Drizzle… in C
So, just in case that wasn’t evil enough for you… perhaps you have something you want to know the MD5 checksum of. So, you could just do this: drizzle> select md5('Hello World!');...
View ArticleOne last bit of evil….
You can store things for later! drizzle> select libtcc("#include <string.h>\n#include <stdlib.h>\nint foo(char* s) { char *a= malloc(1000); return snprintf(s, 100, \"%p\", a); }") as...
View ArticleA better set of Boost m4 macros
I just replaced the old Pandora boost m4 macros in a project with boost.m4 from https://github.com/tsuna/boost.m4 and it basically just solved all my problems with Boost and the whole set of...
View ArticleCarbon footprint of interpreted languages
Thought from a good discussion with at François at OSDC today, what is the carbon footprint of various languages? He mentioned that the carbon footprint of a new Haskell compiler release is remarkably...
View ArticleStandard versus Reality
While dereferencing a NULL pointer may be undefined, there’s a legitimate reason to do so: you want to store something at address 0. Why? Well, not all of us are fancy and have an MMU turned on.
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