race.h

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#pragma once

#include "../goodies.h" // printStackTrace

namespace mongo {

#if defined(_DEBUG)

    class CodeBlock { 
        volatile int n;
        unsigned tid;
        void fail() { 
            log() << "synchronization (race condition) failure" << endl;
            printStackTrace();
            abort();
        }
        void enter() { 
            if( ++n != 1 ) fail();
#if defined(_WIN32)
            tid = GetCurrentThreadId();
#endif
        }
        void leave() {
            if( --n != 0 ) fail();
        }
    public:
        CodeBlock() : n(0) { }

        class Within { 
            CodeBlock& _s;
        public:
            Within(CodeBlock& s) : _s(s) { _s.enter(); }
            ~Within() { _s.leave(); }
        };

        void assertWithin() {
            assert( n == 1 );
#if defined(_WIN32)
            assert( GetCurrentThreadId() == tid );
#endif
        }
    };
    
#else

    class CodeBlock{ 
    public:
        class Within { 
        public:
            Within(CodeBlock&) { }
        };
        void assertWithin() { }
    };

#endif

}

---

mongodb
Author(s): Nate Koenig
autogenerated on Fri Jan 11 12:15:19 2013